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1© Copyright 2014 EMC Corporation. All rights reserved. Microsoft Exchange Best Practices and Design Guidelines on EMC Storage Exchange 2010 and Exchange 2013 VNX and VMAX Storage Systems EMC Global Solutions | Global Solutions Engineering October 2014 Update
2© Copyright 2014 EMC Corporation. All rights reserved. Exchange – What has changed Exchange Virtualization Exchange Storage Design Exchange DR options Exchange Validated Solutions ESI for VNX Pool Optimization Tool (fka SOAP) Building Block Design Example Topics Exchange Archiving
3© Copyright 2014 EMC Corporation. All rights reserved. Exchange – What has changed
4© Copyright 2014 EMC Corporation. All rights reserved. Exchange…What has changed
5© Copyright 2014 EMC Corporation. All rights reserved. Exchange User Profile Changes Messages sent/ received per mailbox per day Exchange 2010 Estimated IOPS per mailbox (Active or Passive) Exchange 2013 Estimated IOPS per mailbox (Active or Passive) Mailbox resiliencyStand-alone
6© Copyright 2014 EMC Corporation. All rights reserved. Exchange Processor Requirements Changes Messages sent or received per mailbox per day Megacycles per User Active DB Copy or Standalone (MBX only) Megacycles per User Active DB Copy or Standalone (Multi-Role) Megacycles per User Passive DB Copy Exchange 2010 Exchange 2013 Exchange 2010 Exchange 2013 Exchange 2010 Exchange N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
7© Copyright 2014 EMC Corporation. All rights reserved. Exchange I/O Characteristics I/O TypeExchange 2007Exchange 2010Exchange 2013 Database I/O8 KB random write I/O32 KB random I/O Background Database Maintenance (BDM) I/O N/A 256 KB Sequential Read I/O Log I/O Varies in size from 512 bytes to the log buffer size (1 MB) Varies in size from 4 KB to the log buffer size (1 MB)
8© Copyright 2014 EMC Corporation. All rights reserved. Exchange 2010/2013 mailbox database I/O read/write ratios Messages sent/received per mailbox per day Stand-alone databases Databases participating in mailbox resiliency 501:13:2 1001:13:2 1501:13:2 2001:13:2 2501:13:2 3002:31:1 3502:31:1 4002:31:1 4502:31:1 5002:31:1
9© Copyright 2014 EMC Corporation. All rights reserved. Understanding Exchange I/O Exchange 2010/2013 I/O’s to the database (.edb) are divided into two types: – Transactional I/O (aka user I/O) Database volume I/O (database reads and writes) Log volume I/O (logs reads and writes) – Non Transactional I/O Background Database Maintenance (Checksum) (BDM) NOTE: Only database I/O’s are measured when sizing storage and during Jetstress validation For more details see “Understanding Database and Log Performance Factors” at
10© Copyright 2014 EMC Corporation. All rights reserved. Background Database Maintenance (BDM) BDM is the process of Exchange Server 2010/2013 database maintenance that includes online defragmentation and online database scanning Both active and passive database copies are scanned –On active copy can be scheduled to run during the online maintenance window (default is 24 x 7) –Passive copy is ”hardcoded” to 24 x 7 scan –Jetstress has no concept of passive copy, all are active Possible BDM related issues (mostly for Exchange 2010): Bandwidth/throughput required for BDM and BDM IOPS Not enough FE ports, not enough BE ports, non-optimal RAID configuration Exchange 2010Exchange 2013 Read I/O size256 KB Database scan completion1 weekevery 4 weeks IOPS per database309 Bandwidth7.5 MB/s*2.25 MB/s*
11© Copyright 2014 EMC Corporation. All rights reserved. Exchange Content Index Considerations Content Indexing space considerations: – In Exchange 2010 content index space is estimated at about 10% of the database size. – In Exchange 2013 content index space is estimated at about 20% of the database size. An additional 20% must be added for content indexing maintenance tasks (such as the master merge process) to complete. Calculations References exchange-2013-deployments.aspx exchange-2013-deployments.aspx
12© Copyright 2014 EMC Corporation. All rights reserved. Exchange High Availability Key Terminology TermDescription Active Manager An internal Exchange component which runs inside the Microsoft Exchange Replication service that's responsible for failure monitoring and corrective action through failover within a database availability group (DAG). AutoDatabaseMountDial A property setting of a Mailbox server that determines whether a passive database copy will automatically mount as the new active copy, based on the number of log files missing by the copy being mounted. Continuous replication - block mode In block mode, as each update is written to the active database copy's active log buffer, it's also shipped to a log buffer on each of the passive mailbox copies in block mode. When the log buffer is full, each database copy builds, inspects, and creates the next log file in the generation sequence. Continuous replication - file mode In file mode, closed transaction log files are pushed from the active database copy to one or more passive database copies. Database availability group (DAG) A group of up to 16 Exchange 2013 Mailbox servers that hosts a set of replicated databases. Database mobility The ability of an Exchange 2013 mailbox database to be replicated to and mounted on other Exchange 2013 Mailbox servers. Datacenter Activation Coordination mode A property of the DAG setting that, when enabled, forces the Microsoft Exchange Replication service to acquire permission to mount databases at startup.
13© Copyright 2014 EMC Corporation. All rights reserved. Exchange High Availability Key Terminology TermDescription Disaster recoveryAny process used to manually recover from a failure. This can be a failure that affects a single item, or it can be a failure that affects an entire physical location. Exchange third-party replication APIAn Exchange-provided API that enables use of third-party synchronous replication for a DAG instead of continuous replication. High availabilityA solution that provides service availability, data availability, and automatic recovery from failures that affect the service or data (such as a network, storage, or server failure). Lagged mailbox database copyA passive mailbox database copy that has a log replay lag time greater than zero. Mailbox database copyA mailbox database (.edb file and logs), which is either active or passive. Mailbox resiliencyThe name of a unified high availability and site resilience solution in Exchange Managed availabilityA set of internal processes made up of probes, monitors, and responders that incorporate monitoring and high availability across all server roles and all protocols.
14© Copyright 2014 EMC Corporation. All rights reserved. Exchange High Availability Key Terminology TermDescription A switchoverIs a manual activation of one or more database copies A failover Is an automatic activation of one or more database copies after a failure. Safety Net Formerly known as transport dumpster, this is a feature of the transport service that stores a copy of all messages for X days. The default setting is 2 days. Shadow redundancy A transport server feature that provides redundancy for messages for the entire time they're in transit. Site resilience A configuration that extends the messaging infrastructure to multiple Active Directory sites to provide operational continuity for the messaging system in the event of a failure affecting one of the sites.
15© Copyright 2014 EMC Corporation. All rights reserved. DB1 DB3 DB2 Copy Database Availability Group A = Active P = Passive A A A P P P P P P Exchange High Availability Base component of the high availability and site resilience framework built into Exchange 2010/2013 A group of servers participating within a Windows failover cluster with a limit of 16 servers and 100 databases. All servers participating within a DAG can have a copy of any database within the DAG – Each DAG member server can house one copy of each database, up to 16 copies, with only one being active, passive, or lagged No configuration of cluster services are required – Exchange 2010/2013 handles the entire installation – During site DR - manual work, scripts must be run A DAG does not provide recovery for logical database corruption Database Availability Group (DAG) MBX1MBX3 MBX2
16© Copyright 2014 EMC Corporation. All rights reserved. Exchange High Availability Ensure all elements of the design have resilient components – Storage processors – Connectivity to the servers – Storage spindles – Multiple arrays in DR scenarios DAG copies should be stored on separate physical spindles – Provided all resiliency is reached at the source site On SANs, consider performance of the passive and active copies within one array Guidance for deploying DAGs
17© Copyright 2014 EMC Corporation. All rights reserved. Exchange Virtualization
18© Copyright 2014 EMC Corporation. All rights reserved. Exchange 2010/2013 virtualization Virtualizing Exchange is supported on Hyper-V, VMware, and other hypervisors Hypervisor vendors must participate in the Windows Server Virtualization Validation Program (SVVP)Windows Server Virtualization Validation Program EMC recommends virtualizing Exchange for most deployments based on customer requirements
19© Copyright 2014 EMC Corporation. All rights reserved. Exchange virtualization Do not deploy VMs from the same DAG on the same host VM placement considerations Deploy VMs with the same role across multiple hosts DAG1 DAG2 DAG1 DAG2
20© Copyright 2014 EMC Corporation. All rights reserved. Exchange virtualization Physical sizing still applies – Hypervisor server must accommodate the guests they will support – DAG copies must be spread out across physical hosts to minimize outage in case of physical server issues Know your hypervisors limits – 256 SCSI disks per host (or cluster) – Processor limits (vCPUs per virtual machine) and Memory limits Be aware of the hypervisor CPU overhead – Microsoft Hyper-V: ~10-12% – VMware vSphere: ~5-7% Core Exchange design principles still apply – Design for performance and high availability – Design for user workloads Configuration best practices
21© Copyright 2014 EMC Corporation. All rights reserved. Exchange virtualization Hypervisor server – Have at least 4 paths (HBA/CNA/iSCSI) to the storage – Install EMC PowerPath for maximum throughput, load balancing, path management, and I/O path failure detection – Multiple NICs - Segregate management and clients traffic from Exchange replication traffic – Disable hypervisor-based auto tuning features - No dynamic memory CPU & Memory – Dedicate/reserve CPU and memory to the Mailbox virtual machines and do not over commit – pCPU to vCPU ratios: 2:1 is OK, 1:1 is a best practice VM migrations – Always migrate live or completely shut down virtual machines Configuration best practices – Hypervisor and VMs
22© Copyright 2014 EMC Corporation. All rights reserved. Exchange virtualization Exchange storage should be on spindles separate from guest OS physical storage Exchange storage must be block-level – Network attached storage (NAS) volumes are not supported – No NFS, SMB (other than SMB 3.0), or any other NAS technology – Storage must be fixed VHD/VHDX/VMDK, SCSI pass-through/RDM or iSCSI Configuration best practices - Storage
23© Copyright 2014 EMC Corporation. All rights reserved. Exchange virtualization Only in virtualized configurations VHDs can reside on SMB 3.0 shares presented to Hyper-V host No support for UNC path for Exchange db and log volumes (\\server\share\db1\db1.edb) Configuration best practices - SMB 3.0 Support
24© Copyright 2014 EMC Corporation. All rights reserved. Exchange virtualization Supported SMB 3.0 Configuration Example
25© Copyright 2014 EMC Corporation. All rights reserved. Exchange virtualization Virtual SCSI (pass-through or fixed disk) VHD on host – recommended for OS, program files Pass-through disk on host - recommended for Exchange database and log volumes iSCSI iSCSI direct from a guest virtual machine iSCSI initiator on host and disk presented to guest as pass-through ISCSI initiator from guest performs well and is easier to configure MPIO or EMC PowerPath – PowerPath recommended Configuration best practices – Hyper-V Storage
26© Copyright 2014 EMC Corporation. All rights reserved. Exchange virtualization VMFSRDM Volume can host many virtual machines (or can be dedicated to one virtual machine) Maps a single LUN to one virtual machine; isolated I/O Increases storage utilization, provides better flexibility, easier administration, and management More LUNs = easier to hit the LUN limit of 256 that can be presented to ESX Server Can’t have hardware enabled VSS backupsRequired for hardware VSS and replication tools that integrate with Exchange databases Large third-party ecosystem with V2P products to aid in certain support situations Can help reduce physical to virtual migration time Not supported for shared-disk clusteringRequired for shared-disk clustering Full support for VMware Site Recovery Manager Configuration best practices – VMware VMFS or RDM Trade-offs
27© Copyright 2014 EMC Corporation. All rights reserved. Exchange virtualization For Hyper-V: – Best Practices for Virtualizing Exchange Server 2010 with Windows Server 2008 R2 Hyper-V Best Practices for Virtualizing Exchange Server 2010 with Windows Server 2008 R2 Hyper-V – Best Practices for Virtualizing and Managing Exchange 2013 Best Practices for Virtualizing and Managing Exchange 2013 For VMware: – Microsoft Exchange 2010 on VMware Best Practices Guide Microsoft Exchange 2010 on VMware Best Practices Guide – Microsoft Exchange 2010 on VMware Design and Sizing Examples Microsoft Exchange 2010 on VMware Design and Sizing Examples – Microsoft Exchange 2013 on VMware Best Practices Guide Microsoft Exchange 2013 on VMware Best Practices Guide – Microsoft Exchange 2013 on VMware Availability and Recovery Options Microsoft Exchange 2013 on VMware Availability and Recovery Options – Microsoft Exchange 2013 on VMware Design and Sizing Guide Microsoft Exchange 2013 on VMware Design and Sizing Guide References
28© Copyright 2014 EMC Corporation. All rights reserved. Exchange Storage Design
29© Copyright 2014 EMC Corporation. All rights reserved. Exchange Storage Options Understand which storage type best meets design requirements −Physical or virtual? −Dedicated for Exchange or shared with other applications? Follow EMC proven guidance for each platform DAS or SAN? EMC offers both options For small, low-cost = DAS For large-scale efficiency = SAN Best long-term TCO = SAN Virtualization ready = SAN DAS or SAN? EMC offers both options For small, low-cost = DAS For large-scale efficiency = SAN Best long-term TCO = SAN Virtualization ready = SAN VNXe VNX VMAX XtremIO
30© Copyright 2014 EMC Corporation. All rights reserved. Exchange Server IOPS Per Disks Use the following table for IOPS per drive values when calculating disk requirements for Exchange 2010/2013* Disk type Exchange 2010/2013 database IOPS per disk (random workload) Exchange Server 2010/2013 database logs IOPS per disk (Sequential workload) VNX/VMAXVNXVMAXVNX and VMAX 7.2 K rpm NL-SAS/SATA K rpm SAS/FC K rpm SAS/FC Flash *Recommendations may change based on future test results
31© Copyright 2014 EMC Corporation. All rights reserved. I/O Characteristics for Various RAID Types I/O characteristicsRAID 1/0RAID 5RAID 6 Random I/O ReadExcellent WriteExcellentModeratePoor Sequential I/O ReadExcellentGood WriteExcellentModerate RAID write overhead246 Disk capacity utilization 1 1/24/5 (in 4+1 R5)4/6 (in 4+2 R6) Minimal drives required Depends on the size of RAID group 2 Depends on the array
32© Copyright 2014 EMC Corporation. All rights reserved. Exchange Server Design Methodology
33© Copyright 2014 EMC Corporation. All rights reserved. Exchange Storage Design Exchange building-block design methodology What is a building-block? A building-block represents the required amount of resources needed to support a specific number of Exchange users on a single server or VM Building blocks are based on requirements and include: Compute requirements (CPU, memory, and network) Disk requirements (database, log, and OS) Why use the building-block approach? Can be easily reproduced to support all users with similar user profile characteristics Makes Exchange environment additions much easier and straightforward, helpful for future environment growth Has been very successful for many real-world customer implementations See Appendix for building-block design process
34© Copyright 2014 EMC Corporation. All rights reserved. Exchange Storage Design Microsoft Exchange Server Role Requirements Calculator Exchange 2010: Exchange 2013: EMC Exchange Designer: https://community.emc.com/docs/DOC ?et=watches. .document https://community.emc.com/docs/DOC ?et=watches. .document VSPEX Sizing Tool: Specific array sizing tools, i.e. VNX Disksizer Perform manual calculations (for advanced administrators) Exchange Sizing Tools options
35© Copyright 2014 EMC Corporation. All rights reserved. Exchange Storage Design Exchange JetStress for Storage Validation Exchange Exchange Exchange Load Generator (Loadgen) for end-to-end environment validation (must be used in isolated lab only) Exchange Exchange Tools for Performance and Scalability Evaluation
36© Copyright 2014 EMC Corporation. All rights reserved. Storage Design validation Exchange Solution Reviewed Program (ESRP) Results Microsoft program for validation of Storage vendor designs with Exchange Vendor runs multiple JetStress tests based on requirements for performance, stress, backup to disk, and log file replay Reviewed and approved by Microsoft
37© Copyright 2014 EMC Corporation. All rights reserved. Exchange Storage Design Exchange Jetstress −Uses Exchange executables to simulate I/O load (use same version) −Initialized and executed during pre-production before Exchange Server is installed −Throughput and mailbox profile tests – Pass gives confidence that storage design will perform as designed Exchange Load Generator (Loadgen) (optional) −Validation must be performed in isolated lab −Produces a simulated client workload against a test Exchange deployment −Estimate number of users per server and validate Exchange deployment −LoadGen testing can take many weeks to configure and populate DBs Tools for Performance and Scalability Evaluation
38© Copyright 2014 EMC Corporation. All rights reserved. Exchange Storage Design Do not solely rely on automated tools when sizing your Exchange environment Place time and effort into your calculations, and provide supporting factual evidence on your designs rather than providing fictional calculations Size Exchange based on I/O, mailbox capacity and bandwidth requirements Factor in other overhead variables such as archiving, snapshots protection, virus protection, mobile devices, and risk factor Confirm Exchange storage requirements with specific array sizing tools Storage sizing guidance
39© Copyright 2014 EMC Corporation. All rights reserved. Storage Design Guidance Isolate the Exchange server workload to its own set of spindles from other workloads to guarantee performance When sizing, always calculate I/O requirements and capacity requirements Separate the database and logs onto different volumes Deploy DAG copies on separate physical spindles Databases up to 2 TB in size are acceptable when DAG is being used: −The exact size should be based or customer requirements −Ensure that your solution can support LUNs larger than 2 TB Best Practices
40© Copyright 2014 EMC Corporation. All rights reserved. Storage Design Guidance Consider backup and restore times when calculating the database size Spread the load as evenly as possible across array resources, V-Max Engines, VNX SPs, back-end buses, etc. Always format Windows NTFS volumes for databases and logs with an allocation unit size of 64K Use an Exchange building block design approach whenever possible Best Practices - continued
41© Copyright 2014 EMC Corporation. All rights reserved. Storage Design Guidance - VNX Either method works well and provides the same performance (thick pools versus RGs) RAID groups are limited to 16 disks per RG, pools can support many more disks Pools are more efficient and easier to manage Use pools if planning to use advanced features such as: −FAST VP, VNX Snapshots Storage pools can support a single building block or multiple building blocks based on customer requirements Design and expand pools using the correct multiplier for best performance (R1/0 4+4, R5 4+1, R6 6+2) Pools and RAID Groups
42© Copyright 2014 EMC Corporation. All rights reserved. Storage Design Guidance - VNX Both Thick and Thin LUNs can be used for Exchange storage (database and logs) Thick LUNs are recommended for heavy workloads with high IOPS user profiles Thin LUNs are recommended for light to medium workloads with low IOPS user profiles – Benefits: significantly reduces initial storage requirements – Use VNX Pool Optimizer before formatting volumes – Can enable FAST Cache or FAST VP for fast metadata promotions Thick or Thin LUNs?
43© Copyright 2014 EMC Corporation. All rights reserved. FAST VP and FAST Cache FAST VPFAST Cache A VMAX and VNX feature that automates the identification of data for allocating or reallocating across various performance and capacity tiers within the storage array A VNX performance optimization feature that provides performance boost to frequently accessed data by leveraging the use of flash drives to extend cache capacities FCFC Exchange SQL Server SharePoint Virtual Server SAS NL SAS Flash FAST Cache FAST VP Exchange SQL Server SharePoint Virtual Server
44© Copyright 2014 EMC Corporation. All rights reserved. FAST VP vs. FAST Cache on VNX Storage FAST VPFAST Cache Leverages pools to provide sub-LUN tiering, enabling the utilization of multiple tiers of storage Simultaneously. Enables flash drives to extend the existing caching capacity of the storage system. Uses 1 GB chunks (256 MB in Next-Gen VNX).Uses 64 KB chunks. Local feature – per storage pool. Assured performance per pool. Global feature – per storage array. Shared resource, performance for one pool is not guaranteed under FAST Cache performance contention. Moves data between different storage tiers based on a weighted average of access statistics collected over a period of time. Copies data from hard disks to flash disks when accessed frequently. Uses a relocation window to periodically make storage tiering adjustments. Default setting is an 8- hour relocation window each day. Adapts continuously to changes in workload. While it can improve performance, it is primarily designed to improve usability and reduce TCO. Designed primarily to improve performance.
45© Copyright 2014 EMC Corporation. All rights reserved. VNX Considerations for FAST VP and FAST Cache When the number of flash drives is limited, use flash drives to create FAST Cache first –FAST Cache can benefit multiple pools in the storage system. –FAST Cache uses 64 KB chunks, smaller than 1 GB or 256 MB chunks in FAST VP, which results in higher performance benefits and faster reaction time for changing usage patterns. Use flash drives to create the FAST VP performance tier for a specific pool –This ensures the performance of certain mission-critical data –The FAST VP tier is dedicated to a storage pool and cannot be shared with other storage pools in the same storage array.
46© Copyright 2014 EMC Corporation. All rights reserved. Configuration recommendations (VNX and VMAX) Exchange Design with FAST VP Separate databases from logs, due to different workloads –Data – random workload with skew; high FAST VP benefit –Logs – sequential data without skew; no FAST VP benefit Use dedicated pools –Provides a better SLA guarantee –Provides fault domains –Recommended for most deterministic behavior Use Thick Pool LUNs for highest performance (on VNX) –Thin Pool LUNs are acceptable with optimization Use Thin LUNs on VMAX
47© Copyright 2014 EMC Corporation. All rights reserved. Tools for FAST VP Tier Advisor for sizing –Historical performance data is needed from storage arrays. Workload Performance Assessment Tool –It shows FAST VP heat map. For more information, refer to https://emc.mitrend.com. https://emc.mitrend.com VSPEX Sizing Tool (for VNX) –For more information, refer to ebook/vspex-solutions.htm.http://www.emc.com/microsites/vspex- ebook/vspex-solutions.htm EMC Professional Services and qualified partners can assist in properly sizing tiers and pools to maximize investment.
48© Copyright 2014 EMC Corporation. All rights reserved. VNX only Exchange Design with FAST Cache FAST Cache usage –Pools with Thin LUNs for metadata tracking –Pools with Thin and Thick LUNs when VNX Snapshots are used –Pools with Thick LUNs ▪Not required but not restricted either ▪Required with VNX Snapshots FAST Cache Sizing guidance –Rule of thumb: for every 1 TB of Exchange dataset, provision 1 GB of FAST Cache ▪Monitor and adjust the FAST Cache size, your mileage may vary ▪Enable FAST Cache on pools with database LUNs only
49© Copyright 2014 EMC Corporation. All rights reserved. Exchange Storage design - VMAX Ensure that the initial disk configurations can support the I/O requirements Can configure a thin pool to support a single Exchange building block or multiple building blocks, depending on customer requirements Use Unisphere for VMAX to monitor the thin pool utilization and prevent the thin pools from running out of space Install the Microsoft hotfix KB on the Windows Server 2012 hosts in your environment.KB Design Best Practices
50© Copyright 2014 EMC Corporation. All rights reserved. Exchange Storage design - VMAX Use Symmetrix Virtual Provisioning Can share database and log volumes across the same disks, but separate them into different LUNs on the same hosts For optimal Exchange performance, use striped meta volumes Design Best Practices
51© Copyright 2014 EMC Corporation. All rights reserved. VMAX FAST VP with Exchange When designing FAST VP for Exchange 2010/2013 on VMAX follow these guidelines: – Separate databases and logs onto their own volumes Can share database and log volumes across the same disks – Exclude transaction log volumes from the FAST VP policy or pin all the log volumes into the tier on which they are created – Select Allocate by FAST Policy to allow FAST VP to use all tiers for new allocations based on the performance and capacity restrictions New feature introduced in the Enginuity™ 5876 code – When using FAST VP with Exchange DAG, do not place DAG copies of the same database in the same pool on the same disks Design Best Practices
52© Copyright 2014 EMC Corporation. All rights reserved. XtremCache with Exchange Consider XtremCache for Exchange if: – You have an I/O bound Exchange solution – You are not sure about anticipated workload – You need to guarantee high performance and low latency for specific users (VIP servers, databases, and so on) XtremCache is proven to improve Exchange 2010 performance by: – Reducing read latencies – Increasing I/O throughput – Eliminating almost all high latency spikes – Providing more improvements as workload increases – Reducing RPC latencies – Reducing writes to the back-end storage with XtremCache deduplication
53© Copyright 2014 EMC Corporation. All rights reserved. XtremCache with Exchange XtremCache PCI Flash card can be installed on – A physical Exchange Mailbox server – Hypervisor server hosting Exchange Mailbox virtual machines (VMware or Hyper-V) Enable XtremCache acceleration only on database volumes only – Do not enable on log volumes – sequential workload=no performance benefits XtremCache sizing guidance: For a 1,000 GB working dataset, configure 10 GB of XtremCache device Configuration recommendations
54© Copyright 2014 EMC Corporation. All rights reserved. XtremCache with Exchange When implementing XtremCache with VMware vSphere, consider the following: – Size of the PCI cache card to deploy – Number of Exchange virtual machines deployed on each vSphere host that will be using XtremCache – Exchange workload characteristics (read:write ratio, user profile type) – Exchange dataset size The most benefits will be achieved when all reads from a working dataset are cached Configuration recommendations
55© Copyright 2014 EMC Corporation. All rights reserved. XtremCache with Exchange When adding a XtremCache device to an Exchange virtual machine: – Set cache page to 64KB and Max IO size to 64 (BDM I/O will not be cached) – Can use VSI Plug-in or XtemCache CLI command to set the cache page size to 64 KB and max I/O size to 64 KB when adding the cache device to a virtual machine: vfcmt add -cache -set_page_size 64 -set_max_io_size 64) Configuration recommendations
56© Copyright 2014 EMC Corporation. All rights reserved. XtremCache with Exchange Evaluate your workload before considering enabling deduplication for accelerated Exchange LUNs Consider CPU overhead when enabling deduplication Set the deduplication ratio based on workload characteristics: – If the observed deduplication ratio is less than 10%, EMC recommends that you turn it off (or set it to 0%), which enables you to benefit from extended cache device life. – If the observed ratio is over 35%, EMC recommends that you raise the deduplication gain to match the observed deduplication. – If the observed ratio is between 10% and 35%, EMC recommends that you leave the deduplication gain as it is. Configuration recommendations (deduplication)
57© Copyright 2014 EMC Corporation. All rights reserved. Exchange DR Options
58© Copyright 2014 EMC Corporation. All rights reserved. EMC’s Common Solutions for Exchange DR Exchange DR Options Replication MethodBest for Stretched (cross-site) DAG Native Exchange host- based replication Small environments, local replication Third Party Replication with Manual Exchange Recovery (database portability) EMC RecoverPoint or SRDF Mixed environments with large workloads and strict SLAs Third Party Replication with Automated Exchange Recovery EMC RecoverPoint or SRDF with VMware SRM VMware shops with large workloads and strict SLAs
59© Copyright 2014 EMC Corporation. All rights reserved. Replication Matrix FeaturesSRDF/SSRDF/AMV/SMV/A RecoverPoint Sync RecoverPoint Async SYNC-APIDAG Replication TechnologyArray SAN Host Heterogeneous storage supportNo Yes Heterogeneous applications supportYes No Active Bi-DirectionalYes Latency Impact to applicationsMediumMinimumMediumMinimum High Data replication TypeSynchAsyncSyncAsyncSyncAsyncSyncAsynch Automated RestartYes Coexistence with VSS replicationYes NoYes Zero data loss RPO = 0 YesNoYesNoYesNoYesNo Time to recover RTO Minutes Seconds Minutes Replication intervalContinuous Continuous IO Pools Continuous Continuous IO Pools ContinuousLog Shipping Replication distance200kmunlimited200kmunlimited200kmunlimited200km Data center Unlimited Ability to resynchronize data incrementallyYes No Link Cost RequirementMediumLowMediumLow MediumHigh
60© Copyright 2014 EMC Corporation. All rights reserved. Exchange Validated Solutions Exchange 2013 ESRP Exchange with XtremCache Cross-site DAD vs. RecoverPoint Automated DR with RecoverPoint and VMware SRM VSPEX Solution Cloud Solutions with EMC Hybrid Cloud
61© Copyright 2014 EMC Corporation. All rights reserved. Exchange 2013 ESRP on VNX5700
62© Copyright 2014 EMC Corporation. All rights reserved. Exchange with XtremCache Solution
63© Copyright 2014 EMC Corporation. All rights reserved. Cross-site DAG vs. RecoverPoint
64© Copyright 2014 EMC Corporation. All rights reserved. Automated DR with RecoverPoint and SRM
65© Copyright 2014 EMC Corporation. All rights reserved. VSPEX Solutions for Exchange
66© Copyright 2014 EMC Corporation. All rights reserved. Exchange with EMC Hybrid Cloud
67© Copyright 2014 EMC Corporation. All rights reserved. Exchange Resources Exchange Storage Best Practices and Design Guidelines for EMC Storage whitepaper: design-guid-emc-storage.pdf EMC Community Network −https://community.emc.com/community/connect/everything_microsofthttps://community.emc.com/community/connect/everything_microsoft EMC and Partner Exchange 2010 Tested Virtualized Solutions –http://technet.microsoft.com/en-us/library/gg aspxhttp://technet.microsoft.com/en-us/library/gg aspx –http://www.emc.com/collateral/hardware/white-papers/h7337-exchange-unified-cisco-hyper-v- wp.pdfhttp://www.emc.com/collateral/hardware/white-papers/h7337-exchange-unified-cisco-hyper-v- wp.pdf –http://www.emc.com/collateral/software/white-papers/h7410-zero-data-loss-exchange-wp.pdfhttp://www.emc.com/collateral/software/white-papers/h7410-zero-data-loss-exchange-wp.pdf Exchange Solution Reviewed Program Submissions (ESRP) –http://technet.microsoft.com/en-us/exchange/ff aspxhttp://technet.microsoft.com/en-us/exchange/ff aspx Exchange Mailbox Server Storage Design (Microsoft TechNet) –http://technet.microsoft.com/en-us/library/dd aspxhttp://technet.microsoft.com/en-us/library/dd aspx
68© Copyright 2014 EMC Corporation. All rights reserved. Additional References Exchange virtualization supportability guidance - Understanding Exchange Performance - Server Virtualization Validation Program - Exchange 2010 EMC-tested OEM solutions (on Hyper-V) – 20,000 users on EMC storage with virtual provisioning – 32,400 users on EMC storage with EMC REE us/library/hh145600(v=exchg.141).aspxhttp://technet.microsoft.com/en- us/library/hh145600(v=exchg.141).aspx
69© Copyright 2014 EMC Corporation. All rights reserved. ESI for VNX Pool Optimization Tool
70© Copyright 2014 EMC Corporation. All rights reserved. ESI For VNX Pool Optimization Tool ESI for VNX Pool Optimization (formerly known as the SOAP tool) improves thick and thin LUN performance by ensuring a balanced allocation of data across all available disks and also by optimizing the access of that data on an ongoing basis. It currently supports only the VNX Next Generation Series Storage Arrays. For older VNX platforms, customers are advised to use the original SOAP tool. More details about ESI for VNX Pool Optimization are available here – Product Download: https://download.emc.com/downloads/DL50658_Storage- Integrator-(ESI)-for-VNX-Pool-Optimization-tool.ziphttps://download.emc.com/downloads/DL50658_Storage- Integrator-(ESI)-for-VNX-Pool-Optimization-tool.zip – Release Notes: https://support.emc.com/docu50668_EMC_Storage_Integrator_for_VNX_Pool_Optim ization_Tool_Release_Notes.pdf?language=en_US https://support.emc.com/docu50668_EMC_Storage_Integrator_for_VNX_Pool_Optim ization_Tool_Release_Notes.pdf?language=en_US
71© Copyright 2014 EMC Corporation. All rights reserved. What Does This Tool Do? The tool optimizes pool-based LUNs by pre- allocating slices in the pool evenly across all disks, private raid groups and LUNs Provides the best option for any application requiring deterministic high performance across all LUNs in the pool equally
72© Copyright 2014 EMC Corporation. All rights reserved. When To Use The Optimization Tool When maximum application performance is required To achieve the best performance for pool-based LUNs (primarily thin) To eliminate performance issues and successfully pass Exchange Jetstress during Exchange pre-deployment storage validation To mitigate “Jetstress effect” Applications to benefit from using the tool: Microsoft Exchange Microsoft SQL Server Oracle
73© Copyright 2014 EMC Corporation. All rights reserved. Jetstress Initialization Process How Jetstress initialization phase works: Jetstress creates first database It then creates other databases by copying the first database to other databases concurrently
74© Copyright 2014 EMC Corporation. All rights reserved. What is the “JetStress effect” Jetstress initialization process (data population) results in imbalances of underlying virtual disks in a pool How is the issue surfaced? – With Jetstress testing first database on the Exchange server will: Experience higher latencies then the others when the LUN is Thick Experience lower latencies then the others when the LUN is Thin
75© Copyright 2014 EMC Corporation. All rights reserved. Looking under the covers… Slice Maps Without Optimization With Optimization
76© Copyright 2014 EMC Corporation. All rights reserved. Prerequisites VNX OE for Block Release 33 SP1 or later Before using the tool, LUNs must be created using ESI PowerShell with specific parameters in order for the tool to optimize the LUNs* All LUNs in the pool must be the same size All LUNs in the pool must be optimized at the same time *It is also possible to use NaviSecCLI to create LUNs using undocumented black content switches
77© Copyright 2014 EMC Corporation. All rights reserved. Options for Thick pool LUNs provisioning Two options for thick pool LUNs provisioning 1.For good and optimal performance – No SOAP is necessary. Use default pool LUNs provisioning via Unisphere, NaviSecCLI, EMC ESI, or EMC VSI 2.For best performance (max IOPS) – Use NaviSecCLI to disable pre-provisioning and then run SOAP Turn off pre-provisioning via the CLI Run SOAP Re-enable pre-provisioning VNX OE for Block Release 32 (Inyo) and later
78© Copyright 2014 EMC Corporation. All rights reserved. SOAP Utility for VNX R32– Where and how? Old SOAP Utility is available on EMC Online Support site – Enter “soap” in the search and select “Support Tools” Must be used with CX4/VNX Inyo (OE 5.32) only – Support Thick LUN optimization only Zip file contains the tool, step-by-step documentation, and demo video
79© Copyright 2014 EMC Corporation. All rights reserved. Building Block Design Example
80© Copyright 2014 EMC Corporation. All rights reserved. Exchange Mailbox Server Storage Design Methodology
81© Copyright 2014 EMC Corporation. All rights reserved. Requirements Example ItemValue Exchange version. Total number of active users (mailboxes) in Exchange environment Exchange 2013, 20,000 Site resiliency requirementsSingle site Storage InfrastructureSAN Type of deployment (Physical or Virtual)Virtual (VMware vSphere) HA requirementsOne DAG with two database copies Mailbox size limit2 GB max quota User profile200 messages per user per day (0.134 IOPS) Target average message size75 KB Outlook modeCached mode, 100 percent MAPI Number of mailbox servers8 Number of mailboxes per server5,000 (2,500 active/2,500 passive) Number of databases per server10 Number of users per database500 Deleted items retention (DIR) period14 days Log protection buffer (to protect against log truncation failure)3 days BDM configurationEnabled 24 x7 Database read/write ratio3:2 (60/40 percent) in a DAG configuration User concurrency requirements100 percent Third-party software that affects space or I/O (for example, Blackberry, snapshots) Storage snapshots for data protection Disk Type3 TB NL-SAS (7,200 rpm) Storage platformVNX
82© Copyright 2014 EMC Corporation. All rights reserved. Building Block design In our example we are defining a building block as: – A mailbox server that will support 5,000 users 2,500 users will be active during normal runtime and the other 2,500 users will be passive until a switchover from another mailbox server occurs. Each building block will support two database copies. Define and design Building Block
83© Copyright 2014 EMC Corporation. All rights reserved. Building block sizing and scaling process Perform calculations for IOPS requirements Perform calculations for capacity requirements based on different RAID types Determine the best option Scale building block – Multiple building blocks may be combined together to create the final configuration and storage layout (pools or RGs)
84© Copyright 2014 EMC Corporation. All rights reserved. Building block sizing and scaling process Front-end IOPS ≠ Back-end IOPS –Front-end IOPS = Total Exchange Mailbox server IOPS –Back-end IOPS = Storage array IOPS (including RAID penalty) Understand disk IOPS by RAID type –Block front-end Exchange application workload is translated into a different back-end disk workload based on the RAID type in use. –For reads there is no impact of RAID type: ▪1 application read I/O = 1 back-end read I/O –For random writes like Exchange: ▪RAID 1/0: 1 application write I/O = 2 back-end write I/O ▪RAID 5: 1 application write I/O = 4 back-end disk I/O (2 read I/O + 2 write I/O) ▪RAID 6: 1 application write I/O = 6 back-end write I/O (3 read I/O + 3 write I/O)
85© Copyright 2014 EMC Corporation. All rights reserved. Formula & Calculations Database IOPS requirements Total transactional IOPS = IOPS per mailbox * mailboxes per server + (Microsoft recommended overhead %) Total transactional IOPS = 5,000 users * IOPS per user + 20% Microsoft recommended overhead = = 804 IOPS Total front-end IOPS = (Total transactional IOPS) + (EMC required overhead %) Total Front-end IOPS = % EMC required overhead = 965 IOPS (rounded-up from 964.8)
86© Copyright 2014 EMC Corporation. All rights reserved. Formula Database Disks requirements for Performance (IOPS) Disks required for Exchange database IOPS = (Total backend database Read IOPS) + (Total backend database Write IOPS)/ Exchange random IOPS per disk Where: Total back-end database read IOPS = (Total Front-end IOPS) * (% of Reads IOPS) Total back-end database write IOPS = RAID Write Penalty *(Total Front-end IOPS * (% of Write IOPS)
87© Copyright 2014 EMC Corporation. All rights reserved. Calculations Database Disks requirements for Performance (IOPS) RAID Option RAID Penalty Disks required RAID 1/0 (4+4)2 (965 x 0.60) + 2(965 x 0.40) = = 1351 / 65 = 21 (round-up to 24 disks) RAID 5 (4+1)4 (965 x 0.60) + 4(965 x 0.40) = = 2123 / 65 = 33 (round-up to 35 disks) RAID 6 (6+2)6 (965 x 0.60) + 6(965 x 0.40) = = 2895 / 65 = 45 disks (round-up to 48 disks)
88© Copyright 2014 EMC Corporation. All rights reserved. Formula & Calculations Transactional logs IOPS requirements Disks required for Exchange log IOPS = (Total backend database Write IOPS * 50%) + (Total backend database Write IOPS * 10%)/ Exchange sequential IOPS per disk Disks required for Exchange log IOPS = (772 back-end write IOPS * 50%) + (772 *10%))/ 180 sequential Exchange IOPS per disk = ( )/180 = 2.57(round-up to 4 disks)
89© Copyright 2014 EMC Corporation. All rights reserved. Formula Storage capacity calculations Calculate User Mailbox on Disk Calculate Database Size on Disk Calculate Database LUN Size Mailbox size on disk = Maximum mailbox size + White space + Dumpster Database size on disk = number of mailboxes per database * mailbox size on disk Database LUN size = Number of mailboxes * Mailbox size on disk * (1 + Index space + additional Index space for maintenance) / (1 + LUN free space)
90© Copyright 2014 EMC Corporation. All rights reserved. Formula Mailbox size on disk Mailbox size on disk = Maximum mailbox size + White space + Dumpster Where: Estimated Database Whitespace per Mailbox = per-user daily message profile * average message size Where: Dumpster = (per-user daily message profile * average message size * deleted item retention window) + (mailbox quota size * 0.012) + (mailbox quota size * 0.03)
91© Copyright 2014 EMC Corporation. All rights reserved. Calculations Mailbox size on disk White space = 200 messages /day * 75KB = 14.65MB Dumpster = (200 messages/day * 75KB * 14 days) + (2GB * 0.012) + (2GB x 0.03) = = MB Mailbox size on disk = 2GB mailbox quota MB database whitespace MB Dumpster = 2,354 MB (2.3GB)
92© Copyright 2014 EMC Corporation. All rights reserved. Calculations Database Size On Disk & LUN size Database size on disk = 500 users per database * 2,354 MB mailbox on disk = 1,177 GB (1.15 TB) Database LUN size = 1,177 GB * ( ) / ( ) = 2,060 (2 TB) In our example: –20% added for the Index –20% added for the Index maintenance task –20% added for LUN-free space protection
93© Copyright 2014 EMC Corporation. All rights reserved. Formula & Calculations Logs space calculations Log LUN size = (Log size)*(Number of mailboxes per database)*(Backup/truncation failure tolerance days)+ (Space to support mailbox moves)/(1 + LUN free space) Log Capacity to Support 3 Days of Truncation Failure = (500 mailboxes/database x 40 logs/day x 1MB log size) x 3 days = 58.59GB Log Capacity to Support 1% mailbox moves per week = 500 mailboxes/database x 0.01 x 2.3GB mailbox size = 11.5GB Log LUN size = 58.59GB GB /( ) = GB (round-up to 88 GB)
94© Copyright 2014 EMC Corporation. All rights reserved. Total Capacity per Building Block LUN Capacity TypeLUN Capacity Required per server Database LUN capacity2,060 GB per LUN * 10 LUNs per server = 20,600 GB Log LUN capacity88 GB per LUN * 10 LUNs per server = 880 GB Total LUN capacity per server 20, = 21,480 GB Total LUN size capacity required per server = (Database LUN size per server) + (Log LUN size per server) * (Number of databases per server)
95© Copyright 2014 EMC Corporation. All rights reserved. Total number of disks required Database disks Logs disks Disks required for Exchange database capacity = Total database LUN size / Physical Disk Capacity * RAID Multiplication Factor Disks required for Exchange log capacity = Total log LUN size) / Physical Disk Capacity * RAID Multiplication Factor
96© Copyright 2014 EMC Corporation. All rights reserved. Disk requirements based on capacity RAID OptionDatabase Disks required RAID 1/0 (4+4)20,600/ * 2 = 7.37 * 2 = (round-up to 16 disks) RAID 5 (4+1)20,600/ * 1.25 = 7.37 * 1.25 = 9.2 (round-up to 10 disks) RAID 6 (6+2)20,600/ * 1.33 = 7.37 * 1.33 = 9.8 (round-up to 16 disks) RAID OptionLogs Disks required RAID 1/0 (1+1)880 / 2,794.5 * 2 = 0.63 (round up to 2 disks)
97© Copyright 2014 EMC Corporation. All rights reserved. Building Block Summary Final storage calculation results Volume TypeRAID Option Disks Required for Performance (IOPS) Disks Required for Capacity Best Option Exchange Databases RAID 1/0 (4+4)24 disks16 disks24 disks RAID 5 (4+1)35 disks10 disks RAID 6 (6+2)48 disks16 disks Exchange LogsRAID 1/0 (1+1)4 disks2 disks4 disks Total disks per building block28 disks
98© Copyright 2014 EMC Corporation. All rights reserved. Building Block Scalability Final storage calculation results Total number of disks required for entire 20,000 users solution in a DAG with two copies = 28 disk per building block * 8 building blocks = 224 disks total
99© Copyright 2014 EMC Corporation. All rights reserved. Bandwidth calculations Building block sizing and scaling process Array throughput MB/s validation for Exchange involves: Determining how many databases the customer will require Confirming the database LUNs are evenly distributed among the backend busses and storage processors. Determine if each bus can accommodate the peak Exchange database throughput Use this calculation to calculate the throughput required (DB throughput * number of DBs per bus) = Exchange DB throughput Compare that number with array bus throughput DB throughput = Total transactional (user) IOPS per DB * 32K + (BDM throughput per DB in MB/s) Number of DBs per bus = the total number of active and passive databases per bus
100© Copyright 2014 EMC Corporation. All rights reserved. The process Storage Bandwidth Requirements The bandwidth validation process involves the following steps: 1.Determine how many databases in the Exchange environment 2.Determine the bandwidth requirements per database 3.Determine the required bandwidth requirements per array bus 4.Determine whether each bus can accommodate the peak Exchange database bandwidth Use DiskSizer for VNX or contact your local storage specialist to get the array and bus throughput numbers DiskSizer is available through your local USPEED contact 5.Evenly distribute database LUNs among the back-end buses and storage processors Uniformed distribution is key for best performance FE/BE/RAID Group/POOLs & DAEs DBs uniformly distributed onto the pools Use even numbers on the SAS loops (0 & 2) for max performance
101© Copyright 2014 EMC Corporation. All rights reserved. Calculations Storage Bandwidth Requirements Bandwidth per database (MB/s) = Total transactional IOPS per database * 32 KB + Estimated BDM Throughput per database (MB/s) Where: 32 KB is an Exchange page size Estimated BDM throughput per database is 7.5 MB/s for Exchange 2010 and 2.25 MB/s for Exchange 2013 Required throughput MB/s per bus = (throughput MB/s per database) * (total number of active and passive databases per bus)
102© Copyright 2014 EMC Corporation. All rights reserved. Calculations Storage Bandwidth Requirements Total transactional IOPS per database = (500 * * 32 KB = 2.1 MB/s Throughput per database = 2.1 MB/s MB/s = 4.35 MB/s Required throughput per bus = 4.35 MB/s * 200 databases per bus = 870 MB/s Example assumptions: 500 users at IOPS per database 200 databases per bus If the array supports a maximum throughput of 3,200 MB/s per bus, 200 databases can be supported from a throughput perspective.
103© Copyright 2014 EMC Corporation. All rights reserved. Configured dedicated storage pools for each mailbox server with 24 x 3 TB NL-SAS drives. Each storage pool holds two copies from different mailbox servers. Separated Exchange log files into different storage pools For better storage utilization created one storage pool with 16 x 3 TB NL- SAS drives for logs per four mailbox server building blocks. Final Design Example
104© Copyright 2014 EMC Corporation. All rights reserved. Exchange Archiving
105© Copyright 2014 EMC Corporation. All rights reserved. Archiving – Native vs. EMC SourceOne Archiving CapabilitiesExchange 2013EMC SourceOne NameIn-Place ArchivingComprehensive management capabilities Consistent & automated policy-based with proper retention and disposition Full-text indexing of attachmentsLimited to few file typesSupport many file types Single-instance, de-duplication and compression capabilities Multiple content types ( , SharePoint, files) Offline Access Limitation In-place archiving is not accessible in offline mode Access from non-Microsoft DeviceNot available Doesn’t Required Exchange enterprise CAL license Doesn’t required In-place Exchange Migration Search results between online and offline Inconsistent as archived s are not searchable offline consistent Archiving policyBasic Advanced - based on many other parameters like for example based word in subject field, specific outlook folder, with attachment or no, attachment format, read/unread message and etc….
106© Copyright 2014 EMC Corporation. All rights reserved. Archiving – Native vs. EMC SourceOne eDiscovery CapabilitiesExchange 2013EMC SourceOne Comprehensive eDiscovery CapabilitiesLimitedComprehensive eDiscovery Legal holdLimitedUp to lower level (single level) Assign Custodians Legal hold based on time frame of content Limited Supported File types for Indexing 54 file types – limits the keyword search result 400 file types – accurate keyword search result Proper eDiscovery Workflow (assessment, culling, review and tagging then holding) Message Tagging Message distribution among reviewers Run Complex Search Query BCC Field Search
1© Copyright 2013 EMC Corporation. All rights reserved. ACCELERATING MICROSOFT EXCHANGE PERFORMANCE WITH EMC XtremSW Cache EMC VNX Storage and VMware vSphere.
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Module 9 Planning a Disaster Recovery Solution. Module Overview Planning for Disaster Mitigation Planning Exchange Server Backup Planning Exchange Server.
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1EMC CONFIDENTIAL—INTERNAL USE ONLY FAST VP and Exchange Server 2010 Don Turner Consultant Systems Integration Engineer Microsoft TPM.
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Chapter 8 Implementing Disaster Recovery and High Availability Hands-On Virtual Computing.
Copyright © 2014 EMC Corporation. All Rights Reserved. Block Storage Provisioning and Management Upon completion of this module, you should be able to:
Module 7 Implementing High Availability. Module Overview Overview of High Availability Options Configuring Highly Available Mailbox Databases Deploying.
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Module 8 Implementing Backup and Recovery. Module Overview Planning Backup and Recovery Backing Up Exchange Server 2010 Restoring Exchange Server 2010.
Copyright © 2014 EMC Corporation. All Rights Reserved. Advanced Storage Concepts Upon completion of this module, you should be able to: Describe LUN Migration.
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CommVault Media Management - Overview. Single Management Console CommServe Management Server and OEM SQL DB Windows Only Client/Application Agents (iDA)
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Microsoft Virtual Server 2005 Product Overview Mikael Nyström – TrueSec AB MVP Windows Server – Setup/Deployment Mikael Nyström – TrueSec AB MVP Windows.
Intro to SharePoint 2013 Architecture Liam Cleary.
Microsoft ® Exchange Server 2010 with Service Pack 1 Infrastructure Planning and Design Published: December 2010 Updated: July 2011.
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