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Veeam Backup & Replication: Tips and Tricks

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1 Veeam Backup & Replication: Tips and Tricks
SPO3292 Veeam Backup & Replication: Tips and Tricks Anton Gostev Veeam Software @Gostev Doug Hazelman Veeam Software @VMDoug #vmworldsponsor

2 Quick Overview of v6 Architecture
Backup servers Backup proxy servers Backup repositories “Automated everything” Intelligent load balancing Centralized management via Enterprise Manager

3 This illustrates how intelligent load balancing works

4 Scaling your backups 3 simple rules

5 Scaling your backups Keep the management server happy
Disable default proxy (requires 6.1 or later) Allocate enough RAM for job manager processes Keep concurrent (running) jobs under 100 per management server Backup proxy servers: the more, the better? No! Too much load on storage and network Use max concurrent tasks limit on proxies or repositories Watch for “job timed out waiting for resources” messages Backup repository considerations Be careful with the reversed incremental backup mode! Limit concurrent jobs on backup repositories to a reasonable amount Use ingest rate throttling for cross-SAN backups

6 A word on backup repositories
Don’t underestimate the importance of performance! By far, the most commonly reported bottleneck What makes the best backup repositories? Windows or Linux server (can be same as backup proxy server) Local storage, DAS or SAN mounted for physical server pRDM disk (vSphere 5+), or iSCSI LUN connected via in-guest iSCSI for virtual server Sub-optimal backup storage NAS or network share VMDK on VMFS (size and recoverability considerations) RAID level If you can afford it, use RAID10 (again, performance)

7 Processing Modes All you need to know

8 Direct SAN Access: The good
Fastest processing mode Least impact on production Backup processing is fully offloaded to dedicated backup proxy servers Backup traffic is isolated to the storage network (aka LAN-free) Does not impact consolidation ratio, so cheapest too

9 Direct SAN Access: The bad
Supports block storage only FC (fibre channel): physical backup proxy server only! iSCSI: physical and virtual backup proxy servers both supported Physical backup proxy server requirement for FC SAN Might not go along well with your virtualization project Consider repurposing older servers Might be hard for beginners to setup See Veeam Forums FAQ for step-by-step guide Manual datastore mapping might be required For certain SANs, B&R may not able to detect proxy connectivity

10 Direct SAN Access: The ugly
What’s the worst that could happen? Windows re-signaturing your VMFS LUNs! vSphere will no longer recognize datastores Don’t panic, VMware Support should be able to fix Three easy ways to get into trouble Windows Explorer automounting new volumes (but not with Veeam) Clicking Disk Management snap-in popup without reading Giving Local Administrator rights to random people

11 Direct SAN Access: The safe way
Present VMFS LUNs to backup proxy server as read-only Most SANs support it these days—chase your vendor if yours does not Disable automount on your backup proxy servers Do it the right way: use SANPolicy Windows setting! Veeam backup proxy server setup does this automatically for you Disable Disk Management snap-in with Group Policy User Configuration > Administrative Templates Window Components > Microsoft Management Console > Restricted/Permitted snap-ins > Disk Management Keep Local Administrator rights on backup proxy servers to yourself Cannot really do this for default proxy due to FLR requirement Another reason to use dedicated backup proxy server! automount disable is deprecated, and causes issues!

12 Direct SAN Access: Tips & tricks
Got a fast SAN? Get a modern backup proxy server! Multi-core CPU (compression) and fast RAM (inline deduplication) Update firmware and drivers across the board Disabling MPIO may increase performance iSCSI SAN? Tweak TCP/IP on backup proxy netsh interface tcp set global autotuning level = disable Increase read-ahead buffer Default is 4MB (optimal setting for most SANs) To change, create the new value in bytes: VddkPreReadBufferSize (DWORD) Also, be sure to search Veeam forums for other people’s experiences. Some hardware is just bad, apparently.

13 Hot Add: The good Easy to setup—very little planning involved
Any Windows VM can be made a Hot Add backup proxy Fast data transfers with any storage Direct storage access (albeit through ESXi storage stack) Supports all types of storage (including NFS) Shared storage: at least 1 backup proxy server per vSphere cluster Local storage or DAS: at least 1 backup proxy server per host Use your existing Windows VMs (save on licensing) Data processing engine process runs with lower priority (6.1) Further CPU usage reduction in 6.5 Allows for 100% virtual deployment

14 Hot Add: The bad Not as mature as other modes
Affects your consolidation ratio Backup proxy servers take host resources Ultimately means more ESXi hosts, and more VMware licenses Hot Add process itself is slooow Can take up to 1–2 minutes to complete for each VM—adds up quickly! Hot Add as a vSphere feature has a number of limitations Good news—many are being removed as VDDK matures See FAQ on Veeam forums FAQ for the complete list

15 Hot Add: The ugly Snapshot removal problems due to locks
Veeam B&R: multiple hooks in place to work around CBT must be disabled on backup proxy VM Prevents stun on Hot Add due to CBT initialization NFS-specific issue Extended VM stun on hot remove in some scenarios

16 Hot Add: Tips & tricks Add extra virtual SCSI controller to backup proxy server A single SCSI controller can have a maximum of 16 disks attached Concurrent jobs on the same backup proxy server can result in more! Keep vSphere and Veeam up to date Single block size in VMFS5 removes the most common hot add issue Latest Veeam Backup & Replication will have latest and greatest VDDK version Try increasing read-ahead buffer Seems to really help with certain NFS storage Avoid cloning backup proxy VM For example, to provision additional backup proxies

17 Network (NBD): The good
Easy to setup—in fact, no setup is required Any existing server (physical or virtual) would do Supports all types of storage, including NFS Server placement does not matter (unlike with Hot Add) Very quick to initialize data transfer Can be quite fast—with 10Gb Ethernet

18 Network (NBD): The ugly
Painfully slow performance on 1Gb Ethernet Average speed reported is MB/s Leverages ESXi management interface

19 Network (NBD): Tips & tricks
1 Gb Ethernet Use for sites with low change rate Works faster than other processing modes in such conditions Keep at least one Hot Add backup proxy server around Full VM and virtual disk restores take forever over NBD Keep in mind intelligent load balancing algorithms Network backup proxy servers have lowest priority! Upgrade to 6.1 or later Improved network proxy location awareness

20 One last thing This hack significantly reduces supportability!
Cut up to 5 minutes of processing time per VM by disabling VDDK logging Apply in stable environments only! Create the new value and set to 1: DisableVDDKNetworkOutput (DWORD)

21 Deduplicating Storage
Yes, you can afford it!

22 Deduplicating storage: The good
What gives? Global dedupe! Deduplication across backup files from different jobs Perfect for long-term backup archival Top hardware appliances among Veeam users EMC DataDomain ExaGrid HP StoreOnce Top software appliances among Veeam users ZFS-based appliances StarWind Windows Server 2012 dedupe is awesome

23 Deduplicating storage: The bad
Hardware appliances are expensive Although they do provide excellent dedupe ratio Software appliances are resource hogs Both performance and dedupe ratio are sub-par, too Windows Server 2012 dedupe is awesome Included free of charge—start using it today! Provides very decent dedupe ratio

24 Deduplicating storage: The ugly
Random access performance is lacking A problem for all solutions featuring inline deduplication Typically insufficient out-of-the-box for large-scale vPower usage Exception: post-process deduplication ExaGrid Raw disk landing zone (full-speed vPower from recent backups) Veeam-specific logic further optimizes performance Windows Server 2012 Backups “land” on raw storage at full speed Only old backup files are deduplicated—great for vPower Decent speed even off already deduped backups

25 Deduplicating storage: Tips & tricks
Already own storage with inline deduplication? Inline data “rehydration” process is what makes vPower slow Reduce the block size in Advanced job settings WAN (256KB) and LAN (512KB) Reduced block size might impact backup performance Use Linux-based backup repository Large client cache, or even caching client file system (FS-cache), can significantly improve vPower performance

26 Deduplicating storage: Tips & tricks (continued)
Keep Veeam dedupe on Use incremental backup mode Choice of synthetic or active fulls depending on actual storage For best dedupe ratio on device side… Disable compression (significantly increases amount of data transferred from backup proxy server to backup repository over network) For best backup performance and smallest window Keep compression at default If you like to avoid extremes… Set compression to Low (dedupe-friendly)

27 Deduplicating storage: Tips & tricks (continued)
Got more than one deduplicating storage device? Use internal replication to sync backups offsite! Extremely traffic-efficient approach Many customers use and report great success! Keep the backups imported for easy DR To automate repository refresh in DR site, use: Get-VBRBackupRepository -Name "DR_Repository" | Sync-VBRBackupRepository

28 WAN Accelerators Your WAN on steroids

29 WAN accelerators: The good
Two types of WAN accelerators Caching WAN accelerators provide significant bandwidth savings with Veeam replication, but are typically quite expensive Transport layer WAN optimizers are unlikely to offer significant bandwidth savings with Veeam replication, and are usually cheap Both improve reliability of TCP Long distance wireless or satellite links IPsec rekey operations on a VPN tunnel WAN links with high jitter, packet loss or occasional drops Both allow long-running jobs to finish more consistently For example, initial replication over network Both improve WAN utilization for most workloads Little bandwidth savings doesn’t mean these tools can't sometimes be useful. Some links can experience small "drops", for example, on long distance wireless or satellite links, or even simply unreliable internet links. In these situations a long replication cycle is likely to crash, but these transport layer optimizers can many times "hide" these short outages from the TCP layer by faking TCP retransmits/keepalives and filtering ICMP unreachable messages from reaching the backup proxy server. This can allow long-running replication jobs to finish more consistently in the presence of less-than-reliable WAN links.

30 WAN accelerators: What’s hot?
Top caching WAN accelerators among Veeam users Cisco WAAS Riverbed SilverPeak Top WAN optimizers among Veeam users Hyper-IP

31 WAN optimizers: Tips & tricks
Veeam Backup & Replication leaves little room for bandwidth reduction by WAN optimizers Built-in WAN optimizations in v6: Multiple TCP streams to maximize throughput Network traffic compression Consider using on unreliable networks, but don’t expect them to add you extra bandwidth Update to Backup & Replication 6.1 Patch 1 before evaluating Veeam Backup & Replication not using all available bandwidth? Increase the amount of TCP streams (default is 5) DownloadStreamsNumber (DWORD)

32 Caching WAN accelerators: Tips & tricks
Multiple TCP streams can cause issues! Disable multiple streams in B&R traffic throttling settings Disable network traffic compression in Veeam Low (dedupe-friendly) compression level might be a better option If required, have network admins configure bypass on Veeam backup proxy servers to avoid polluting caches

33 Veeam Backup & Replication 6.5
We never stand still

34 What’s coming in 6.5 Veeam Explorer for Microsoft Exchange
Veeam Explorer for SAN Snapshots VMware vSphere 5.1 support Windows Server 2012 support

35 Veeam Explorer for Microsoft Exchange
Visibility into Exchange VM backups Immediate: No need to provision storage, restore the VM or restore the mailbox store Agentless Requires no special backups or metadata collection—even works with existing Veeam backups (and SAN snapshots) Free! Included in all versions of Veeam Backup & Replication 6.5, including Free Edition Eliminates need for expensive standalone tools licensed per-mailbox Currently available in “exclusive beta” Just restored a 145 GB #MSExchange Public Folder database in 2 min. Then restored a single item all under 10 min. SWEET! The new #veeam explorer for exchange looks veeamy. That's right, I just made up a new word (it means awesomesauce) Even the *beta* Exchange Explorer works a treat. Saved literally, hours of work.. and saved my bacon. #recommend Really excited with the Explorer beta for #Microsoft Exchange VM backups - we have lots of interested customers ready for this!

36 Veeam Explorer for Microsoft Exchange (continued)
Capabilities Browse: familiar Explorer-type interface Search: familiar Outlook-like Find, including Advanced Find Export: export to PST file, MSG file or attachment Uses cases E-discovery Item-level restore: export and send to affected user Mailbox archive Supports Exchange Server 2010

37 Veeam Explorer for SAN Snapshots
Veeam restores from SAN snapshots Supports tiered data protection strategy Perform all restores through familiar, easy-to-use Veeam interface Supports HP StoreVirtual VSA and HP LeftHand SAN snapshots + Veeam restore = Best RPOs and RTOs for operational recovery

38 Veeam Explorer for SAN Snapshots (continued)
Fast: recover entire VM or individual items in < 2 minutes Fully automated: clone & promote snapshot, present to vSphere, clean up Restores directly from VM files on the SAN snapshot: no staging or intermediate restores required Flexible Specific VM Individual guest files: Windows, Linux, et al Individual Microsoft Exchange items Free Worry-free: automated process eliminates human errors and protects integrity of SAN snapshots and production LUNS Agent-free: no agents to deploy on hosts or VMs Literally free: included in all editions of Veeam Backup & Replication 6.5, including Free Edition

39 Questions? Comments?

40 Thanks for attending!


42 Veeam Backup & Replication: Tips and Tricks
SPO3292 Veeam Backup & Replication: Tips and Tricks Anton Gostev Veeam Software @Gostev Doug Hazelman Veeam Software @VMDoug #vmworldsponsor

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