Vorlesung Speichernetzwerke Teil 2 Dipl. – Ing. (BA) Ingo Fuchs 2003

> 2 Agenda I/II  Storage Infrastructure –Client / Server, LAN –Storage DAS, SAN –Storage NAS, iSAN –Backup / Restore –Disaster Recovery –Virtualization –Storage Management

> 3 Agenda II/II  Business Cases –Examples for SAN, NAS, iSAN –TCO / ROI –Analysts View of the storage market –Storage Billing, SLAs –Storage as a utility  Project Model for Storage

> 4 Agenda Storage Infrastructure I/II  Client / Server Infrastructures  LAN Basics  Server Components  SCSI  RAID  SAN Basics, FC  FC Infrastructure Components (Hubs, Switches, Router)  SAN Zoning, LUN Masking, Replication  NAS Basics, IP  NAS Protocols (CIFS, NFS)  iSAN (iSCSI)

> 5 Agenda Storage Infrastructure II/II  Backup / Restore Basics  Backup Hardware  Backup Software  Backup Methods (Full, Differential, Incremental)  Disaster Recovery  Archiving  Storage Virtualization  In-Band / Out-of-Band Virtualization Methods  Storage Infrastructure Management

> 6 Agenda Business Cases  Example Scenarios for SAN, NAS, iSAN  TCO / ROI Basics  TCO / ROI Scenarios  Analysts Views on the storage marketplace  Gartner Magic Quadrant  Service Level Agreements  Storage Resource Billing  A new view on Storage – Storage as a Utility

> 7 Agenda Project Model for Storage  7 steps model  Etc.

Storage Infrastructure II/II

> 9 Backup / Restore  Backup / Restore Basics  Backup Hardware  Backup Software  Backup Methods (Full, Differential, Incremental)  Disaster Recovery  Archiving

> 10 Backup Basics  What is a Backup and why is it necessary  Roles of Hardware, Software and Media  Backup Source / Backup Client, Backup Target  Restore Source, Restore Target  Network Backup  SAN Backup  iSCSI / NDMP Backup

> 11 Backup Hardware  Drive, Autoloader, Library  Drive Technology  Example IBM 3583 LTO Library –Up to 6 Drives –Up to 72 Cartridges –1 or twelve Entry/Exit ports –SCSI or FC Attachment

> 12 Backup Infrastructure  Local Tape Devices  SAN-attached Tape Devices  iSCSI  NDMP

> 13 NDMP - Common Architecture NDMP and the Common Architecture NDMP is an open network protocol that defines common functional interfaces used for these data flows. With NDMP, vendors use common interfaces for common architecture data flows. File system data flows from the file system to the backup device using a common interface, regardless of the platform or device. Control or file meta data is passed to and from the backup software using common interfaces, regardless of the software package. The Network Data Management Protocol (NDMP): NDMP is a network protocol that specifies the communication between the server and the backup software. Communication is defined using a series of defined interfaces. These are XDR encoded messages that are exchanged over a bidirectional TCP/IP connection. The architecture is a client/server model, and the backup software is considered a client to the NDMP server. For every connection between the client on the backup software host and the NDMP host there is a virtual state machine on the NDMP host that is controlled using NDMP. This virtual state machine is referred to as the NDMP server.

> 14 NDMP Terminology –NDMP Network Data Management Protocol. An open protocol for enterprise-wide network- based backup. –NDMP client The application that controls the NDMP server –NDMP host The host that executes the NDMP server application. Data is backed up from the NDMP host to either a local tape drive or to a backup device on a remote NDMP host –NDMP server The virtual state machine on the NDMP host that is controlled using the NDMP protocol. There is one of these for each connection to the NDMP host. This term is used independent of implementation.

> 15 NDMP Configuration I  Base Configuration

> 16 NDMP Configuration II  Two active drives

> 17 NDMP Configuration III  Library

> 18 NDMP Configuration IV  „Filer-to-Filer“:

> 19 NDMP Configuration V  „Tape-to-Tape“:

> 20 NDMP Configuration VI  „Data-to-Data“:

> 21 Backup Media  Media Cartridge  Tape Media  Media Sets  Logical Tape Format (Index, Data Set, File)  Example LTO-2 Tape: –Capacity per Cartridge 200GB native –35 MB/sec native throughput

> 22 Backup Software  Software Components (not product specific) –Job Scheduler –Media Manager –Source System Agent –Network Data Mover –Device Controller (local / remote) –Backup Metadata Catalog –User Interface –Error Handling System

> 23 Backup Methods  Full Backup  Incremental Backup (compared to last Backup) –Restore needs last Full and all Incrementals  Differential Backup (compared to last Full Backup) –Restore needs last Full and last Differential  Cold Backup  Hot Backup –Cache –Snapshot  Image Backup (Hot and Cold)

> 24 Backup addtl. stuff  Tape Duplexing and Mirroring –Mirroring (drive vurtualization) –Duplexing (copy of backup) –Multiple Backup jobs  Tape Migration  Backup-to-Disk  Backup Window

> 25 Disaster Recovery  Disaster Recovery for Clients –Restore without OS on the client –Needs Image + Boot Media  Disaster Recovery for Storage Systems –Multiple Datacenters –Data synchronization –Data recovery mechanism –Documented and tested Recovery Procedures

> 26 Archiving  Long Term storing of data  Move data to other storage media according to: –Cost / Performance –Media lifetime  WORM functionality (MO, CD, DVD, Tape, Disk)

> 27 Storage Virtualization  Who needs Virtualization  In-Band and Out-of-Band Virtualization –Functionality In the fabric vs. External box and functionality in a server-side device driver  Benefits and Pitfalls

> 28 Verfügbarkeitsklassen im SAN

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