Gerd W. Becker, EMPALIS GmbH TSM Symposium 2009 Petersberg Autor 1

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1 How to backup NAS-Filers with (and without) NDMP Gerd W. Becker, EMPALIS GmbH TSM Symposium 2009 Petersberg Autor 1 Personal Data Gerd Becker is a Project Manager for EMPALIS GmbH, an IBM Business Partner in Germany. He has more than 30 years of IT experience, including over 15 years experience with storage management products such as DFSMS and Tivoli Storage Manager. His areas of expertise include IBM Tivoli Storage Manager implementation projects and education at customer sites, including mainframe environments (OS/390, VSE, VM, and Linux for zseries ). He holds several certifications, including technical and sales, and is an IBM Tivoli Certified Instructor. He has developed and taught several storage classes for IBM Education Services in Germany, Switzerland and Austria and for qskills in Nuernberg. He has been Chairman of the Guide Share Europe (GSE) Stoage-Usergroup for more than 6 years. He is author of the Redbooks IBM Tivoli Storage Manager Technical Guide 5.3, IBM Tivoli Storage Manager Technical Guide 6.1, IBM Tivoli Storage Manager Certification Guide 6.1, did the betatest for TSM Version 5.5 and 6.1 and is member of the TSM Advisory Council. Gerd Becker Empalis GmbH TSM Symposium 2009 Empalis GmbH 2

2 Abstract What methods can we use, to backup NAS Filers like IBM N series / NetApp with IBM Tivoli Storage Manager. Details about Snapshots NDMP Filer-to-Server Snap Mirror to Tape Incremental with Snapdiff. The Team who wrote the Redbook IBM Tivoli Storage Manager Technical Guide Version 6.1 This presentation will show, how it fits all together to design a powerful backup and disaster recovery solution TSM Symposium 2009 Empalis GmbH 3 Agenda NDMP Enhancements Tivoli Storage Manager and NDMP Filer-to-attached-library Filer-to-server Administration, Backup and Restore New Functions TSM Symposium 2009 Empalis GmbH 4

3 Tivoli Storage Manager and NDMP The NDMP Client-Server architecture separates the control and data flow: Data Management Application (DMA) also known as the NDMP client which is typically a backup application. Since NDMP Version 4 support, NDMP clients are called DMAs. The DMA initiates, controls, and monitors NDMP sessions for backup and recovery of data and tracks and manages backups and media. NDMP server performs one or more services The Data Service transfers data to and from primary storage (typically a NAS file system) The Tape Service transfers data to and from secondary storage (typically a tape drive) and allows the DMA to manipulate and access secondary storage (tape positioning and I/O) The SCSI Service passes low-level SCSI commands from the DMA to a SCSI device (typically a media changer) TSM Symposium 2009 Empalis GmbH 5 Agenda NDMP Enhancements Tivoli Storage Manager and NDMP Filer-to-attached-library Filer-to-server Administration, Backup and Restore New Functions TSM Symposium 2009 Empalis GmbH 6

4 Filer-to-attached-library TSM Symposium 2009 Empalis GmbH 7

5 Overview of NDMP Offsite Vaulting Tivoli Storage Manager server backend-data movements are enhanced to use NDMP tape-to-tape copy functions for tape volumes containing NDMPgenerated backup images. Allows for the backup and restore storage pools and restoration of individual volumes in an NDMP storage pool. Allows for Move Data within an NDMP storage pool. Allows use of Copy Storage Pool Volumes when needed for a Restore Node process (no simultaneous-write support) Allows for integrating Disaster Recovery Manager (DRM) functions with NDMP storage pools. TSM Symposium 2009 Empalis GmbH 9 Requirements Hardware and software requirements: Tape-to-tape Copy Data Mover must be able to read and write to both source and target drives. For example, they must have correct paths, mount points, and attributes in pools. Data Movers must support NDMP version 4 for all new function. Tivoli Storage Manager requirements Tivoli Storage Manager 5.4 server on platforms other than z/os (no storage agent support). TSM Symposium 2009 Empalis GmbH 11

6 Miscellaneous Features DRM SET DRMPRIMSTGPOOL and SET DRMCOPYSTGPOOL may include storage pools containing NAS data and TOC files. BACKUP STGPOOL Incremental is based on backing up NAS images There is no sub-image backup or continuation. Ensure that the TOC storage pool also has a copy storage pool. Since there was no copy storage pool for NAS pools in prior releases, it could be missed in implementing the new functionality. Best practice would be a separate TOC-only pool with a separate copy storage pool. NAS Workload Influence The server keeps track of server NAS operations. When a request is made which can be satisfied by multiple data movers (having paths to all needed devices), the server takes into account the workload in choosing a data mover. 3 -Way Function is not used in this new function. Paths to all needed devices must be available to perform a backend operation. TSM Symposium 2009 Empalis GmbH 12 Agenda NDMP Enhancements Tivoli Storage Manager and NDMP Filer-to-attached-library Filer-to-server Administration, Backup and Restore New Functions TSM Symposium 2009 Empalis GmbH 13

7 NDMP: Filer-to-Server Configurations TSM Server Robotics control Data NDMP control (TCP/IP) Data (TCP/IP) Tape library NAS Device Data NAS file system Allows centralization of tape resource Full capability of TSM storage hierarchy (migration, reclamation, copypool, etc.) TSM Symposium 2009 Empalis GmbH 14 Overview NDMP Filer-to-server backup allows you to backup NAS devices to the native Tivoli Storage Manager storage hierarchy (storage pools with data formats of NATIVE or NONBLOCK). No need for a tape library connected to NAS device. Backup is through the LAN. All Tivoli Storage Manager backend data management functions can be performed on NAS backup data in native storage pools. All existing NAS backup functions are supported for Filer-to-server backups: TOC creation File level restore (FLR) Direct Access Recovery (DAR) TSM Symposium 2009 Empalis GmbH 15

8 Requirements Hardware and Software Requirements: NAS file server which supports NDMP version 4.0 and NDMP threeway backup Tivoli Storage Manager 5.4 server (Unix or Windows) with enough free storage capacity for NAS backup images (typically very large) Tivoli Storage Manager 5.4 Administration Center is needed to configure filer-to-server operations via GUI. Note: Once Tivoli Storage Manager native storage pools have been used for NAS backups, previous versions of the Tivoli Storage Manager server cannot be used to restore the resulting backups. TSM Symposium 2009 Empalis GmbH 16 Classic NDMP Implementation NDMP Local Backup Configuration NAS device Tivoli Storage Manager server control NDMP DMA NDMP data server Data NAS file system data NDMP tape server data control tape subsystem TSM Symposium 2009 Empalis GmbH 17

9 Background: NDMP Components Tape Server: Accepts backup data from an NDMP data stream and writes to tape, or reads restore data from a tape and writes it to an NDMP data stream. Two main sub- components: Mover Interface: Controls reading and writing of data from the NDMP data server and a tape device. Tape Interface: supports tape read/write and tape positioning operations Data Management Application (DMA): Backup software application which initiates NDMP backup and restore operations on NDMP tape and data servers Data Server: 1. Reads data from a file system and generates an NDMP data stream in a vendor specific backup format. 2. Sends file metadata to DMA during backup. 3. Reads an NDMP data stream and restores it back to a file system. TSM Symposium 2009 Empalis GmbH 18 Tivoli Storage Manager Filer-to-server Backup Implementation NDMP Filer-to-Server Configuration NAS device Tivoli Storage Manager 5.4 server NDMP data server data NAS file system control data NDMP DMA control NDMP tape server data server bit file services data Tivoli Storage Manager storage TSM Symposium 2009 Empalis GmbH 19

10 Tivoli Storage Manager NDMP Tape Server A modified NDMP tape server is implemented in the Tivoli Storage Manager server. Only the Mover Interface is implemented and has no direct access to tape devices. It stores NAS backup images in Tivoli Storage Manager Storage hierarchy. Tivoli Storage Manager tape server can only be accessed from within Tivoli Storage Manager server. No other DMA may communicate with it including DMAs of other Tivoli Storage Manager servers. No user configuration is needed unless the default NDMP tape server port is unavailable. It supports multiple concurrent NDMP operations. TSM Symposium 2009 Empalis GmbH 20 New Functions No new server commands QUERY NASBACKUP now displays the storage pool in which each image is stored New Server Options: NDMPControlport port-number Port used by Tivoli Storage Manager tape server and Tivoli Storage Manager DMA to communicate internally. Default is NDMPPortrange port-number-low[,port-number-high ] The range of port numbers from which Tivoli Storage Manager tape server will select a port for accepting connections from a NAS device s data server. Default is to let the OS provide a port (ephemeral port). NDMPPREFDATAinterface ip-address With the NDMPPREFDATAINTERFACE option enabled, you can specify which network interface thetivoli Storage Manager server uses to receive NDMP backup data during NDMP filer-to-server backup operations. Tivoli Storage Manager Administration Center NAS Configuration for Storage Wizard is updated to allow for pointing NAS backups to a native storage pool. TSM Symposium 2009 Empalis GmbH 21

11 Setup for NDMP Filer-to-server Backup 1. Register a NAS node. 2. Define a data mover for NAS node (no change from today). 3. Determine target native storage pool (for example: BACKUPPOOL or tape pool). 4. Determine location for TOCs. 5. Set or update policy appropriately. Can use same policy as traditional Tivoli Storage Manager clients. TSM Symposium 2009 Empalis GmbH 22 Special considerations in a filer-to-server configuration Simultaneous write is not supported for NAS backup images. The backup mode for NDMP-generated data in the filer-toserver configuration remains image-based. This means that NDMP-generated data will not be created in progressive incremental mode. NAS backup data cannot be moved between NAS type storage pools (e.g. NETAPPDUMP) and native storage pools. Export and import of NAS images and NAS nodes is not supported The communication session from the filer to the server will be established on the network that was identified through the gethostbyname function of the Tivoli Storage Manager server. Make sure you have appropriate name resolution in place. TSM Symposium 2009 Empalis GmbH 23

12 Filer-to-server Backup: Things to Remember The estimated size of a NAS backup image is always the current occupancy of the entire file system even for differential backups. Connectivity can be affected by firewalls. NAS device now opens outbound connection to Tivoli Storage Manager tape server during backup. All backend data movement is supported for NAS Images stored in native storage pools. Full plus Differential restores can use a mix of storage pool types. Example: Full in NAS pool, differential in native pool. TSM Symposium 2009 Empalis GmbH 24 NDMP Wizards Overview Main Enhancements allow user to configure NDMP to: Create the backup storage pool as either NAS (in a tape library attached to the NAS File Server) or as Native (using a device class). Create backup storage pools as well as primary storage pools. Add additional tape libraries to existing NAS File Server. TSM Symposium 2009 Empalis GmbH 25

13 Requirements to Use NDMP Wizards Hardware: special file names (device names) of the library and drives being attached, and element numbers Element numbers of drives (for SCSI tape) ACS id's (for ACSLS) NAS file server's TCP name or IP address and port, and the username and password Device class name (for native storage pools) TSM Symposium 2009 Empalis GmbH 26 Wizard Changes The existing NDMP wizard is called Add a NAS Node and is a table action in the Nodes Table. This wizard is renamed to Protect a NAS File Server and is an action in the Servers, Libraries, Nodes, Storage Pools, Datamovers, and Device classes tables (all the tables on the Storage Devices portlet). A new, similar wizard is called Add Storage to NDMP operations and is located in all the tables on the Storage Devices portlet. This wizard assumes that the NAS file server is already fully configured. Its purpose is strictly to: Add a new library to it. Connect it to another existing library with new drive paths. Add a new primary and copy storage pool. TSM Symposium 2009 Empalis GmbH 27

14 NDMP Configuration Wizard TSM Symposium 2009 Empalis GmbH 28 Protect a NAS File Server: Define NAS Node TSM Symposium 2009 Empalis GmbH 30

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16 Protect a NAS File Server: Select Destination TSM Symposium 2009 Empalis GmbH 33 Protect a NAS File Server: Select Policy Domain TSM Symposium 2009 Empalis GmbH 34

17 Protect a NAS File Server: Select an Existing Domain Only domains that already have NAS file server's node defined to them are shown in the select action box. This is a best practice, to avoid mixing NAS and non-nas data. If an existing domain is selected, that domain's policies including storage pools, are used. New storage pools are not defined. If no such domains exist, the ability to choose a domain is not shown, and the user must define a new domain for the NAS data. TSM Symposium 2009 Empalis GmbH 35 Protect a NAS File Server: Define a Native Storage Pool TSM Symposium 2009 Empalis GmbH 36

18 Protect a NAS File Server: Native Copy Storage Pool TSM Symposium 2009 Empalis GmbH 37 Protect a NAS File Server: Wizard Summary TSM Symposium 2009 Empalis GmbH 38

19 Add Storage to NDMP Operations: Select Data Mover TSM Symposium 2009 Empalis GmbH 39 Add Storage to NDMP Operations: Select a Library TSM Symposium 2009 Empalis GmbH 40

20 Add Storage to NDMP Operations: Add a Drive Path TSM Symposium 2009 Empalis GmbH 41 Add Storage to NDMP Operations: Create Storage Pools TSM Symposium 2009 Empalis GmbH 42

21 Protect a NAS File Server: Wizard Summary TSM Symposium 2009 Empalis GmbH 43 here again with commands REGISTER NODE na3025?***? PASSEXP=0 CONTACT= TYPE=NAS DEFINE DATAMOVER na3025 TYPE=NAS HLADDRESS=na3025 LLADDRESS=10000 USERID=ndmpuser PASSWORD=?***? DATAFORMAT=NETAPPDUMP DEFINE STGPOOL TOCPOOL DISK pooltype=primary description="stg-pool fuer NDMP-TOC DEFINE VOLUME TOCPOOL e:\tsm\data\tocvol01.dsm formatsize=100 DEFINE DOMAIN PD_NAS DESCRIPTION="Policy_Domaene fuer NDMP- Backups" BACKRETENTION=30 ARCHRETENTION=365 DEFINE POLICYSET PD_NAS standard desc="standard policy set DEFINE MGMTCLASS PD_NAS standard standard desc="standard management class fuer Filer-to-Server" DEFINE COPYGROUP PD_NAS standard standard destination=ndmppool ASSIGN DEFMGMTCLASS PD_NAS standard standard ACTIVATE POLICYSET PD_NAS standard UPDATE NODE NA3025 domain=pd_nas TSM Symposium 2009 Empalis GmbH 44

22 First Test Administative TSM-Command: A process will be started TSM Symposium 2009 Empalis GmbH 45

23 Backup with Web-Client TSM Symposium 2009 Empalis GmbH 47 Agenda NDMP Enhancements Tivoli Storage Manager and NDMP Filer-to-attached-library Filer-to-server Administration, Backup and Restore New Functions TSM Symposium 2009 Empalis GmbH 48

24 Two-Tier Concept -Data recovery from Snapshot TSM Symposium 2009 Empalis GmbH 49 Two-Tier Concept - Data recovery from NDMP-Dump Image Restore Restore complete Volume Directorey-based restore Single File or Folder Restore Web-Client Command-Line Interface Point-in-Time TSM Symposium 2009 Empalis GmbH 50

25 Two-Tier Concept - Recovery form NDMP-Dump with Web-Klient TSM Symposium 2009 Empalis GmbH 51 Setup Administrator for Web-Client We need an Administrator with following privileges: Node Owner Policy resticted / unrestricted System Define Node Owner Administrator At registration of the node, with parameter userid=<admin-name> Manuell, by register admin and grant authority node owner for one or more nodes Administrative command: Register node... Userid=node name Register admin Grant auth TSM Symposium 2009 Empalis GmbH 52

26 Privileges for Web-Client TSM Symposium 2009 Empalis GmbH 53

27 Backup and Restore of NAS-Data TSM Symposium 2009 Empalis GmbH 55

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30 Restore on File-Level Restore singel Files or Direcotries with Web-Client or Server-Command Restore with Web-Client for Backup / Archive Table of Content available Web-Client on Windows2000 oder Windows2003 Temporary load TOC in Server Database examine directories and files contained in one or more file system images, and select individual files or directories to restore directly from the backup images generated. Restore using Server Interface QUERY NASBACKUP RESTORE NODE with parameter FILELIST Without TOC the contents of the backup image cannot be displayed. You can restore individual files, directories, or both, if you know the name of the file or directory, and in which image the backup is located. TSM Symposium 2009 Empalis GmbH 61 Restore on File-Level with Web client Select FILELEVEL Load TOC TSM Symposium 2009 Empalis GmbH 62

31 Restore on File-Level with Web client Select files for restore Select destination for restored objects TSM Symposium 2009 Empalis GmbH 63 Troubleshooting Are the options correctly set on the filer? ndmpd status Have a look into the files on the filer? /etc/log/backup Set up NDMP Trace priv set advanced (take care, super-user permissions) ndmpd debug 70 (reset after test to 0) Result in /etc/log/ndmpdlog Set up Trace in TSM: trace disable * trace enable spi spid sessremote addmsg trace begin pathandfilenamehere...run the test trace flush trace end trace disable * TSM Symposium 2009 Empalis GmbH 66

32 Agenda NDMP Enhancements Tivoli Storage Manager and NDMP Filer-to-attached-library Filer-to-server Administration, Backup and Restore New Functions TSM Symposium 2009 Empalis GmbH 67 General VSS Architecture Volume Shadow Copy Service - A service that coordinates various components to create consistent shadow copies of one or more volumes. Requestor - An application that requests that volume shadow copy be taken. A backup application is an example (This is DP for SQL or DP for Exchange) Writer A component of an application that stores persistent information on one or more volumes that participate in shadow copy synchronization. Typically this is a database application like SQL Server, Exchange Server, or a system service like Active Directory Provider A component that creates and maintains the shadow copies. Examples are the system provider included with the operating system and the hardware providers included with storage Arrays. Source Volume The volume that contains the data to be shadow copied. Storage/Target Volume The volume that holds the shadow copy storage files for the system copy-on-write software provider. TSM Symposium 2009 Empalis GmbH 68

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34 Agenda NDMP Enhancements Tivoli Storage Manager and NDMP Filer-to-attached-library Filer-to-server Administration, Backup and Restore New Functions Snapshot Difference API Snap-Mirror-to-Tape TSM Symposium 2009 Empalis GmbH 71 Issues for Implementations up to TSM 5.5.x TSM Symposium 2009 Empalis GmbH 72

35 TSM 6.1 N series Snapshot Exploitation Progressive Incremental Backup with Snapshot Differencing NDMP Snapmirror-to-Tape (SM2T) Backup and Restore TSM Symposium 2009 Empalis GmbH 73 TSM Backup Client with Snapshot Differencing TSM Symposium 2009 Empalis GmbH 74

36 Incremental/Snapdiff Backup - NetApp Snapshot API 1. NetApp has extended the Snapshot API to include the Snapshot Difference API (SnapDiff) 2. When called, Snapdiff returns a list of changed files, based on successive snapshots ( base and diff ) 3. Files are deemed changed if they have been created, modified or deleted (as determined by Snapdiff) TSM Symposium 2009 Empalis GmbH 75 Incremental/Snapdiff Backup - NetApp Snapshot API 1. NetApp has extended the Snapshot API to include the Snapshot Difference API (SnapDiff) 2. When called, Snapdiff returns a list of changed files, based on successive snapshots ( base and diff ) 3. Files are deemed changed if they have been created, modified or deleted (as determined by Snapdiff) TSM Symposium 2009 Empalis GmbH 76

37 Incremental/Snapdiff Backup - Processing (1) Initial Incremental (Backup) 1. Incremental (using Snapdiff) initiated by TSM 2. nseries/netapp machine generates a file list to use for the TSM incremental 3. Incremental backup is completed and sent to TSM server 4. Snapshot name is also sent to TSM, (stored in client s filespace) TSM Symposium 2009 Empalis GmbH 77 Incremental/Snapdiff Backup - Processing (1) TSM Symposium 2009 Empalis GmbH 78

38 Incremental/Snapdiff Backup - Processing (2) Subsequent Incrementals 1. Name of the last snapshot retrieved from TSM server 2. New snapshot taken by nseries/netapp machine 3. Snapdiff compares the new and last snapshots and reports changes to TSM 4. Incremental of new snapshot is performed (based on #3 changes) and sent to TSM server 5. New snapshot name is sent to TSM server for use in next incremental TSM Symposium 2009 Empalis GmbH 79 Incremental Snapdiff Backups New Options (1) Snapdiff no parameters Examples: incremental -snapdiff /net/home1 incremental -snapdiff H: Diffsnapshot Create Latest Example: incremental -snapdiff H: -diffsnapshot=create TSM Symposium 2009 Empalis GmbH 80

39 Incremental Snapdiff Backups New GUI Elements (1) SnapDiff is triggered by a new backup type selection, in the backup window This selection will only be allowed with mounted and eligible network volumes TSM Symposium 2009 Empalis GmbH 81 Snapdiff Incremental New Password Parameters The Set Password command has been extended to allow setting a userid and password to be used for SnapDiff operations on a NAS volume. A new parameter TYPE has been added to the set password command. Type Specifies if this password is for the workstation or filer. Use TYPE=TSM to specify the Tivoli Storage Manager password for your workstation. Use TYPE=FILER to specify this password is for snapdiff operations on a filer. The default is TSM. Otherserver Specifies the filer host name if TYPE=FILER. The filer host name must be the fully qualified DNS name and can not be the IP address in the dotted decimal format or the short local hostname. Otheruserid Specifies the userid to be used for the entity named by the otherserver parameter. Otherpassword Specifies the password to be used for entity named by the otherserver parameter. Example: dsmc set password type=filer filer101 fileuser filer101pw tsm> set password -type=filer sim1 administrator sim1 administrator Please enter password for user id ***** Please Re-enter enter the password password for verification:***** for user id ***** Re-enter ANS0302I Successfully the password done. for verification:***** ANS0302I Successfully done. TSM Symposium 2009 Empalis GmbH 82

40 Incremental/Snapdiff Backups - Additional Information (1) No external or internal dependencies Storage Agent LANfree data movement is supported No migration of data is involved For existing TSM protected filers, the same rules apply. The first time SNAPDIFF backup runs, it will create the base snapshot, and perform a full scan incremental backup of that snapshot. Subsequent backups will then use the snapdiff method for backup. TSM Symposium 2009 Empalis GmbH 83 Incremental/Snapdiff Backups - Additional Information (2) Any and all changes to any and all filesystem objects are tracked and acted upon by SnapDiff. In this regard, TSM will rely on Snapdiff to provide a list of files eligible for backup This work item is applicable to NetApp/N-Series volumes that are NAS attached to the host on which TSM client is running. At this time, the host must reside on either AIX (NFS) or Windows (CIFS) SAN attached NetApp/N-Series volumes are not supported at this time TSM Symposium 2009 Empalis GmbH 84

41 Incremental/Snapdiff Backups - Additional Information (3) Currently, entire NAS volumes are supported. Qtrees or subdirectories of a NAS volume are not supported. SnapDiff won't be allowed for any filespace not mounted or mapped to the root of the volume NetApp/N-Series filers running Data ONTAP 7.3 or later is supported The Java and web client GUIs are supported Native windows GUI (MFC GUI) is being phased out and is not supported Both traditional and FlexVol filer volumes are supported TSM Symposium 2009 Empalis GmbH 85 Considerations - Incremental/Snapdiff Scenarios (1) Given: A file is excluded by incl/excl rules TSM performs an Incr/Snapdiff backup The user removes the exclude rule for that file Result: SnapDiff will not detect this incl/excl change because it only detects file changes between 2 snapshots TSM Symposium 2009 Empalis GmbH 86

42 Considerations - Incremental/Snapdiff Scenarios (2) Given: A user adds an include statement to the option file Result: Only if Snapdiff detects a change will that include rule take affect Given: A Policy changes from Mode=modified to mode=absolute Result: This change will not be detected by Snapdiff Given: A copy group policy (mode) changes from modified to absolute. Result: SnapDiff incremental backups do not reference this policy attribute. After the initial backup, unless files change, they will not be backup up TSM Symposium 2009 Empalis GmbH 87 Considerations - Snapdiff internationalization (3) Snapdiff does not support Unicode characters outside of 7-bit ASCII Snapdiff with ONTAP UTF8 enabled volumes will not return the filename in UTF8 Will be addressed by NetAPP in a future revision of ONTAP TSM dsmerror.log will contain "File Not Found" errors for these files ANS1626E An unexpected error was encountered when processing a TSM operation using a hardware or snapshot function. TSM function name : NAHWInterface::naPerformSnapDiff TSM function : Error invoking ONTAP API snapdiff-iter-next: Parsing error in results: Input is not proper UTF-8, indicate encoding! Bytes: 0xF6 0xE4 0xFC 0xD6 TSM return code : TSM file : NAHWInterface.cpp (6776) 07/22/ :57:28 ANS5250E An unexpected error was encountered. TSM function name : baperformsnapdiff TSM function : failed to perform snapdiff TSM return code : 653 TSM file : backsnap.cpp (4678) 07/22/ :57:28 ANS2832E Incremental by snapshot difference failed for \\filer1\winvol01. Please see error log for details. 07/22/ :57:30 ANS5283E The operation was unsuccessful. TSM Symposium 2009 Empalis GmbH 88

43 Performance issues and Test Results The performance data contained in this document was measured in a controlled environment. Results obtained in other operating environments may vary significantly depending on factors such as system workload and configuration. Accordingly, this data does not constitute a performance guarantee or warranty Test Environment Filer: N5300 with Data ONTAP Release 7.3 TSM Server: on a 2-way 3.4 GHz, 4GB Windows Server 2003 TSM Client: connected to local TSM Server Storage Pool: File pool on fibre-attached DS8K Small Workload: 8 thousand 100KB files Large Workload: 1.2 million 10KB files Huge Workload: 12 million 10KB files TSM Symposium 2009 Empalis GmbH 89 Performance issues and Test Results The performance data contained in this document was measured in a controlled environment. Results Test obtained results in other operating with environments small may vary workload significantly depending on factors such as system workload and configuration. Accordingly, this data does not constitute a performance guarantee or warranty Test results with small workload In the Small Workload test, when 10% data changed, using NetApp snapshot difference improved throughput from 1538 KB/sec to 2758 KB/sec (80% improvement). In the Small Workload test, when 20% data changed, using NetApp snapshot differenceimproved throughput from 2501 KB/sec to 3139 KB/sec (26% improvement). In the Small Workload test, when 80% data changed, using NetApp snapshot differenceimproved throughput from 3501 KB/sec to 3530 KB/sec (1% improvement). TSM Symposium 2009 Empalis GmbH 90

44 Performance issues and Test Results The performance data contained in this document was measured in a controlled environment. Results Test obtained results in other operating with environments small may vary workload significantly depending on factors such as system workload and configuration. Accordingly, this data does not constitute a performance guarantee or warranty Test results with large workload In the Large Workload test, when 10% data changed, using NetApp snapshot differenceimproved throughput from 228 KB/sec to 676 KB/sec (196% improvement) (about 3x as fast). In the Large Workload test, when 20% data changed, using NetApp snapshot differenceimproved throughput from 433 KB/sec to 756 KB/sec (75% improvement). In the Large Workload test, when 80% data changed, using NetApp snapshot differenceimproved throughput from 472 KB/sec to 913 KB/sec (93% improvement). TSM Symposium 2009 Empalis GmbH 91 Performance issues and Test Results The performance data contained in this document was measured in a controlled environment. Results Test obtained results in other operating with environments small may vary workload significantly depending on factors such as system workload and configuration. Accordingly, this data does not constitute a performance guarantee or warranty Test conclusion In the Huge Workload test, when 10% data changed, using NetApp snapshot difference improved throughput from 199 KB/sec to 537 KB/sec (170% improvement). As an example of reduced backup window, NetApp reduced the backup window of this test from almost 17 hours to about 6.25 hours (37% of the time). The improvement is quite significant when only a small percentage of the data changes. Specific results will vary depending on the hardware configuration. If the percentage of changed data is lower than 10%, an even greater improvement will be expected. TSM Symposium 2009 Empalis GmbH 92

45 Agenda NDMP Enhancements Tivoli Storage Manager and NDMP Filer-to-attached-library Filer-to-server Administration, Backup and Restore New Functions Snapshot Difference API Snap-Mirror-to-Tape TSM Symposium 2009 Empalis GmbH 93 NDMP Snapmirror-to-Tape (SM2T) Backup and Restore WHY? NDMP backups of very large NAS devices can be slow SM2T is a block level movement of a filesystem Similar to BA Client BACKUP IMAGE command Data written to tape is a block by block copy of the file system Disk geometry taken into account Restoration of traditional volume to unlike geometry can be very slow SM2T operations are only supported for Netapp and IBM nseriesfile servers Implementation provided by extending NDMP functions TSM Symposium 2009 Empalis GmbH 94

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