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VERITAS NetBackup White Paper

Manual is about: Back-ups

Summary of NetBackup

  • Page 1

    Verit as white p aper veritas netbackup ™ release 3.4 technical overview.

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    W w w . V e r i t a s . C o m p a g e 1 v e r i t a s n e t b a c k u p r e l e a s e 3 . 4 te c h n i c a l o v e r v i e w table of contents product overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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    Netbackup for windows nt and windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 remote administration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 5: Product Overview

    Product overview the veritas netbackup ™ product family provides a complete set of solutions for protecting data from the desktop to the data center and consists of three distinct yet complementary products: netbackup ™ datacenter, netbackup businesserver ™ and netbackup ™ professional. Netbackup da...

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    The netbackup master server maintains a database (called the catalog) which records information about all backup and restore operations. A separate backup procedure is provided to protect the netbackup catalog to facilitate recovery in case of a disk failure. Veritas netbackup is also closely integr...

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    Netbackup servers and clients veritas netbackup includes both client and server software. Server software resides only on the platforms that manage the physical devices used for secondary storage. Client software resides on the individual client workstations containing the data to be backed up (a se...

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    As also shown in figure 2, devices configured on the media servers in the storage domain become additional network storage units for backup and restore operations. When clients have large amounts of data, making them media servers is also an effective way of reducing their backup time and lowering n...

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    Figure 3 diagrams a typical global data manager configuration. As with standard netbackup, all policy management, media management, and device administration can be performed from one location, the netbackup global data manager console. Global data manager need not be available during backup operati...

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    Continuous data availability features timely access to critical data is often the difference between the success or failure of a business. Data must be available to users when they need it. In today’s global economy, critical files and databases must often be available 24 hours per day. If access to...

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    Figure 4: online, high performance database backups enabled through multiplexing. Netbackup also minimizes downtime by providing very fast recovery of databases, whole disks, or even entire sites in the event of a disaster. Netbackup maximizes restore performance by recovering multiple data streams ...

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    Figure 5: online block level incremental backups. Although the storage checkpoint and block level incremental backup technology is not oracle-specific, veritas is first focusing on oracle environments in strategic cooperation with oracle. Block level incremental backup support for other major databa...

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    Figure 6: netbackup support for sap r/3 environments. Lotus notes backups netbackup supports online backup of lotus notes 4 (windows nt/2000) and lotus notes 5 environments. Lotus notes 4 environments on windows nt/2000 can be backed up using standard netbackup with the open transaction manager. Lot...

  • Page 14

    Flashbackup uses snapshot technology to provide high performance, online “file image” backups of mounted file systems 1 while still allowing restores of individual files and directories. Flashbackup significantly enhances backup performance for file servers, web servers, and internet mail servers th...

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    Figure 8: performance improvements using flashbackup. Ndmp backups of network attached storage (nas) veritas netbackup provides online data backup and restore to a locally attached storage device for network-attached storage (nas) hosts using the network data management protocol (ndmp). Currently su...

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    Figure 9: netbackup backups of nas servers via ndmp. Supported ndmp configurations the following sections describe specific supported ndmp configurations and capabilities, providing unparalleled flexibility in defining and implementing a nas backup strategy. Ndmp-to-ndmp (“ndmp client”) backups netb...

  • Page 17

    Library sharing between netbackup and ndmp hosts netbackup can share a tape library between the netbackup server and one or more ndmp nas servers, or just between the ndmp nas servers themselves. For more information, see the “media manager library sharing” section. Emc symmetrix split mirror backup...

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    Veritas netbackup backup concepts the following sections explain the basic concepts involved in backup operations. Storage units veritas netbackup associates all storage devices and media with logical storage units. As used by netbackup, the term storage unit refers to a logical entity that includes...

  • Page 19

    The properties that the administrator configures for each class include: • client list — lists the set of clients in the class. When a new client is added to veritas netbackup, the administrator can simply add the client’s host name to the appropriate class and the client software can optionally be ...

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    Scheduling each veritas netbackup class has a set of schedules to control its backups and archives. These schedules are part of the class definition and each schedule for a class affects the entire list of clients and files in that class. A typical schedule might call for a weekly full backup follow...

  • Page 21

    • retention level — indicates a specific time period for keeping backup or archive copies of files before deleting them from secondary storage. The default retention periods range from one week (level 0) to infinite (level 9); however, the retention periods may be set to any specific value by the ne...

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    • raw database backups (database files or partitions) are configured and executed in the same manner as file backups. The performance resulting from backing up cold databases is generally greater than that achieved when backing up through the unix file system or through the data extraction utilities...

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    W w w . V e r i t a s . C o m p a g e 21 v e r i t a s n e t b a c k u p r e l e a s e 3 . 4 te c h n i c a l o v e r v i e w figure 15: backup data flow. In all cases, the client generates the backup image as a data stream using tcp/ip sockets and sends it to either the veritas netbackup master or ...

  • Page 24

    Figure 16: multiplexed backups. Automatic multi-streaming clients a single netbackup backup class can automatically create multiple simultaneous client backup sessions and dramatically increase the performance of the backup. Parallel backup sessions are initiated based on client system mount points ...

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    W w w . V e r i t a s . C o m p a g e 23 v e r i t a s n e t b a c k u p r e l e a s e 3 . 4 te c h n i c a l o v e r v i e w checkpoint/restart of backup sessions netbackup’s multistreaming capability enables failed streams of a multistreamed backup to be restarted in the event of a backup failure....

  • Page 26: Restore Concepts

    W w w . V e r i t a s . C o m p a g e 24 v e r i t a s n e t b a c k u p r e l e a s e 3 . 4 te c h n i c a l o v e r v i e w restore concepts client users can, at any time, browse their backed up files and select the ones they want to restore. When a user initiates a restore, the request passes fro...

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    Multiplexed restores are especially useful in the case of databases. Often database backup performance can be optimized by multiplexing multiple sessions during the backup. However, many online database backup utilities require that if multiple backup sessions were run in parallel, they must be rest...

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    Figure 21: server-independent restores. • two or more servers are sharing a robot, each with connected drives. When a restore is requested, one of the servers is temporarily inaccessible. Under direction of the master server, any available server in the storage domain can be used to restore the file...

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    In disaster recovery strategies where a set of backup tapes are transferred to a remote site, the following simple series of steps enables quick data availability at the remote site: 1. Using a netbackup-supplied utility on the primary server, create a copy of the netbackup catalog and the media dat...

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    The true image scheme utilized by netbackup avoids creating large backup catalogs typical of competitive true image backup offerings by keeping older true image catalogs on tape rather than all on disk. Backup/restore of moved directories and files moved, renamed, or newly installed files and direct...

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    Netbackup for windows nt and windows 2000 netbackup is available for windows nt and windows 2000 as both a server and client. The netbackup client software for nt/2000 provides backup and disaster recovery services for mission critical nt/2000 systems, including ntfs and fat file system types, micro...

  • Page 32

    Virus scanning the network associates (mcafee) viruscan technology is bundled in the netbackup for windows nt/2000 client. It scans for viruses during backups and restores or both (configurable). It is integrated via the viruscan apis. Virus scanning is an optional capability, and by default is enab...

  • Page 33: Security

    Security storage management applications have often been characterized as the biggest security loophole in a secure data environment. Once the data leaves the confines of the physical system environment by way of a backup or data migration, the data security policies and procedures often do not foll...

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    Encryption netbackup protects critical data from unauthorized access and tampering while in transit as well as when it is resident on backup media. Netbackup performs the data encryption on the client, transfers the data across the network and stores it on tape in the encrypted format. On restores, ...

  • Page 35: Device and Media Management

    Device and media management one of the most impressive features of veritas netbackup is the media manager. This powerful software manages the wide array of tape and optical storage devices and media supported by veritas netbackup. Media manager is also easy to configure and administer, thanks to a g...

  • Page 36

    The device manager always uses the volume database to get information about the volume. If the request involves a robot, this information includes the specific robot that has the volume and the slot location of the volume within the robot. The device then issues a mount command to the robotic daemon...

  • Page 37

    Figure 26 – sharing tape drive resources between netbackup servers. Sharing tape libraries veritas media manager, included with netbackup, provides the capability for multiple backup servers to share a multi-drive tape library. One netbackup server acts as the “robotics controller,” and other netbac...

  • Page 38

    Libraries attached to a “ndmp media server” (direct-attached to the nas ndmp host) can also be shared between multiple ndmp nas servers and one or more netbackup servers, as shown in figure 28 below. Drive sharing is not supported for ndmp nas hosts. As with the netbackup server case above, the libr...

  • Page 39

    The administrator can also generate reports that show: • what is physically in a robot? • discrepancies between what is physically in a robot and what is shown in the volume database. Scratch pools media manager enables administrators to configure/enable scratch pools. When applications such as veri...

  • Page 40

    Verifying media a verification option allows the administrator to read netbackup media and compare its contents to the online catalog of information in veritas netbackup. Duplicating netbackup media by using the duplicate option, an administrator can create a second copy of media containing veritas ...

  • Page 41: Administration And Use

    Administration and use veritas netbackup and media manager provide a comprehensive and logically designed set of interfaces that make it easy to perform all required administration, backup, or restore tasks. There are gui (graphical user interface), menu-driven, and command line versions of most int...

  • Page 42

    Figure 30 is a screen from the veritas netbackup windows administrator interface. The administrator uses this particular screen to view, modify, or add backup schedules to the veritas netbackup configuration. Double-clicking on any of the schedules in the right hand window enables the administrator ...

  • Page 43

    Other screens allow the administrator to configure media for use under media manager or to perform other tasks related to media manager configuration and administration. A site administrator can even define custom menus and menu commands for the administrator graphical user interfaces. These menus w...

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    Figure 33: user interface window for restoring files. Installation it is possible to install and configure veritas netbackup on stand-alone systems or on heterogeneous client/server networks supporting hundreds of clients. The administrator first installs software on the master server, then on media...

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    W w w . V e r i t a s . C o m p a g e 43 v e r i t a s n e t b a c k u p r e l e a s e 3 . 4 te c h n i c a l o v e r v i e w figure 34: unix client software installation. Configuration during initial configuration, the administrator can start with the default options, which were carefully chosen to...

  • Page 46

    Activity monitoring the veritas netbackup activity monitor allows administrators to monitor progress and status of backup and archive jobs. Figure 35 shows the job window with statistics about a selected job. Job control is also provided in that the administrator can kill jobs, which is useful in co...

  • Page 47

    Progress logs progress logs on the client allow easy monitoring of all user backup, archive, and restore operations. By creating a separate progress log for each user-directed backup, archive, or restore, users can monitor these operations and detect any problems that may occur. Client users can als...

  • Page 48

    Internal databases veritas netbackup and media manager provide interactive online access to all of the internal database information needed to manage its operations efficiently. There are four netbackup databases: configuration, file, error, and media. The media database is the only type not stored ...

  • Page 49: Summary

    Summary veritas netbackup brings the same level of storage management support to the world of open systems as is found in traditional centralized mainframe installations. It is possible to fully automate file backup and archive schedules across entire networks. Client users are more productive becau...

  • Page 50: Appendix A

    Appendix a frequently asked questions does veritas netbackup provide full automation for backup and restore operations without operator intervention? Yes. Operational involvement is not required if peripherals are configured and the needed media is online. Backups are performed by a scheduler proces...

  • Page 51

    How much data can veritas netbackup back up to a single peripheral in an 8-hour shift? This depends on the sustained transfer rate achieved. For a file system backup to an 8500xl, the following calculations indicate the aggregate data you could back up in eight hours at typical transfer rates: • 8.6...

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    Do you support the automatic scheduling of cleaning cartridges in robotic peripherals? Media manager not only supports automatic cleaning schedules in robotic tape peripherals but also tracks cleaning and usage information for devices that do not have mountable cleaning cartridges. How does veritas ...

  • Page 53: Appendix B

    Appendix b glossary administrator: a user granted special privileges to configure, install, and manage veritas netbackup. Archive: duplicating a primary storage file in secondary storage, then deleting the file from primary storage. Performed in order to retain data for a long period of time (see “b...

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    Menu interface: the administrator or client-based user interface provided by veritas netbackup for individuals who do not have gui capabilities (see “graphical user interface,” “command line interface”). Multiple volume device: a physical storage device not requiring manual intervention to change vo...

  • Page 55: Appendix C

    Appendix c client backup coverage utility the client coverage backup utility can produce three reports that gather various types of information about the clients being backed up by the server. The reports are: • system backup coverage report • class hardware/os report • hosts report the file system ...

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    K a n g a s u n 4 / s o l a r i s 2 . 6 * p i g l e t s u n 4 / s o l a r i s 2 . 6 p o o h s u n 4 / s o l a r i s 2 . 6 r o o s u n 4 / s o l a r i s 2 t i g g e r s u n 4 / s o l a r i s 2 . 6 h o s t s r e p o r t - - - - - - - - - - - - k e y : y e s - i n a n e t b a c k u p c l a s s n o - n ...

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    Verit as white p aper © copyright 2000 veritas software corporation. All rights reserved. Veritas, veritas software, the veritas logo, business without interruption, veritas, the data availability company, veritas backup exec, veritas netbackup, veritas netbackup businesserver, veritas netbackup fla...