Veritas NetBackup™ Commands Reference Guide

Last Published:
Product(s): NetBackup (8.0)
  1. Introduction
    1.  
      About NetBackup commands
    2.  
      Navigating multiple menu levels
    3.  
      NetBackup command conventions
    4.  
      NetBackup Media Manager command notes
  2. Appendix A. NetBackup Commands
    1.  
      acsd
    2.  
      add_media_server_on_clients
    3.  
      backupdbtrace
    4.  
      backuptrace
    5.  
      bmrc
    6.  
      bmrconfig
    7.  
      bmrepadm
    8.  
      bmrprep
    9.  
      bmrs
    10.  
      bmrsrtadm
    11.  
      bp
    12.  
      bparchive
    13.  
      bpbackup
    14.  
      bpbackupdb
    15.  
      bpcatarc
    16.  
      bpcatlist
    17.  
      bpcatres
    18.  
      bpcatrm
    19.  
      bpcd
    20.  
      bpchangeprimary
    21.  
      bpclient
    22.  
      bpclimagelist
    23.  
      bpclntcmd
    24.  
      bpclusterutil
    25.  
      bpcompatd
    26.  
      bpconfig
    27.  
      bpdbjobs
    28.  
      bpdbm
    29.  
      bpdgclone
    30.  
      bpdown
    31.  
      bpduplicate
    32.  
      bperror
    33.  
      bpexpdate
    34.  
      bpfis
    35.  
      bpflist
    36.  
      bpgetconfig
    37.  
      bpgetdebuglog
    38.  
      bpimage
    39.  
      bpimagelist
    40.  
      bpimmedia
    41.  
      bpimport
    42.  
      bpinst
    43.  
      bpkeyfile
    44.  
      bpkeyutil
    45.  
      bplabel
    46.  
      bplist
    47.  
      bpmedia
    48.  
      bpmedialist
    49.  
      bpminlicense
    50.  
      bpnbat
    51.  
      bpnbaz
    52.  
      bppficorr
    53.  
      bpplcatdrinfo
    54.  
      bpplclients
    55.  
      bppldelete
    56.  
      bpplinclude
    57.  
      bpplinfo
    58.  
      bppllist
    59.  
      bpplsched
    60.  
      bpplschedrep
    61.  
      bppolicynew
    62.  
      bpps
    63.  
      bprd
    64.  
      bprecover
    65.  
      bprestore
    66.  
      bpretlevel
    67.  
      bpschedule
    68.  
      bpschedulerep
    69.  
      bpsetconfig
    70.  
      bpstsinfo
    71.  
      bpstuadd
    72.  
      bpstudel
    73.  
      bpstulist
    74.  
      bpsturep
    75.  
      bptestbpcd
    76.  
      bptestnetconn
    77.  
      bptpcinfo
    78.  
      bpup
    79.  
      bpverify
    80.  
      cat_convert
    81.  
      cat_export
    82.  
      cat_import
    83.  
      configurePorts
    84.  
      create_nbdb
    85.  
      csconfig
    86.  
      duplicatetrace
    87.  
      importtrace
    88.  
      jbpSA
    89.  
      jnbSA
    90.  
      ltid
    91.  
      mklogdir
    92.  
      nbauditreport
    93.  
      nbcatsync
    94.  
      NBCC
    95.  
      NBCCR
    96.  
      nbcertcmd
    97.  
      nbcertupdater
    98.  
      nbcomponentupdate
    99.  
      nbcplogs
    100.  
      nbdb_admin
    101.  
      nbdb_backup
    102.  
      nbdb_move
    103.  
      nbdb_ping
    104.  
      nbdb_restore
    105.  
      nbdb_unload
    106.  
      nbdbms_start_server
    107.  
      nbdbms_start_stop
    108.  
      nbdc
    109.  
      nbdecommission
    110.  
      nbdelete
    111.  
      nbdeployutil
    112.  
      nbdevconfig
    113.  
      nbdevquery
    114.  
      nbdiscover
    115.  
      nbdna
    116.  
      nbemm
    117.  
      nbemmcmd
    118.  
      nbexecute
    119.  
      nbfindfile
    120.  
      nbfirescan
    121.  
      nbftadm
    122.  
      nbftconfig
    123.  
      nbgetconfig
    124.  
      nbhba
    125.  
      nbholdutil
    126.  
      nbhypervtool
    127.  
      nbjm
    128.  
      nbkmsutil
    129.  
      nboraadm
    130.  
      nbpem
    131.  
      nbpemreq
    132.  
      nbperfchk
    133.  
      nbplupgrade
    134.  
      nbrb
    135.  
      nbrbutil
    136.  
      nbregopsc
    137.  
      nbreplicate
    138.  
      nbrestorevm
    139.  
      nbseccmd
    140.  
      nbsetconfig
    141.  
      nbsnapimport
    142.  
      nbsnapreplicate
    143.  
      nbsqladm
    144.  
      nbstl
    145.  
      nbstlutil
    146.  
      nbsu
    147.  
      nbsvrgrp
    148.  
      resilient_clients
    149.  
      restoretrace
    150.  
      stopltid
    151.  
      tl4d
    152.  
      tl8d
    153.  
      tl8cd
    154.  
      tldd
    155.  
      tldcd
    156.  
      tlhd
    157.  
      tlhcd
    158.  
      tlmd
    159.  
      tpautoconf
    160.  
      tpclean
    161.  
      tpconfig
    162.  
      tpext
    163.  
      tpreq
    164.  
      tpunmount
    165.  
      verifytrace
    166.  
      vltadm
    167.  
      vltcontainers
    168.  
      vlteject
    169.  
      vltinject
    170.  
      vltoffsitemedia
    171.  
      vltopmenu
    172.  
      vltrun
    173.  
      vmadd
    174.  
      vmchange
    175.  
      vmcheckxxx
    176.  
      vmd
    177.  
      vmdelete
    178.  
      vmoprcmd
    179.  
      vmphyinv
    180.  
      vmpool
    181.  
      vmquery
    182.  
      vmrule
    183.  
      vmupdate
    184.  
      vnetd
    185.  
      vxlogcfg
    186.  
      vxlogmgr
    187.  
      vxlogview
    188.  
      W2KOption

Name

nbperfchk — Measures a disk array's read and write speeds.

SYNOPSIS

nbperfchk -i inputpath -o outputpath [-s filesize] [-syncend] [-bs buffersize]

 

On UNIX systems, the directory path to this command is /usr/openv/netbackup/bin/support/

On Windows systems, the directory path to this command is <install_path>\NetBackup\bin\support\

DESCRIPTION

The nbperfchk command measures the read speed and write speed of a disk array. You can use this command to test the read speed and the write speed of the disks that host deduplicated data. For example, you can measure the speeds of the disks that host deduplicated data as follows:

  • In a PureDisk storage pool, use this command to measure the speed of disks attached to the content router.

  • In a NetBackup media server deduplication pool (MSDP), use this command to measure the speed of the disks attached to the media server. The media server can be running any operating system that Veritas supports for media servers and MSDPs.

Note:

Veritas recommends that you work with a Veritas technical support staff member when you run this command and interpret its results. Veritas recommends a minimum disk performance level of 130 MB/sec for deduplicated read and write operations.

The nbperfchk utility enables you to write a test file to a disk, read back that test file, and observe the read speeds attained during the read operation. You can use the results from nbperfchk to make sure that the ReadBufferSize parameter is set appropriately in your backup environment. The ReadBufferSize parameter resides in the [CRDataStore] section of the contentrouter.cfg file. You can use this command as follows:

  • Use the following command to write data to the disks:

    nbperfchk -i inputpath -o outputpath -s filesize -syncend

  • Use the following command to read data from the disks:

    nbperfchk -i inputpath -o outputpath -bs buffersize

OPTIONS

-i inputpath

For inputpath, specify the full path to an input file. The nbperfchk command reads this file and generates information about the read speed when this file is read to disk.

For example, you can specify the following to read in a file that contains all zero characters (0x00) from the /dev/zero:

-o outputpath

For outputpath, specify the full path to an output file. The nbperfchk command creates this file.

For example, on writes, specify the path to the output file that you want to create. On reads, specify -o NULL to discard all the output as it is generated.

-s filesize

For filesize, specify a file size that is equal to or larger than tha combined memory size of your computer plus the amount in the disk array. A file of this size ensures that the data is written to disk and not to a buffer.

-syncend

The syncend parameter flushes the buffer and writes all data to disk.

-bs buffersize

For buffersize, specify the read buffer size to use when nbperfchk runs. For example, 64k or 128k.

PROCEDURES

To analyze nbperfchk results and adjust the ReadBufferSize parameter setting

  1. Log in as the root user (UNIX) or the administrator (Windows) on the computer that hosts the content router.

    In PureDisk environments, log into the storage pool authority node or storage pool authority appliance.

    In NetBackup environments, log into the media server.

  2. Change to a test directory.
  3. Type the nbperfchk command in the following format to write a large test file to the content router:
    nbperfchk -i inputpath -o outputpath -s filesize -syncend

    For example, the following command writes a 64 GB data file that contains all zeros to the e drive:

    nbperfchk -i zero: -o e:\data1 -s 64g -syncend
    
  4. Type the nbperfchk command in the following format to read the test file and observe the read speeds in the nbperfchk output:
    nbperfchk -i inputpath -o NULL -bs buffersize

    Example 1. To observe several read speeds, with several buffer sizes, type the following series of commands:

    nbperfchk -i e:\data1 -bs 64k -o NULL
    nbperfchk -i e:\data1 -bs 128k -o NULL
    nbperfchk -i e:\data1 -bs 256k -o NULL

    Example 2. The following nbperfchk command reads back the data in file data1 and uses a buffer size of 1024 K:

    C:\Users\administrator.mymediaserver\Desktop>nbperfchk -i e:\data1 -bs 1024k -o NULL
         195 MB @   65.3 MB/sec,      194 MB @   64.9 MB/sec
         295 MB @   49.4 MB/sec,      100 MB @   33.5 MB/sec
         403 MB @   44.8 MB/sec,      108 MB @   35.8 MB/sec
         505 MB @   42.1 MB/sec,      102 MB @   34.1 MB/sec
         599 MB @   40.0 MB/sec,       94 MB @   31.3 MB/sec
         705 MB @   39.2 MB/sec,      106 MB @   35.5 MB/sec
         821 MB @   39.2 MB/sec,      116 MB @   38.8 MB/sec
         943 MB @   39.4 MB/sec,      122 MB @   40.8 MB/sec
        1024 MB @   40.1 MB/sec

    Observe the following when you analyze the data:

    • The left two columns show the amount of data read and the average read speed.

    • The final line shows the overall read speed. This is the most important line in this output because it shows you how fast the total read occurred with the buffer size you specified.

    • The right two columns show the average read speed in the last 3 seconds of each read. Unless these numbers vary drastically from read to read, you can disregard the right two columns.

  5. Analyze your read speeds and adjust the ReadBufferSize parameter if necessary.

    Your operating system, your disk speeds, and the ReadBufferSize parameter setting all affect restore and rehydration performance.

    Veritas recommends that you type several nbperfchk commands and increase the size of the argument to the -bs parameter each time. Example 1 in step 4 shows this method. If you can enter ever-increasing arguments to the -bs parameter, you can probably increase the size of the ReadBufferSize parameter in the [CRDataStore] section of the contentrouter.cfg file.

    By default, ReadBufferSize=65536, which is 64K. Veritas testing shows that ReadBufferSize=1048576, which is 1024 X 1024, or 1M, offers good performance on most Windows systems. On most UNIX systems, Veritas testing shows that ReadBufferSize=65536 (the default) offers good performance.

    For information about how to edit NetBackup configuration files, see your NetBackup documentation.

    For information about how to edit PureDisk configuration files, see the PureDisk Administrator's Guide.