Lowered speed of backup (ufsdump)

From: przemol (przemolicc_at_poczta.fm)
Date: 12/28/04

  • Next message: rob.de.langhe_at_belgacom.be: "Known issues when upgrading VxVM from 3.1.1, 3.1 and 3.2 to 3.5 ?" 
    Date: Tue, 28 Dec 2004 14:35:23 +0100
To: sunmanagers@sunmanagers.org

    Sparc server + Solaris 9. There is daily backup at the server done using ufsdump.
    But for a few days I noticed that speed of the backup (reported by ufsdump itself)
    is lowered, that is at the end of its work ufsdump shows:
      DUMP: 95.82% done, finished in 0:18
      DUMP: 97.42% done, finished in 0:11
      DUMP: 99.57% done, finished in 0:01
      DUMP: 118524734 blocks (57873.41MB) on 1 volume at 2182 KB/sec

    When I looked at log of each backup I noticed:
    DUMP: 115871358 blocks (56577.81MB) on 1 volume at 3659 KB/sec
    DUMP: 117732798 blocks (57486.72MB) on 1 volume at 3846 KB/sec
    DUMP: 119616190 blocks (58406.34MB) on 1 volume at 3593 KB/sec
    DUMP: 119345214 blocks (58274.03MB) on 1 volume at 3511 KB/sec
    DUMP: 120715710 blocks (58943.22MB) on 1 volume at 3717 KB/sec
    DUMP: 119813182 blocks (58502.53MB) on 1 volume at 3513 KB/sec
    DUMP: 117722302 blocks (57481.59MB) on 1 volume at 3530 KB/sec
    DUMP: 117993406 blocks (57613.97MB) on 1 volume at 3770 KB/sec
    DUMP: 119807230 blocks (58499.62MB) on 1 volume at 3836 KB/sec
    DUMP: 122314878 blocks (59724.06MB) on 1 volume at 3606 KB/sec
    DUMP: 122046270 blocks (59592.91MB) on 1 volume at 3579 KB/sec
    DUMP: 122824574 blocks (59972.94MB) on 1 volume at 2110 KB/sec <<<<<< !!!
    DUMP: 121487230 blocks (59319.94MB) on 1 volume at 2301 KB/sec
    DUMP: 118413054 blocks (57818.87MB) on 1 volume at 2078 KB/sec
    DUMP: 118743486 blocks (57980.22MB) on 1 volume at 2155 KB/sec
    DUMP: 120442174 blocks (58809.66MB) on 1 volume at 2224 KB/sec
    DUMP: 123470142 blocks (60288.16MB) on 1 volume at 2127 KB/sec
    DUMP: 125308350 blocks (61185.72MB) on 1 volume at 2103 KB/sec
    DUMP: 123020222 blocks (60068.47MB) on 1 volume at 2112 KB/sec
    DUMP: 120073982 blocks (58629.87MB) on 1 volume at 2040 KB/sec
    DUMP: 116689406 blocks (56977.25MB) on 1 volume at 2156 KB/sec
    DUMP: 118524734 blocks (57873.41MB) on 1 volume at 2182 KB/sec

    Can someone explain me why it could slow down so much ? How can I diagnose it ?
    How can I find what caused the problem ?

    przemol
    _______________________________________________
    sunmanagers mailing list
    sunmanagers@sunmanagers.org
    http://www.sunmanagers.org/mailman/listinfo/sunmanagers

  • Next message: rob.de.langhe_at_belgacom.be: "Known issues when upgrading VxVM from 3.1.1, 3.1 and 3.2 to 3.5 ?"

    Relevant Pages

    • ufsdump:error in ftw
      ... I'm trying to make a backup to a tape drive on a sun blade 100 with ... But I've got the problem that ufsdump gives me an error when I'm trying ... DUMP: Writing 32 Kilobyte records ...
      (comp.unix.solaris)
    • Re: Backup Failing
      ... While I am taking backup using ufsdump, ... DUMP: Date of last level 0 dump: the epoch ... Your tape couldn't be written. ...
      (comp.unix.solaris)
    • [Summary] ufsdump, solaris 9 & RBAC not working correctly
      ... server, and I don't want to have root logging in on the remote server, I ... etc. and key exchange setup for backup user. ... ufsdump, solaris 9 & RBAC not working correctly ... I thought suid was suid. ...
      (SunManagers)
    • SUMMARY: ufsdump breaks nfs server
      ... many thanks to people responding (6 responses) all responses were very ... to continue to use ufsdump, ... give you a consistent view of the disks at the time the backup is made, ... I am not an NFS expert, ...
      (SunManagers)
    • Re: Backup a entire System
      ... So I should do an ufsdump image for each partition, ... > available backup media, available time windows ...
      (comp.unix.solaris)