Ralf,
In addition to what Paul said, I've begun (after advice from amanda-users)
to use amplot, it'll give a good visual that may help to spot the problem.
On Wed, Jan 26, 2005 at 11:43:59AM +0100, Paul Bijnens wrote:
> ralf.lebeda AT ezi DOT de wrote:
> >
> > what could be the reason for a very very slow backup?
>
> Actually, I have no idea. Just a few remarks.
>
>
> >
> > My backup server is a celeron 500 with 128 MB memory and a tandberg slr 24
> > tape box.
> > My network is 100MB switched.
> > The gamma client is a 800 MHz PIII system.
> > The dv-02 client is a 1,2 GHz Athlon system.
>
> My backup server is a celeron 300 MHz with 128 MB memory.
> And I get a much larger throughput.
> So it's not the servers capacity, neither the clients.
>
>
> >
> > I have no explanation for this slowness. If I copy a big file with scp from
> > gamma to backup server it is normal speed.
>
> Also when you're copy from two different hosts at the same time?
> A frequent error is a duplex mismatch on the switches; but that
> would also be noticed when copying a large file from one host.
> Just a tought...
> Does "netstat -ni" have a large value in the error columns
> on client and/or server?
>
>
> > Bythe way the backupjob on gamm was only one iso image file.
>
> Was that gnutar or dump?
> Is the first time you make a backup? or was it fast before and
> suddenly slow?
> Do you have some clients where the problem does not exist?
> Any strange message in the debug-files on client:
> /tmp/amanda/*.<datetimestamp>.debug .
> Was there any other activity on the clients?
> Was there some non-responding nfs-directory on the clients (which
> tar has to stat to find out it is an nfs-directory and skip it).
> Is there anything else between the server and client? firewall
> with misconfigured traffic-shaper, etc...?
>
> When this backup is running, can you find out what the
> dump/tar on the client is doing? (strace, truss, lsof...)
>
>
> >
> > Thanks and Rgds
> > Ralf
> >
> >
> >
> > STATISTICS:
> > Total Full Daily
> > -------- -------- --------
> > Estimate Time (hrs:min) 0:00
> > Run Time (hrs:min) 26:59
> > Dump Time (hrs:min) 51:53 51:53 0:00
> > Output Size (meg) 1444.5 1444.5 0.0
> > Original Size (meg) 1444.5 1444.5 0.0
> > Avg Compressed Size (%) -- -- --
> > Filesystems Dumped 2 2 0
> > Avg Dump Rate (k/s) 7.9 7.9 --
> >
> > Tape Time (hrs:min) 0:16 0:16 0:00
> > Tape Size (meg) 1444.5 1444.5 0.0
> > Tape Used (%) 12.0 12.0 0.0
> > Filesystems Taped 2 2 0
> > Avg Tp Write Rate (k/s) 1517.3 1517.3 --
> >
> > USAGE BY TAPE:
> > Label Time Size % Nb
> > LXBACK127 0:16 1444.5 12.0 2
> >
> >
> > NOTES:
> > taper: tape LXBACK127 kb 1479232 fm 2 [OK]
> >
> >
> > DUMP SUMMARY:
> > DUMPER STATS TAPER STATS
> > HOSTNAME DISK L ORIG-KB OUT-KB COMP% MMM:SS KB/s MMM:SS KB/s
> > -------------------------- --------------------------------- ------------
> > dv-02 -OpenOffice 0 821180 821180 -- 1502:31 9.1 9:011517.2
> > gamma -amandatest 0 657970 657970 -- 1610:41 6.8 7:141517.4
>
> Use the "columnspec" parameter in amanda.conf to add some spaces between
> the columns.
>
>
> >
> > (brought to you by Amanda version 2.4.4p3)
> >
> >
> >
>
>
> --
> Paul Bijnens, Xplanation Tel +32 16 397.511
> Technologielaan 21 bus 2, B-3001 Leuven, BELGIUM Fax +32 16 397.512
> http://www.xplanation.com/ email: Paul.Bijnens AT xplanation DOT com
> ***********************************************************************
> * I think I've got the hang of it now: exit, ^D, ^C, ^\, ^Z, ^Q, F6, *
> * quit, ZZ, :q, :q!, M-Z, ^X^C, logoff, logout, close, bye, /bye, *
> * stop, end, F3, ~., ^]c, +++ ATH, disconnect, halt, abort, hangup, *
> * PF4, F20, ^X^X, :D::D, KJOB, F14-f-e, F8-e, kill -1 $$, shutdown, *
> * kill -9 1, Alt-F4, Ctrl-Alt-Del, AltGr-NumLock, Stop-A, ... *
> * ... "Are you sure?" ... YES ... Phew ... I'm out *
> ***********************************************************************
>
>
---
Brian R Cuttler brian.cuttler AT wadsworth DOT org
Computer Systems Support (v) 518 486-1697
Wadsworth Center (f) 518 473-6384
NYS Department of Health Help Desk 518 473-0773
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