Try looking on the client while the backup is running. Could be any of a lot of things. Network problems (check for errors on the NIC and the switch port), lack of CPU to run the compression, disk I/O contention, huge numbers of files (either in aggregate or in a single directory), or possibly even impending disk failure (lots of read retries or a degraded RAID). Looking at something like 'top' during the backup should give you an idea of whether your CPU is overloaded or if you are always waiting for disk, and if there is some other process(es) running that may also be trying to do a lot of disk I/O. Your system logs should show if you are seeing disk errors, and the output of ifconfig or similar will show the error counts on the NIC. If you don't see anything obvious at first, try running your dump program (dump or tar or whatever Amanda is configured to use) with the output directed to /dev/null and see how long that takes, if that is also slow then it is not the network or Amanda. Then try it without compression to see how much that speeds things up.
Frank Tom Robinson wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Tom Robinson wrote: >> Hi, >> >> I'm running amanda (2.6.0p2-1) but have an older client running >> 2.4.2p2-1. On that client the full backup of a 4GB disk takes a very >> long time: >> >> DUMP SUMMARY: >> DUMPER >> STATS TAPER STATS >> HOSTNAME DISK L ORIG-KB OUT-KB COMP% >> MMM:SS KB/s MMM:SS KB/s >> ------------------------------------ >> ------------------------------------------ --------------- >> host / 0 4256790 1819411 42.7 >> 637:22 47.6 26:01 1165.9 >> >> I'm not sure where to start looking for this bottle-neck. >> >> Any clues would be appreciated. > bump > > - -- > > Tom Robinson > System Administrator > > MoTeC > > 121 Merrindale Drive > Croydon South > 3136 Victoria > Australia > > T: +61 3 9761 5050 > F: +61 3 9761 5051 > M: +61 4 3268 7026 > E: [email protected] > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.5 (GNU/Linux) > Comment: Using GnuPG with CentOS - http://enigmail.mozdev.org/ > > iD8DBQFKnFXv+brnGjUTUjARAgcaAJ9mhqo4enmr/VSkjJ9k4n6lpUsU/ACg38ZL > EHyS6r23vri4I7azpfEk2BY= > =6ngI > -----END PGP SIGNATURE----- > -- Frank Smith [email protected] Sr. Systems Administrator Voice: 512-374-4673 Hoover's Online Fax: 512-374-4501
