Michael Packer wrote:
Hello,
When I start up amanda my load (which normally is very low) starts to climb.
I'm on RH Linux 8.0 dual xeon processor, 2 gig of memory. SCSI tape, raid array
on different channels... this high load continues for about 9-10 minutes
then it drops down to a load average of around 1.5.
You're proably having trouble with the estimate phase. Without seeing
the amanda.conf and dumptypes, I guess the machine runs more than one
estimate at the same time over different disks.
Try setting the spindle in your disktype (default = -1, meaning there
is no restriction on running parallel). You can set a spindle of 1
everywhere, so that no more than one estimate/backup runs at once.
Is this machine it's own tape server? If you have a decent switched
network, then it could help to put the tape on another machine.
My amanda-server is an old PC 300 Mhz Celeron, with 128 Mbyte RAM,
with a 80 Gbyte holdingdisk, and scsi tape, and runs up to 10 dumpers
in parallel. Load avg on the machine itself goes up to 12-15, but at
night nobody except amanda uses the machine.
But even that load avg does not make the machine unresponsive when
executing e.g. amstatus. Maybe it's not the load avg but the disk
trashing that is bogging the machine down. There is only one disk
in the system: add spindle number '1' to each DLE and then measure
the impact again.
HOSTNAME DISK L ORIG-KB OUT-KB COMP% MMM:SS KB/s
MMM:SS KB/s
----------------------- ---------------------------------------------
----------------
localhost sda2 0 569430 569440 -- 2:35 3672.4
5:12 1827.0
localhost sda3 0 17350 17376 -- 0:01 13180.3
0:07 2371.2
localhost sda5 0 32866640 32866656 -- 147:53 3703.9
147:54 3703.9
localhost sda7 0 494900 494912 -- 2:23 3454.6
1:52 4405.0
localhost sda8 0 286410 286432 -- 1:23 3430.3
1:05 4440.5
localhost sda9 0 11140 11168 -- 0:05 2033.3
0:04 2526.2
--
Paul @ Home
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