|
Re: Performance issues
2008-09-25 12:06:01
On Thu, 25 Sep 2008 at 4:42pm, Jamie Penman-Smithson wrote
The holding disk is on a local [lowly] IDE drive. The data being
backed up is on the whole comprised relatively large (couple of gig)
files stored on SAN over fibre. At first I thought that the adverse
Have you benchmarked the SAN from this host independent of amanda? Try
something like bonnie++ or even just 'tar cO /foo | cat > /dev/null'.
performance was due to the IDE disk, however after disabling the
holding disk it actually takes 4 hours longer to complete. I've
If you can't read from the SAN fast enough to keep the tape streaming,
then it *would* take even longer without a holding disk.
considered using memory (/dev/shm) as a holding disk, however this is
only 500 MB and I'm not sure if having such a small holding disk would
make any difference.
Nope. The holding disk needs to be big enough to store the whole backup
image.
The tape drive is part of an IBM TotalStorage 3582 tape library.
LTO1?
--
Joshua Baker-LePain
QB3 Shared Cluster Sysadmin
UCSF
|
|
|
