[Veritas-bu] HP-UX 11.0 and NBU 3.2
2001-04-04 11:26:40
Hey All-
We're running NBU 3.2 patch 466 on HP-UX 11.0 and we're seeing backup
performance that seems unduly slow.
NBU performance is, of course, a complex concept with lots of pieces that
could slow it down, but it looks pretty simply when I see the following
results of local writes to /dev/null:
#tar cf - /var > /dev/null
(writes at 18GB/hr)
#/usr/openv/netbackup/bin/bpbkar -dt 0 -r 888 -nocont /var > /dev/null
(writes at 8 GB/hr)
We have noticed that disabling JFS Asynchronous I/O (via "echo 1 >
/usr/openv/netbackup/AIO_READS_MAX") speeds up the above bpbkar to 11GB/hr.
And for what it's worth, I don't see an NBU slowdown when reading the raw
device:
#dd if=/dev/vg00/rlvol8 of=/dev/null bs=32768
(writes at 84 GB/hr)
#/usr/openv/netbackup/bin/bpbkar -dt 0 -r 888 -nocont /dev/vg00/rlvol8 >
/dev/null
(also writes at 84 GB/hr)
Has anyone else already trod this path?
TiA
rob
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