Cross-posting to the public ZFS discussion alias.
There's nothing here that requires confidentiallity, and
the public alias is a much broader audience with a larger
number of experienced ZFS users...
As to the issue - what is the free space disparity
across the pools? Is the one particular pool significantly
tighter on free space than the other pools ("zpool list")?
Thanks,
/jim
Nobel Shelby wrote:
Customer has many large zfs pools..He does the same on all pools:
Copying overnight large amounts of small files (1-5K).
All but one particular pool (that has been expanded) gives them this
problem:
--the copying within a few minutes crawls and the zpool looks
unresponsive.
Background:
He had to grow this particular pool twice over a period of time (it
was 6TB and it grew by 4TB twice-now it is 14TB)
Solaris was U4 but now is U6.
They have limited the arc:
set zfs:zfs_arc_max=0x100000000
and
zfs:zfs_nocacheflush=1 (they have a 6540 array).
Does expanding the pool affects performance and if so what is the best
way to recover
(other than rebuilding the pool)
Thanks,
-Nobel
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