Hi all,
while setting of our X4140 I have - following suggestions - added two
SSDs as log devices as follows
zpool add tank log c1t6d0 c1t7d0
I currently have
pool: rpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t0d0s0 ONLINE 0 0 0
c1t1d0s0 ONLINE 0 0 0
errors: No known data errors
pool: tank
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t2d0 ONLINE 0 0 0
c1t3d0 ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t4d0 ONLINE 0 0 0
c1t5d0 ONLINE 0 0 0
logs
c1t6d0 ONLINE 0 0 0
c1t7d0 ONLINE 0 0 0
errors: No known data errors
We have performance problems especially with FrontBase (relational
database) running on this ZFS configuration and need to look for
optimizations.
• I would like to remove the two SSDs as log devices from the pool and
instead add them as a separate pool for sole use by the database to
see how this enhences performance. I could certainly do
zpool detach tank c1t7d0
to remove one disk from the log mirror. But how can I get back the
second SSD?
Any experiinces with running database on ZFS pools? What can I do to
tune the performance? Smaller block size may be?
Thanks a lot,
Andreas
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