1) We installed ZFS onto our Solaris 10 T2000 3 months ago. I have been
told our ZFS code is downrev. What is the recommended way to upgrade ZFS
on a production system (we want minimum downtime)? Can it safely be
done without affecting our 3.5 million files?
2) We did not turn on compression as most of our 3+ million files are
already gzipped. What is the performance penalty of having compression
on (both read and write numbers)? Is there advantage to compressing
already gzipped files? Should compression be the default when installing
ZFS? Nearly all our files are ASCII.
here is some info on our machine
itsm-mpk-2% showrev
Hostname: itsm-mpk-2
Hostid: 83d8d784
Release: 5.10
Kernel architecture: sun4v
Application architecture: sparc
Hardware provider: Sun_Microsystems
Domain:
Kernel version: SunOS 5.10 Generic_118833-08
T2000 32x1000mhz, 16gigs RAM.
# zpool status
pool: canary
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
canary ONLINE 0 0 0
c1t0d0s3 ONLINE 0 0 0
errors: No known data errors
# zpool iostat 1
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
canary 42.0G 12.0G 169 223 8.92M 1.39M
canary 42.0G 12.0G 0 732 0 3.05M
canary 42.0G 12.0G 0 573 0 2.47M
canary 42.0G 12.0G 0 515 0 2.22M
canary 42.0G 12.0G 0 680 0 3.11M
canary 42.0G 12.0G 0 620 0 2.80M
canary 42.0G 12.0G 0 687 0 2.85M
canary 42.0G 12.0G 0 568 0 2.40M
canary 42.0G 12.0G 0 688 0 2.91M
canary 42.0G 12.0G 0 634 0 2.75M
canary 42.0G 12.0G 0 625 0 2.61M
canary 42.0G 12.0G 0 700 0 2.96M
canary 42.0G 12.0G 0 733 0 3.19M
canary 42.0G 12.0G 0 639 0 2.76M
canary 42.0G 12.0G 1 573 127K 2.89M
canary 42.0G 12.0G 0 652 0 2.48M
canary 42.0G 12.0G 0 713 63.4K 3.55M
canary 42.0G 12.0G 117 355 7.83M 782K
canary 42.0G 12.0G 43 616 2.97M 1.11M
canary 42.0G 12.0G 128 424 8.60M 1.57M
canary 42.0G 12.0G 288 151 18.9M 795K
canary 42.0G 12.0G 364 0 23.9M 0
canary 42.0G 12.0G 387 0 25.6M 0
thanks
sean
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