Hi all.
I'm new to ZFS, and I have just installed my first ZFS pools and file systems.
My Oracle DBA tells me that he's seeing poor performance and would like to go
back to VxFS.
Here's my hardware:
Sun E4500 with Solaris 10, 08/07 release. SAN attached through a Brocade
switch to EMC CX700. There is one LUN per file system. Here are the file
systems:
# df -h
Filesystem size used avail capacity Mounted on
/dev/md/dsk/d0 2.0G 142M 1.8G 8% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 194M 1.2M 192M 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object
/dev/md/dsk/d9 3.9G 3.1G 827M 80% /usr
fd 0K 0K 0K 0% /dev/fd
/dev/md/dsk/d12 2.0G 403M 1.5G 21% /var
swap 194M 1.6M 192M 1% /tmp
swap 192M 32K 192M 1% /var/run
/dev/md/dsk/d6 2.0G 1.2G 728M 63% /opt
r12_oApps 78G 55G 23G 71% /opt/a01/oakwcr12
r12_data/d01 44G 42G 2.0G 96% /opt/d01/oakwcr12
r12_data/d02 42G 40G 2.1G 95% /opt/d02/oakwcr12
r12_data/d03 42G 40G 2.1G 95% /opt/d03/oakwcr12
r12_data/d04 44G 40G 3.7G 92% /opt/d04/oakwcr12
r12_data/d05 42G 33G 9.1G 79% /opt/d05/oakwcr12
r12_data/d06 42G 40G 2.4G 95% /opt/d06/oakwcr12
r12_data/d07 42G 31G 11G 75% /opt/d07/oakwcr12
r12_data/d08 42G 40G 1.7G 96% /opt/d08/oakwcr12
r12_data/d09 42G 40G 1.8G 96% /opt/d09/oakwcr12
r12_data/d10 44G 42G 2.5G 95% /opt/d10/oakwcr12
r12_data/d11 42G 39G 3.3G 93% /opt/d11/oakwcr12
r12_data/d12 42G 13G 29G 33% /opt/d12/oakwcr12
r12_data/d21 42G 37G 5.4G 88% /opt/d21/oakwcr12
r12_data/d22 42G 40G 1.9G 96% /opt/d22/oakwcr12
r12_data/d23 42G 40G 2.2G 95% /opt/d23/oakwcr12
r12_data/d24 42G 40G 2.1G 95% /opt/d24/oakwcr12
r12_logz 14G 24K 14G 1% /opt/l01/oakwrc12
r12_product 19G 4.7G 14G 26% /opt/p01/oakwcr12
r12_oWork 39G 28K 39G 1% /opt/w01/oakwcr12
#
Here are the record sizes:
# zfs get recordsize
NAME PROPERTY VALUE SOURCE
r12_data recordsize 8K local
r12_data/d01 recordsize 8K local
r12_data/d02 recordsize 8K local
r12_data/d03 recordsize 8K local
r12_data/d04 recordsize 8K local
r12_data/d05 recordsize 8K local
r12_data/d06 recordsize 8K local
r12_data/d07 recordsize 8K local
r12_data/d08 recordsize 8K local
r12_data/d09 recordsize 8K local
r12_data/d10 recordsize 8K local
r12_data/d11 recordsize 8K local
r12_data/d12 recordsize 8K local
r12_data/d21 recordsize 8K local
r12_data/d22 recordsize 8K local
r12_data/d23 recordsize 8K local
r12_data/d24 recordsize 8K local
r12_logz recordsize 128K default
r12_oApps recordsize 128K default
r12_oWork recordsize 128K default
r12_product recordsize 128K default
#
Doing some performance tests I see this:
# time dd if=/dev/zero of=test.dbf bs=8k count=1048576
1048576+0 records in
1048576+0 records out
real 6:29.9
user 6.2
sys 3:26.1
# time dd if=test.dbf of=/dev/null bs=8k
1048576+0 records in
1048576+0 records out
real 3:06.4
user 5.5
sys 1:26.9
#
Here are the pools on the system:
# sudo zpool status
pool: r12_data
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
r12_data ONLINE 0 0 0
c9t5006016B306005AAd4 ONLINE 0 0 0
c9t5006016B306005AAd5 ONLINE 0 0 0
c9t5006016B306005AAd6 ONLINE 0 0 0
c9t5006016B306005AAd7 ONLINE 0 0 0
c9t5006016B306005AAd8 ONLINE 0 0 0
c9t5006016B306005AAd9 ONLINE 0 0 0
c9t5006016B306005AAd10 ONLINE 0 0 0
c9t5006016B306005AAd11 ONLINE 0 0 0
c9t5006016B306005AAd12 ONLINE 0 0 0
c9t5006016B306005AAd13 ONLINE 0 0 0
c9t5006016B306005AAd14 ONLINE 0 0 0
c9t5006016B306005AAd15 ONLINE 0 0 0
c9t5006016B306005AAd16 ONLINE 0 0 0
c9t5006016B306005AAd17 ONLINE 0 0 0
c9t5006016B306005AAd18 ONLINE 0 0 0
c9t5006016B306005AAd19 ONLINE 0 0 0
c0t5d0 ONLINE 0 0 0
c2t13d0 ONLINE 0 0 0
errors: No known data errors
pool: r12_logz
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
r12_logz ONLINE 0 0 0
c9t5006016B306005AAd1 ONLINE 0 0 0
errors: No known data errors
pool: r12_oApps
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
r12_oApps ONLINE 0 0 0
c9t5006016B306005AAd2 ONLINE 0 0 0
errors: No known data errors
pool: r12_oWork
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
r12_oWork ONLINE 0 0 0
c9t5006016B306005AAd3 ONLINE 0 0 0
errors: No known data errors
pool: r12_product
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
r12_product ONLINE 0 0 0
c9t5006016B306005AAd0 ONLINE 0 0 0
errors: No known data errors
#
I thought that I would see better performance than this. I've read a lot of
the blogs, tried tuning this, and still no performance gains. Are these speeds
normal? Did I miss something (or somethings)? Thanks for any help!
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