23.07.2012 21:59, Yuri Vorobyev пишет:
I faced with a strange performance problem with new disk shelf.
We a using ZFS system with SATA disks for a while.
What OS and release?
Oh. I forgot this important thing.
It is OpenIndiana oi_151a5 now.
New testing data:
I reboot to first boot environment with original io_151 dev installed
(without updates).
Read speed remains the same. About 150Mb/s.
Now something intresting. Booted to Centos 6.3 live CD
Create software raid10:
#mdadm -C /dev/md0 --level=raid10 --assume-clean --raid-devices=10
/dev/sdac /dev/sdad /dev/sdae /dev/sdaf /dev/sdag /dev/sdah /dev/sdai
/dev/sdaj /dev/sdak /dev/sdal
# dd if=/dev/zero of=zero bs=1M count=5000
5000+0 records in
5000+0 records out
5242880000 bytes (5.2 GB) copied, 9.50402 s, 552 MB/s
cleaning file system caches:
# free
total used free shared buffers cached
Mem: 99195228 6800076 92395152 0 22184 5269432
-/+ buffers/cache: 1508460 97686768
Swap: 0 0 0
# echo 3 > /proc/sys/vm/drop_caches
# free
total used free shared buffers cached
Mem: 99195228 1434564 97760664 0 1964 75988
-/+ buffers/cache: 1356612 97838616
Swap: 0 0 0
# dd if=zero of=/dev/null bs=1M
5000+0 records in
5000+0 records out
5242880000 bytes (5.2 GB) copied, 5.65738 s, 927 MB/s
iostat during reading here http://pastebin.com/rwd0LWdc
CentOS dmesg here https://dl.dropbox.com/u/12915469/centos_dmesg.txt
Sequential speed 6 times more than in OpenIndiana.
Seems like driver bug in mpt_sas? Remind you HBA is LSI 9205-8e (2308 chip).
LSI support answered me OpenIndiana not supported OS (who would doubt...)
What should i do? Go to time-tested LSI2008 HBA?
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