Expected speeds for MSA on Linux

Mohan Wickramasinghe — Fri, 12 Nov 2010 16:25:15 GMT

Hello
I have a MSA 2000sa G2 with 3 volumes (RAID 10 - six 73GB SAS drives)

Using following multipath.conf

### The defaults section

defaults {
udev_dir /dev
polling_interval 20
selector "round-robin 0"
path_grouping_policy group_by_prio
getuid_callout "/lib/udev/scsi_id -g -u -s /block/%n"
prio_callout "/sbin/mpath_prio_alua /dev/%n"
rr_min_io 120
path_checker tur
rr_weight uniform
failback immediate
no_path_retry 12
}

### For MSA2xxxsa arrays - the device is MSA2324sa

device {
vendor "HP"
product "MSA2324sa"
path_grouping_policy group_by_prio
getuid_callout "/lib/udev/scsi_id -g -u -s /block/%n"
prio_callout "/sbin/mpath_prio_alua /dev/%n"
rr_min_io 120
path_checker tur
path_selector "round-robin 0"
rr_weight uniform
failback immediate
hardware_handler "0"
no_path_retry 18
}

blacklist {
wwid 3600508b1001039565952315156500200
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z][[0-9]*]"
devnode "^cciss!c[0-9]d[0-9]*"
}

On the server, the volumes are mapped in /dev/mapper/lvtest1 .. 2 .. 3

so i mount it as /test and run a dd command

dd if=/dev/zero bs=64k count=2500000 of=/test/dd && sync

and the rate is between 200 and 210 M bytes/seconds

is this speed good or bad ?

thank you very much

topic Expected speeds for MSA on Linux in Operating System - Linux

Expected speeds for MSA on Linux