On Mon, Apr 19, 2010 at 01:12:24PM -0500, Eugene Vilensky wrote:
On Mon, Apr 19, 2010 at 10:05 AM, Hakan VELIOGLU
<[email protected]> wrote:
> Hi all,
>
> I got an performance trouble with my iSCSI initiator over bonding
interface.
> Whenever I use bonding, my iscsi performance decreases.
>
> Here is my environment:
> Sun X4150 server with Red Hat 5.5
> EMC CX4-480 iscsi target
> My servers two onboard gigabit ethernet ports are connected to
two different
> Cisco Switches
Hi,
Is there a particular reason you are using bonding? is it a CX4
requirement? I have always, without fail achieved higher performance
in my (Equallogic) environment using device-mapper-multipath. There
are a lot of settings to play with re: tunings, and Dell (for example)
is silent on most, but I've been able to achieve both line-rate or
iops saturation with dm-multipath...
Feel free to share your dm-multipath configs for Eql.
I'm sure people here find them useful :)
-- Pasi
I changed my switch ports from acces to trunk. Then I created bond0.20
interface and bonding has the same speed as single network card no
decrase and also no increase (with bonding mode 5 or 1).
I also tried to change my MTU size from 1500 to 9000 and it didn't
affect the iscsi speed!
May be my problem is about networking topology or something which I am
not very good at.
And here is my multipath config for list :)
[r...@xentest mnt]# cat /etc/multipath.conf
defaults {
user_friendly_names yes
}
blacklist {
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^cciss!c[0-9]d[0-9]*"
devnode "^xvd[a-z]"
wwid "SSun_STK_RAID5INT*"
}
devices {
# Device attributed for EMC CLARiiON
device {
vendor "DGC"
product "*"
prio_callout "/sbin/mpath_prio_emc /dev/%n"
hardware_handler "1 alua"
features "1 queue_if_no_path"
failback immediate
}
}
[r...@xentest mnt]#
Hakan VELIOGLU
RHCE : 805008587832707
Istanbul Technical University
Office of Information Technologies
System Support Team
ITU Linux Academy
Trainer & Course Manager
http://ila.itu.edu.tr
Phone : +90 212 285 39 30
Fax : +90 212 285 69 36
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