Re: Gluster performance / Dell Idrac enterprise conflict

[Alvin Starr <alvin@xxxxxxxxxx>]

I would be really supprised if the problem was related to Idrac.

The Idrac processor is a stand alone cpu with its own nic and runs independent of the main CPU.

That being said it does have visibility into the whole system.

try using dmidecode to compare the systems and take a close look at the raid controllers and what size and form of cache they have.

On 02/26/2018 11:34 AM, Ryan Wilkinson wrote:

I've tested about 12 different Dell servers.  Ony a couple of them have Idrac express and all the others have Idrac Enterprise.  All the boxes with Enterprise perform poorly and the couple that have express perform well.  I use the disks in raid mode on all of them.  I've tried a few non-Dell boxes and they all perform well even though some of them are very old.  I've also tried disabling Idrac, the Idrac nic, virtual storage for Idrac with no sucess..

On Mon, Feb 26, 2018 at 9:28 AM, Serkan Çoban <cobanserkan@xxxxxxxxx> wrote:

I don't think it is related with iDRAC itself but some configuration
is wrong or there is some hw error.
Did you check battery of raid controller? Do you use disks in jbod
mode or raid mode?

On Mon, Feb 26, 2018 at 6:12 PM, Ryan Wilkinson <ryanwilk@xxxxxxxxx> wrote:
> Thanks for the suggestion.  I tried both of these with no difference in
> performance.I have tried several other Dell hosts with Idrac Enterprise and
> getting the same results.  I also tried a new Dell T130 with Idrac express
> and was getting over 700 MB/s.  Any other users had this issues with Idrac
> Enterprise??
>
>
> On Thu, Feb 22, 2018 at 12:16 AM, Serkan Çoban <cobanserkan@xxxxxxxxx>
> wrote:
>>
>> "Did you check the BIOS/Power settings? They should be set for high
>> performance.
>> Also you can try to boot "intel_idle.max_cstate=0" kernel command line
>> option to be sure CPUs not entering power saving states.
>>
>> On Thu, Feb 22, 2018 at 9:59 AM, Ryan Wilkinson <ryanwilk@xxxxxxxxx>
>> wrote:
>> >
>> >
>> > I have a 3 host gluster replicated cluster that is providing storage for
>> > our
>> > RHEV environment.  We've been having issues with inconsistent
>> > performance
>> > from the VMs depending on which Hypervisor they are running on.  I've
>> > confirmed throughput to be ~9Gb/s to each of the storage hosts from the
>> > hypervisors.  I'm getting ~300MB/s disk read spead when our test vm is
>> > on
>> > the slow Hypervisors and over 500 on the faster ones.  The performance
>> > doesn't seem to be affected much by the cpu, memory that are in the
>> > hypervisors.  I have tried a couple of really old boxes and got over 500
>> > MB/s.  The common thread seems to be that the poorly perfoming hosts all
>> > have Dell's Idrac 7 Enterprise.  I have one Hypervisor that has Idrac 7
>> > express and it performs well.  We've compared system packages and
>> > versions
>> > til we're blue in the face and have been struggling with this for a
>> > couple
>> > months but that seems to be the only common denominator.  I've tried on
>> > one
>> > of those Idrac 7 hosts to disable the nic, virtual drive, etc, etc. but
>> > no
>> > change in performance.  In addition, I tried 5 new hosts and all are
>> > complying to the Idrac enterprise theory.  Anyone else had this issue?!
>> >
>> >
>> >
>> > _______________________________________________
>> > Gluster-users mailing list
>> > Gluster-users@xxxxxxxxxxx
>> > http://lists.gluster.org/mailman/listinfo/gluster-users
>
>

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-- 
Alvin Starr                   ||   land:  (905)513-7688
Netvel Inc.                   ||   Cell:  (416)806-0133
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