Cyrus infrastructure performance less than expected

[David Lang]

On Tue, 29 Apr 2008, Eric Déchaux wrote:

> Pascal Gienger a écrit :
>> Eric Déchaux <Eric.Dechaux at Sun.COM> wrote:
>>
>>> The older infrastructure can stand the 42 000 concurrent sessions, the
>>> new one can't : I was expecting each frontend to be able to handle 5 500
>>> concurrent sessions but they are not. Around 3 000 / 3 500 concurrent
>>> sessions the frontends begin to SWAP and are not more able keep up the
>>> load.
>>
>> Did I undertand correctly: You are virtualizing each component and 
>> your frontends begin to swap in their virtual environment?
>> Is there any reason why you don't assign more RAM to them? Does your 
>> frontend virtual machines run a 64 bit kernel?
> That's it. The frontend begin to swap, not the ESX. We have scaled the 
> ESX RAM to avoid SWAPING on the ESX level.
> In fact we can't assign anymore memory as the X4600 can't handle more 
> than 64 Gb.
>
> Another point is we have doubled total RAM compared to the actual 
> platfrom and I don't understand why it behaves so badly.

were you virtualized before? adding virtualization causes a fairly significant 
overhead.

David Lang

>>
>> We abandoned all Linux for our Cyrus Servers and switched to Solaris 
>> 10 with Zoning and ZFS. We have less concurrent users than you but 
>> more storage (10 T at the moment).
>>
> I would have loved to put Solaris, Zones and Massaging Server here but 
> it was not a possibility. Custorme chose was VMware + Linux + Cyrus.
>
>
> Many thanks.
> --
> Eric
>
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