[ZODB-Dev] Practical experience - ZEO-Server & limited size of file descriptors

[Jim Fulton]

On Mon, Jul 19, 2010 at 11:26 AM, Andreas Jung <lists at zopyx.com> wrote:
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> Jim Fulton wrote:
>> On Mon, Jul 19, 2010 at 11:11 AM, Andreas Jung <lists at zopyx.com> wrote:
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>>> Jim Fulton wrote:
>>>> On Mon, Jul 19, 2010 at 9:40 AM, Andreas Gabriel
>>>> <gabriel at hrz.uni-marburg.de> wrote:
>>>>> Hello,
>>>>>
>>>>> we are hosting a big ZEO based zope site and encountered a problem with a
>>>>> limited size of file descriptors (FDs) of the ZEO server.
>>>>>
>>>>> Scenario
>>>>>
>>>>>  36 ZEO clients (each 2 threads)
>>>>>  1  ZEO server  (serving 10 storages)
>>>> I advise against serving more than one storage per server.
>>> Why?
>>
>> Because Python programs can't use much more than 1 CPU and multiple
>> storage servers in the same process will be slower than in separate
>> processes, assuming the machine has multiple cores.
>>
>>
>
> Sure but I am not aware of serious performance problems related to this
> reason on large scale installations with heavy read and write operations.

I am.

Jim

-- 
Jim Fulton