Peter Staubach <[EMAIL PROTECTED]> writes:

> Fletcher Mattox wrote:
>>> Fletcher Mattox wrote:
>>> ...
>>>     
>>>> Unprivileged ports and/or UDP are not viable options for us, so I am
>>>> forced to increase the timeout from 5 minutes to 24 hours, which in
>>>> practice means they are always mounted.  We have about 400 automounted
>>>> filesystems, so the only long term solution for us is to try to coalesce
>>>> them to less than 100.  Very painful.
>>>>       
>>> You have 400 automounted file systems, all of which need to be mounted at
>>> the same time?  
>>>     
>>
>> Not all of them, but certainly more than 100 of them, which seems to
>> be the limit we are talking about. 
>>
>>   
>
> Hmm.  Perhaps Chuck Lever's work to reduce the number of required TCP
> connections would help in this sort of deployment.
>
>>> If so, I might suggest that static mounts might better serve
>>> your needs.  
>>>     
>>
>> Really?  I think this is the first time I have ever heard someone
>> advocate static mounts as a solution to a large number of filesystems
>> (especially ones that tend to appear and disappear frequently).
>> But you are right, and this is effectively the solution we arrived at
>> by increasing the timeout.
>>
>>   
>
> Well, if the file systems tend to get mounted and then stay mounted,
> then automounting does little good and can be harmful.

Yes, but at least you get the advantage of central management of your
mount points.

> Automounting also does not tend to work well with large numbers of
> file systems and not always for the scalability reasons which are
> being seen here.

And yet people deploy things this way, and it works.

-jeff

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