[PVFS-users] Poor performance

[Rob Ross]

Or, if NFS is doing a better job for what you need to do, just use it.

Rob

Jeffrey B. Layton wrote:
> Nathan Poznick wrote:
> 
>> Thus spake Jon Combe:
>>  
>>
>>> I've tried the count again this morning (when it would presumably have
>>> expired from the cache). It still runs in 4 seconds.
>>>   
>>
>>
>> Only time does not expire things from the cache, only dirtying of the
>> pages by modification or being pushed out by other cached pages.
>> Running in 4 seconds would equate to 369.4066 megabytes per second,
>> which is clearly running from memory.
>>  
>>
>   Nathan is correct. 4 seconds is not realistic for
> disk access times on a remote system. What are the
> NFS export options on the server? What are the
> mount options on the client?
>   I would recommend going to the NFS website
> (nfs.sourceforge.net) and reading some of the
> documentation there (in particular look at the
> sync option). You can also get on the NFS mailing
> list and ask questions there (although please read
> the documentation first).
>   Then you can twiddle the NFS export and client
> mount options to get a better comparison to PVFS.
> 
> Jeff
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