Andrew Deason ha scritto:
> On Thu, 17 Jun 2010 15:06:11 +0200
> Claudio Prono <[email protected]> wrote:
>
>
>> I have some problems of speed with AFS. I have a Intel Xeon 3.2 Ghz
>> with 1 Gb of ram, Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320
>> SCSI (rev 07) and external array MSA500.
>>
>
> Platform and OpenAFS version of server? Of the client? What's the
> connection between the server and client?
>
>
OpenAFS 1.4.8 on OpenSuSE 11.0 for server
Client VISTA/Seven with OpenAFS 1.5.71 for clients
> What parameters have you given to afsd and the fileserver? What cache
> size on the client?
>
>
afsd -stat 300 -dcache 100 -daemons 2 -volumes 50 -memcache -dynroot -afsdb
On Client the cache size is 98304 Kb, Chunk size is 256 Kb, Status Cache
is 10000 Entries
>> My average speed is 8 Mb/sec on write and something similar on read.
>> Is a little slow with this performances. My question is, what i can
>> try to make it more fast ? Any custom optimization, or something like
>> this to solve my problem?
>>
>
> I recall a while ago someone reporting a large performance increase by
> increasing -rxpck (on the client I think, but you could try the client
> and server, too). Try setting it to different values around the range
> 4000-10000 or higher, and see what happens. I think some of the recent
> RX changes improves this so you don't need such tweaking, but others may
> correct me.
>
> And, depending on the client version, the default chunksize may not be
> sane; try -chunksize 20. But not-old versions should get it right.
>
> If you provide the output of 'rxdebug <client> 7001 -rxstats' while
> you're reading or writing at a sustained 8Mbps-ish, it may indicate what
> is limiting you.
>
>
How i can increase the -rxpck on the Client or the server? is not clear
to me...
Sorry i don't understand how to provide the output of rxdebug...
Cordially,
Claudio Prono.
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