On Fri, Jun 18, 2010 at 4:18 AM, Claudio Prono <[email protected]> wrote: > > > 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
1.4.12 with jumbograms enabled (-jumbo) will perform better. > > 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... add the switch to the fileserver switches in the bos bnode. > Sorry i don't understand how to provide the output of rxdebug... > > Cordially, > > Claudio Prono. > > > > -- > -------------------------------------------------------------------------------- > Claudio Prono OPST > System Developer > Gsm: +39-349-54.33.258 > @PSS Srl Tel: +39-011-32.72.100 > Via San Bernardino, 17 Fax: +39-011-32.46.497 > 10141 Torino - ITALY http://atpss.net/disclaimer > -------------------------------------------------------------------------------- > PGP Key - http://keys.atpss.net/c_prono.asc > > > > -- Derrick _______________________________________________ OpenAFS-info mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-info
