> On Fri, 23 Mar 2012 01:02:10 +0200 (EET) > [email protected] wrote: > >> > 109M single file: >> > >> > SSH to AFS ~525KB/s >> > AFS to SSH ~800KB/s > [...] >> I tried turning off encryption, but it didn't make a notable >> difference with either file transfer test > > Okay, well that's obviously better but still much lower than the > theoretical. There are a few more switches you can fiddle with: > > - increase the chunksize by passing -chunksize to afsd (you have to > restart the client to change this). Try '-chunksize 20' for 1M, or > '-chunksize 23' for 8M, or something around there.
I'm propably not doing this correctly, but hopefully we're on to something: 1st trial # afsd -chunksize 20 > afsd: Error calling AFSOP_CACHEINODE: not configured 2nd trial # invoke-rc.d openafs-client stop # afsd -chunksize 20 > afsd: Error -1 in basic initialization How to do this correctly? Asking the basics, sorry br, jukka > > - try memcache instead of disk cache (I assume you're using disk > cache). Do this by passing -memcache to afsd, but this will use RAM > instead of local disk for the caching stuff, so you might need to > lower the cache size in 'cacheinfo'. > > - try 'cache bypass' (with disk cache) which you can turn on with 'fs > bypassthresh'. But keep in mind cache bypass is still a new feature > and may not be entirely stable. > > If it still seems slow no matter what you try, what may be helpful is if > you can provide the output of: > > rxdebug <client> 7001 -rxstat -noconn > rxdebug <server> 7000 -rxstat -noconn > > So we could see the rate of resends and such for Rx. Provide that output > both immediately before and immediately after you try a transfer. > > You can also try a benchmark using 'rxperf' to see how fast rx itself > goes, which could help rule out what the bottleneck is during the > transfer. If you want to try that but are not sure how to use it, let us > know. > > -- > Andrew Deason > [email protected] > > _______________________________________________ > OpenAFS-info mailing list > [email protected] > https://lists.openafs.org/mailman/listinfo/openafs-info > _______________________________________________ OpenAFS-info mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-info
