On Wed, Jun 25, 2008 at 09:02:42AM +0200, Adrian von Bidder wrote: > On Tuesday 24 June 2008 22.29:31 J. Bruce Fields wrote: > > On Tue, Jun 24, 2008 at 12:17:24PM +0200, Adrian von Bidder wrote: > > > > Starting KDE, opening documents, sometimes also closing oo.org and > > > saving documents takes several seconds longer than on local disk. > > > > "close" on nfs is an operation that requires a round-trip to the server > > and waiting for the disk to commit any writes made before the close, so > > if you've got to do a lot of those it can take time. Fooling with the > > journaling on the exported filesystem may help. > > Are there tools to measure latencies on NFS? Given a network dump, desired > output would be histograms of latencies by file operation? (Or maybe I can > catch the information on the client, VFS side instead of NFS? > > At this time, I really need to collect more data on where the problem is > since all I'm doing right now is fooling around based on assumptions... :-( > > OTOH I'd suspect KDE/oo.org startup to be mostly reads of those config > files, so the problem shouldn't be close latencies. Assumptions again. > > > > TODO today: play around with NFSv4 on the shaky assumption that nfsv3 > > > is actually working but net latency is killing my performance. > > > > Delegations *might* help if the problem is really open latency. > > First tries showed > * There are no acl on my files now NFSv4 uses an entirely different type of ACL, for which you need different client-side tools; see http://www.citi.umich.edu/projects/nfsv4/linux/nfs4-acl-tools/ > * user id mapping seems funny: some users map to nobody, others map > correctly. Huh? And whereas v2/v3 require only uid's and gid's to agree, v4 (if you're using auth_sys) requires uid's, gid's, *and* user and group names to agree. --b. > * Performance seems to be ok (timing desktop applications is always > difficult, and so far I'm working against on the production server with > varying load anyway...) > > Haven't investigated these yet... ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ NFS maillist - NFS@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/nfs _______________________________________________ Please note that nfs@xxxxxxxxxxxxxxxxxxxxx is being discontinued. Please subscribe to linux-nfs@xxxxxxxxxxxxxxx instead. http://vger.kernel.org/vger-lists.html#linux-nfs -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
