This may be to general and if it's a repeat of what is know or tried, just ignore..
I don't know what is special about Thecus NAS, but in general, depending on what type of network you have - consider following: Enabling jumbo frames - if NFS network is storage transport network (both switch and host level) Try altering tcp vs udp (if there are many hops within your network and UDP packets get lost - you may have poor performance and inconsistent data) Use larger rsize and wsize - in my case on some hosts with heavy NFS traffic serving large files are set to "32768". Take a look at this link (Database related - but could be used in other setups as well, try altering NFS versions and hard vs soft ) - http://www.dbaexpert.com/blog/2007/10/nfs-mount-options-for-nfs/ There is no easy way to tell - there are tons of variables to consider, i.e. network topology, NFS version, NAS setup (raid, SATA vs SCSI disks, cache, CPU, Mem, NIC), how busy your NAS gets, client mount options, etc... I would try benchmarking many different options to see which one works best for your environment. Best of luck, -ilya -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Tim Evans Sent: Monday, December 20, 2010 11:39 AM To: James Pearson Cc: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list Subject: Re: [rhelv5-list] NFS Mount Options for Thecus N7700 NAS On 12/20/10 10:38, James Pearson wrote: > Tim Evans wrote: >> Seeing very slow throughput for RHEL 5.x NFS client NFS mounting a >> Thecus N7700 NAS with "default" NFS options. >> >> These NAS have embedded Linux OS of some sort. >> http://www.thecus.com/product.php?PROD_ID=14 >> >> dump is trickling along at about 530 KB/s; at this rate, a full dump >> of a 150GB filesystem will take 3+ days: >> >> DUMP: 3.17% done at 531 kB/s, finished in 81:30 >> >> I've had good luck with 'proto=udp,rsize=8192,wsize=8192' on Solaris >> systems mounting other embedded-Linux NAS (i.e., NetGear ReadyNAS), >> but this doesn't seem to make any difference with the Thecus. >> >> Anyone have one of these and can suggest options to use? Thanks. > > What mount options are you using (i.e. from /proc/mounts) ? As I said (see above) pure-D defaults for the NFS mount. Changing to the second set (above) didn't make any difference, although it did help majorly with a Fedora 13 client and the same NAS. -- Tim Evans, TKEvans.com, Inc. | 5 Chestnut Court UNIX System Admin Consulting | Owings Mills, MD 21117 http://www.tkevans.com/ | 443-394-3864 http://www.come-here.com/News/ | [email protected] _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
