Re: NFS Slow writes
On Thu, 15 Jun 2006, Bob Bostwick (Lists) wrote: I've narrowed the problem down. I'm running an FTP server (vsftpd) who's users home dir's are on an nfs share. If I run vstpd without mounting the nfs share (and create a user with a valid home dir) I get 21MB/s uploads. If I copy a file from the OBSD box to a dir on the NFS mount, I get 8MB/s. However if I ftp to the nfs share I get 700KB/s uploads. Downloads are fast either way, it's just the writes that seem really slow. Vsftpd is starting through inetd (but I tried standalone and it made no difference.) Is there some sort of incompatibility in doing it this way? Any thoughts would be greatly appreciated First: you do not tell which version of OpenBSD you are using. Recent version DO have better NFS write performance. Look at the release notes of 3.8. Since local copies are much faster than the ftp'ed data, I would suspect that vsftd is doing writes in such a way that it really stresses nfs. You could try using another ftp server and see if the performance gets better. If that's the case, you know for sure where to look further. -Otto
Re: NFS Slow writes
On 6/15/06, Bob Bostwick (Lists) [EMAIL PROTECTED] wrote: I'm trying to setup an NFS share, and am getting horrible write performance. Reads are fast as can be expected. I've searched the archives and found several threads on the subject, but no resolutions. I've tried all possible fstab options (that I know of) but none really help with write. I'm currently using ip.addr:/nfs /test/dir nfs rw,nodev,nosuid,tcp,intr,-r=32768,-w=32768 0 0 I've found (after various tests) with with an OpenBSD (3.8) server and Linux client, that I get the best performance with: rw,noauto,soft,tcp,rsize=2048,wsize=2048 This gives out 8MB/s for both read and write with my hardware. YMMV, but one thing I did notice is that large rsize/wsize didn't necessarily translate to better performance. -- ach
NFS Slow writes
I'm trying to setup an NFS share, and am getting horrible write performance. Reads are fast as can be expected. I've searched the archives and found several threads on the subject, but no resolutions. I've tried all possible fstab options (that I know of) but none really help with write. I'm currently using ip.addr:/nfs /test/dir nfs rw,nodev,nosuid,tcp,intr,-r=32768,-w=32768 0 0 From (Subject: Re: nfs write speed performance... still)A Nov. 2004 thread ...it seems that the problem is known but no fixes are known or planned for now since there're other priorities... Does anyone still know if this is the case, or have I missed an important thread? Thanks.
Re: NFS Slow writes
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bob Bostwick (Lists) Sent: Thursday, June 15, 2006 6:05 PM To: misc@openbsd.org Subject: NFS Slow writes I'm trying to setup an NFS share, and am getting horrible write performance. Reads are fast as can be expected. I've searched the archives and found several threads on the subject, but no resolutions. I've tried all possible fstab options (that I know of) but none really help with write. I'm currently using ip.addr:/nfs /test/dir nfs rw,nodev,nosuid,tcp,intr,-r=32768,-w=32768 0 0 From (Subject: Re: nfs write speed performance... still)A Nov. 2004 thread ...it seems that the problem is known but no fixes are known or planned for now since there're other priorities... Does anyone still know if this is the case, or have I missed an important thread? Thanks. Newer versions of nfs are set to 'sync' by default. Change to 'async' and check performance. -C
NFS Slow writes
I've narrowed the problem down. I'm running an FTP server (vsftpd) who's users home dir's are on an nfs share. If I run vstpd without mounting the nfs share (and create a user with a valid home dir) I get 21MB/s uploads. If I copy a file from the OBSD box to a dir on the NFS mount, I get 8MB/s. However if I ftp to the nfs share I get 700KB/s uploads. Downloads are fast either way, it's just the writes that seem really slow. Vsftpd is starting through inetd (but I tried standalone and it made no difference.) Is there some sort of incompatibility in doing it this way? Any thoughts would be greatly appreciated
