I can suggest you to check:
1. Network cards and switches/routers between the Linuxes and the filers - check for 100mbit full duplex settings - check in the filer and the linux for nfsstat and netstat errors. 2. I don't have experience with NFS on linux, but I know that there were a lot of nfs changes in the last kernels, so even if it worked OK before, maybe you should just consider to upgrade the linuxes - it is never bad in linux anyway... :) You'll probably get faster NFS that way, since nfs was moved to kernel level I think in 2.3 or something...
Eyal.
--- Henrique Pantarotto henrique@corp.terra.com.br wrote:
Hello toaster friends!
This week I experienced a very strange NFS performance in our POP3 servers. We've 4 POP3 Linux clients mouting 2 netapp boxes, like this:
/var/spool/mail1 - F760 (cluster) /var/spool/mail2 - F760 (cluster) /var/spool/pop - F720
Our Linux clients are Pentium III 650Mhz Dual with 1GB RAM running a Red Hat-like distribution with Kernel 2.2.14-19smp.
This solution has worked very fine until this week, when we started experiencing high Load Average in our Linux boxes and accumulation of pop processes.
Copies from /var/spool/mail to /var/spool/pop are verrrrrrrrry slowwwwwwwwww... so pop processes get status of "D" (Disk Waiting right?, and caos takes place.
I don't know what it is. We're crazy here...
Anyone has ever had hard times like this before with Linux?
Thanks a lot for any help!!!!!!!
PS: We've Brazilian NetApp guys giving us a hand here.
Regards, _______________________________________________ Henrique Pantarotto SysOp Site S�o Paulo Terra Networks Brasil S/A A Internet mais sua do que nunca Tel: (11) 5505-5728 r.316/238 ICQ: 6934285 IT: henpa henrique@corp.terra.com.br
===== Yours, Eyal Traitel eTraitel@yahoo.com, Home: 972-3-5290415 (Tel Aviv) *** eTraitel - it's the new eBuzzword ! ***
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