What's the disk like on the nfs server? If it's all software based RAID, writing is going to be really expensive CPU wise vs. reading. Though even with that said, I can't see where a 50 meg file would put a load of 7 on a box. Tim. -----Original Message----- From: Dwight A. Ernest [mailto:dwight@significant.com] Sent: Thursday, September 09, 2004 12:24 PM To: Chuck Haines; Worcester Linux Users Group Subject: Re: [Wlug] NFS Trouble With what options did you mount the volume on the client? Chuck Haines wrote:
I have an interesting problem that is occuring. I have a /home directory on a file server and I have several login servers that mount this /home directory via NFS. Now this /home directory has a ton of files and directorys (about 2000 user accounts). I noticed that when I perform a copy of a large file ( I tested with a 50 MB file) on a login server from something like /tmp to the NFS mounted /home, the load average on the file server jumps up to over 7, and seems to take forever (around 3-4 minutes). If I copy a large file (once again I tested with 50 MB) from the NFS mounted /home to like /tmp on the login server, there is no noticable load average increase and it occurs in approximately 10-15 seconds. So it seems that writes to the NFS mounted /home are taking longer than they should and are spiking the load average. Both the file server and the login servers are dual P3's with 2 gigs of ram. Has anyone ever seen anything like this, or knows of any solutions to this problem?
Thanks, Chuck
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It is all software raid, so I assumed slightly more intensive, however I didn't expect a load of 7 either. The raid array is 7 73.6 GB Ultra320 SCSI 15k RPM drives connected to the machine via Ultra320 SCSI (it's a dell powervault connected to a dell poweredge). Chuck On Thu, 9 Sep 2004 13:54:47 -0400, Keller, Tim <tim.keller@stratus.com> wrote:
What's the disk like on the nfs server?
If it's all software based RAID, writing is going to be really expensive CPU wise vs. reading. Though even with that said, I can't see where a 50 meg file would put a load of 7 on a box.
Tim.
-----Original Message----- From: Dwight A. Ernest [mailto:dwight@significant.com] Sent: Thursday, September 09, 2004 12:24 PM To: Chuck Haines; Worcester Linux Users Group Subject: Re: [Wlug] NFS Trouble
With what options did you mount the volume on the client?
Chuck Haines wrote:
I have an interesting problem that is occuring. I have a /home directory on a file server and I have several login servers that mount this /home directory via NFS. Now this /home directory has a ton of files and directorys (about 2000 user accounts). I noticed that when I perform a copy of a large file ( I tested with a 50 MB file) on a login server from something like /tmp to the NFS mounted /home, the load average on the file server jumps up to over 7, and seems to take forever (around 3-4 minutes). If I copy a large file (once again I tested with 50 MB) from the NFS mounted /home to like /tmp on the login server, there is no noticable load average increase and it occurs in approximately 10-15 seconds. So it seems that writes to the NFS mounted /home are taking longer than they should and are spiking the load average. Both the file server and the login servers are dual P3's with 2 gigs of ram. Has anyone ever seen anything like this, or knows of any solutions to this problem?
Thanks, Chuck
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-- Chuck Haines chaines@gmail.com ------------------------------------------- Tau Kappa Epsilon Fraternity WPI Class of 2005 ------------------------------------------- AIM: CyberGrex YIM: CyberGrex_27 ICQ: 3707881 -------------------------------------------
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