Hello, I am running into a problem where I am getting NFS not responding errors from our f740 (512M ram, 32M nvram). After the error pops up it is immediatly available again, but performance is getting really bad on our filer. My question is does the amout of disk space used effect filer performance substantially? Yesterday we got to 96% full (2x18G shelves). I trimmed it down as much as possible, but am still seeing horrible performance. I have ordered a new 36G shelf, but that may be a few weeks away and I would like to find a stop gap solution.
Could my performance problems be related to space, or are they probably just sheer volume of ops problems.
TIA, --Brian
On Wed, Mar 29, 2000 at 08:46:14AM -0600, Brian Hostetter wrote:
Could my performance problems be related to space, or are they probably just sheer volume of ops problems.
What are the numbers for the # of ops per second?
From the filer's console type in a df command and see how full your file
system is. While WAFL doesn't tend to fragment as much as other file systems it will run into problems finding contiguous disk blocks when the disks get near full (as you correctly thought). The best solution for such a problem is to add more capacity. With other file systems you could get a small amount of temporary relief by defragging the disk (when you think about it though you really defrag the filesystem). Whenever your disks get above 75% full you should be considering whether you need more capacity or whether you need to delete some data. This is true in all filesystem environments. Once the decision is made to increase capacity, it's best to add several disks not just one so that your RAID controller (HW or SW) has more than one disk to start striping new data across. Hope this helps.
Paulb
-----Original Message----- From: owner-dl-toasters@netapp.com [mailto:owner-dl-toasters@netapp.com]On Behalf Of Mike Horwath Sent: Wednesday, March 29, 2000 10:32 AM To: Brian Hostetter Cc: toasters@mathworks.com Subject: Re: Server capacity and performance
On Wed, Mar 29, 2000 at 08:46:14AM -0600, Brian Hostetter wrote:
Could my performance problems be related to space, or are they probably just sheer volume of ops problems.
What are the numbers for the # of ops per second?
-- Mike Horwath Admin & Manager @ VISI.com WORK: drechsau@visi.com IRC: Drechsau http://www.visi.com/ HOME: drechsau@geeks.org The only Minnesota ISP with public statistics: http://noc.visi.com/ Garbage In -- Gospel Out. - berkeley fortune(6)
Make sure you have eliminated any Ethernet auto-sensing issues. (Always force the mode you want on both ends)
On Wed, 29 Mar 2000, Brian Hostetter wrote:
Hello, I am running into a problem where I am getting NFS not responding errors from our f740 (512M ram, 32M nvram). After the error pops up it is immediatly available again, but performance is getting really bad on our filer. My question is does the amout of disk space used effect filer performance substantially? Yesterday we got to 96% full (2x18G shelves). I trimmed it down as much as possible, but am still seeing horrible performance. I have ordered a new 36G shelf, but that may be a few weeks away and I would like to find a stop gap solution.
Could my performance problems be related to space, or are they probably just sheer volume of ops problems.
TIA, --Brian
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Brian Hostetter -
Mike Horwath -
Paul W. Brosseau -
Tom McDonald