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the biggest things to think about: |
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- nfs versions (some work better or are more compatible with others) |
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- nfs write/read cache settings |
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- use nfsstat to get an idea of what the nfs traffic is like |
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- is filesystem constantly having locking issues or refreshing file |
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attributes? might need to change mount options. |
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- if not local lan, might have significant problems...especially with mtu |
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- doesn't hurt to check iostat -x -k 5 on sending server too along |
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with nic card stats |
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- it usually isn't that hard to track down where the problem lies |
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- I've had great performance with nfs over local lans, horrible issues |
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with any kind of remote nfs....newer nfs versions are trying to work |
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around the issues. |
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|
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On Fri, Apr 20, 2012 at 1:34 PM, Michael Mol <mikemol@×××××.com> wrote: |
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> On Fri, Apr 20, 2012 at 2:29 PM, Helmut Jarausch |
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> <jarausch@××××××××××××××××.de> wrote: |
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>> Hi, |
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>> |
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>> on one of our students' lab the home directories of the students are mounted |
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>> via NFS. |
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>> Our main application (www.codelite.org) seems to write a lot of small chunks |
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>> to files in the |
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>> students' home directories. |
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>> |
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>> Thus, just finishing Codelite takes 100 seconds while the same version on a |
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>> pure local machine |
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>> takes about 2 seconds for that. |
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>> |
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>> A simple test |
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>> dd bs=80 count=10000 if=/dev/zero of=$HOME/Test |
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>> shows only 80 Kb/sec (speed of a floppy drive). |
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>> The machine was idle and connected to a dedicated, nearly idle server by a |
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>> network |
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>> of 1Gb/sec. |
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>> |
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>> Does anybody have some hints on how to speed up such an NFS3 setup? |
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> |
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> There's all kinds of NFS tuning options. I'm not an expert, so I can't |
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> really make any strong suggestions, but my first stop would probably |
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> be grabbing the ebook version of |
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> http://shop.oreilly.com/product/9781565925106.do and giving that a |
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> good couple hours' deep skim. |
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> |
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> |
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> -- |
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> :wq |
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> |
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|
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|
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|
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-- |
| 53 |
Matthew Marlowe |
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matt@××××××××××××××××××××.com |
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https://www.twitter.com/deploylinux |
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1-805-857-9144 |
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