Horrible NFS read performance between 2.4.18/19?

DISCUSSION David Rees 1 participant 2 messages Aug 22, 2002

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David Rees

author

2002-08-22 03:59 UTC #0 lore raw

Hi,

I've got a number of Linux nfs clients running 2.4.18 with trond's NFS-ALL patch and a server running 2.4.19 also with the NFS-ALL patch.

The machines are all hooked up to the same switch.

The problem is that using any rsize/wsize combination larger that 2048 results in the nfs clients getting horrible read performance. The defaults worked fine with the client/server ran 2.4.18 with the NFS-ALL patch. I have not tried updated the clients to 2.4.19, but that is the next step. Write performance is fine.

Is this expected behavior? Or did something change between the two kernels that would cause this problem?

Thanks,
Dave

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David Rees

author

2002-08-22 04:58 UTC #1 lore raw

Following up to myself...

Quoted 6 lines · David Rees

The problem is that using any rsize/wsize combination larger that 2048 results in the nfs clients getting horrible read performance. The defaults worked fine with the client/server ran 2.4.18 with the NFS-ALL patch. I have not tried updated the clients to 2.4.19, but that is the next step. Write performance is fine.

Upgrading the client to 2.4.19 restored read performance...

-Dave