Re: Very poor NFS I/O

[Hauke Fath <hf%spg.tu-darmstadt.de@localhost>]

On 2/27/26 14:27, BERTRAND Joël wrote:
> - /, /usr, /usr/src, /var and /srv on raid0 (Raid-1 volume) ;
> - /home on raid1 (Raid5 volume) ;
> - some others tmp filesystems on a ccd0 device exported through iSCSI.
>
> 	All filesystems are FFSv2+EA.
>
> 	CPU is an i7-4770, main memory 16 GB. This server exports /srv and
> /home through NFS (V3/TCP, 128 threads, async) and disk I/O from NFS
> clients are very slow. Server load can raise until 110 or 120 during
> huge NFS access.

How many clients?

Are the server disks spinning rust, or solid state?

I have been running an nfs server for networked /home for more than 20 
years, and have been avoiding raid5 (in favour of mirrored disks) for 
almost as long.

You want as many transactions/sec as you can get.

Cheerio,
Hauke

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