Hello,
One of my servers runs a NetBSD-11RC1 system. This server was installed
a long time ago with a NetBSD 4 and some pieces have been replaced. For
historical reason, it has :
- /, /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.
iperf shows that network runs as expected. I suppose bottleneck is
between filesystem and disk I/O. /home for example is built with Toshiba
Enterprise hard drive (SATA).
I don't know how fix this bottleneck. Is ZFS an option in this
situation ? Or another filesystem ? And if ZFS is better than FFS in
this situation, are 16 GB enough ?
Best regards,
JB
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