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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