[Linux-cluster] slow NFS performance on GFS2

[Rafael Bravo]

El 24/09/2013 11:29, Olivier Desport escribió:
> Hello,
>
> I've installed a two nodes GFS2 cluster on Debian 7. The nodes are 
> connected to the datas by iSCSI and multipathing with a 10 Gb/s link. 
> I can write a 1g file with dd at 500 Mbytes/s. I export with NFS (on a 
> 10 Gb/s network) and I only can reach  220 Mbytes/s. I think that it's 
> a little bit far from 500 Mbytes/s...
>
> Do you how to tune my settings to increase the speed for NFS ?
>
> GFS2 mount :
> /dev/vg-bigfiles/lv-bigfiles /export/bigfiles gfs2 
> _netdev,nodiratime,noatime 0 0
>
> NFS export :
> /export/bigfiles 
> 172.16.0.0/16(fsid=2,rw,async,no_root_squash,no_subtree_check)
>
> mount on NFS clients :
> nfs-server:/export/bigfiles /data/bigfiles nfs4 
> _netdev,rw,user,nodiratime,noatime,intr 0 0
     Use options on NFS clients:     rsize=32768,wsize=32768