I think man nfs it's can help you Try to look your nfs client options
2012/1/15 Dennis Jacobfeuerborn <denni...@conversis.de> > Hi, > I'm trying to build a HA nfs system based on drbd and apart from the nfs > export everything is working fine. The problem is that when I force a > failover things seem to work fine yet when I fail back to the original > system the clients freeze for a very long time. > > /mnt/tmp is the mountpoint on the client and I'm using the following to > test access: > for i in `seq 1 2000`; do echo $i; ls /mnt/tmp; sleep 1; done > > on a failover the output look like this: > > ... > 47 > testfile testfile2 > 48 > testfile testfile2 > 49 > testfile testfile2 > 50 > testfile testfile2 > 51 > testfile testfile2 > 52 > ls: cannot open directory /mnt/tmp: Permission denied > 53 > ls: cannot open directory /mnt/tmp: Permission denied > 54 > <<< freeze of several minutes >>> > testfile testfile2 > 55 > testfile testfile2 > 56 > testfile testfile2 > ... > > The first question I have is how can I prevent the "Permission denied" > errors? If these occur on e.g. a mountpoint for MySQL for example this will > no doubt lead to problems with the database and that means the storage > isn't really redundant. > > The second question is how do I reduce the failover time? I tried adding > timeo=30 to the client mount options but that doesn't seem to help. > > This is what my cib looks like: > > node storage1.dev > node storage2.dev > primitive p_drbd_nfs ocf:linbit:drbd \ > params drbd_resource="nfs" \ > op monitor interval="15" role="Master" \ > op monitor interval="30" role="Slave" > primitive p_exportfs_data ocf:heartbeat:exportfs \ > params fsid="1" directory="/mnt/data/export" > options="rw,no_root_squash" clientspec="*" \ > op monitor interval="30s" > primitive p_fs_data ocf:heartbeat:Filesystem \ > params device="/dev/drbd/by-res/nfs" directory="/mnt/data" > fstype="ext3" \ > op monitor interval="10s" > primitive p_ip_nfs ocf:heartbeat:IPaddr2 \ > params ip="192.168.2.190" cidr_netmask="24" \ > op monitor interval="30s" > group g_nfs p_fs_data p_exportfs_data p_ip_nfs > ms ms_drbd_nfs p_drbd_nfs \ > meta master-max="1" master-node-max="1" clone-max="2" > clone-node-max="1" notify="true" > colocation c_nfs_on_drbd inf: g_nfs ms_drbd_nfs:Master > order o_drbd_before_nfs inf: ms_drbd_nfs:promote g_nfs:start > property $id="cib-bootstrap-options" \ > dc-version="1.0.12-unknown" \ > cluster-infrastructure="**openais" \ > expected-quorum-votes="2" \ > stonith-enabled="false" \ > no-quorum-policy="ignore" > rsc_defaults $id="rsc-options" \ > resource-stickiness="200" > > Regards, > Dennis > > ______________________________**_________________ > Pacemaker mailing list: Pacemaker@oss.clusterlabs.org > http://oss.clusterlabs.org/**mailman/listinfo/pacemaker<http://oss.clusterlabs.org/mailman/listinfo/pacemaker> > > Project Home: http://www.clusterlabs.org > Getting started: > http://www.clusterlabs.org/**doc/Cluster_from_Scratch.pdf<http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf> > Bugs: http://bugs.clusterlabs.org > -- esta es mi vida e me la vivo hasta que dios quiera
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