Ceph » CephFS

[Ganesha Version]
Ganesha V2.4
630a35bef41aabf76f99532448d6154316a525e0

[Ceph Version]
ceph version 10.2.7 (50e863e0f4bc8f4b9e31156de690d765af245185)

1.upgrade from 0.94.5 to 10.2.7
   2.fresh 10.2.7

[How to Use CephFS]
1.Client using ceph-fuse to mount the cephfs service,it looks like this: ceph-fuse m <xxx>:6789 <yyy>
2. Re-export CephFS mount point as Ganesha-NFS4 share point.
---------------------------------
EXPORT { # Export Id (mandatory, each EXPORT must have a unique Export_Id)
Export_Id = 77;

1. Exported path (mandatory)
   #Path = /nonexistant;
   Path = /opt/ganesha_nfs;

1. Pseudo Path (required for NFS v4)
   #Pseudo = /nonexistant;
   Pseudo = /opt/ganesha_nfs;

1. Required for access (default is None)
2. Could use CLIENT blocks instead
   Access_Type = RW;

Squash = No_Root_Squash;

1. Exporting FSAL
   FSAL {
   Name = VFS;
   }
   }
   -----------------------------------
   3. Last use NFS4 share service.it looks like this: mount -t nfs4 <xxx>:<yyy> <zzz>

[Issue]
Now I meet a problem: when mds service do migrate action,client will meet IO issue like :"Stale file handle", IO interrupt .

[Debug]
I found there may some issue when mds service migrate under HA.

[Solution]
When IO application meet the above issue, then i will do the following steps:
0. Restart the Ganesha-NFS server service.
1. Stop the IO application
2. Enter the directory again
3. Then, it will work OK as we expected.