Hi all We did some failover/failback tests on 2 nodes（A and B） with architecture 'glusterfs + ctdb(public address) + nfs-ganesha'。 file is replica 2 volume. 1st: During write, unplug the network cable of serving node A ->NFS Client took a few seconds to recover to conitinue writing. After some minutes, plug the network cable of serving node A ->NFS Client also took a few seconds to recover to conitinue writing. 2nd: During write, unplug the network cable of serving node A ->NFS Client took 20 minutes to recover to conitinue writing. It is too slow for clients to accept the recovery time。 Why is it failed to fast recovery and took 20 minutes to recovery successfully. Is there anyone knows the reason? We are looking forward to your reply. Thanks. ------------------------------------------------------------------------------------------------------------- The following is some test logs and configuration. cat /etc/ganesha/ganesha.conf NFS_Core_Param { NSM_Use_Caller_Name = true; Clustered = false; MNT_Port = 20048; NLM_Port = 32803; Rquota_Port = 8750; } EXPORT{ Export_Id=181; Path=/file/gv_nfs; FSAL { name = GLUSTER; hostname=localhost; volume="file"; volpath="gv_nfs"; } Pseudo=/file/gv_nfs; Protocols = 3, 4; Transports = TCP; SecType = sys; CLIENT { Clients = *.*.*.*; Access_type = rw; Squash = root_squash; Anonymous_Uid = 99; Anonymous_Gid = 99; } } NFSv4{ Lease_Lifetime = 15; Grace_Period = 30; } 以上、よろしくお�いいたします。 -------------------------------------------------- ************************************************** Liu Dan PF Dept Nanjing Fujitsu Nanda Software Tech.Co.,Ltd.(FNST) TEL：+86+25-86630566-8512 FUJITSU INTERNAL：79955-8512 EMail: liud.fnst@cn.fujitsu.com<mailto:liud.fnst@cn.fujitsu.com> ************************************************** --------------------------------------------------