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.

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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、よろしくお願いいたします。

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**************************************************

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

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