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List:       lustre-announce
Subject:    [Lustre-discuss] problem on failover
From:       "Tad Lake" <tad_lake () hotmail ! com>
Date:       2004-10-09 2:53:00
Message-ID: BAY8-F154OPXok84FTA0000e4d6 () hotmail ! com
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Hi,I am trying to use failover of MDS.
My lustre version is 1.2.3. This is what i do for this target. I have five 
nodes:node0,node1,node2,node3,node4, in which node1 and node4 are MDSs, 
node2 is OST and node3 is client. node1 and node4 mount a NFS directory as 
share storage from node0 to form a active/passive failover.

First, i creat a config file using lmc:
 lmc -o test.xml --add node --node node1 --nide node1 --nettype tcp
 lmc -m test.xml --add net --node node2 --nid node2 --nettype tcp
 lmc -m test.xml --add net --node node3 --nid node3 --nettype tcp
 lmc -m test.xml --add net --node node4 --nid node4 --nettype tcp
 lmc -m test.xml --add mds --node node1 --mds mds1 --failover --fstype ext3 
--dev /tmp/mds1 --size 50000
 lmc -m test.xml --add mds --node node4 --mds mds1 --failover --fstype ext3 
--dev /tmp/mds1 --size 50000
 lmc -m test.xml --add lov --lov lov1 --mds mds1 --stripe_sz 65536 
--stripe_cnt 0 --stripe_pattern 0
 lmc -m test.xml --add ost --node node2 --lov lov1 --ost ost1 --fstype ext3 
--dev /tmp/ost1 --size 100000
 lmc -m test.xml --add mtpt --node node3 --path /mnt/lustre --mds mds1 
--lov lov1

Then, i config every node:

lconf --reformat --node node2 test.xml
lconf --reformat --node node4 test.xml
lconf --node node3 test.xml

Next, i close node4 using poweroff.
In node1, i start mds:

lconf --node node1 --select mds1=node1 test.xml

And in node3 i try to recover mds connection:

lconf --recover --select mds1=node1 --tgt_uuid mds1_UUID --conn_UUID 
NID_node4_UUID --client_UUID node3_UUID test.xml

the result is to display:
  Reconnecting mds1_UUID  to  NID_node1_UUID
! /usr/sbin/lctl (255):

Unfortunately, mds is not recovered.

Is there anything i wrong?

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