Expanding the Capacity of the CCM ZooKeeper Cluster

The following describes how to expand a three-node cluster to a seven-node cluster. The original ZooKeeper server list is expanded from ceph1:2181,ceph2:2181,ceph3:2181 to ceph1:2181,ceph2:2181,ceph3:2181,ceph4:2181,ceph5:2181,ceph6:2181,ceph7:2181.

1. Modify zk_server_list in the /opt/gcache/conf/gcache.conf file on the Global Cache server.

   1 2	[communicate] zk_server_list = ceph1:2181,ceph2:2181,ceph3:2181,ceph4:2181,ceph5:2181,ceph6:2181,ceph7:2181

2. Modify zk_server_list under ccm cluster in the /opt/gcache/conf/bcm.xml file on the Global Cache server and client. Then import the latest CCM ZooKeeper configuration based on Verifying Global Cache.

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   <?xml version="1.0"?> <bcm zk_server_list="ceph1:2182,ceph2:2182,ceph3:2182"> <cluster id="1"zk_server_list="ceph1:2181,ceph2:2181,ceph3:2181,ceph4:2181,ceph5:2181,ceph6:2181,ceph7:2181"> <pool id="1"></pool> <pool id="2"></pool> </cluster> </bcm>