验证集群运行状况（验证存储运行状况）

在升级、还原或降级集群前后，您应该验证节点是否正常运行并有资格加入集群，以及集群是否处于仲裁阶段。

1. Verify that the nodes in the cluster are online and are eligible to participate in the cluster: cluster show
   示例

   cluster1::> cluster show
   Node                  Health  Eligibility
   --------------------- ------- ------------
   node0                 true    true
   node1                 true    true
   

   If any node is unhealthy or ineligible, check EMS logs for errors and take corrective action.
2. Set the privilege level to advanced: set -privilege advanced
3. 输入 y 继续操作。
4. Verify the configuration details for each RDB process.
   • The relational database epoch and database epochs should match for each node.
   • The per-ring quorum master should be the same for all nodes.

     Note that each ring might have a different quorum master.

   To display this RDB process...	输入的命令
   Management application	cluster ring show -unitname mgmt
   Volume location database	cluster ring show -unitname vldb
   Virtual-Interface manager	cluster ring show -unitname vifmgr
   SAN management daemon	cluster ring show -unitname bcomd

   示例
   This example shows the volume location database process:

   cluster1::*> cluster ring show -unitname vldb
   Node      UnitName Epoch    DB Epoch DB Trnxs Master    Online
   --------- -------- -------- -------- -------- --------- ---------
   node0     vldb     154      154      14847    node0     master
   node1     vldb     154      154      14847    node0     secondary
   node2     vldb     154      154      14847    node0     secondary
   node3     vldb     154      154      14847    node0     secondary
   4 entries were displayed.
   

5. If you are operating in a SAN environment, verify that each node is in a SAN quorum: event log show -messagename scsiblade.*
   The most recent scsiblade event message for each node should indicate that the scsi-blade is in quorum.
   示例

   cluster1::*> event log show -messagename scsiblade.*
   Time                Node             Severity      Event
   ------------------- ---------------- ------------- ---------------------------
   MM/DD/YYYY TIME  node0            INFORMATIONAL scsiblade.in.quorum: The scsi-blade ...
   MM/DD/YYYY TIME  node1            INFORMATIONAL scsiblade.in.quorum: The scsi-blade ...
   

6. Return to the admin privilege level: set -privilege admin