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eSight V300R010C00 Maintenance Guide 08

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HA System Status Overview

HA System Status Overview

Based on the primary and secondary server faults, the eSight HA system (Veritas hot standby) has different status. This topic describes the status.

For the details about the HA system status, see Table 1.
Table 3-4 HA system status

System Status

Status of Primary and Secondary Sites

Remarks

Normal state

The primary server works properly.

The secondary server works properly.

The AppService application runs on the primary server, the heartbeat connection is normal, the replication is from the primary server to the secondary server, and the secondary server works to protect the primary server.

Fault switching state

The primary server is faulty.

The secondary server works properly.

The AppService application runs on the secondary server. The status details are as follows:
  • Resource fault on the primary server: The heartbeat connection is normal and the replication is from the secondary server to the primary server.
  • Primary server failure: The heartbeat connection is torn down and the replication is interrupted.

Primary-primary state

The primary server works properly.

The secondary server works properly.

The AppService application runs on both the primary and secondary servers. This status is usually caused by a communication failure between the primary and secondary servers.

Recovery state

One server works properly.

The other server is to be troubleshot.

The status details are as follows:
  • If the status is caused by a network disconnection, the AppService application runs on the primary server, the heartbeat connection between the primary and secondary servers is normal, and no data is being replicated after the network fault is rectified.
  • If the status is caused by a primary server failure, the AppService application runs on the secondary server, the heartbeat connection between the primary and secondary servers is normal, and no data is being replicated after the primary server fault is rectified.

Protection failure state

The primary server works properly.

The secondary server is faulty.

The AppService application runs on the primary server, and the secondary server does not work to protect the primary server. The status details are as follows:
  • If the status occurs because the sources on the secondary server are faulty or the resource groups on the primary and secondary servers are frozen, the heartbeat connection is normal and the replication is from the primary server to the secondary server.
  • If the status is caused by a secondary server failure, the heartbeat connection is torn down and the replication is interrupted.
  • If the status occurs because the SRL data exceeds the threshold, the heartbeat connection is normal, the replication is from the primary server to the secondary server, and data is not being replicated.

System failure state

The primary server is faulty.

The secondary server is faulty.

Both the primary and secondary servers are faulty, no AppService application runs, the heartbeat connection is torn down, and the replication is interrupted.

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Updated: 2019-08-03

Document ID: EDOC1100044373

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