Synology SA3200D Synology High Availability SHA User Guide for DSM 7.0 - Page 31

High-availability cluster information, SHA Troubleshooting, Cluster connection

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Chapter 4: Navigate the SHA User Interface Status Healthy Processing Updating Warning Critical Description The cluster is healthy. Data is being replicated between the hosts. The autofailover feature is available. The system is processing certain operations, such as data replication, volume repair/expansion, or others. The auto-failover feature is not available. The system or the package is updating. The auto-failover feature is not available. The system has detected errors in the cluster, but the services may still be running. The auto-failover function may be unavailable. Any errors must be addressed as soon as possible. The system has detected one or more critical errors in the cluster, and the hosts are not able to run the usual services. All errors must be addressed as soon as possible. The system may encounter a split-brain error, where it may fail to determine which of the hosts is the active server. In this case, all services will be suspended to avoid further data inconsistencies until the issues are resolved. To troubleshoot abnormal high availability cluster statuses (Warning or Critical), refer to Chapter 2: SHA Troubleshooting in the Synology High Availability (SHA) Troubleshooting Guide. High-availability cluster information This section provides basic information on the Cluster connection with a simulated illustration. A warning/critical icon will be displayed if there is a system error. You can also view the Heartbeat connection status, the transfer speed, and the latency in this section. 29

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Chapter 4: Navigate the SHA User Interface
Status
Description
Healthy
The cluster is healthy. Data is being replicated between the hosts. The auto-
failover feature is available.
Processing
The system is processing certain operations, such as data replication, volume
repair/expansion, or others. The auto-failover feature is not available.
Updating
The system or the package is updating. The auto-failover feature is not
available.
Warning
The system has detected errors in the cluster, but the services may still be
running. The auto-failover function may be unavailable. Any errors must be
addressed as soon as possible.
Critical
The system has detected one or more critical errors in the cluster, and the
hosts are not able to run the usual services. All errors must be addressed
as soon as possible. The system may encounter a
split-brain error
, where
it may fail to determine which of the hosts is the active server. In this case,
all services will be suspended to avoid further data inconsistencies until the
issues are resolved.
To troubleshoot abnormal high availability cluster statuses (Warning or Critical), refer to
Chapter 2: SHA Troubleshooting
in the
Synology High Availability (SHA) Troubleshooting
Guide
.
High-availability cluster information
This section provides basic information on the
Cluster connection
with a simulated
illustration. A warning/critical icon will be displayed if there is a system error. You can also view
the Heartbeat connection status, the transfer speed, and the latency in this section.