eG Monitoring
 

Measures reported by HCPReplicaTest

Replication is the process of keeping two or more Hitachi Content Platform systems in sync with each other. The replication service on each system automatically copies selected Hitachi Content Platform tenants and namespaces and default-namespace directories to one or more of the other systems to form replication topology. Both configuration information and namespace content are copied.

Replication enables Hitachi Content Platform to support cloud storage model, where any type of client request can be serviced equally by any system in the topology. If the systems are in geographically disperse locations, each system may be able to provide faster data access for some applications than the other systems can, depending on where the applications are running.

If a system in replication topology fails, other systems in the topology can both provide continued namespace availability and serve as sources for disaster recovery. This test monitors this replication process and reports bottlenecks �if any). The test tracks the status of the link between any two Hitachi Content Platform systems, and reports if the link is suspended. Replication latencies can be proactively detected by continuously monitoring the rate of data transfer and replication operations reported by this test. Also, by periodically reporting the count of objects that are yet to be replicated and their size, the test reveals whether/not objects are getting replicated at a steady pace.

Outputs of the test: One set of results for the target Hitachi Content Platform.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
replicateStatus Indicates the current replication status of the Hitachi Content Platform system.  

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure Value Numeric Value
Replicating 0
Not replicating 1

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current replication status of the Hitachi Content Platform system.
linkSuspendStatus Indicates whether/not the link between two Hitachi Content Platform systems is suspended.  

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure Value Numeric Value
Yes 1
No 2

Note:

By default, this measure reports the Measure Values listed in the table above to indicate whether/not the link between two Hitachi Content Platform systems is suspended.
pendingObjects Indicates the number of objects yet to be replicated. Number

A low value is desired for these measures.
pendingData Indicates the size of objects pending replication. MB

A low value is desired for these measures.
dataTransferRate Indicates the rate at which data was transferred during replication. MB/sec

A low value is desired for these measures.
operationsPS Indicates the rate of replication operations. Operations/sec

A low value is desired for these measures.<
errorsPS Indicates the rate of replication errors. Errors/sec

A low value is desired for these measures.