Database Reference
In-Depth Information
•
int getRegionsCount()
: This returns the total number of regions
in the cluster.
•
int getRequestsCount()
: This returns the current number of requests
across all regions' servers in the cluster.
•
String getHBaseVersion()
: This returns the HBase version
identiication string.
•
byte getVersion()
: This returns the version of the ClusterStatus instance
used during the serialization process of sending an instance over RPC.
•
String getClusterId()
: This returns the unique identiier for the cluster.
This is the UUID generated when HBase starts with an empty storage
directory. It is stored in hbase.id under the root directory.
•
Map<String, RegionState>getRegionsInTransition()
: This returns the
map of all regions currently in transition, for example, it is moved, assigned,
or unassigned.
Refer to the API documentation for HBase at
https://hbase.
apache.org/apidocs/index.html
.
Summary
In this chapter, we have learned about the advanced topics such as counters and
coprocessors in detail. We have also looked into the details of the advanced API
provided by HBase for data deinition and HBase administration.
In the next chapter, we will discuss the various clients available for HBase such
as REST client, Thrift client, Kundera, and so on.
