Lei Chen created HBASE-14082:
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Summary: Add replica id to JMX metrics names
Key: HBASE-14082
URL: https://issues.apache.org/jira/browse/HBASE-14082
Project: HBase
Issue Type: Improvement
Components: metrics
Reporter: Lei Chen
Assignee: Lei Chen
Today, via JMX, one cannot distinguish a primary region from a replica. A
possible solution is to add replica id to JMX metrics names. The benefits may
include, for example:
# Knowing the latency of a read request on a replica region means the first
attempt to the primary region has timeout.
# Write requests on replicas are due to the replication process, while the ones
on primary are from clients.
# In case of looking for hot spots of read operations, replicas should be
excluded since TIMELINE reads are sent to all replicas.
To implement, we can change the format of metrics names found at
{code}Hadoop->HBase->RegionServer->Regions->Attributes{code}
from
{code}namespace_<namespace>_table_<tablename>_region_<regionname>_metric_<metricname>{code}
to
{code}namespace_<namespace>_table_<tablename>_region_<regionname>_replicaid_<replicaid>_metric_<metricname>{code}
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