Bulletproof Improved Region Reporting
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Key: HBASE-3463
URL: https://issues.apache.org/jira/browse/HBASE-3463
Project: HBase
Issue Type: Improvement
Environment: HBase Mgmt User Interface
Reporter: Wayne
It would be great if the HBase management user interface provided more
bullet-proof reporting in terms of region counts and status. The regions counts
go up and down and different views show different counts and they don't always
add up. It makes one less than confident of what is going on.
Cluster wide And per table it would be great to get summary counts of all
regions in the various states. It would also be useful to see this state in the
description of the region. There is a compaction count, but what about in
split, memstore flush, read/write lock, disabled, etc. Fundamentally this is
the health monitor of the system and as a dba one really needs to know the 100%
count of regions and where they are all at in terms of availability. Are they
disabled, blocked for writes, blocked for reads, in compaction, etc. etc.
The first step is to define and document exactly what states a region could be
in and what impact that state could have on performance, write blocking, read
blocking, compaction, disabling, etc. etc. This needs to be defined and well
documented. Once these states are defined and well understood (and explain
every problem one could have reading/writing/pausing/disabling) then adding to
the UI view to show a count of all regions within each state (with a
percentage) and also report this state in the detailed list of regions it would
give one an holistic view of exactly what is going on.
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