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https://issues.apache.org/jira/browse/HBASE-18388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16089247#comment-16089247
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Yu Li commented on HBASE-18388:
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Nice catch and good suggestions. Mind uploading a patch? [~larsgeorge]
[~misty] FYI sir.
> Fix description on region page, explaining what a region name is made of
> ------------------------------------------------------------------------
>
> Key: HBASE-18388
> URL: https://issues.apache.org/jira/browse/HBASE-18388
> Project: HBase
> Issue Type: Improvement
> Components: master, regionserver, UI
> Affects Versions: 1.3.1, 2.0.0-alpha-1
> Reporter: Lars George
> Priority: Minor
> Labels: beginner
>
> In the {{RegionListTmpl.jamon}} we have this:
> {code}
> <p>Region names are made of the containing table's name, a comma,
> the start key, a comma, and a randomly generated region id. To
> illustrate,
> the region named
> <em>domains,apache.org,5464829424211263407</em> is party to the table
> <em>domains</em>, has an id of <em>5464829424211263407</em> and the first
> key
> in the region is <em>apache.org</em>. The <em>hbase:meta</em> 'table'
> is an internal
> system table (or a 'catalog' table in db-speak).
> The hbase:meta table keeps a list of all regions in the system. The empty
> key is used to denote
> table start and table end. A region with an empty start key is the first
> region in a table.
> If a region has both an empty start key and an empty end key, it's the
> only region in the
> table. See <a href="http://hbase.org";>HBase Home</a> for further
> explication.<p>
> {code}
> This is wrong and worded oddly. What needs to be fixed facts wise is:
> - Region names contain (separated by commas) the full table name (including
> the namespace), the start key, the time the region was created, and finally a
> dot with an MD5 hash of everything before the dot. For example:
> {{test,,1499410125885.1544f69aeaf787755caa11d3567a9621.}}
> - The trailing dot is to distinguish legacy region names (like those used by
> the {{hbase:meta}} table)
> - The MD5 hash is used as the directory name within the HBase storage
> directories
> - The names for the meta table use a Jenkins hash instead, also leaving out
> the trailing dot, for example {{hbase:meta,,1.1588230740}}. The time is
> always set to {{1}}.
> - The start key is printed in safe characters, escaping unprintable characters
> - The link to the HBase home page to explain more is useless and should be
> removed.
> - Also, for region replicas, the replica ID is inserted into the name, like
> so {{replicatable,,1486289678486_0001.3e8b7655299b21b3038ff8d39062467f.}},
> see the {{_0001}} part.
> As for the wording, I would just make this all flow a little better, that "is
> party of" sounds weird to me (IMHO).
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