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https://issues.apache.org/jira/browse/HBASE-14925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15041969#comment-15041969
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stack commented on HBASE-14925:
-------------------------------
Just some notes... yeah, would be good to have a nice dump of regions by table.
How to format output will be an issue. Need to do escaping if binary data as we
do in the shell currently. Unfortunately while you can do 'm =
get_table('hbase:meta')' and then 'm.scan...', we've not done the work so you
can do 'for result in m.scan....' so you could loop the results in the shell
and format them however you wish.
Here is some ugly hack that gets the wanted cells from hbase:meta and then cuts
up the emission into a form perhaps digestible in shell (have to handle the
empty row that demarks start and stop of a table...)
{code}
echo "scan 'hbase:meta', {ROWPREFIXFILTER => 't2,', COLUMNS => ['info:server',
'info:regioninfo']"} | ./bin/hbase shell|sed -e 's/^.*value=//'|paste -d " " -
-|sed -e "s/^.*NAME => '//" -e "s/', STARTKEY => '/ /" -e "s/', ENDKEY => '/ /"
-e "s/'} / /"
{code}
...where 't2' in above is the tablename, would get you:
{code}
t2,a,1449181637707.cf2b5d8caa5a0a44d7f0b48273abb53e. a b localhost:61767
t2,b,1449181637707.80686f6b985b23885e06416ced5e9e1b. b c localhost:61767
t2,c,1449181637707.4c8237c47d72de053f1b8e50a28dd223. c d localhost:61767
t2,d,1449181637707.a5f1b474563b6d4ee2cabbd75d2ffd1e. d e localhost:61767
t2,e,1449181637707.14f09d26e6d98498473483ee479b0e61. e f localhost:61767
t2,f,1449181637707.a37b71a65c6a6395ffdf4af57d69382a. f localhost:61767
{code}
... but all is quoted and it needs more edit to get clean list.
Doing this in shell, you are getting the toStringBinary... which does escaping
which may or may not be wanted by the issue filer.
The shell is ruby so you could write a few lines to format however.
> Develop HBase shell command/tool to list table's region info through command
> line
> ---------------------------------------------------------------------------------
>
> Key: HBASE-14925
> URL: https://issues.apache.org/jira/browse/HBASE-14925
> Project: HBase
> Issue Type: Improvement
> Components: shell
> Reporter: Romil Choksi
>
> I am going through the hbase shell commands to see if there is anything I can
> use to get all the regions info just for a particular table. I don’t see any
> such command that provides me that information.
> It would be better to have a command that provides region info, start key,
> end key etc taking a table name as the input parameter. This is available
> through HBase UI on clicking on a particular table's link
> A tool/shell command to get a list of regions for a table or all tables in a
> tabular structured output (that is machine readable)
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