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Posted to user@hbase.apache.org by "Yu, Libo " <li...@citi.com> on 2014/02/07 20:00:27 UTC

question about Hmaster web console

Hi folks,

On HMaster web console, if I click a table name, I will see all the regions for this table.
For the "name" column, each item is a region, like the following:
TABLE_NAME,START_KEY,1389963819387.d7c439371542d7219efb61df72671290.

The first field is table name and the second is the start key. My question is what is the third
field?  In this case, I want to know what 1389963819387.d7c439371542d7219efb61df72671290
is. I cannot get an answer from any Hbase documentation. Thanks.

Regards,

Libo

Re: question about Hmaster web console

Posted by Shahab Yunus <sh...@gmail.com>.

Also adding to what Ted mentioned, the following book has more details:
http://books.google.com/books?id=i5IFvlnfqi8C&pg=PA85&lpg=PA85&dq=hbase+region+name+start+code&source=bl&ots=kNxk4jhoFx&sig=gZIzPHzV_XVfsPd8_u6u9uRLjWs&hl=en&sa=X&ei=qjH1UsP0DaPp2QW8koGIAQ&ved=0CFgQ6AEwBQ#v=onepage&q=hbase%20region%20name%20start%20code&f=false

Regards,
Shahab


On Fri, Feb 7, 2014 at 2:17 PM, Ted Yu <yu...@gmail.com> wrote:

> 1389963819387 is regionIdTimeStamp
>
> The rest is encodedName of the region.
>
> See HRegionInfo#encodeRegionName()
>
>
> On Fri, Feb 7, 2014 at 11:00 AM, Yu, Libo <li...@citi.com> wrote:
>
> > Hi folks,
> >
> > On HMaster web console, if I click a table name, I will see all the
> > regions for this table.
> > For the "name" column, each item is a region, like the following:
> > TABLE_NAME,START_KEY,1389963819387.d7c439371542d7219efb61df72671290.
> >
> > The first field is table name and the second is the start key. My
> question
> > is what is the third
> > field?  In this case, I want to know what
> > 1389963819387.d7c439371542d7219efb61df72671290
> > is. I cannot get an answer from any Hbase documentation. Thanks.
> >
> > Regards,
> >
> > Libo
> >
> >
>

Re: question about Hmaster web console

Posted by Ted Yu <yu...@gmail.com>.

1389963819387 is regionIdTimeStamp

The rest is encodedName of the region.

See HRegionInfo#encodeRegionName()


On Fri, Feb 7, 2014 at 11:00 AM, Yu, Libo <li...@citi.com> wrote:

> Hi folks,
>
> On HMaster web console, if I click a table name, I will see all the
> regions for this table.
> For the "name" column, each item is a region, like the following:
> TABLE_NAME,START_KEY,1389963819387.d7c439371542d7219efb61df72671290.
>
> The first field is table name and the second is the start key. My question
> is what is the third
> field?  In this case, I want to know what
> 1389963819387.d7c439371542d7219efb61df72671290
> is. I cannot get an answer from any Hbase documentation. Thanks.
>
> Regards,
>
> Libo
>
>