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HBase >> mail # user >> hbase many-to-many design


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Re: hbase many-to-many design
Hi Abhishek,

   Got it. Thank you very much.
Thanks & Best Regards
Mike
2012/8/24 Pamecha, Abhishek <[EMAIL PROTECTED]>

> Hi Jong
>
> You can add a new column unannounced. This means your current 'put' does
> not have to recall which other columns are already present in  the row or
> for that matter, in the table. You just issue a put command as if it was
> your first one, and the column will be added.
>
> Unlike rdbms, There are no update or alter table commands You need to
> execute to add a new column.
>
> If the column you are adding already existed,then a new version of value
> you put, is stored.
>
> Thanks
> Abhishek
>
>
> i Sent from my iPad with iMstakes
>
> On Aug 23, 2012, at 21:34, "jing wang" <[EMAIL PROTECTED]> wrote:
>
> > Hi Sonal,
> >
> >   Thanks for your reply.
> >   How to add a new column to the existing columnFamily?The method I want
> > to try is using 3 steps, first get the record, construct a new put, using
> > the reocrd's( getted before) columnFamily2, then delete the old record in
> > Hbase, finally put the new constructed 'put' into Hbase.I really don't
> > think this is a good way.
> >   if another 'put', including a new column is put to Hbase, this is a
> > 'update' action or another version?
> >   Would you please give me some reference for adding a column to a row?
> >
> > Thanks & Best Regards
> > Mike
> >
> >
> > 2012/8/24 Sonal Goyal <[EMAIL PROTECTED]>
> >
> >> If you are you adding a new column to the team column family, I dont
> think
> >> multi version comes into picture. Multi Versioning is saving copies of
> >> values of a particular cell, but you are creating a new cell within the
> >> same row.
> >>
> >>
> >> Best Regards,
> >> Sonal
> >> Crux: Reporting for HBase <https://github.com/sonalgoyal/crux>
> >> Nube Technologies <http://www.nubetech.co>
> >>
> >> <http://in.linkedin.com/in/sonalgoyal>
> >>
> >>
> >>
> >>
> >>
> >> On Fri, Aug 24, 2012 at 8:07 AM, jing wang <[EMAIL PROTECTED]
> >>> wrote:
> >>
> >>> Hi 'user',
> >>>
> >>>     This is a many-to-many question, I also infer the hbase design FAQ,
> >>> http://wiki.apache.org/hadoop/Hbase/FAQ_Design.
> >>>     What I want to do is desinging a 'user' table, incluing 'user'
> basic
> >>> infomations(columnFamily1), and team-name 'user' joined
> >> in(columnFamily2),
> >>>     When a user join in a new Team, I want to update the 'user' table
> to
> >>> add a column to 'columnFamily2'. So when getting the user , I get all
> the
> >>> team-names the user join in.
> >>>     Yet I don't want to put duplicate records, known as multi-versions,
> >>> each user has only one record.
> >>>     What should I do?
> >>>
> >>>    Any advice will be appreciated!
> >>>
> >>>
> >>> Thanks & Best Regards
> >>> Mike
> >>>
> >>
>
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB