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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Question about open table
Date Mon, 11 Apr 2016 13:50:45 GMT
bq. I am using hbase 2.x

2.0 has not been released yet.
Probably you meant 1.x ?

On Mon, Apr 11, 2016 at 6:48 AM, Yi Jiang <yi.jiang@ubisoft.com> wrote:

> Thanks
> I am using hbase 2.x, so only once to create the connection in my project.
> According to Ted, the getTable is not expensive, then I am able to get and
> close table in each request.
> Jacky
>
> -----Original Message-----
> From: Yu Li [mailto:carp84@gmail.com]
> Sent: Monday, April 11, 2016 12:05 AM
> To: user@hbase.apache.org
> Subject: Re: Question about open table
>
> If using HBase 1.x, please make sure to reuse the connection since
> creating connection is expensive. More specified, don't call
> {{ConnectionFactory.createConnection}} (the 1.x recommended way) multiple
> times but only once and share it among threads, while
> {{HConnectionManager#getConnection}} (the <=0.98 way) would just be ok. FYI.
>
> Best Regards,
> Yu
>
> On 10 April 2016 at 14:08, Yi Jiang <yi.jiang@ubisoft.com> wrote:
>
> > Hi, Ted
> > Thanks for help. The getConnection is just a simple getter
> > method.public Connection getConnection(){return connection;} I have
> > configured my connection in constructor.
> > Jacky
> >
> > -----Original Message-----
> > From: Ted Yu [mailto:yuzhihong@gmail.com]
> > Sent: Saturday, April 09, 2016 11:03 AM
> > To: user@hbase.apache.org
> > Subject: Re: Question about open table
> >
> > Can you show the body of getConnection() ?
> >
> > getTable() itself is not expensive - assuming the same underlying
> > Connection.
> >
> > Cheers
> >
> > On Sat, Apr 9, 2016 at 7:18 AM, Yi Jiang <yi.jiang@ubisoft.com> wrote:
> >
> > > Hi, Guys
> > > I just have a question, I am trying to save the data into table in
> > > HBase I am using
> > >
> > > Table table =
> > > getConnection().getTable(TableName.valueOf(tableName));
> > > ...
> > > ...
> > > Table.close
> > >
> > > My question is that, is the "getTable" expensive?
> > > Shall I use that get table and close table in each saving?
> > > Or I just get table at the beginning, saving all data and then close
> > > the table after all saving.
> > > Because from the aspect of code design, I will save data into the
> > > different table on the flying. So, if it is expensive, I would like
> > > to rewrite the design.
> > > Thank you
> > > Jacky
> > >
> >
>

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