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Posted to user@hbase.apache.org by Rajeshkumar J <ra...@gmail.com> on 2016/12/28 08:59:35 UTC
Internals of hbase scan
Can anyone point me where I can learn internals of hbase such as scan in
depth.
Re: Internals of hbase scan
Posted by Ted Yu <yu...@gmail.com>.
You can step through using IDE.
Below is sample stack trace from running a unit test:
ClientSimpleScanner(ClientScanner).loadCache() line: 382
ClientSimpleScanner(ClientScanner).nextWithSyncCache() line: 357
ClientSimpleScanner.next() line: 50
ResultScanner$1.hasNext() line: 54
TestMobCompactor.countMobCells(Table) line: 588
TestMobCompactor.testCompactionWithHFileLink() line: 242
Cheers
On Wed, Dec 28, 2016 at 4:44 AM, Rajeshkumar J <ra...@gmail.com>
wrote:
> Thanks for ur reply. Whenever I issue ResultScanner.next() can you point me
> the class where will be the control will switch to?
>
> On Wed, Dec 28, 2016 at 6:04 PM, Ted Yu <yu...@gmail.com> wrote:
>
> > You can start from http://hbase.apache.org/book.html#hregion.scans
> >
> > To get to know internals, you should look at the code - in IDE such as
> > Eclipse.
> > Start from StoreScanner and read the classes which reference it.
> >
> > Cheers
> >
> > On Wed, Dec 28, 2016 at 12:59 AM, Rajeshkumar J <
> > rajeshkumarit8292@gmail.com
> > > wrote:
> >
> > > Can anyone point me where I can learn internals of hbase such as scan
> in
> > > depth.
> > >
> >
>
Re: Internals of hbase scan
Posted by Rajeshkumar J <ra...@gmail.com>.
Thanks for ur reply. Whenever I issue ResultScanner.next() can you point me
the class where will be the control will switch to?
On Wed, Dec 28, 2016 at 6:04 PM, Ted Yu <yu...@gmail.com> wrote:
> You can start from http://hbase.apache.org/book.html#hregion.scans
>
> To get to know internals, you should look at the code - in IDE such as
> Eclipse.
> Start from StoreScanner and read the classes which reference it.
>
> Cheers
>
> On Wed, Dec 28, 2016 at 12:59 AM, Rajeshkumar J <
> rajeshkumarit8292@gmail.com
> > wrote:
>
> > Can anyone point me where I can learn internals of hbase such as scan in
> > depth.
> >
>
Re: Internals of hbase scan
Posted by Ted Yu <yu...@gmail.com>.
You can start from http://hbase.apache.org/book.html#hregion.scans
To get to know internals, you should look at the code - in IDE such as
Eclipse.
Start from StoreScanner and read the classes which reference it.
Cheers
On Wed, Dec 28, 2016 at 12:59 AM, Rajeshkumar J <rajeshkumarit8292@gmail.com
> wrote:
> Can anyone point me where I can learn internals of hbase such as scan in
> depth.
>
RE: Internals of hbase scan
Posted by andrew <an...@aliyun.com>.
Reading the source code
-----Original Message-----
From: Rajeshkumar J [mailto:rajeshkumarit8292@gmail.com]
Sent: 2016年12月28日 17:00
To: user@hbase.apache.org
Subject: Internals of hbase scan
Can anyone point me where I can learn internals of hbase such as scan in depth.