hbase-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Matt K <matvey1...@gmail.com>
Subject Re: custom filter on hbase 0.96
Date Wed, 22 Oct 2014 01:02:10 GMT
Thanks Kevin!

I was under impression, probably mistakingly, that as of 0.96 placing
the filter on hdfs under hbase lib directory is sufficient and RS should
load the filter dynamically from hdfs. Is that not the case?

On Tuesday, October 21, 2014, Kevin <kevin.macksamie@gmail.com> wrote:

> BTW, the error looks like you didn't distribute your custom filter to your
> region servers.
>
> On Tue, Oct 21, 2014 at 1:34 PM, Kevin <kevin.macksamie@gmail.com
> <javascript:;>> wrote:
>
> > Matt,
> >
> > You should create your own proto file and compile that with the Google
> > Protocol Buffer compiler. Take a look at the SingleColumnValueFilter's
> > code:
> >
> https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SingleColumnValueFilter.java#L327
> >
> > You will need to override `public byte[] toByteArray()` and `public
> static
> > Filter parseFrom(byte[] pbBytes)`. The output of toByteArray() should be
> > the byte[] from serializing with the protocol buffer. This will also be
> the
> > input to parseFrom(byte[]), which is called using reflection on the
> > server-side to instantiate your custom filter and use it.
> >
> > On Sun, Oct 19, 2014 at 11:31 AM, Matt K <matvey1414@gmail.com
> <javascript:;>> wrote:
> >
> >> Anyone?
> >>
> >> On Thursday, October 16, 2014, Matt K <matvey1414@gmail.com
> <javascript:;>> wrote:
> >>
> >> > Hi, can anyone help with above? Feels like I'm missing something
> >> obvious.
> >> >
> >> > On Wednesday, October 15, 2014, Nishanth S <nishanth.2884@gmail.com
> <javascript:;>
> >> > <javascript:_e(%7B%7D,'cvml','nishanth.2884@gmail.com <javascript:;>');>>
> wrote:
> >> >
> >> >> Thanks Ted .I will take a look.
> >> >>
> >> >> -Nishanth
> >> >>
> >> >> On Wed, Oct 15, 2014 at 3:43 PM, Ted Yu <yuzhihong@gmail.com
> <javascript:;>> wrote:
> >> >>
> >> >> > Nishanth:
> >> >> > Good question.
> >> >> >
> >> >> > As a general coding guide, writing unit test is always a good
> start.
> >> >> Using
> >> >> > Matt's case as an example, take a look at TestPrefixFilter.
> >> >> >
> >> >> > There're various unit tests for Filters in hbase code.
> >> >> >
> >> >> > Cheers
> >> >> >
> >> >> > On Wed, Oct 15, 2014 at 2:30 PM, Nishanth S <
> nishanth.2884@gmail.com <javascript:;>
> >> >
> >> >> > wrote:
> >> >> >
> >> >> > > Hi Ted ,
> >> >> > >  Since I am also working on similar thing is there a way
we can
> >> first
> >> >> > test
> >> >> > > the filter on client side?.You know what I  mean without
> disrupting
> >> >> > others
> >> >> > > who are using the same cluster for other work?
> >> >> > >
> >> >> > > Thanks,
> >> >> > > Nishanth
> >> >> > >
> >> >> > > On Wed, Oct 15, 2014 at 3:17 PM, Ted Yu <yuzhihong@gmail.com
> <javascript:;>>
> >> wrote:
> >> >> > >
> >> >> > > > bq. Or create a new file, compile it into ...
> >> >> > > >
> >> >> > > > You should go with the above approach.
> >> >> > > >
> >> >> > > > On Wed, Oct 15, 2014 at 2:08 PM, Matt K <matvey1414@gmail.com
> <javascript:;>>
> >> >> wrote:
> >> >> > > >
> >> >> > > > > Hi all,
> >> >> > > > >
> >> >> > > > > I'm trying to get a custom filter to work on HBase
0.96.
> After
> >> >> some
> >> >> > > > > searching, I found that starting from 0.96, the
implementer
> is
> >> >> > required
> >> >> > > > to
> >> >> > > > > implement "toByteArray" and "parseFrom" methods,
using
> Protocol
> >> >> > > Buffers.
> >> >> > > > > But I'm having trouble with the "how".
> >> >> > > > >
> >> >> > > > > The "proto" file for the existing filters is located
here:
> >> >> > > > >
> >> >> > > > >
> >> >> > > >
> >> >> > >
> >> >> >
> >> >>
> >>
> https://github.com/apache/hbase/blob/master/hbase-protocol/src/main/protobuf/Filter.proto
> >> >> > > > >
> >> >> > > > > Am I supposed to modify that file? Or create a
new file,
> >> compile
> >> >> it
> >> >> > > into
> >> >> > > > > Java, and package it up with the filter?
> >> >> > > > >
> >> >> > > > > In the meantime, I've taken a shortcut that's not
working.
> >> Here's
> >> >> my
> >> >> > > > code:
> >> >> > > > > http://pastebin.com/iHFKu9Xz
> >> >> > > > >
> >> >> > > > > I'm using "PrefixFilter", which comes with HBase,
since I'm
> >> also
> >> >> > > > filtering
> >> >> > > > > by "prefix". However, that errors out with the
following:
> >> >> > > > > http://pastebin.com/zBg47p6Z
> >> >> > > > >
> >> >> > > > > Thanks in advance for helping!
> >> >> > > > >
> >> >> > > > > -Matt
> >> >> > > > >
> >> >> > > >
> >> >> > >
> >> >> >
> >> >>
> >> >
> >> >
> >> > --
> >> > www.calcmachine.com - easy online calculator.
> >> >
> >>
> >>
> >> --
> >> www.calcmachine.com - easy online calculator.
> >>
> >
> >
>


-- 
www.calcmachine.com - easy online calculator.

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message