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From: Andrey Stepachev <octo47@gmail.com>
Date: Sun, 25 Dec 2011 00:39:46 +0400
Message-ID: 
 <CAADCt4JG7ck8OqV-LXsXdn99wEfMxvVek-E3izRCro_xn1E3xw@mail.gmail.com>
Subject: Re: ceph and hbase.
To: user@hbase.apache.org
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23 =D0=B4=D0=B5=D0=BA=D0=B0=D0=B1=D1=80=D1=8F 2011 =D0=B3. 22:48 =D0=BF=D0=
=BE=D0=BB=D1=8C=D0=B7=D0=BE=D0=B2=D0=B0=D1=82=D0=B5=D0=BB=D1=8C Todd Lipcon=
 <todd@cloudera.com>=D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB:

> On Tue, Dec 20, 2011 at 12:56 AM, Andrey Stepachev <octo47@gmail.com>
> wrote:
> > I see, that most issues addressed to HA branch.
> > What version this branch is applied to? 0.22 or
> > i should build hadoop from sources?
>
> It's currently only available in the HDFS-1623 branch, which is in
> active development and definitely shouldn't be used unless you plan to
> help us finish debugging it :) There are still some known bugs and
> deficiencies to address before we merge.
>

Looks like this is one of possible scenarios :). We need
some solution for HA, but no one (except MapR) still exists.
So we must use MapR (costs, closed) or debug some
not-ready-yet solution.


>
> The plan is to merge it into 0.23 but not 0.22 - it will hopefully be
> merged in January. We'll also make it available in CDH4 beta releases
> early next year.
>

Sounds good. But still can't find such branch in cloudera (or any other)
github
repositories.
Is it publicly available right now, or it in some private repository?


>
> -Todd
>
> >
> > 20 =D0=B4=D0=B5=D0=BA=D0=B0=D0=B1=D1=80=D1=8F 2011 =D0=B3. 11:46 =D0=BF=
=D0=BE=D0=BB=D1=8C=D0=B7=D0=BE=D0=B2=D0=B0=D1=82=D0=B5=D0=BB=D1=8C Todd Lip=
con <todd@cloudera.com
> >=D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB:
> >
> >> Hi Andrey,
> >>
> >> I don't think anyone has ever run Ceph in a production use case, much
> >> less run it in a production use case with HBase.
> >>
> >> The SPOF problem is currently being addressed and will be available
> >> for production use by the middle of next calendar year. It will be
> >> available for preview/beta usage in Q1 (it's already working in
> >> development setups - feel free to follow HDFS-1623 for details)
> >>
> >> I think you're way better off waiting for the HA NameNode support in
> >> HDFS than going with an unproven FS like Ceph. Ceph certainly has
> >> promise and is a nice design, but it hasn't had the years of pounding
> >> that HDFS has.
> >>
> >> -Todd
> >>
> >> On Mon, Dec 19, 2011 at 10:23 PM, Andrey Stepachev <octo47@gmail.com>
> >> wrote:
> >> > Hi all.
> >> >
> >> > I have requirements to use hbase in several datacenters.
> >> > But HDFS has as SPOF, so we can't use it.
> >> > I plan to use ceph as the file system for hbase.
> >> >
> >> > In general, interested in issues of:
> >> > a) use the hadoop + =D1=81eph in the production environment
> >> > b) using hbase + ceph in the production environment
> >> >
> >> > In particular:
> >> > Ceph Wiki states that the integration of hadoop/ceph has the problem
> in
> >> the
> >> > form of modification dates of the files.
> >> > Does hbase uses modification times for some critical tasks?
> >> >
> >> > --
> >> > Andrey.
> >>
> >>
> >>
> >> --
> >> Todd Lipcon
> >> Software Engineer, Cloudera
> >>
> >
> >
> >
> > --
> > =D0=90=D0=BD=D0=B4=D1=80=D0=B5=D0=B9.
>
>
>
> --
> Todd Lipcon
> Software Engineer, Cloudera
>


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