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From Mikael Sitruk <mikael.sit...@gmail.com>
Subject Re: ceph and hbase.
Date Wed, 28 Dec 2011 15:52:21 GMT
On Dec 24, 2011 10:40 PM, "Andrey Stepachev" <octo47@gmail.com> wrote:
>
> 23 декабря 2011 г. 22:48 пользователь Todd Lipcon <todd@cloudera.com
>написал:
>
> > 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.
>
>
You have also the option of DB, with avatar node,  the code is available on
the net
regarding mapr you have their m3 version which is free as far as I
remember.
Mikael.S
> >
> > 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 декабря 2011 г. 11:46 пользователь Todd Lipcon <todd@cloudera.com
> > >написал:
> > >
> > >> 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 + сeph 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
> > >>
> > >
> > >
> > >
> > > --
> > > Андрей.
> >
> >
> >
> > --
> > Todd Lipcon
> > Software Engineer, Cloudera
> >
>
>
>
> --
> Андрей.

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