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From Dima Spivak <dspi...@cloudera.com>
Subject Re: Hbase federated cluster for messages
Date Sat, 20 Aug 2016 13:17:30 GMT
Yup.

On Saturday, August 20, 2016, Alexandr Porunov <alexandr.porunov@gmail.com>
wrote:

> So, will it be ok if we have 80 data nodes (8TB on each node) and only one
> namenode? Will it works for the messaging system? We will have 2x
> replication so there are 320 TB of data (per year) (640 TB with
> replication). 130000 R+W ops/sec. Each message 100 bytes or 1024 bytes.
> Is it possible to handle such load with hbase?
>
> Sincerely,
> Alexandr
>
> On Sat, Aug 20, 2016 at 8:44 AM, Dima Spivak <dspivak@cloudera.com
> <javascript:;>> wrote:
>
> > You can easily store that much data as long as you don't have small
> files,
> > which is typically why people turn to federation.
> >
> > -Dima
> >
> > On Friday, August 19, 2016, Alexandr Porunov <alexandr.porunov@gmail.com
> <javascript:;>>
> > wrote:
> >
> > > We are talking about facebook. So, there are 25 TB per month. 15
> billion
> > > messages with 1024 bytes and 120 billion messages with 100 bytes per
> > month.
> > >
> > > I thought that they used only hbase to handle such a huge data If they
> > used
> > > their own implementation of hbase then I haven't questions.
> > >
> > > Sincerely,
> > > Alexandr
> > >
> > > On Sat, Aug 20, 2016 at 1:39 AM, Dima Spivak <dspivak@cloudera.com
> <javascript:;>
> > > <javascript:;>> wrote:
> > >
> > > > I'd +1 what Vladimir says. How much data (in TBs/PBs) and how many
> > files
> > > > are we talking about here? I'd say that use cases that benefit from
> > HBase
> > > > don't tend to hit the kind of HDFS file limits that federation seeks
> to
> > > > address.
> > > >
> > > > -Dima
> > > >
> > > > On Fri, Aug 19, 2016 at 2:19 PM, Vladimir Rodionov <
> > > vladrodionov@gmail.com <javascript:;> <javascript:;>
> > > > >
> > > > wrote:
> > > >
> > > > > FB has its own "federation". It is a proprietary code, I presume.
> > > > >
> > > > > -Vladimir
> > > > >
> > > > >
> > > > > On Fri, Aug 19, 2016 at 1:22 PM, Alexandr Porunov <
> > > > > alexandr.porunov@gmail.com <javascript:;> <javascript:;>>
wrote:
> > > > >
> > > > > > No. There isn't. But I want to figure out how to configure that
> > type
> > > of
> > > > > > cluster in the case if there is particular reason. How facebook
> can
> > > > > handle
> > > > > > such a huge amount of ops without federation? I don't think
that
> > they
> > > > > just
> > > > > > have one namenode server and one standby namenode server. It
> isn't
> > > > > > possible. I am sure that they use federation.
> > > > > >
> > > > > > On Fri, Aug 19, 2016 at 10:08 PM, Vladimir Rodionov <
> > > > > > vladrodionov@gmail.com <javascript:;> <javascript:;>>
> > > > > > wrote:
> > > > > >
> > > > > > > >> I am not sure how to do it but I have to configure
federated
> > > > cluster
> > > > > > > with
> > > > > > > >> hbase to store huge amount of messages (client
to client)
> (40%
> > > > > writes,
> > > > > > > 60%
> > > > > > > >> reads).
> > > > > > >
> > > > > > > Any particular reason for federated cluster? How huge is
huge
> > > amount
> > > > > and
> > > > > > > what is the message size?
> > > > > > >
> > > > > > > -Vladimir
> > > > > > >
> > > > > > > On Fri, Aug 19, 2016 at 11:57 AM, Dima Spivak <
> > > dspivak@cloudera.com <javascript:;> <javascript:;>>
> > > > > > > wrote:
> > > > > > >
> > > > > > > > As far as I know, HBase doesn't support spreading
tables
> across
> > > > > > > namespaces;
> > > > > > > > you'd have to point it at one namenode at a time.
I've heard
> of
> > > > > people
> > > > > > > > trying to run multiple HBase instances in order to
get access
> > to
> > > > all
> > > > > > > their
> > > > > > > > HDFS data, but it doesn't tend to be much fun.
> > > > > > > >
> > > > > > > > -Dima
> > > > > > > >
> > > > > > > > On Fri, Aug 19, 2016 at 11:51 AM, Alexandr Porunov
<
> > > > > > > > alexandr.porunov@gmail.com <javascript:;> <javascript:;>>
> wrote:
> > > > > > > >
> > > > > > > > > Hello,
> > > > > > > > >
> > > > > > > > > I am not sure how to do it but I have to configure
> federated
> > > > > cluster
> > > > > > > with
> > > > > > > > > hbase to store huge amount of messages (client
to client)
> > (40%
> > > > > > writes,
> > > > > > > > 60%
> > > > > > > > > reads). Does somebody have any idea or examples
how to
> > > configure
> > > > > it?
> > > > > > > > >
> > > > > > > > > Of course we can configure hdfs in a federated
mode but as
> > for
> > > me
> > > > > it
> > > > > > > > isn't
> > > > > > > > > suitable for hbase. If we want to save message
from client
> 1
> > to
> > > > > > client
> > > > > > > 2
> > > > > > > > in
> > > > > > > > > the hbase cluster then how hbase know in which
namespace it
> > > have
> > > > to
> > > > > > > save
> > > > > > > > > it? Which namenode will be responsible for that
message?
> How
> > we
> > > > can
> > > > > > > read
> > > > > > > > > client messages?
> > > > > > > > >
> > > > > > > > > Give me any ideas, please
> > > > > > > > >
> > > > > > > > > Sincerely,
> > > > > > > > > Alexandr
> > > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > --
> > > > > > > > -Dima
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > -Dima
> > > >
> > >
> >
> >
> > --
> > -Dima
> >
>


-- 
-Dima

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