hbase-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Suraj Varma <svarma...@gmail.com>
Subject Re: Does HBase use spaces of HDFS?
Date Tue, 08 Mar 2011 06:25:56 GMT
In the standalone mode, HBase uses the local file system as its storage. In
pseudo-distributed and fully-distributed modes, HBase uses HDFS as the
storage.
See http://hbase.apache.org/notsoquick.html for more details on the
different modes.

For details on storage, see
http://www.larsgeorge.com/2009/10/hbase-architecture-101-storage.html
--Suraj

On Mon, Mar 7, 2011 at 9:42 PM, edward choi <mp2893@gmail.com> wrote:

> Sorry for this totally newbie question.
>
> I'm just wondering if HBase uses HDFS space.
>
> I read it in the reference book that HBase table size increases
> automatically as the table entry increases.
> So I am guessing that HBase manages a separate storage other than HDFS.
> (But
> then why does HBase operate on top of HDFS? Truly confusing...)
>
> If HBase doesn't use HDFS space, I can designate only a single machine to
> be
> a HDFS slave, and assign bunch of other machines to be HBase slaves.
> But if HBase does use HDFS space, I'd have balance the ratio of HDFS and
> HBase within my machines.
>
> Could anyone give me a clear heads up?
>
> Ed
>

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