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Date: Thu, 17 Feb 2011 09:21:04 -0800
Message-ID: <AANLkTin9KuFcx2kAbyCbXeGOZhX9QQekVHNj191iuRyF@mail.gmail.com>
Subject: Re: Hbase Column Families
From: Stack <stack@duboce.net>
To: user@hbase.apache.org
Content-Type: text/plain; charset=ISO-8859-1

On Thu, Feb 17, 2011 at 5:57 AM, Usman Waheed <usmanw@opera.com> wrote:
> I am a newbie to Hbase and am testing on a small 3 node cluster running
> Hadoop 0.20.2 and Hbase 0.89.
>

Please use 0.90 and an hadoop that supports append.  See
http://hbase.apache.org/notsoquick.html#hadoop

> Is there a limit in Hbase on how many versions of a cell one can keep record
> of under a given column family?

The upper bound is Integer.MAX_VALUE.

> I suspect that if i store too many versions of the same cell data over time
> it can become a potential performance issue within Hbase.
>

It could but we'll also be adding optimizations to skip cells with
lots of versions.

St.Ack