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From Eric Yang <>
Subject Re: [DISCUSSION] Making HBaseWriter default
Date Mon, 22 Nov 2010 19:41:20 GMT
MySQL support has been removed from Chukwa 0.5.  My concern is that the demux process is going
to become two parallel tracks, one works in mapreduce, and another one works in collector.
 It becomes difficult to have clean efficient parsers which works in both places.  From architecture
perspective, incremental updates to data is better than batch processing for near real time
monitoring purpose.  I like to ensure Chukwa framework can deliver Chukwa's mission statement,
hence I standby Hbase as default.  I was playing with Hbase 0.20.6+Pig 0.8 branch last weekend,
I was very impressed by both speed and performance of this combination.  I encourage people
to try it out.


On 11/22/10 10:50 AM, "Ariel Rabkin" <> wrote:

I agree with Bill and Deshpande that we ought to make clear to users
that they don't nee HICC, and therefore don't need either MySQL or

But I think what Eric meant to ask was which of MySQL and HBase ought
to be the default *for HICC*.  My sense is that the HBase support
isn't quite mature enough, but it's getting there.

I think HBase is ultimately the way to go. I think we might benefit as
a community by doing a 0.5 release first, while waiting for the
pig-based aggregation support that's blocking HBase.


On Mon, Nov 22, 2010 at 10:47 AM, Deshpande, Deepak
<> wrote:
> I agree. Making HBase by default would make some Chukwa users life difficult. In my set
up, I don't need HDFS. I am using Chukwa merely as a Log Streaming framework. I have plugged
in my own writer to write log files in Local File system (instead of HDFS). I evaluated Chukwa
with other frameworks and Chukwa had very good fault tolerance built in than other frameworks.
This made me recommend Chukwa over other frameworks.
> By making HBase default option would definitely make my life difficult :).
> Thanks,
> Deepak Deshpande

Ari Rabkin
UC Berkeley Computer Science Department

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