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From " Marcos Ortiz Valmaseda" <mlor...@uci.cu>
Subject Re: Slower batch write performance in CDH4
Date Wed, 28 Nov 2012 19:19:51 GMT
Regards, Mark.
The best way to answer that is in the CDH mailing lists.

----- Mensaje original -----
De: 
Para: user@hbase.apache.org
Enviados: MiƩrcoles, 28 de Noviembre 2012 13:37:38
Asunto: Slower batch write performance in CDH4

Hi,

We have been testing CDH4.1 batch write performance and have found that it
is almost an order of magnitude slower than existing clusters on CDH3.

We have a similar configuration in terms of hardware, topology, and
replication factor.

Our test sends a batches of 25 PUT and DELETE operations. Each batch has
exclusively one or the other of those two types. The performance we are
seeing with CDH4.1 is ranging from 800-1200ms consistently  We run the test
for several minutes with no variation in performance. The performance we
see in CDH3 is around 20-110ms consistently.

Is anyone else seeing performance similar to this for batch writes?

Thanks in advance,
Mark


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10mo. ANIVERSARIO DE LA CREACION DE LA UNIVERSIDAD DE LAS CIENCIAS INFORMATICAS...
CONECTADOS AL FUTURO, CONECTADOS A LA REVOLUCION

http://www.uci.cu
http://www.facebook.com/universidad.uci
http://www.flickr.com/photos/universidad_uci

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