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| Java method performance issue |
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| angka |
 Posted: Mon Jun 06, 2011 2:42 am Post subject: Java method performance issue |
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Chevalier
Joined: 20 Sep 2005
Posts: 406
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Hi,
I created a java class to generate sha2 hash using java library. I invoked the method using java application and it took only 20 seconds to generate the message digest for a gigabtye file but when i invoked the same method using compute node or java compute node, it took around 5 mins or more.
Anyone has any idea what is wrong?
Thank you. |
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| lancelotlinc |
| Posted: Mon Jun 06, 2011 4:28 am Post subject: |
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Jedi Knight
Joined: 22 Mar 2010
Posts: 4941
Location: Bloomington, IL USA
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Which node did you use, the compute node or the Java Compute Node? Is this performance test being conducted on your Windows laptop?
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| angka |
| Posted: Mon Jun 06, 2011 5:56 pm Post subject: |
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Chevalier
Joined: 20 Sep 2005
Posts: 406
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Hi,
I tested both the nodes. The result is the same. Ya I ran the performance test on a desktop but with the same piece of code, running on the same desktop it is significantly faster.
I will provide the source in a while.
Thanks |
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| mqjeff |
| Posted: Tue Jun 07, 2011 2:09 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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Are you timing the full flow?
Are you timing the sha1 algorithm from the point at which message broker starts to invoke this method, or from when you put a message on the input node that starts the flow?
Are you giving the sha1 algorithm a fully flattened bitstream - a BLOB message - in the same way that the standalone java class has access to the stream of bytes that represents the file?
Or are you parsing the gigabyte message into a logical message tree and then flattening it again?
Do you see a difference in performance of your standalone application if you use the Broker's java runtime to execute it rather than whatever JVM is already on your shell? |
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