Mailing-List: contact giraph-dev-help@incubator.apache.org; run by ezmlm
Precedence: bulk
Reply-To: giraph-dev@incubator.apache.org
Date: Tue, 13 Dec 2011 19:14:30 +0000 (UTC)
From: "Avery Ching (Created) (JIRA)" <jira@apache.org>
To: giraph-dev@incubator.apache.org
Message-ID: 
 <1672378465.6813.1323803670788.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Created] (GIRAPH-104) Save half of maximum memory used from
 messaging
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit

Save half of maximum memory used from messaging
-----------------------------------------------

                 Key: GIRAPH-104
                 URL: https://issues.apache.org/jira/browse/GIRAPH-104
             Project: Giraph
          Issue Type: Improvement
            Reporter: Avery Ching
            Priority: Critical


Currently, the amount of memory that Giraph uses for messaging is huge.  This JIRA will reduce the messaging memory by half and provide periodic updates of memory for debugging.  Details are below:

Refactored RandomMessageBenchmark to an internal vertex class.  Added aggregators to RandomMessagesBenchmark to track bytes, messages, and time for the messaging.  Adjusted the postSuperstep() to be called after the flush() for more accurate timings.

Added periodic minute updates for message flushing (which can take a while, especially on the memory benchmark).  This helps to see how progress is going and gives an ETA.

Memory optimizations include:
- Clear the message list after computation 
- Free vertex messages on the source as the flush is going on 
- TreeMap -> HashMap for VertexMutations
- Sizing the ArrayList properly in transientInMessages


--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira