You are viewing a plain text version of this content. The canonical link for it is here.
Posted to common-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2009/06/14 08:34:07 UTC
[jira] Assigned: (HADOOP-5598) Implement a pure Java CRC32
calculator
[ https://issues.apache.org/jira/browse/HADOOP-5598?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon reassigned HADOOP-5598:
-----------------------------------
Assignee: Todd Lipcon (was: Owen O'Malley)
> Implement a pure Java CRC32 calculator
> --------------------------------------
>
> Key: HADOOP-5598
> URL: https://issues.apache.org/jira/browse/HADOOP-5598
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Reporter: Owen O'Malley
> Assignee: Todd Lipcon
> Attachments: crc32-results.txt, hadoop-5598.txt, TestCrc32Performance.java
>
>
> We've seen a reducer writing 200MB to HDFS with replication = 1 spending a long time in crc calculation. In particular, it was spending 5 seconds in crc calculation out of a total of 6 for the write. I suspect that it is the java-jni border that is causing us grief.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.