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 "Marco Nicosia (JIRA)" <ji...@apache.org> on 2008/03/20 03:40:25 UTC
[jira] Created: (HADOOP-3057) DataNode to send block reports to
multiple namenodes?
DataNode to send block reports to multiple namenodes?
-----------------------------------------------------
Key: HADOOP-3057
URL: https://issues.apache.org/jira/browse/HADOOP-3057
Project: Hadoop Core
Issue Type: Improvement
Reporter: Marco Nicosia
Priority: Minor
I have this theory that I could test the memory footprint of a new version of the Hadoop namenode, without interrupting a running instance. We could shut down the secondary namenode process, and run a new version of the namenode code on the image file found on the secondary namenode server.
But just running on the image file wouldn't be enough. It'd be great if I could get a real feel by having all the block reports also make their way to my fake namenode.
Would it be possible for datanodes to report to two different namenodes, even if only one is the "active, live" namenode? (I understand that this wouldn't work if the format of the block report, or worse, the rpc layer, were incompatible.)
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Updated: (HADOOP-3057) DataNode to send block reports to
multiple namenodes?
Posted by "Robert Chansler (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-3057?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Chansler updated HADOOP-3057:
------------------------------------
Component/s: dfs
> DataNode to send block reports to multiple namenodes?
> -----------------------------------------------------
>
> Key: HADOOP-3057
> URL: https://issues.apache.org/jira/browse/HADOOP-3057
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Reporter: Marco Nicosia
> Priority: Minor
>
> I have this theory that I could test the memory footprint of a new version of the Hadoop namenode, without interrupting a running instance. We could shut down the secondary namenode process, and run a new version of the namenode code on the image file found on the secondary namenode server.
> But just running on the image file wouldn't be enough. It'd be great if I could get a real feel by having all the block reports also make their way to my fake namenode.
> Would it be possible for datanodes to report to two different namenodes, even if only one is the "active, live" namenode? (I understand that this wouldn't work if the format of the block report, or worse, the rpc layer, were incompatible.)
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.