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https://issues.apache.org/jira/browse/HDFS-311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12885558#action_12885558
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Diego Marron commented on HDFS-311:
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Hello guys, my name is Diego and I'm interested on finish this modification.
I was thinking in follow the design document uploaded by luca on august 2009
(HDFS-311-design-document.pdf).
As far as i could see, we need a new class (device) and modify fsimage to work
with and arraylist of devices instead of storagedir. Then make all the changes
necesary to make everything work.
The doc also talks about 2 Device subclasses: JournalDevice (device for
journaling) and ImageDevice (device for namespace storage: fsimage) from which
we will get the apropriate I/O streams.
So if we want to implement a new Journaling device it should extend
JournalDevice and take care of initialize its I/O streams.
Are you agree with what this doc says/proposes? or you think there is a better
way to acomplish that?
Thank you guys!!
Diego.
> Modifications to enable multiple types of logging
> --------------------------------------------------
>
> Key: HDFS-311
> URL: https://issues.apache.org/jira/browse/HDFS-311
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Luca Telloli
> Assignee: Luca Telloli
> Attachments: HADOOP-5188.patch, HADOOP-5188.patch, HADOOP-5188.patch,
> HADOOP-5188.patch, HADOOP-5188.patch, HADOOP-5188.patch, HADOOP-5188.pdf,
> HDFS-311-complete.patch, HDFS-311-design-document.pdf, HDFS-311.patch,
> HDFS-311.patch
>
>
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