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https://issues.apache.org/jira/browse/HADOOP-5188?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luca Telloli updated HADOOP-5188:
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Attachment: HADOOP-5188.patch
In this newer version I'm trying to modify the open() method to make use of the
class LoggingDevice. Basically the idea would be the following:
CustomLoggingDevice would implement LoggingDevice, and contain all the
information needed to configure the custom device when the
getNewInputStreamInstance() and getNewOutputStreamInstance() methods are
called. The two methods should return an instance of the implementation of the
EditLogInput/OutputStream class for the specific type of logging.
open() should then use this method to instanciate a new EditLogOutputStream()
for each logging device.
Unfortunately as it is this patch doesn't pass all unit tests, and I guess the
problem is related to the fact that storage directories are used in three
modes, IMAGE, IMAGE_AND_EDITS, and EDITS. Somehow I'd get rid of the mixed mode
if that was possible but I don't exactly how to proceed, so any help would be
appreciated.
This patch contains HADOOP-5721.
> Modifications to enable multiple types of logging
> --------------------------------------------------
>
> Key: HADOOP-5188
> URL: https://issues.apache.org/jira/browse/HADOOP-5188
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Affects Versions: 0.20.0
> Reporter: Luca Telloli
> Fix For: 0.21.0
>
> Attachments: HADOOP-5188.patch, HADOOP-5188.patch, HADOOP-5188.patch,
> HADOOP-5188.pdf
>
>
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