Aaron T. Myers created HDFS-3405:
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Summary: Checkpointing should use HTTP POST or PUT instead of
GET-GET to send merged fsimages
Key: HDFS-3405
URL: https://issues.apache.org/jira/browse/HDFS-3405
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 1.0.0
Reporter: Aaron T. Myers
As Todd points out in [this
comment|https://issues.apache.org/jira/browse/HDFS-3404?focusedCommentId=13272986&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13272986],
the current scheme for a checkpointing daemon to upload a merged fsimage file
to an NN is to issue an HTTP get request to tell the target NN to issue another
GET request back to the checkpointing daemon to retrieve the merged fsimage
file. There's no fundamental reason the checkpointing daemon can't just use an
HTTP POST or PUT to send back the merged fsimage file, rather than the
double-GET scheme.
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