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https://issues.apache.org/jira/browse/HDFS-6156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13947465#comment-13947465
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Haohui Mai commented on HDFS-6156:
----------------------------------
The current JMX API looks like the following:
{code}
name: "Hadoop:service=NameNode,name=SnapshotInfo",
modelerType: "org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotManager",
SnapshotStats: {
directory: [
{
group: "supergroup",
modificationTime: 1395768950823,
owner: "hmai",
path: "/test",
permission: 755,
snapshotNumber: 1,
snapshotQuota: 65536
}
],
snapshots: [
{
modificationTime: 1395768950823,
snapshotDirectory: "/test/.snapshot/s20140325-103550.819",
snapshotID: "s20140325-103550.819",
}
]
}
{code}
I propose to inline {{SnapshotStats}, that is to return something like the
following:
{code}
name: "Hadoop:service=NameNode,name=SnapshotInfo"
modelerType: "org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotManager"
snapshottableDirectories: [
{
group: "supergroup",
modificationTime: 1395768950823,
owner: "hmai",
path: "/test",
permission: 755,
snapshotNumber: 1,
snapshotQuota: 65536
}
]
snapshots: [
{
modificationTime: 1395768950823,
snapshotDirectory: "/test/.snapshot/s20140325-103550.819",
snapshotID: "s20140325-103550.819"
]
}
{code}
> Simplify the JMX API that provides snapshot information
> -------------------------------------------------------
>
> Key: HDFS-6156
> URL: https://issues.apache.org/jira/browse/HDFS-6156
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Haohui Mai
>
> HDFS-5196 introduces a set of new APIs that provide snapshot information
> through JMX. Currently. The API nests {{SnapshotDirectoryMXBean}} into
> {{SnapshotStatsMXBean}}, creating another layer of composition.
> This jira proposes to inline {{SnapshotDirectoryMXBean}} into
> {{SnapshotStatsMXBean}} and to simplify the API.
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