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https://issues.apache.org/jira/browse/HADOOP-4539?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Shvachko updated HADOOP-4539:
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Attachment: BackupNode.patch
I fixed all find bugs except for one. It is complaining about writing to a
static field {{NameNode.myMetrics}}. This was introduced before. I don't see a
reason why findBugs treats it differently now.
In general I don't also see a reason why {{NameNode.myMetrics}} should be a
static member. I'll file a bug to change this.
> Streaming Edits to a Standby Name-Node.
> ---------------------------------------
>
> Key: HADOOP-4539
> URL: https://issues.apache.org/jira/browse/HADOOP-4539
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Fix For: 0.21.0
>
> Attachments: BackupNode.patch, BackupNode.patch, BackupNode.patch,
> BackupNode.patch, image001.gif, StreamEditsToBN.pdf, StreamEditsToSNN.htm
>
>
> Currently Secondary name-node acts as mere checkpointer.
> Secondary name-node should be transformed into a standby name-node (SNN).
> The long term goal is to make it a warm standby.
> The purpose of this issue is to provide real time streaming of edits to SNN
> so that it contained the up-to-date namespace state.
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