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https://issues.apache.org/jira/browse/HBASE-50?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Li Chongxin updated HBASE-50:
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Attachment: snapshot-src.zip
snapshot-flowchart.png
One more problem:
When I run the test with standalone ZooKeeper, everything is fine, while
running with MiniZooKeeperCluster a exception might be thrown, although the
output is still correct. Below is the exception stack trace and it shoud be
related with MiniZooKeeperCluster. I don't know if it is a configuration
problem.
===================================================================================
2010-05-06 22:05:27,062 ERROR [Thread-1] server.NIOServerCnxn$Factory$1(82):
Thread Thread[Thread-1,5,main] died
java.nio.channels.CancelledKeyException
at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:55)
at sun.nio.ch.SelectionKeyImpl.interestOps(SelectionKeyImpl.java:64)
at
org.apache.zookeeper.server.NIOServerCnxn$SendBufferWriter.wakeup(NIOServerCnxn.java:927)
at
org.apache.zookeeper.server.NIOServerCnxn$SendBufferWriter.checkFlush(NIOServerCnxn.java:909)
at
org.apache.zookeeper.server.NIOServerCnxn$SendBufferWriter.flush(NIOServerCnxn.java:945)
at java.io.BufferedWriter.flush(BufferedWriter.java:236)
at java.io.PrintWriter.flush(PrintWriter.java:276)
at org.apache.zookeeper.server.NIOServerCnxn$2.run(NIOServerCnxn.java:1089)
=====================================================================================
> Snapshot of table
> -----------------
>
> Key: HBASE-50
> URL: https://issues.apache.org/jira/browse/HBASE-50
> Project: Hadoop HBase
> Issue Type: New Feature
> Reporter: Billy Pearson
> Assignee: Li Chongxin
> Priority: Minor
> Attachments: snapshot-flowchart.png, snapshot-src.zip
>
>
> Havening an option to take a snapshot of a table would be vary useful in
> production.
> What I would like to see this option do is do a merge of all the data into
> one or more files stored in the same folder on the dfs. This way we could
> save data in case of a software bug in hadoop or user code.
> The other advantage would be to be able to export a table to multi locations.
> Say I had a read_only table that must be online. I could take a snapshot of
> it when needed and export it to a separate data center and have it loaded
> there and then i would have it online at multi data centers for load
> balancing and failover.
> I understand that hadoop takes the need out of havening backup to protect
> from failed servers, but this does not protect use from software bugs that
> might delete or alter data in ways we did not plan. We should have a way we
> can roll back a dataset.
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