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https://issues.apache.org/jira/browse/HBASE-2195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13097148#comment-13097148
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Ted Yu edited comment on HBASE-2195 at 9/5/11 2:02 PM:
-------------------------------------------------------
If we look at Bytes.readByteArray():
{noformat}
public static byte [] readByteArray(final DataInput in)
throws IOException {
int len = WritableUtils.readVInt(in);
if (len < 0) {
throw new NegativeArraySizeException(Integer.toString(len));
}
{noformat}
we can see that if the new version field is declared as int, we should be able
to serialize it as VInt.
What remains is to customize Bytes.readByteArray() a little bit to fit the
needs for this JIRA.
Long term, I think the mapping from single byte cluserid to uuid clusterid
should be designed/implemented first. This aligns with Lars' effort of writing
the UUID conditionally.
was (Author: [email protected]):
If we look at Bytes.readByteArray():
{noformat}
public static byte [] readByteArray(final DataInput in)
throws IOException {
int len = WritableUtils.readVInt(in);
if (len < 0) {
throw new NegativeArraySizeException(Integer.toString(len));
}
{noformat}
we can see that if the new version field (declared as int), we should be able
to serialize it as VInt.
What remains is to customize Bytes.readByteArray() a little bit to fit the
needs for this JIRA.
Long term, I think the mapping from single byte cluserid to uuid clusterid
should be designed/implemented first. This aligns with Lars' effort of writing
the UUID conditionally.
> Support cyclic replication
> --------------------------
>
> Key: HBASE-2195
> URL: https://issues.apache.org/jira/browse/HBASE-2195
> Project: HBase
> Issue Type: Sub-task
> Components: replication
> Reporter: Jean-Daniel Cryans
> Attachments: 2195-v5.txt, 2195.txt
>
>
> We need to support cyclic replication by using the cluster id of each HlogKey
> and stop replicating when it goes back to the original cluster.
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