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https://issues.apache.org/jira/browse/HBASE-1728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12834477#action_12834477
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Jean-Daniel Cryans commented on HBASE-1728:
-------------------------------------------
bq. Does this mean that only one cluster can be associated with one zk
instance? Or is the notion that if mutliple clusters are sharing the one zk
ensemble, then they will be homed (gaol'd) at different areas up in zk ( I
suppose that makes sense - huh - they'd have to be)
I like the way you are able to answer yourself. Yes they have different home
dir so it's ok :P
bq. The change to HLogKey means we can't read old logs. Thats probably fine,
right? Migration requires that there be no hlogs in filesystem?
Right, major version change. Although I did this:
{code}
try {
this.clusterId = in.readByte();
this.scope = in.readInt();
} catch(EOFException e) {
// Means it's an old key, just continue
}
{code}
Will commit with your comments-related fixes. Thanks!
> Column family scoping and cluster identification
> ------------------------------------------------
>
> Key: HBASE-1728
> URL: https://issues.apache.org/jira/browse/HBASE-1728
> Project: Hadoop HBase
> Issue Type: Sub-task
> Reporter: Andrew Purtell
> Assignee: Jean-Daniel Cryans
> Fix For: 0.21.0
>
> Attachments: HBASE-1728.patch, HCD-family-scoping.patch,
> HLogKey-scoping.patch
>
>
> Support column family scoping via a new HCD attribute. Provide initial set of
> scoping constants and javadoc setting expectations for a simple default
> binary scoping policy: replicate, or do not. Make the underlying type Integer
> so more complex edit routing policies are possible. Also identify every
> HLogKey with the original cluster's ID.
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