[
https://issues.apache.org/jira/browse/HBASE-3833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13027530#comment-13027530
]
Vishal Kathuria commented on HBASE-3833:
----------------------------------------
Hi,
I have started implementing this and below is a mini-spec. Could you pls look
through it and let me know if you have any comments.
Functionality
1. The semantics of the include and exclude lists would be identical to Hadoop.
If the include list is empty, then universal include set is assumed. exclude
list takes precedence over include list.
2. Adding a node to exclude list + issuing a refresh using the command line
utility will trigger ServerManager::expireServer for an already online server.
This is the same code path that happens when the node goes down.
3. Nodes in excludeList (or the nodes which are not in include list) will not
be allowed to join.
4. The list will support hostname:port type of entries, where port is optional.
Even though in production we wouldn't have multiple regionservers per node, I
am doing this to make testing easier on dev servers.
Tools
For the command line utility, there will be a new command to refresh server
list that will be implemented in HBaseAdmin.
HBaseAdmin will call into a method that will be added to HMaster and
HMasterInterface. As mentioned above, if a node is added to excludeList or is
removed from include list, it will be expired. If a node is added to the
includeList, no action will be taken.
The command to refresh server list will be exposed in the hbase shell as well.
Nicolas: 'bin/hbase-daemon.sh stop regionserver' kills the region server
process. I am proposing that we don't try to do that. In the scenario that
Dhruba mentioned to me, the regionserver node might be sick and we may not be
able to kill it.
Dhruba: Other than the command line utility to refresh the server list, are
there any other tools that we need to provide?
Thanks!
> ability to support includes/excludes list in Hbase
> --------------------------------------------------
>
> Key: HBASE-3833
> URL: https://issues.apache.org/jira/browse/HBASE-3833
> Project: HBase
> Issue Type: Improvement
> Components: client, regionserver
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
>
> An HBase cluster currently does not have the ability to specify that the
> master should accept regionservers only from a specified list. This helps
> preventing administrative errors where the same machine could be included in
> two clusters. It also allows the administrator to easily remove un-ssh-able
> machines from the cluster.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
