[ https://issues.apache.org/jira/browse/HADOOP-8232?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steve Loughran updated HADOOP-8232: ----------------------------------- Status: Patch Available (was: Open) > Provide a command line entry point to view/test topology options > ---------------------------------------------------------------- > > Key: HADOOP-8232 > URL: https://issues.apache.org/jira/browse/HADOOP-8232 > Project: Hadoop Common > Issue Type: Sub-task > Components: util > Affects Versions: 0.23.1 > Reporter: Steve Loughran > Assignee: Steve Loughran > Priority: Minor > Attachments: HADOOP-8232.patch, HADOOP-8232.patch > > > Add a new command line entry point "topo" with commands for preflight > checking of a clusters topology setup. > The initial operations would be to list the implementation class of the > mapper, and attempt to load it, resolve a set of supplied hostnames, then > dump the topology map after the resolution process. > Target audience: > # ops teams trying to get a new/changed script working before deploying it on > a cluster. > # someone trying to write their first script. > Resolve and list the rack mappings of the given host > {code} > hadoop topo test [host1] [host2] ... > {code} > This would load the hostnames from a given file, resolve all of them and list > the results: > {code} > hadoop topo testfile filename > {code} > This version is intended for the ops team who have a list of hostnames, IP > addresses. > * Rather than just list them, the ops team may want to mandate that there > were no /default-rack mappings found, as that is invariably a sign that the > script isn't handling a hostname properly. > * No attempt to be clever and do IP address resolution, FQDN to hostname > mapping, etc. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira