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From Aditya <adityakish...@gmail.com>
Subject Re: About Storage Plugin Instance Broadcast
Date Fri, 27 Jun 2014 21:36:48 GMT
The configuration file "storage-plugins.json" is no longer used by Drill.

Any change in the plugin configuration is stored only in the persistent
store (Zookeeper by default).


On Fri, Jun 27, 2014 at 12:09 AM, mufy <mufeed.usman@gmail.com> wrote:

> Hello Anil,
>
> Hmm... so the ZK will have the info. Agreed. But what about the statement
> where it says that any new storage plugin added/updated will be broadcast
> to all the nodes running drillbit service. I took that statement to mean -
> the config file will be synchronized across all the nodes running the
> drillbit service. Did I get it wrong?
>
>
> ---
> Mufeed Usman
> My LinkedIn <http://www.linkedin.com/pub/mufeed-usman/28/254/400> | My
> Social Cause <http://www.vision2016.org.in/> | My Blogs : LiveJournal
> <http://mufeed.livejournal.com>
>
>
>
>
>
> On Fri, Jun 27, 2014 at 11:57 AM, AnilKumar B <akumarb2010@gmail.com>
> wrote:
>
> > Hi Murfy,
> >
> > Based on my understanding, registered storage plugin info will be stored
> on
> > ZK. As below.
> >
> > [zk: localhost:2181(CONNECTED) 10] ls /drill/sys.storage_plugins
> > [hive, cp, dfs, hbase]
> > [zk: localhost:2181(CONNECTED) 11] get /drill/sys.storage_plugins/hbase
> > {
> >   "type" : "hbase",
> >   "config" : {
> >     "hbase.zookeeper.quorum" : "localhost",
> >     "hbase.zookeeper.property.clientPort" : "2181"
> >   },
> >   "enabled" : true
> > }
> > cZxid = 0x428
> > ctime = Tue Jun 24 13:30:18 IST 2014
> > mZxid = 0x450
> > mtime = Tue Jun 24 13:31:41 IST 2014
> > pZxid = 0x428
> > cversion = 0
> > dataVersion = 1
> > aclVersion = 0
> > ephemeralOwner = 0x0
> > dataLength = 157
> > numChildren = 0
> > [zk: localhost:2181(CONNECTED) 12] get /drill/sys.storage_plugins/cp
> > {
> >   "type" : "file",
> >   "enabled" : true,
> >   "connection" : "classpath:///",
> >   "workspaces" : null,
> >   "formats" : null
> > }
> > cZxid = 0x426
> > ctime = Tue Jun 24 13:30:18 IST 2014
> > mZxid = 0x426
> > mtime = Tue Jun 24 13:30:18 IST 2014
> > pZxid = 0x426
> > cversion = 0
> > dataVersion = 0
> > aclVersion = 0
> > ephemeralOwner = 0x0
> > dataLength = 118
> > numChildren = 0
> > [zk: localhost:2181(CONNECTED) 13]
> >
> > Thanks,
> > B Anil Kumar.
> >
> > Thanks & Regards,
> > B Anil Kumar.
> >
> >
> > On Fri, Jun 27, 2014 at 11:12 AM, mufy <mufeed.usman@gmail.com> wrote:
> >
> > > Stated here
> > >
> > >
> >
> https://cwiki.apache.org/confluence/display/DRILL/Connecting+Apache+Drill+to+Data+Sources
> > > that,
> > >
> > > "When you add or update storage plugin instances on one node, Drill
> > > broadcasts the information to all of the other Drill nodes so they have
> > > identical storage plugin instances registered. You do not need to
> restart
> > > any of the Drillbits when you add or update a storage plugin instance."
> > >
> > > Does that mean if I were to have the following on one node:
> > > [root@mufeed-drill1 ~]# cat
> > >
> > >
> >
> /opt/mapr/drill/drill-1.0.0/apache-drill-1.0.0-m2-incubating-SNAPSHOT/conf/storage-plugins.json
> > > {
> > >   "storage": {
> > >
> > >     dfs: {
> > >       type: "file",
> > >       connection: "maprfs:///"
> > >     },
> > >
> > >     cp: {
> > >       type: "file",
> > >       connection: "classpath:///"
> > >     },
> > >
> > >     cp1: {
> > >       type: "file",
> > >       connection: "classpath:///"
> > >     },
> > >       }
> > > }
> > >
> > > The same content would get replicated to other nodes, on a file content
> > > level? If yes, I do not see that happening. If not, please clarify.
> > >
> > > ---
> > > Mufeed Usman
> > > My LinkedIn <http://www.linkedin.com/pub/mufeed-usman/28/254/400> | My
> > > Social Cause <http://www.vision2016.org.in/> | My Blogs : LiveJournal
> > > <http://mufeed.livejournal.com>
> > >
> >
>

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