For item 1, I was also looking to find out the region server name which hosts .META.
Thanks On Fri, Jul 23, 2010 at 3:51 PM, Stack <[email protected]> wrote: > On Fri, Jul 23, 2010 at 2:40 PM, Ted Yu <[email protected]> wrote: > > Hi, > > I am looking for HBase API for getting the following information: > > 1. is Meta table available - I found > > RegionServerOperation.metaTableAvailable() but it is protected > > Thats not what you think it is Ted. > > To see if meta is available, do a Scan on it every so often. You can > open a Scanner -- via thrift if you are using perl, or write a bit of > jruby and have it return a non-zero exit code on fail -- on it as you > would any other. If the scan does not complete in some time then its > not deployed. > > > > 2. I found ProcessRegionStatusChange.metaRegionAvailable() which is also > > protected > > Yeah, this is stuff internal to the servers; it won't get you what you > want. > > > 3. cluster statistics: the total number of tables, the total space > consumed > > by all the tables > > > > Total number of tables is something you'd have to do yourself I'd say. > Given the above meta scan, look at the row names and when their > prefix changes -- their prefix is the table name the region belongs > too, increment your table count. > > To see how much space is being used by hbase, thats ./bin/hadoop fs > -dus /HBASE.ROOTDIR parsing whatever it returns. > > St.Ack > > > The goal is to call the above APIs from Perl library our Ops has > developed > > to facilitate cluster management. > > > > Thanks > > >
