I didn't know such changes... Thanks Tariq...
On Wed, Feb 26, 2014 at 1:03 AM, Mohammad Tariq <[email protected]> wrote: > Just to add on to Ted's comment, ROOT has been dropped. META locations are > now directly stored in ZK. See this > ticket<https://issues.apache.org/jira/browse/HBASE-3171>for more. > > Warm Regards, > Tariq > cloudfront.blogspot.com > > > On Wed, Feb 26, 2014 at 12:54 AM, Ted Yu <[email protected]> wrote: > > > You may have read http://hbase.apache.org/book.html#perf.reading > > > > For BlockCache, see this blog: > > http://www.n10k.com/blog/blockcache-101/ > > > > Cheers > > > > > > On Tue, Feb 25, 2014 at 11:03 AM, Upendra Yadav <[email protected] > > >wrote: > > > > > I have go through no. of documents/slides about HBase read/get > > operation... > > > But I have lot of broken links and question to clear view about how > hbase > > > read operation happen... > > > > > > Like.... > > > Client Communicate to zookeeper and get region server where -ROOT- > table > > > region reside...(And this is in memory) > > > > > > Then getting region server location for .META table region (And this is > > in > > > memory) > > > > > > Then location of region server where region of user table reside by > > > checking start and end rowkey with given GET operation rowkey... > > > > > > then will search 1st in memstore.... if found then return data > > > else > > > BlockCache.... if not then BloomFilter if negative then return not > > > found.... else > > > > > > read from hfile....(how i don't know.. please help me) > > > > > > Bloomfilter and BlockCache update and return data... > > > > > > Is this correct... Please suggest me some good document... > > > > > > Still i have doubt ... how BlockCache LRU works... > > > > > >
