Nice. Ted. Is there any reason why we can't do it online?
On Tue, Jan 14, 2014 at 10:47 AM, Ted Yu <[email protected]> wrote: > Upender: > For 15.2.2 Merge, please note the following condition: > > LOG.info("Verifying that HBase is not running..."); > try { > HBaseAdmin.checkHBaseAvailable(getConf()); > LOG.fatal("HBase cluster must be off-line."); > > Cheers > > > On Tue, Jan 14, 2014 at 10:40 AM, Vladimir Rodionov > <[email protected]>wrote: > > > I have never tried this before but I think the following should work: > > > > 1. Alter your table: > > > > habse> alter 't1', METHOD => 'table_att', MAX_FILESIZE => '5000000000' > > (place your own number here) > > > > 2. Merge regions: > > > > http://hbase.apache.org/book/ops.regionmgt.html > > > > > > > > > > On Tue, Jan 14, 2014 at 7:21 AM, Upender Nimbekar < > > [email protected]> wrote: > > > > > Hi, > > > Does anyone have any experience rebuidling the HBASE table to reduce > the > > > number of regions. I am currently dealing with a situation where the > no. > > of > > > regions per RS have gone up quite significantly (500 per RS) and > thereby > > > causing some performance issues. This is how I am thinking of bringing > it > > > down: > > > > > > increase the hbase.hregion.max.filesize from 500 MB to 2 GB > > > > > > And the rebuild the HBASE table. I am assuming if after table rebuild, > I > > > should see the no. of regions come down to more than half. I would > > > basically like to stay within HBASE suggested no. of regions per RS > which > > > is about 50-200. > > > > > > Please suggest if someone has any experience doing it. > > > > > > Thanks > > > Upen > > > > > >
