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Re: Hbase scans taking a lot of time - HBase - [mail # user]
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...Vibhav, Hive submits a map-reduce job to hdfs cluster.* How many node cluster you have?* taking Do you have 'order by' or 'group by' clause in you query? Queries take longe...
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Author: Alok Kumar,
2013-01-26, 06:07
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Re: how to get the record number from hbase - HBase - [mail # user]
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...Hi, See here https://blogs.apache.org/hbase/entry/coprocessor_introduction for Coprocessor Introduction. It's the first place you should look for . It has couple of example as well &nb...
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Author: Alok Kumar,
2013-01-05, 07:47
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Re: Retrieving rows with specific values using SinglieColumnValueFilter - HBase - [mail # user]
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...Hi, You have set MUST_PASS_ALL. which mean both (filter1 && filter2) must be true on any single row, And it ll never happen(both condition true), that's why it is not fetching any resu...
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Author: Alok Kumar,
2012-10-16, 19:08
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Re: HBase Replication : Do I need to create table programmatically on Replica Cluster? - HBase - [mail # user]
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...Thank You JD. Now I can update my codebase accordingly. -Alok On Wed, Jul 25, 2012 at 8:28 PM, Jean-Daniel Cryans wrote:...
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Author: Alok Kumar,
2012-07-25, 16:48
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HBase Replication : Do I need to create table programmatically on Replica Cluster? - HBase - [mail # user]
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...Hello, I've two Hadoop+HBase cluster setup (production + BackUp in different region) I'm using HBase Replication. Q 1. Do I need to create table programmatically on Backup cluste...
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Author: Alok Kumar,
2012-07-25, 08:34
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Re: Hbase bkup options - HBase - [mail # user]
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...Hello everyone, I too have similar use-case, where I've setup a separate HBase Replica Cluster. and enabled 'Replciation_Scope' for tables. Q. Do I need to create 'table + ColFam...
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Author: Alok Kumar,
2012-07-23, 16:24
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Re: HBase Cannot Start Again After Sudden Power-Off - HBase - [mail # user]
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...hi, you should try looking into log dir ( $HBASE_HOME/logs ), look for HMaster logs in "hbase--master-.log files. It'll tell you exact region why HBase is not coming up.. or try ...
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Author: Alok Kumar,
2012-07-22, 11:52
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Re: Hbase Replication - HBase - [mail # user]
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...Hi All, We are going to setup two clusters(Master-Slave) for disaster recovery. If Custer1 goes down.. HBase client will connect to Slave Custer2, then I can use copyTable command to u...
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Author: Alok Kumar,
2012-06-23, 11:32
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Re: : question on filters - HBase - [mail # user]
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...Hi, try creating a FilterList and attach it to scan object. A FilterList may contain any number of filters, with MUSTPASS.ALL or MUSTPASS.ONE condition. This way scan.setFilter(y...
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Author: Alok Kumar,
2012-05-25, 18:52
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Re: improve performance of a MapReduce job with HBase input - HBase - [mail # user]
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...Hi, you can make use of 'setCaching' method of your scan object. Eg: Scan objScan = new Scan(); objScan.setCaching(100); // set it to some integer, as per ur use case. http...
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Author: Alok Kumar,
2012-05-25, 18:24
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