Grokbase Groups HBase user March 2009

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68 discussions - 328 posts

  • Hi all, I am using hbase-0.19.1 and hadoop-0.19. My cluster have 5+1 nodes, and there are about 512 regions in HBase (256MB per region). But I found the blocks in HDFS is very unbalanced. Following ...
    Schubert zhangSchubert zhang
    Mar 25, 2009 at 9:12 am
    Apr 1, 2009 at 8:39 am
  • Hi, I have just set up a small Linux machine cluster with 3 physical machines (dual core, with RedHat Enterprise 5.) to run Hadoop and HBase. No virtual machines are involved at this time in the test ...
    Jun LiJun Li
    Mar 27, 2009 at 8:58 am
    Apr 7, 2009 at 1:42 am
  • Hi , all I remember it was not recommended to add many columns (column qualifiers) in Hbase 0.18 Does Hbase 0.19.0 still have this limitation? Thank you for your cooperation, M.
    Michael DagaevMichael Dagaev
    Mar 9, 2009 at 8:23 am
    Mar 16, 2009 at 9:07 am
  • Hi Jean Daniel, I want your help for this issue. I attach the log files, please help analyse it. Thanks. Test env. 5+1 nodes cluster. table: create 'TESTA', {NAME = 'info', VERSIONS = 1, COMPRESSION ...
    Schubert zhangSchubert zhang
    Mar 21, 2009 at 6:39 am
    Mar 23, 2009 at 12:30 pm
  • Hi.I have a small question about MR jobs. Is it possible to run MR job on part of the table ? For example I have MR job running on table and next time when run this job, I want to get only newly ...
    Slava GorelikSlava Gorelik
    Mar 3, 2009 at 4:46 pm
    Mar 6, 2009 at 5:57 pm
  • Hi all, I set up a small HBase cluster on EC2. It works fine internally if all the applications are within EC2. It, however, does not work if i am trying run shell or client program on a external ...
    Yabo-Arber XuYabo-Arber Xu
    Mar 17, 2009 at 8:08 am
    Mar 20, 2009 at 10:05 pm
  • What would be a good schema in HBase to store information pertaining to a many to many graph? I was thinking of having the node id as the row key, the type of relation as the column family, the ...
    Amandeep KhuranaAmandeep Khurana
    Mar 31, 2009 at 8:10 am
    Apr 1, 2009 at 11:36 pm
  • Hello, I have been testing Hbase for several weeks. My test cluster is made of 6 low cost machines (dell studio hybrid, core 2 duo 2Ghz, 4Go, HDD 320 Go). My configurations files : hadoop-site.xml : ...
    Mar 4, 2009 at 5:18 pm
    Mar 27, 2009 at 4:10 am
  • Hi, all It looks like NotServingRegionException start to occur on region servers when the cluster is getting overloaded with too much regions. Is it correct ? Thank you for your cooperation, M.
    Michael DagaevMichael Dagaev
    Mar 26, 2009 at 11:21 am
    Mar 26, 2009 at 9:12 pm
  • Hi all, I am running a MapReduce Job to read files and insert rows into a HBase table. It like a ETL procedure in database world. Hadoop 0.19.1, HBase 0.19.0, 5 slaves and 1 master, DELL2950 server ...
    Schubert zhangSchubert zhang
    Mar 17, 2009 at 7:39 am
    Mar 19, 2009 at 7:05 pm
  • Hi, I am a HBase/Hadoop newbie. Following code (groovy) works, but produces the exception given below: def hbaseConfig = new HBaseConfiguration() admin = new HBaseAdmin(hbaseConfig) println ...
    Vaibhav PuranikVaibhav Puranik
    Mar 26, 2009 at 10:28 pm
    Mar 28, 2009 at 12:04 am
  • Has anyone explored using HDFS/HBase as the underlying storage for an RDF store? Most solutions (all are single node) that I have found till now scale up only to a couple of billion rows in the ...
    Amandeep KhuranaAmandeep Khurana
    Mar 23, 2009 at 11:14 pm
    Mar 24, 2009 at 4:41 am
  • Hi, all Has the configuration files changed in hadoop/hbase 0.19 ? Can we just copy the "conf" directory from hadoop/hbase 0.18 to hadoop/hbase 0.19 as is ? Thank you for your cooperation, M.
    Michael DagaevMichael Dagaev
    Mar 20, 2009 at 2:08 pm
    Mar 20, 2009 at 2:24 pm
  • I am testing the performance of HBase, after about one weeks's test. I found the HBase become more and more slow when inserting data. (3 regionserver, HBase 0.19.1 and hadoop 0.19.2) Each row have ...
    Schubert zhangSchubert zhang
    Mar 19, 2009 at 5:54 am
    Mar 19, 2009 at 6:42 pm
  • Hi I am newbie working on Hadoop - HBase. I am using Hadoop-0.18.0 and HBase-0.18.1. There is some problem with using HBase master when HBase uses HDFS. My Hadoop-site configuration is: ...
    Puri, AseemPuri, Aseem
    Mar 17, 2009 at 7:33 am
    Mar 18, 2009 at 3:12 pm
  • I'm running a pseudo-distributed (for the moment) Hadoop server with HBase on the same server running with 1 master and 1 region. HBase is successfully talking to HDFS, has created the hbase ...
    Cris DanilukCris Daniluk
    Mar 15, 2009 at 4:14 pm
    Mar 16, 2009 at 6:29 pm
  • I've posted a release candidate here: Should we release this candidate as hbase 0.19.1? Please take it for a test spin if you have a chance. ...
    Mar 12, 2009 at 12:30 am
    Mar 14, 2009 at 6:18 am
  • hi,All I am new for HBase and have a couple of questions.and poor in english. now,when I test Hbase insert data meeting some problem my cluster have one master and five region machine base on hadoop ...
    Mar 28, 2009 at 7:12 am
    Mar 31, 2009 at 10:09 pm
  • I was wondering if anyone else out there would like to use hbase to support storing data that does not need random access just insert/delete/scan If we could support a table like this that would ...
    Billy PearsonBilly Pearson
    Mar 27, 2009 at 6:21 am
    Mar 27, 2009 at 10:21 pm
  • Hi, all We are running a small hbase 0.18 cluster. It stopped working now. The master log contains " HStoreScanner failed construction" errors. Restart (stop/start-hbase) does not ...
    Michael DagaevMichael Dagaev
    Mar 19, 2009 at 11:06 am
    Mar 20, 2009 at 7:48 pm
  • Hi all, Today, I encounter a new issue about failure to batchUpdate commit. I am running a program to insert rows into a HBase table, but after long time of batchUpdating, following exception occur: ...
    Schubert zhangSchubert zhang
    Mar 12, 2009 at 11:10 am
    Mar 13, 2009 at 8:28 pm
  • Hi all, I am having trouble with importing a medium dataset into an empty new table. The import runs for about 60 minutes. There is a lot of failed/killed tasks in this scenario and sometime the ...
    Mat HofschenMat Hofschen
    Mar 11, 2009 at 9:15 am
    Mar 12, 2009 at 4:58 pm
  • Hi, all I am trying to migrate my Hbase data base version 0.18.2 locally (on the development machine). Command "hbase migrate upgrade" fails with error "File system version file hbase.version does ...
    Michael DagaevMichael Dagaev
    Mar 5, 2009 at 2:16 pm
    Mar 5, 2009 at 3:06 pm
  • Hi all, I have Index repository by Lucene in Hadoop, I am using Solr for web search interface. How can I using those indexed repositories with Solr web search?
    Trọng Trần BìnhTrọng Trần Bình
    Mar 11, 2009 at 9:37 am
    Mar 14, 2009 at 2:06 am
  • HBase 0.19.0. 5 rangeservers and 1 master, overlay hadoop (5+1). When inserting rows, one rangeserve Shutdown itself. 2009-03-13 19:11:40,335 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: ...
    Schubert zhangSchubert zhang
    Mar 13, 2009 at 1:24 pm
    Mar 13, 2009 at 8:23 pm
  • I have a 5+1 HBase/Hadoop cluster. (5 region server and 1 master)A table TESTTAB with only one column family with 36 qualifiers. A process in the master node use batchUpdate (autoFlush=false) to ...
    Schubert zhangSchubert zhang
    Mar 13, 2009 at 9:41 am
    Mar 13, 2009 at 8:20 pm
  • Hello folks! I'm running a site ( that works on medium sized data sets from the World of Warcraft armory. I'm currently doing everything in MySQL on a "Large" EC2 instance, ...
    Matthew RunoMatthew Runo
    Mar 31, 2009 at 4:21 pm
    Apr 1, 2009 at 1:32 am
  • What are the typical hardware config for a node that people are using for Hadoop and HBase? I am setting up a new 10 node cluster which will have HBase running as well that will be feeding my front ...
    Amandeep KhuranaAmandeep Khurana
    Mar 28, 2009 at 5:07 am
    Mar 30, 2009 at 12:12 am
  • Hi, all Currently, we write all incoming entities using batch update. Recently we realized that many incoming entities already exist. So, we can check for each incoming entity if it already exists ...
    Michael DagaevMichael Dagaev
    Mar 25, 2009 at 9:18 am
    Mar 25, 2009 at 12:45 pm
  • Report two issues I have met: Testbed: 1 master + 3 slaves. 1. after long time running (batch insert data by mapreduce), sometimes I saw following WARN. Is it caused by network issue or other? ...
    Schubert zhangSchubert zhang
    Mar 19, 2009 at 10:43 am
    Mar 19, 2009 at 2:59 pm
  • While loading a large amount of data to a non-empty table using Tablereduce I get the error below. The first 1-3 reduces are usually successful, and then I get this message. This error has occur when ...
    Yair Even-ZoharYair Even-Zohar
    Mar 17, 2009 at 10:20 pm
    Mar 18, 2009 at 2:48 pm
  • I've posted a new release candidate here: Should we release this candidate as hbase 0.19.1? Please take it for a test spin if you have a ...
    Mar 14, 2009 at 4:33 pm
    Mar 17, 2009 at 12:50 am
  • Hi all, So I eventually figured out that HBase is reporting the 'request' metric in X second increments - 10 in my case from the config file. Unfortunately that doesn't really seem to be an ideal ...
    Ryan RawsonRyan Rawson
    Mar 11, 2009 at 7:05 am
    Mar 11, 2009 at 5:04 pm
  • Hi all, I am running a MapReduce job to read regions(row ranges) in Map task. The job can work completely and correctly. But, usually, I find following INFO in hbase regionservre's log file. ...
    Schubert zhangSchubert zhang
    Mar 11, 2009 at 8:38 am
    Mar 11, 2009 at 3:23 pm
  • Hi all, One more newbie question. Is there any way to iterate over all the cells (values of all column families:all columns) of a given table without knowing what columns there are? (I am still ...
    Vaibhav PuranikVaibhav Puranik
    Mar 27, 2009 at 8:29 pm
    Mar 27, 2009 at 10:13 pm
  • Hi, I am new for HBase and have a couple of questions. 1. I have installed HBase and load a couple of millions of data. The file system for HBase is in /tmp diectory. How can I change the directory ...
    Jae JooJae Joo
    Mar 22, 2009 at 9:29 pm
    Mar 24, 2009 at 2:50 am
  • I've got myself a little HBase install up and running on a small Hadoop cluster, currently running... HBase Version 0.19.0, r735381 HBase Compiled Sun Jan 18 14:29:34 PST 2009, stack Hadoop Version ...
    Chris HostetterChris Hostetter
    Mar 23, 2009 at 9:22 pm
    Mar 24, 2009 at 2:45 am
  • Hi, I noticed that the class (The groovy DSL) is not compiling with HBase 0.19. The following code block was not compiling: if ( admin.tableExists( tableName ) ) { ...
    Vaibhav PuranikVaibhav Puranik
    Mar 20, 2009 at 12:31 am
    Mar 23, 2009 at 5:27 pm
  • HBase 0.19.1 is now available for download from The release notes are available at We recommend that all 0.19.0 hbase users ...
    Mar 19, 2009 at 11:50 pm
    Mar 20, 2009 at 3:53 am
  • Hi all We run a small Hbase 0.18 cluster (4 machines). A few days ago the traffic (mostly writes) increased and we started to notice NotServingRegionExceptions. Has anybody run into such a problem ? ...
    Michael DagaevMichael Dagaev
    Mar 18, 2009 at 8:00 am
    Mar 18, 2009 at 12:53 pm
  • Hey Hadoop Fans, It's been a crazy week here at Cloudera. Today we launched our Distribution for Hadoop. This is targeted at Hadoop users who want to use the most recent stable version of Hadoop and ...
    Christophe BiscigliaChristophe Bisciglia
    Mar 17, 2009 at 12:43 am
    Mar 17, 2009 at 5:51 pm
  • Hi I am using Hadoop-0.18.0 and hbase-0.18.0. My Hadoop -site configuration in Pseudo-Distributed Mode is: <configuration <property <name</name <value hdfs://</value ...
    Puri, AseemPuri, Aseem
    Mar 16, 2009 at 11:12 am
    Mar 16, 2009 at 1:31 pm
  • Dear Is it possible to get a Scanner which scans the record in descending order of a column value using IndexedTable. Thanks & Regards R.Bala
    Balamurugan RajendranBalamurugan Rajendran
    Mar 13, 2009 at 7:35 am
    Mar 13, 2009 at 9:23 am
  • I rewrote Michael Gottesman Hbase EC2 Utilities to match the newer release 0.19.0 and after finishing up with the legal stuff (thanks to I loaded them to HBASE-838 Simple usage: ...
    Yair Even-ZoharYair Even-Zohar
    Mar 5, 2009 at 8:44 pm
    Mar 6, 2009 at 6:25 am
  • Hi all, How do you truncate an entire table using the Java API? Shell has a TRUNCATE command, but I can't find any matching functionality in the API itself... all of the HTable.deleteAll() methods ...
    Sean LaurentSean Laurent
    Mar 4, 2009 at 10:25 pm
    Mar 4, 2009 at 10:43 pm
  • Hi, I'm not sure how the method filterRowKey(byte[] rowKey) of the RowFilterInterface works. I have the feeling that this method may be called with null as parameter by HBase. When is the rowKey ...
    Michael SeiboldMichael Seibold
    Mar 3, 2009 at 1:04 pm
    Mar 4, 2009 at 7:45 am
  • Does HBase 0.19.1 support any kind of secondary searching? Can I do something similar to "where columnfamily:qualifier = 'some value'" in HBase? Regards, Vaibhav
    Vaibhav PuranikVaibhav Puranik
    Mar 30, 2009 at 10:02 pm
    Mar 31, 2009 at 2:04 am
  • Hi, I was researching for HBase schema design examples. I found some good discussion in few previous mailing list posts. I have added relevant portion of those discussions as a last item on Hbase ...
    Vaibhav PuranikVaibhav Puranik
    Mar 30, 2009 at 8:39 pm
    Mar 30, 2009 at 9:09 pm
  • Hi, all HBASE_OPTS in defines java options for all hbase processes, i.e. master, region servers, shell, etc. use the same java options. For example, if we add JMX port to HBASE_OPTS it ...
    Michael DagaevMichael Dagaev
    Mar 23, 2009 at 10:15 am
    Mar 23, 2009 at 8:17 pm
  • Hi I am very new to HBase and using it from few days. I have installed and configure my HBase. But before actually working on HBase I want clear some concepts. I want to know how read and write are ...
    Puri, AseemPuri, Aseem
    Mar 23, 2009 at 3:19 pm
    Mar 23, 2009 at 3:22 pm
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52 users for March 2009

Schubert zhang: 62 posts Stack: 39 posts Jean-Daniel Cryans: 38 posts Michael Dagaev: 27 posts Ryan Rawson: 17 posts Andrew Purtell: 15 posts Puri, Aseem: 11 posts Vaibhav Puranik: 10 posts Jonathan Gray: 8 posts Yabo-Arber Xu: 8 posts Amandeep Khurana: 7 posts Billy Pearson: 6 posts Slava Gorelik: 6 posts Yair Even-Zohar: 5 posts Cris Daniluk: 4 posts Erik Holstad: 4 posts Liu Yan: 4 posts Mat Hofschen: 4 posts Ryan Smith: 4 posts Zxh116116: 4 posts
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