Grokbase Groups HBase user June 2010
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86 discussions - 506 posts

  • Hi Anurag, Part of the big patch for HBASE-2001 up on JIRA, the RegionObserver interface, is available in a tracked branch of HBase trunk up on Github: http://github.com/apurtell/hbase-coprocessor I ...
    Andrew PurtellAndrew Purtell
    Jun 7, 2010 at 11:28 pm
    Jun 10, 2010 at 4:11 pm
  • I am trying to understand the reasons behind Hbase throwing OOME when trying to run updates (the updates include insertions of new rows, modifications of existing rows and deletions).. I am getting ...
    Vidhyashankar VenkataramanVidhyashankar Venkataraman
    Jun 9, 2010 at 6:03 pm
    Jul 14, 2010 at 9:15 pm
  • Hi everyone! Has someone noticed same behaviour of hbase-0.20.5 after upgrade from 0.20.3? $hadoop jar hbase/hbase-0.20.5-test.jar sequentialWrite 1 10/06/29 16:03:21 INFO zookeeper.ZooKeeper: Client ...
    Stanislaw KogutStanislaw Kogut
    Jun 29, 2010 at 1:22 pm
    Jul 7, 2010 at 12:23 am
  • For Socorro, we currently have a 15 node HBase 0.20.3 cluster. The hardware is dual hyperthreaded quads with 24GB of RAM (RS JVM is allocated 8GB). HDFS Health reports that we are currently using ...
    Daniel EinspanjerDaniel Einspanjer
    Jun 8, 2010 at 12:52 am
    Jun 25, 2010 at 12:36 am
  • Hi all, We have a HBase table with a column family. Every row can have millions of columns in the column family. Thus the structure is: rowKey: {data: {string1:0, string2:5, string3:7, string4:89, ...
    Vaibhav PuranikVaibhav Puranik
    Jun 17, 2010 at 6:18 pm
    Jun 21, 2010 at 5:19 pm
  • Hi all, I wrote a custom filter and used it with scan. I am getting the following exceptions. If I use any built-in filters, it works fine. I searched around and one of the suggestions was to ...
    Raghava MutharajuRaghava Mutharaju
    Jun 3, 2010 at 8:17 pm
    Jun 5, 2010 at 6:52 am
  • We're using MapReduce to process big csv-ish flat files and bring the data in as HBase rows. As part of our HBase schema, we maintain counts of various types of rows; these counts are stored as ...
    MlaffoonMlaffoon
    Jun 10, 2010 at 5:50 pm
    Jun 13, 2010 at 8:30 pm
  • I've successfully got hadoop installed and running: Server1 (172.28.1.138) - master, namenode, jobtracker, tasktracker Server2 (172.28.1.139) - slave, datanode Server3 (172.28.2.136) - slave, ...
    Anthony IkedaAnthony Ikeda
    Jun 3, 2010 at 12:38 am
    Jun 3, 2010 at 11:24 pm
  • Classification: UNCLASSIFIED Caveats: NONE Our HBase contains people names for RowIDs, and we need our application to be able to try other types of string matching to find rows other than than the ...
    Schlesiger, Chris (Civ, ARL/CISD)Schlesiger, Chris (Civ, ARL/CISD)
    Jun 11, 2010 at 5:13 pm
    Jun 16, 2010 at 5:39 pm
  • Hi guys, I'm getting a java.lang.UnsupportedClassVersionError while trying to start HBase, even if my JAVA_HOME actually refers to JDK 1.6.0_17. My operating system is MacOSX 10.5.8. Are there any ...
    Sergio BossaSergio Bossa
    Jun 10, 2010 at 3:03 pm
    Jun 11, 2010 at 3:44 pm
  • I am thinking of the following problem lately. I started thinking of this problem in the following context. I have a predefined budget and I can either -- A) purchase 8 more powerful servers (4cpu x ...
    Sean BigdatafunSean Bigdatafun
    Jun 3, 2010 at 6:13 am
    Jun 10, 2010 at 9:11 pm
  • I have about 2.8M rows in my HBase table with multiple versions ( max 6) . When I try to lookup 1000 records, it takes a total time of 20 minutes ! Per read takes about a second or more. Will ...
    Sharma, AvaniSharma, Avani
    Jun 29, 2010 at 7:12 pm
    Jul 1, 2010 at 7:21 pm
  • Something confused me for a long time. 1、how to recover hbase master? 2、how to recover hbase region server? as hadoop ,there is checkpoint mirror to recover the hadoop master. and now i only know to ...
    梁景明梁景明
    Jun 17, 2010 at 12:02 pm
    Jun 24, 2010 at 4:35 pm
  • I am importing data into Hbase with a client running 10 threads. I explicitly call 'flushCommit' from each thread (after a few thousand puts) Here is the thread-dump: "pool-1-thread-20" prio=10 ...
    Sujee ManiyamSujee Maniyam
    Jun 10, 2010 at 9:27 pm
    Jun 18, 2010 at 12:16 am
  • Hi all, Can the following type of value filter be possible -- Within a row, irrespective of the columns (qualifiers), the presence of a value should be checked. If that value is present then the row ...
    Raghava MutharajuRaghava Mutharaju
    Jun 1, 2010 at 8:47 am
    Jun 1, 2010 at 6:10 pm
  • Hi, I am new to HBase and have just worked on it for few days. I have two questions. Any kind of help is fully appreciated and many thanks in advance. 1) Suppose I have a columnFamily with unknown ...
    SyedShoaibSyedShoaib
    Jun 24, 2010 at 12:26 pm
    Jun 25, 2010 at 7:34 pm
  • Hi All, Is there a trick to running a single, standalone hbase on a single ec2 instance? I have hbase running locally as standalone and again on a separate testing machine in the office and my java ...
    Oliver MeynOliver Meyn
    Jun 18, 2010 at 5:41 pm
    Jun 22, 2010 at 12:43 pm
  • Is there any querying value in separating out values tied to each other vs. keeping them in a serialized object? I am guessing the second option would be much faster considering it is one composite ...
    N KapshooN Kapshoo
    Jun 21, 2010 at 8:34 pm
    Jun 22, 2010 at 3:51 am
  • I have a 'long' number that I get by using HTable.'incrementColumnValue'. This long is used as the qualifier id on a columnFamily. Now I need to add a prefix 'status' so that I can store another ...
    N KapshooN Kapshoo
    Jun 21, 2010 at 4:59 pm
    Jun 21, 2010 at 7:04 pm
  • Hello all, In the data, I have to check for multiple conditions and then work with the data that satisfies all the conditions. I am doing this as an MR job with no reduce and the conditions are ...
    Raghava MutharajuRaghava Mutharaju
    Jun 22, 2010 at 7:50 am
    Jun 23, 2010 at 6:47 pm
  • Hi all, We are experiencing a lot of "java.net.BindException: Cannot assign requested address", which is a case of https://issues.apache.org/jira/browse/hbase-2492. At some point, all grinds to a ...
    Friso van VollenhovenFriso van Vollenhoven
    Jun 11, 2010 at 9:55 am
    Jun 15, 2010 at 8:51 pm
  • I tried dumping my own Hfiles (similar to HFileOutputFormat: open an Hfile.writer, append the key value pairs and then close the writer) and tried loading them using the ruby script.. I had altered ...
    Vidhyashankar VenkataramanVidhyashankar Venkataraman
    Jun 14, 2010 at 6:08 pm
    Jun 14, 2010 at 8:20 pm
  • Hi, I am trying design schema for some data to be moved from HDFS into HBase for real-time access. Questions - 1. Is the use of new API for bulk upload recommended over old API? If yes, is the new ...
    Sharma, AvaniSharma, Avani
    Jun 16, 2010 at 1:13 am
    Jun 18, 2010 at 12:30 am
  • The last couple of days I have been running into some bottleneck issues with writing HFiles that I am unable to figure out. I am using the Hfile.writer to prepare a bunch of Hfiles (using ...
    Vidhyashankar VenkataramanVidhyashankar Venkataraman
    Jun 11, 2010 at 9:57 pm
    Jun 11, 2010 at 11:59 pm
  • Hi all, I am using HBase API to insert data into a table on a cluster. I am getting the following exception (full stack trace in pastebin, link given below). [java] 10/06/08 05:02:15 WARN ...
    Raghava MutharajuRaghava Mutharaju
    Jun 8, 2010 at 11:39 pm
    Jun 9, 2010 at 3:54 am
  • Hi all, On my single node installation of HBase, tables disappear (list command on shell returns 0 rows) after I restart the node. This has happened to me twice. Although the data is only test data, ...
    Raghava MutharajuRaghava Mutharaju
    Jun 6, 2010 at 9:48 pm
    Jun 7, 2010 at 4:47 am
  • Please don't email the 'issues' list. http://wiki.apache.org/hadoop/Hbase/Troubleshooting#A6 2010/6/14 chen peng <chenpeng0122@hotmail.com :
    Ryan RawsonRyan Rawson
    Jun 14, 2010 at 7:02 pm
    Jan 18, 2011 at 8:52 pm
  • Hey, I've been thinking about how we do out configuration and code updates for Hadoop and HBase and was wondering what others do and what is the best practice to avoid errors with HBase. Currently we ...
    Dan HarveyDan Harvey
    Jun 29, 2010 at 1:45 pm
    Jul 5, 2010 at 5:34 pm
  • Currently it's possible to specify filters on a Scan object. Is there a way to specify them in configuration instead? So that they aren't hardcoded? Generic Hbase tools (extending TableMapper) could ...
    FerdyFerdy
    Jun 28, 2010 at 9:29 am
    Jun 30, 2010 at 4:31 pm
  • Hi there, I would like to get a few words about HBase's pros and cons that may probably help my boss to make decision of adopting HBase as production. Pros : High volumn data random access Scale-out ...
    Y_823910Y_823910
    Jun 22, 2010 at 3:03 am
    Jun 24, 2010 at 5:52 am
  • Ok, I didn't set this cloud up, one of my admins did based on the work I did for the other clouds. When we start up hbase, it looks ok. When I enter hbase shell, I get the shell prompt and when I ...
    Michael SegelMichael Segel
    Jun 1, 2010 at 6:14 pm
    Jun 1, 2010 at 8:04 pm
  • Hi everyone, i am new to nosql databases and especially column-oriented Databases like hbase. I am a student on information-systems and i evaluate a fitting no-sql database for a web analytics ...
    Johannes WeissenselJohannes Weissensel
    Jun 14, 2010 at 6:12 pm
    Aug 19, 2010 at 4:38 pm
  • Does HBase have any GEO GIS support in being able to calculate and conditional on distance for the long/lat condition entered? If not has anyone done this with HBase even if not built in somewhere? ...
    Joe SteinJoe Stein
    Jun 26, 2010 at 1:36 pm
    Jul 6, 2010 at 5:29 am
  • Hello All, I am very new to Hbase world and had the following questions in mind. Could anyone take some time to answer them when one has some free time? 1) Is HBase meant for real time access through ...
    Ravikumar MAVRavikumar MAV
    Jun 18, 2010 at 9:50 pm
    Jun 29, 2010 at 1:33 pm
  • Hi, I upgraded a 3 node (1 master and 2 RS) cluster to 0.20.5 this morning. hadoop version is Cloudera 0.20.2+228 I saw the following in hbase-hadoop-regionserver-sjc9-flash-grid05.ciq.com.log ...
    Ted YuTed Yu
    Jun 25, 2010 at 6:14 pm
    Jun 25, 2010 at 9:53 pm
  • Hi, I am running a job to write some data from a HDFS file to and Hbase table using the new API. The job runs fine without any errors, but I do not see the rows added to the hbase table. This is what ...
    Sharma, AvaniSharma, Avani
    Jun 17, 2010 at 1:13 pm
    Jun 23, 2010 at 10:56 pm
  • Hey all, I am not sure whether this is feasible or not . How about having a "Distributed Cache" for Hbase table, where we can just specify the table name (or a subset of it's columns) and it gets ...
    John smithJohn smith
    Jun 22, 2010 at 2:06 am
    Jun 22, 2010 at 3:43 pm
  • Hi Everyone, I've been trying to track down a problem I'm having with sorting IBWs with it comparator, and it seems as though the comparator doesn't work as expected. The problem seems to be that ...
    Chase BradfordChase Bradford
    Jun 17, 2010 at 1:20 pm
    Jun 17, 2010 at 1:44 pm
  • Hello all, I am running an MR job and HBase is the data sink. If a task attempt is assigned to node3 in the cluster, it fails. Since it failed, it would get reassigned to some other node in the ...
    Raghava MutharajuRaghava Mutharaju
    Jun 9, 2010 at 10:09 am
    Jun 10, 2010 at 7:57 pm
  • Hi you all, first of all, thanks for a great project to base our work on, and we hope to find more time to help and make it better. Yesterday, we announced Lily at Berlin Buzzwords, which is still ...
    Steven NoelsSteven Noels
    Jun 8, 2010 at 9:07 am
    Jun 9, 2010 at 2:17 am
  • Hi all, If HBase is used as the data sink in an MR job, would there be a performance improvement if a) is done instead of b) a) all the Puts are collected in Reduce or Map (if there is no reduce) and ...
    Raghava MutharajuRaghava Mutharaju
    Jun 5, 2010 at 10:45 pm
    Jun 6, 2010 at 4:52 pm
  • I'm in the process of configuring our machines for a HBase deployment. Based upon the documentation I've read so far, a ZooKeeper Quorum is required with Hadoop running (of course). However, to what ...
    Anthony IkedaAnthony Ikeda
    Jun 1, 2010 at 2:49 am
    Jun 1, 2010 at 6:18 am
  • Hi all, I am playing with Hbase 0.20.5 with Stargate. When data is stored into hbase via hbase shell, the data retrieval via Stargate rest api seems strange. This is what it looks like in hbase ...
    Eric YangEric Yang
    Jun 30, 2010 at 5:30 am
    Jul 1, 2010 at 2:39 am
  • hi: when I exit my problem,fllowing message will be print: Closing session: 0x229689222080036 Closing ClientCnxn for session: 0x229689222080036 Exception while closing send thread for session ...
    Zhengbing liZhengbing li
    Jun 26, 2010 at 3:06 am
    Jun 28, 2010 at 2:31 am
  • I have a 'long' number that I get by using HTable.'incrementColumnValue'. This long is used as the qualifier id on a columnFamily. However in my listings, I always want the latest number first ...
    N KapshooN Kapshoo
    Jun 25, 2010 at 5:42 pm
    Jun 25, 2010 at 9:04 pm
  • If I want to store say a 1000 users associated with a doc using versioning, do I have to do thousands of Put operations? p3.add(FAMILY, Bytes.toBytes(USER), Bytes.toBytes(id)); Thanks.
    N KapshooN Kapshoo
    Jun 22, 2010 at 7:42 pm
    Jun 22, 2010 at 7:52 pm
  • How can I find out how many versions a row has on hbase shell and also see that data ? Also, can someone point me to any documentation on working with versions via the API. Thanks, Avani
    Sharma, AvaniSharma, Avani
    Jun 19, 2010 at 12:39 am
    Jun 22, 2010 at 3:34 am
  • Currently, in our production cluster, almost all of the traffic for a day ends up assigned to a single RS and that causes the load on that machine to be too high. With our last release, we salted our ...
    Daniel EinspanjerDaniel Einspanjer
    Jun 17, 2010 at 3:43 pm
    Jun 17, 2010 at 4:15 pm
  • I was just looking around the list serv and google, and didn't really find anything great, so I figure I'd just put it out there. Are there an ORM options out there for HBase? If not does the group ...
    Ananth SarathyAnanth Sarathy
    Jun 10, 2010 at 7:36 pm
    Jun 11, 2010 at 6:52 pm
  • Hi, I stumbled upon this link http://wiki.apache.org/hadoop/Hbase/Troubleshooting#A18 that recommends Hbase users to downgrade the JVM from 1.6.0_18 to 1.6.0_16. What about JVM version 1.6.0_20? Is ...
    Lucas Nazário dos SantosLucas Nazário dos Santos
    Jun 2, 2010 at 3:11 pm
    Jun 2, 2010 at 4:39 pm
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90 users for June 2010

Stack: 48 posts Jonathan Gray: 41 posts Raghava Mutharaju: 36 posts Vidhyashankar Venkataraman: 30 posts Ryan Rawson: 27 posts Jean-Daniel Cryans: 24 posts Todd Lipcon: 21 posts Ted Yu: 16 posts Sharma, Avani: 14 posts Andrew Purtell: 13 posts N Kapshoo: 13 posts Michael Segel: 12 posts Jinsong Hu: 11 posts Anthony Ikeda: 10 posts Andrey Stepachev: 8 posts Steven Noels: 8 posts Daniel Einspanjer: 7 posts 梁景明: 7 posts Sean Bigdatafun: 6 posts Sergio Bossa: 6 posts
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