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94 discussions - 493 posts

  • As some of you know, I've been playing with HBase on/off for the past few months. I'd like your take on some cluster setup/configuration setting that you’ve found successful. Also, any other thoughts ...
    Aug 11, 2009 at 4:43 pm
    Aug 24, 2009 at 5:14 pm
  • We have just done a Performance Evaluation on HBase-0.20.0. Refers to: http://docloud.blogspot.com/2009/08/hbase-0200-performance-evaluation.html
    Schubert ZhangSchubert Zhang
    Aug 17, 2009 at 9:03 pm
    Aug 24, 2009 at 4:43 pm
  • The second hbase 0.20.0 release candidate is available for download: http://people.apache.org/~stack/hbase-0.20.0-candidate-2/ Near to 450 issues have been addressed since the 0.19 branch. Release ...
    Aug 18, 2009 at 5:53 am
    Aug 25, 2009 at 4:50 am
  • Hi all , I have gone through the IndexedTableAdmin classes in Hbase 0.19.3 API .. I have seen some methods used to create an Indexed Table (on some column).. I have some doubts regarding the same ... ...
    Bharath vissapragadaBharath vissapragada
    Aug 17, 2009 at 2:09 pm
    Aug 18, 2009 at 4:42 pm
  • In this keynote address here at VLDB 2009 (http://vldb2009.org/?q=node/22) Raghu Ramakrishnan, Yahoo! Research's Chief Scientist, made prominent mention of HBase, much to my surprise (and later ...
    Andrew PurtellAndrew Purtell
    Aug 25, 2009 at 10:17 am
    Aug 26, 2009 at 6:08 pm
  • Hello, Is it possible to run a Map\Reduce job for only one row in table? Thus skipping the unnecessary cycling through other rows by ignoring them manually or via "skip mode". The idea behind it is ...
    Alex SpodinetsAlex Spodinets
    Aug 11, 2009 at 2:41 pm
    Aug 13, 2009 at 3:54 am
  • Hi there, It worked well while I fired 5 threads to fetch data from HBASE,but it failed after I incresed to 6 threads. Although it showed some WARN, the thread job can't be done! My hbase is the ...
    Aug 21, 2009 at 2:13 am
    Aug 25, 2009 at 10:21 am
  • Hi all, I am a beginner to HBase. I have some question with Hbase after setup Hbase and Hadoop. The first, After setup Hbase and create a new database, I don't know where is location of HBase's ...
    Nguyen Thi Ngoc HuongNguyen Thi Ngoc Huong
    Aug 21, 2009 at 2:32 am
    Aug 25, 2009 at 6:13 am
  • Hi, I'm using hbase 0.19.3 on a cluster with 30 machines to store web data. We got a poweroff days before and I found much web data lost. I have searched google, and find it's a meta flush problem. I ...
    Chen XinliChen Xinli
    Aug 6, 2009 at 4:45 am
    Aug 19, 2009 at 2:50 pm
  • Hello, Could somone kindly point me to an example of HBase 0.20 API usage. All i was able to find so far is a Map\Reduce example in the 0.20 SVN source. Would be also good to have some info on how ...
    Alex SpodinetsAlex Spodinets
    Aug 17, 2009 at 10:57 pm
    Aug 26, 2009 at 6:51 pm
  • is there anyone with experience in hbase 0.20 realtime application, preferably in production environment? in thinking in throw away all my legacy knowledge about what i think about systems.. cause i ...
    Fabio KaminskiFabio Kaminski
    Aug 11, 2009 at 5:29 pm
    Aug 12, 2009 at 2:31 pm
  • Hi, It seems over the years I tried various settings in both Hadoop and HBase and when redoing a cluster it is always a question if we should keep that setting or not - since the issue it ...
    Lars GeorgeLars George
    Aug 26, 2009 at 2:40 pm
    Aug 27, 2009 at 7:33 pm
  • Hi all , I have one small doubt . Kindly answer it even if it sounds silly. Iam using Map Reduce in HBase in distributed mode . I have a table which spans across 5 region servers . I am using ...
    John smithJohn smith
    Aug 20, 2009 at 4:42 pm
    Aug 21, 2009 at 8:33 am
  • Hi, I'm a relative newcomer to both HBase and Hadoop so please bear with me if some of my queries don't make sense. I'm managing a small HBase cluster (1 dedicated master, 4 regionservers) and am ...
    Stephen mulcahyStephen mulcahy
    Aug 18, 2009 at 10:26 am
    Aug 20, 2009 at 10:05 am
  • Hello Everyone, We are testing hbase0.20.0 rc in a cluster with 5 nodes, inserting web pages at a speed of 20 pages per second. A few minutes later one region server shut down, and about 40 minutes ...
    Zheng LvZheng Lv
    Aug 4, 2009 at 8:24 am
    Aug 15, 2009 at 10:33 am
  • Hi, I have just installed Hadoop 19.3 (pseudo distributed mode) and Hbase 19.2 by following the instructions. Both of them starts fine. Hadoop Log: $ bin/start-all.sh starting namenode, logging to ...
    Onur AKTASOnur AKTAS
    Aug 3, 2009 at 2:14 am
    Aug 3, 2009 at 7:32 pm
  • Hi all, I was trying to set up an hbase-0.20 rc2 instance in a pseudo dist mode, but the zookeeper instance won't start. after executing the start-hbase.sh script I got: : no address associated with ...
    Ski Gh3Ski Gh3
    Aug 31, 2009 at 5:32 pm
    Aug 31, 2009 at 6:54 pm
  • Hi All, I'm going to be in the San Fran area the 6,7,8 September and would love the chance to meet with some of the HBase users, developers if anyone is interested? I work with a Global Biodiversity ...
    Tim robertsonTim robertson
    Aug 14, 2009 at 4:46 pm
    Sep 7, 2009 at 8:47 pm
  • Hi, The Hbase/Jython ( http://wiki.apache.org/hadoop/Hbase/Jython ) wiki page is outdated. I want to edit it but the page is marked as immutable. I have attached a working sample and a patched ...
    Andrei SavuAndrei Savu
    Aug 25, 2009 at 11:02 am
    Aug 27, 2009 at 6:50 pm
  • Hey there, I'm sending out this summary of how I diagnosed what was wrong with my cluster in hopes that you can glean some knowledge/suggestions from it :) Thanks for the diagnostic footwork. A few ...
    Bradford StephensBradford Stephens
    Aug 20, 2009 at 10:48 pm
    Aug 26, 2009 at 2:57 am
  • Hi, I wanted to use RowCounter to count the rows of my Hbase Table, so i wrote a small java class which would display the number of rows in my hbase table. Assuming my Hbase table is TestTable with ...
    Rakhi KhatwaniRakhi Khatwani
    Aug 13, 2009 at 1:54 pm
    Aug 18, 2009 at 5:43 pm
  • Hi, if a know a cell in a hbase for its column:<qualifer :value, i need to know which row key it belongs to. I searched the HBase api several times, but i can not find the right method to solve my ...
    Lei wangLei wang
    Aug 17, 2009 at 6:51 am
    Aug 18, 2009 at 2:12 am
  • Hi all, I am a newbie to HBase, when I run the HBase Java Example on the get started. I meet some errors : ...
    Zhang jianfengZhang jianfeng
    Aug 13, 2009 at 8:18 am
    Aug 15, 2009 at 4:10 pm
  • Hi,i want to konw whether hbase can store picture and video as blob field? Maybe I should store the picture path in it ,and point to the pic or video in file system? but how to store the pic and ...
    Aug 10, 2009 at 4:11 pm
    Aug 11, 2009 at 2:32 pm
  • Hi, I am new to HBase, so please forgive if this question is too basic. We are building a system that stores time series data for different terms in column qualifiers. So, we plan to store data in ...
    Nikhil GuptaNikhil Gupta
    Aug 28, 2009 at 8:59 pm
    Sep 2, 2009 at 10:59 pm
  • Hello, Thank you for your suggestions. Several days before We found our routing talbe has some problems, after adjusting now we are sure that the bandwidth is ok. And we have used lzo compression. So ...
    Zheng LvZheng Lv
    Aug 16, 2009 at 9:49 am
    Aug 26, 2009 at 1:06 am
  • Hey, I'm trying to move a relational model to HBase, and would like some input. Suppose i have constant stream of documents coming in, and I'd like to parse these by a single word. It makes sense to ...
    Aug 24, 2009 at 5:37 pm
    Aug 24, 2009 at 8:41 pm
  • Hallo guys, I am using hadoop-0.19.1 and hbase-0.19.3 on a cluster of four nodes. I have created an hbase database composed of one FamilyColumn 'cf' and several columns ''cf:Value cf:SensorType ...
    Xine JarXine Jar
    Aug 11, 2009 at 4:44 pm
    Aug 17, 2009 at 2:53 pm
  • Hi, I'm migrating from HBase 0.19 to version 0.20 and facing an error regarding the TableInputFormat class. Bellow is how I'm setting up the job and also the error message I'm getting. Does anybody ...
    Lucas Nazário dos SantosLucas Nazário dos Santos
    Aug 3, 2009 at 9:30 pm
    Aug 9, 2009 at 1:44 am
  • Hi: I just installed a Hbase 0.19.3. 'Hbase shell' works fine after the installation, and I managed to create a table, and input a few rows through the shell. However, when I tried to run my java ...
    Charles duCharles du
    Aug 31, 2009 at 10:09 pm
    Sep 1, 2009 at 12:35 am
  • Hello, I am trying to run a Mapreduce job using Hbase as a source. X,Y are region servers, X is master and Zookeeper. Y is the only tasktracker., both have 16Gb ram. I have kept the hbase-dev.20 and ...
    Saptarshi GuhaSaptarshi Guha
    Aug 26, 2009 at 1:12 am
    Aug 26, 2009 at 1:49 am
  • Hi, I have a very small table under HBase that I use to store control data of my program. If HBase crashes and I have to kill it, the table goes away. However, I can still see the table inside HDFS. ...
    Lucas Nazário dos SantosLucas Nazário dos Santos
    Aug 23, 2009 at 2:57 am
    Aug 23, 2009 at 2:55 pm
  • Hello I am working on a model in which I have to manage question and their answers. I create two columns, one in which question is to be store and other its answer. Now people will ask question, so ...
    Puri, AseemPuri, Aseem
    Aug 18, 2009 at 11:37 am
    Aug 20, 2009 at 2:42 am
  • I'm seeing a nice variety of Exceptions from HBase and could use some pointers about what to do next. This is a new map/reduce program, updating about 550k rows with around a dozen columns on a very ...
    Marc LimotteMarc Limotte
    Aug 17, 2009 at 7:20 pm
    Aug 18, 2009 at 8:16 pm
  • When set autoflush=false, the client-side write buffer is fine to work. But we may not get better performance when random inserting. Since the ...
    Schubert ZhangSchubert Zhang
    Aug 12, 2009 at 7:02 pm
    Aug 14, 2009 at 6:13 am
  • Hey folks, I have a question (possibly naive) about a scans performance. My scan is taking about 6 seconds to do the following: 470 rows extracted total size of all rows together is about 1.4 megs ...
    Kyle ObaKyle Oba
    Aug 3, 2009 at 7:02 am
    Aug 4, 2009 at 10:07 am
  • Hi All, In HBase 0.20rc, HTable does not explicitly close the connection to zookeeper in HTable::close. It probably could be better. And in my opinion, it should be for: 1. It is not well-behaved, ...
    Angus HeAngus He
    Aug 4, 2009 at 6:01 am
    Aug 4, 2009 at 8:14 am
  • I have the following problem when trying to run hbase 0.20 on ec2. First, I start katta which in turn starts zookeeper with the following properties (zookeeper.zk.properties): ...
    Yair Even-ZoharYair Even-Zohar
    Aug 2, 2009 at 6:55 pm
    Aug 2, 2009 at 8:31 pm
  • Stack's mail remind me us the hbase 0.20 candidate version, when does hbase 0.20.0 release? In the hbase 0.20.0 api overview, it mention zookeeper cluster configuration, but i am just use hadoop in ...
    Lei wangLei wang
    Aug 1, 2009 at 3:10 pm
    Aug 1, 2009 at 9:06 pm
  • I'm still a little confused by 0.20.0 releasing both a rewrite of the REST interface and giving Stargate contrib status as part of the release. This seems like having your REST *and* eating it too! ...
    Greg CottmanGreg Cottman
    Aug 18, 2009 at 8:28 am
    Aug 28, 2009 at 1:51 am
  • Hi users, This weekend at the second HBase Hackathon (held by StumbleUpon, thx!) we helped someone migrating a data loading MapReduce job from 0.19 to 0.20 because of a performance problem. It was ...
    Jean-Daniel CryansJean-Daniel Cryans
    Aug 11, 2009 at 5:41 pm
    Aug 21, 2009 at 4:17 am
  • Hi, I tried to write the large amount of data into HBase. The map processes could be completed, but while processing the reduce tasks, the job is failed. The error message is shown as follow: ...
    Aug 9, 2009 at 6:25 am
    Aug 10, 2009 at 10:36 pm
  • can anyone help me? sometime it report such error, but sometime the program goes well. Is hbase0.20 still not stable enough? ...
    Lei wangLei wang
    Aug 6, 2009 at 3:13 am
    Aug 10, 2009 at 9:03 pm
  • I am evaluating the performance of stargate (which btw, is a great contrib to hbase, thanks!). The evaluation program is mostly a simple modification to the existing PerformanceEvaluation program, ...
    Haijun CaoHaijun Cao
    Aug 3, 2009 at 9:04 pm
    Aug 4, 2009 at 4:56 pm
  • I'm confused about the when to use HBase. (Sure I have read everything and every link on http://wiki.apache.org/hadoop/Hbase/FAQ) Its distributed (when used on Hadoop) and provides efficient database ...
    Onur AKTASOnur AKTAS
    Aug 4, 2009 at 9:29 am
    Aug 4, 2009 at 4:51 pm
  • Hi all, I have hbase 0.19.3 version ... On what versions of hadoop apart frm 0.19.x can i run this hbase version ... is it 0.20.x or 0.18.x .. Thanks in advance
    Bharath vissapragadaBharath vissapragada
    Aug 3, 2009 at 11:49 am
    Aug 3, 2009 at 12:13 pm
  • http://www.hadooper.cn/hadoop/cgi-bin/moin.cgi/thirdcfp Time : Sunday, November 15, 2009 City: Beijing, China Sponsored by Yahoo!, Cloudera Organized by hadooper.cn Website: ...
    He YongqiangHe Yongqiang
    Aug 21, 2009 at 4:22 pm
    Sep 2, 2009 at 1:04 am
  • Hi: How does zookeeper fit in the big picture of hbase? Is it required for a hbase installation? I followed installation instructions here ...
    Charles duCharles du
    Aug 31, 2009 at 10:25 pm
    Aug 31, 2009 at 10:28 pm
  • Hi, The HBaseMaster is responsible for assigning regions to HRegionServers. The first region to be assigned is the ROOT region. The ROOT region is served by a region server, right? Will it be a ...
    Aug 27, 2009 at 12:45 am
    Aug 27, 2009 at 12:50 am
  • Hello, Is there a way to off turn zookeeper? I know this might not be a good idea, but I would just like to test some code that uses Hbase and don't want to deal with setting up and running Hbase ...
    Saptarshi GuhaSaptarshi Guha
    Aug 25, 2009 at 5:06 pm
    Aug 25, 2009 at 8:16 pm
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77 users for August 2009

Stack: 53 posts Jean-Daniel Cryans: 39 posts Jonathan Gray: 32 posts Schubert Zhang: 27 posts Llpind: 26 posts Andrew Purtell: 23 posts Amandeep Khurana: 19 posts Ryan Rawson: 19 posts Bharath vissapragada: 15 posts Rocks: 14 posts Bradford Stephens: 13 posts Y_823910: 11 posts Alex Spodinets: 10 posts Onur AKTAS: 10 posts Zheng Lv: 9 posts Lucas Nazário dos Santos: 8 posts Mathias De Maré: 7 posts Tim robertson: 7 posts Andrei Savu: 6 posts Chen Xinli: 6 posts
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