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76 discussions - 362 posts

  • Hello again. This is my last message for today I have often an exception in my HBase client. A regionserver fails to serve a region when the client get a row on the HBase cluster. ...
    Oct 17, 2008 at 8:02 am
    Nov 11, 2008 at 5:36 pm
  • hi.. i'm new to hbase.. i'm try to do restful web service that uses hbase. can anyone detail on how to connect restful web service to hbase. and i unable to find links that contain some examples of ...
    Oct 22, 2008 at 6:22 am
    Aug 26, 2011 at 5:05 am
  • Hi all, I am using 0.18.0 and have successfully used data from hbase table as input to my map/reduce job. I wonder how to specify a subset of records from a table instead of taking all records as ...
    Cedric HoCedric Ho
    Oct 8, 2008 at 7:34 am
    Dec 11, 2008 at 3:06 am
  • Hi all, Scanning works for me when I don't provide my filter. If I do I have strange behavior, see the code: HTable table = new HTable("foo"); for (Object row : table.getScanner(Bytes ...
    Oct 11, 2008 at 6:23 am
    Oct 16, 2008 at 4:31 am
  • Hi All. Our environment - 8 Datanodes (1 is also Namenode), 7 from them is also region servers and 1 is Master, default replication - 3. We have application that heavy writes with relative small rows ...
    Slava GorelikSlava Gorelik
    Oct 2, 2008 at 6:30 pm
    Oct 10, 2008 at 2:43 pm
  • Hi, All As I understand, HConnectionManager class pools table server connections (HBASE_INSTANCES) but does not pool connections to the master server. Is it correct? I guess it is implemented this ...
    Michael DagaevMichael Dagaev
    Oct 22, 2008 at 10:27 am
    Oct 28, 2008 at 2:57 pm
  • Hi hbase-users, During a fairly large MR process, on the Reduce cycle as its writing its results to a table, I see org.apache.hadoop.hbase.NotServingRegionException in the region server log several ...
    Dru JensenDru Jensen
    Oct 23, 2008 at 6:12 pm
    Oct 24, 2008 at 4:50 pm
  • Hi. The default results returned by getRow/Scanner/else is ordered by the key. Is it possible to set other sort method such as timestamp? Thanks for the help. Best regards. sishen
    Dingding YeDingding Ye
    Oct 18, 2008 at 3:29 pm
    Sep 10, 2009 at 10:09 pm
  • Hi All, 1). We are doing performance testing on hbase. The environment of the testing is 3 data nodes, and 1 name node distributed on 4 machines. We started one region server on each data node ...
    Rui XingRui Xing
    Oct 7, 2008 at 9:42 am
    Oct 13, 2008 at 2:49 pm
  • Hi. I'm looking for HBase metrics functionality, i need to display the metrics, about number of transactions, average transaction time and other. Does Hbase provides something like this ? Best ...
    Slava GorelikSlava Gorelik
    Oct 29, 2008 at 2:56 pm
    Oct 30, 2008 at 2:42 pm
  • Hi Using Hbase with 2 Region servers on similar machines , I see that one machine is serving almost 400 requests per second , while the other one is serving 0-10 . This cause extreme overload on the ...
    Yossi IttachYossi Ittach
    Oct 23, 2008 at 12:09 pm
    Oct 26, 2008 at 9:42 am
  • Hi all, Maybe it might be interesting for you, well to be honest I hope so :) We are using HBase as the core technology in our project. Any feedback is more than welcome, thanks! -- SubRecord - ...
    Oct 6, 2008 at 7:27 pm
    Oct 9, 2008 at 4:19 pm
  • I'm seeing a strange effect on my hbase instance. Sometimes, on requesting the full history of a column, I get back individual cells several times over. That is, I'm getting results like this: ...
    Toby WhiteToby White
    Oct 20, 2008 at 3:12 pm
    Feb 25, 2009 at 7:08 pm
  • hi I've run the perormance evaluation test on a two machine cluster hardware: dual Xeon E5430 2.66 Ghz, 4GB RAM, software: OS - 64bit Ubuntu 8.04 Server Java 1.6 - 64bit Hadoop - 0.18.1 HBase - ...
    Krzysztof SzlapinskiKrzysztof Szlapinski
    Oct 28, 2008 at 8:46 pm
    Oct 28, 2008 at 10:22 pm
  • Is there some numbers I can figure on per GB of heap that I can get in to a regionserver? say something like this: (x bytes avg per rowkey * max rows) / index interval = y GB Heap Billy
    Billy PearsonBilly Pearson
    Oct 27, 2008 at 6:26 am
    Oct 27, 2008 at 7:52 pm
  • Hi! I'm trying to figure out how to get all the columns in a Map-Reduce job without having to specify them all? Found the line: @see org.apache.hadoop.hbase.regionserver.HAbstractScanner for column ...
    Erik HolstadErik Holstad
    Oct 18, 2008 at 1:39 am
    Oct 20, 2008 at 11:11 pm
  • I would like to delete old versions from a table on a daily basis and am thinking to implement: 1) Run a map/reduce (similar to RowCounter) and for each rowid, execute a deleteall(rowed, timestamp) ...
    Yair Even-ZoharYair Even-Zohar
    Oct 15, 2008 at 3:25 pm
    Oct 15, 2008 at 5:37 pm
  • Hi All As I understand, the HTable class uses HConnectionManager class, which holds connections to the master and region servers. The connections are pooled as entries in a thread-safe static table ...
    Michael DagaevMichael Dagaev
    Oct 13, 2008 at 9:55 am
    Oct 13, 2008 at 7:27 pm
  • Hi, I looked at the source codes implemented to support Multi-region transaction feature. (HBASE-669) It uses optimistic concurrency control. Did any guys consider other CC like timestamp-based CC or ...
    Jaeyun NohJaeyun Noh
    Oct 6, 2008 at 6:21 pm
    Oct 13, 2008 at 2:49 pm
  • Hi, Do we have a schedule for tomorrow's user meeting? Thanks, Hui
    Ding, HuiDing, Hui
    Oct 20, 2008 at 5:30 pm
    Oct 21, 2008 at 7:32 pm
  • A few of us over on IRC have been chatting and reckon its about time for another hbase meetup. Who would be interested in an hbase meetup on October 21st? Rapleaf are having a hadoop meetup that ...
    Oct 10, 2008 at 6:43 pm
    Oct 14, 2008 at 6:35 pm
  • Hello List Does anyone have a workin Jython code that interacts with HBase? ROL mailto:[email protected]
    Oct 7, 2008 at 2:02 pm
    Oct 9, 2008 at 5:41 am
  • Hi all, I'd like to remind everyone that the Hadoop Camp & ApacheCon US is coming up in New Orleans next month. http://tinyurl.com/hadoop-camp It will be the largest gathering of Hadoop developers ...
    Owen O'MalleyOwen O'Malley
    Oct 2, 2008 at 4:08 pm
    Nov 18, 2008 at 11:00 pm
  • Hi. I am trying to install Hbase on debian testing. I installed hadoop 0.18.1 sucessfully using these instructions: http://wiki.apache.org/hadoop/Running_Hadoop_On_Ubuntu_Linux_(Single-Node_Cluster) ...
    Antonis labadaridisAntonis labadaridis
    Oct 31, 2008 at 10:12 pm
    Oct 31, 2008 at 10:52 pm
  • Hi all, I have a question on transaction model implemented in HBase (TransactionalRegion, which extends HRegion). During the commit phase, HBase transaction checks conflicts between read and write ...
    Jaeyun NohJaeyun Noh
    Oct 27, 2008 at 5:35 am
    Oct 27, 2008 at 7:41 pm
  • Hi, I am wondering how to add more regionservers while the instance is up? Couldn't find sufficient information to guide me on this issue. Thanks! Hui
    Ding, HuiDing, Hui
    Oct 20, 2008 at 9:15 pm
    Oct 25, 2008 at 6:25 am
  • hbase 0.18.1 release candidate 2 is available for download: http://people.apache.org/~stack/hbase-0.18.1-candidate-2/ It fixes 15 issues: http://tinyurl.com/49fuha (HBASE-946 is the difference ...
    Oct 22, 2008 at 8:21 pm
    Oct 25, 2008 at 1:24 am
  • Hadoop Version : hadoop-0.18.0 HBase Version : hbase-0.18.0 I am doing a fresh start of hadoop and hbase. Hadoop starts properly but when I try to start hbase it quits with the below given exception. ...
    Oct 18, 2008 at 12:43 pm
    Oct 20, 2008 at 1:11 pm
  • Hi all, I performed a cluster rebalance on my test cluster yesterday (5 regionserver / datanodes each with approx 400GB - total approx 2TB HDFS) and I would like to know if the mailing lists have ...
    Daniel PloegDaniel Ploeg
    Oct 15, 2008 at 9:48 pm
    Oct 16, 2008 at 11:12 pm
  • Hi. There are many cells which shares the same column family in a row. I want to do the pagination, is it possible? Can i add the limit and offset options? I have used the scanner but it paginated ...
    Dingding YeDingding Ye
    Oct 14, 2008 at 4:37 pm
    Oct 15, 2008 at 6:14 pm
  • I just wanted to take this opportunity to report an HBase success story. We are running Hadoop 0.18.1 and HBase 0.18.0. Our application is a web crawling application with concurrent batch content ...
    Andrew PurtellAndrew Purtell
    Oct 2, 2008 at 11:11 pm
    Oct 3, 2008 at 12:28 am
  • Hi all, Our environment is 4 machines ( 1 is also slave). They are all region servers. First I write 1000 item data to the hbase. Then I reading data according to writing sequence. And then I check ...
    Cai SijieCai Sijie
    Oct 28, 2008 at 3:07 pm
    Nov 4, 2008 at 7:58 am
  • Just want to make sure my understanding of the log is correct: each regionserver has one log for all the regions it is serving. this log is the write-ahead log that is stored on hadoop dfs and always ...
    Ski Gh3Ski Gh3
    Oct 20, 2008 at 9:50 pm
    Oct 21, 2008 at 6:14 pm
  • hbase 0.18.1 release candidate 1 is available for download: http://people.apache.org/~stack/hbase-0.18.1-candidate-1/ It fixes 14 issues: http://tinyurl.com/49fuha Shall we release this RC as hbase ...
    Oct 16, 2008 at 9:13 pm
    Oct 17, 2008 at 9:32 pm
  • Hello List, We encountered an out-of-memory error in data loading. We have 5 data nodes and 1 name node distributed on 6 machines. Block-level compression was used. Following is the log output. Seems ...
    Rui XingRui Xing
    Oct 16, 2008 at 12:18 pm
    Oct 17, 2008 at 3:41 am
  • Hello List 1) There are broken links: http://wiki.apache.org/hadoop/Hbase/MapReduce - ...
    Oct 15, 2008 at 5:37 am
    Oct 15, 2008 at 5:59 pm
  • Hi, All Let two concurrent clients update values of different qualifiers of the same column family of the same row. I guess that both qualifiers will be updated properly. Is it correct? Thank you for ...
    Michael DagaevMichael Dagaev
    Oct 28, 2008 at 5:08 pm
    Oct 30, 2008 at 3:09 pm
  • Hi, All As I understand, Hbase depends on log4j 1.2.15. Unfortunately, this version of log4j contains jmx and jms dependencies. Can I use Hbase with log4j 1.2.14 instead of log4j 1.2.15 ? Thank you ...
    Michael DagaevMichael Dagaev
    Oct 28, 2008 at 5:02 pm
    Oct 28, 2008 at 5:09 pm
  • Hi all I Have Hbase with 1 RegionServer , Hadoop with 1 DataNode (on diffrent machines). The Hbase contains ~ 3M rows. It takes approxametly 0.3 sec to reply to a get request (from the moment it's ...
    Yossi IttachYossi Ittach
    Oct 28, 2008 at 8:48 am
    Oct 28, 2008 at 11:50 am
  • Hi All I've been benchmarking HBase for quite sometime now , and it keeps crushing under high load. The benchmark scheme is running on a dedicated host (320GB disk , 4 GB ram , 2 dualcore processors) ...
    Yossi IttachYossi Ittach
    Oct 27, 2008 at 8:33 am
    Oct 27, 2008 at 3:55 pm
  • Hi all I'm using HBase 0.18 and Hadoop 0.18.1 and I'm running some benchmarks. Every now and then , a RegionServer prints this error msg :""unable to report to master for X ms - aborting server" and ...
    Yossi IttachYossi Ittach
    Oct 22, 2008 at 3:02 pm
    Oct 22, 2008 at 6:16 pm
  • Hi all, This RDF proposal is a good long time ago. Now we'd like to settle down to research again. I attached our proposal, We'd love to hear your feedback & stories!! Thanks. -- Best regards, Edward ...
    Edward J. YoonEdward J. Yoon
    Oct 21, 2008 at 1:03 am
    Oct 22, 2008 at 5:36 am
  • I am running jobs and I am noticing that the % done on the reduce jobs is hitting 100% way before the job is done writing to the table I run a map and reduce and use ...
    Billy PearsonBilly Pearson
    Oct 8, 2008 at 9:13 pm
    Oct 18, 2008 at 6:45 am
  • Hello. I have some questions for the hbase-users (and developers) team. I'll post them in different threads since it concerns different subjects I read the jira issue tracker content, and I have a ...
    Oct 16, 2008 at 1:26 pm
    Oct 17, 2008 at 10:10 am
  • My Hbase installation was working fine. I dont know what happened may be i changed something but now the meta region is not assigned to any region server. Earlier I was getting prints in the log ...
    Oct 16, 2008 at 2:37 pm
    Oct 17, 2008 at 3:46 am
  • Sorry if this was already answered. How do you specify a split size for a table? Can this be done in hbase shell with the create command? I saw hbase-42 which Andrew Purtell worked on and released in ...
    Dru JensenDru Jensen
    Oct 14, 2008 at 6:36 pm
    Oct 15, 2008 at 2:01 am
  • Greetings to everyone Is there any good book for hbase? i am a new user and i would like to find the proper education material thanks in advance Alexandros
    Oct 9, 2008 at 12:38 pm
    Oct 9, 2008 at 2:24 pm
  • Hi, Will HBase work reasonably for small data sets ? E.g. for 10s or 100s of Gigas of data? Would it make sense to use HBase to store and access them ? I was thinking HDFS and M/R have a overhead ...
    Naama KrausNaama Kraus
    Oct 6, 2008 at 8:49 am
    Oct 9, 2008 at 1:22 am
  • We are happy to announce that we've been cleared to contribute patches again. Looking forward to getting back to writing code. Yours, Jim and Stack. --- Jim Kellerman, Powerset (Live Search, ...
    Jim Kellerman (POWERSET)Jim Kellerman (POWERSET)
    Oct 8, 2008 at 10:53 pm
    Oct 9, 2008 at 12:20 am
  • Currently the only way to access HBase from C++ is via the thrift or REST interfaces. There are no plans to add direct access to HBase from C++. However, if you'd like to build one, contributions are ...
    Jim Kellerman (POWERSET)Jim Kellerman (POWERSET)
    Oct 4, 2008 at 11:31 pm
    Oct 6, 2008 at 6:07 pm
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60 users for October 2008

Stack: 75 posts Slava Gorelik: 29 posts Jean-Daniel Cryans: 28 posts Jim Kellerman (POWERSET): 25 posts Yossi Ittach: 12 posts Andrew Purtell: 10 posts Jonathan Gray: 10 posts Michael Dagaev: 10 posts Billy Pearson: 9 posts Jean-Adrien: 9 posts Przemek: 9 posts Dingding Ye: 8 posts Dru Jensen: 8 posts Clint Morgan: 7 posts Ding, Hui: 7 posts Jaeyun Noh: 7 posts Qian, Ling: 7 posts Erik Holstad: 6 posts Rathi: 6 posts Krzysztof Szlapinski: 5 posts
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