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50 discussions - 298 posts

  • Hello! It seems I have a serious problem with HBase. We've been using if for some time now, had some minor problems with regions unexpectedly closing once every couple of days, but this would usually ...
    Nickolai ToupikovNickolai Toupikov
    Aug 5, 2008 at 12:54 pm
    Aug 7, 2008 at 6:22 pm
  • What causes the following error? It's coming from the TableInputFormatBase class. It seems to be fairly random for me. From what I've read so far, its related to a timeout error? I verified my map ...
    Dru JensenDru Jensen
    Aug 11, 2008 at 6:34 pm
    Aug 13, 2008 at 4:58 pm
  • Please note that you will get a prompt response about HBase questions if you ask them on the HBase user list ( hbase-user@hadoop.apache.org ) Bigtable uses both. First it splits row ranges based on ...
    Jim KellermanJim Kellerman
    Aug 18, 2008 at 5:14 pm
    Aug 28, 2008 at 6:47 am
  • Hello, I'm looking for some information on hbase's architecture (out of pure interest), which i wasn't able to find anything about it on the Hbase site (including the architecture description). ...
    Leon MergenLeon Mergen
    Aug 3, 2008 at 11:22 pm
    Aug 4, 2008 at 7:13 pm
  • All, I've been trying to understand why I'm getting this error. It happens when JobClient.runJob() is invoked, but before my Map class gets invoked. In fact, if I use the Identity map class and/or ...
    Don BransonDon Branson
    Aug 9, 2008 at 12:36 pm
    Aug 10, 2008 at 7:42 pm
  • Since hadoop-0.18 is now available, hbase-0.18.0 is now feature frozen. The only changes that will be accepted until hbase-0.18.0 is released are blocker level bug fixes. I will be moving Jiras for ...
    Jim KellermanJim Kellerman
    Aug 21, 2008 at 10:45 pm
    Aug 22, 2008 at 5:57 pm
  • I'm running an experiment on EC2 (10 node cluster) that involves inserting 12 million records (about 1.6GB) of data into HBase. The data is in HDFS and I'm running M/R jobs to write to HBase. The ...
    Manish KatyalManish Katyal
    Aug 21, 2008 at 3:56 pm
    Aug 22, 2008 at 2:35 am
  • Greetings, I am trying to set up a hbase cluster. To simplify the setting, i first tried the single node cluster, where HDFS name/data node are set on one computer, and hbase master/regionserver are ...
    Yabo-Arber XuYabo-Arber Xu
    Aug 1, 2008 at 9:41 am
    Aug 2, 2008 at 6:01 pm
  • Since HBase became a subproject of Hadoop, it started its own release numbering scheme. However, because a particular release of HBase requires a specific release of Hadoop, HBase will change so that ...
    Jim KellermanJim Kellerman
    Aug 21, 2008 at 10:38 pm
    Aug 23, 2008 at 6:19 am
  • Hey all, I'm trying to insert a large number of rows into my table (about 5000) and it's proving very slow - ~2 seconds / row. The data's very simple, with IP addresses being used as the row key and ...
    Chris PatersonChris Paterson
    Aug 12, 2008 at 1:09 pm
    Aug 16, 2008 at 3:17 pm
  • Hello, everyone. I tried to insert 100,000,000 rows into a HBase table, however, HBase stops its operation whenever it inserted about 270,000 rows. How could I insert 100,000,000 rows of data without ...
    Aug 18, 2008 at 11:40 am
    Aug 26, 2008 at 2:06 am
  • I want to write a method *public boolean isExistColumnFamily(String columnFamily) { // TODO: ?? } *Could you help me?
    Trong Tran BInhTrong Tran BInh
    Aug 21, 2008 at 4:03 pm
    Aug 22, 2008 at 4:21 am
  • hi guys does anyone knows how I can query hbase (or hadoop) for the number of physical data nodes (slaves) ? Yoav. -- View this message in context: ...
    Aug 14, 2008 at 12:44 pm
    Aug 17, 2008 at 10:37 pm
  • Hi community, In a move to better inform the new and current users of HBase, I decided to start a blog. For the moment, this will be personal project where I will share my thoughts, tricks and other ...
    Jean-Daniel CryansJean-Daniel Cryans
    Aug 30, 2008 at 2:23 am
    Sep 2, 2008 at 4:16 pm
  • This is the second 0.2.0 release candidate. It is available for download here: http://people.apache.org/~stack/hbase-0.2.0-candidate-2/ Please take this candidate for test drive. Check the ...
    Aug 5, 2008 at 9:44 pm
    Aug 8, 2008 at 7:55 pm
  • Afternoon all, I'm attempting to setup HBase 0.1.3 to run on top of the Hadoop 0.17.1 DFS, however I'm having trouble. HBase is running at the moment (I can enter the shell, and create/show tables), ...
    Chris PatersonChris Paterson
    Aug 6, 2008 at 1:32 pm
    Aug 6, 2008 at 4:39 pm
  • Hi, We're trying to run HBase 0.2.0 on Hadoop 0.17.1 with Kosmos File System. But with got a problem with starting HBase Master. It throws this exception: 2008-08-20 09:58:58,017 INFO ...
    Krzysztof SzlapinskiKrzysztof Szlapinski
    Aug 20, 2008 at 8:03 am
    Aug 25, 2008 at 9:00 pm
  • Hello, I just read the message about concurrent access in this mailing list ...
    Aug 6, 2008 at 10:54 am
    Aug 6, 2008 at 9:25 pm
  • Hi all, I am evaluating the performance and scalability of hbase0.2.0 (work with hadoop0.17.1) by the PerformanceEvaluation.java in src/test. This test is run on AamzonEC2 and I have some question ...
    Aug 28, 2008 at 7:01 am
    Sep 22, 2008 at 2:22 am
  • Re-posing this to a more appropriate list - this is something that's more likely to appear when using hbase. Hi all, I have been trying to play with Hbase in the last few days and hit a snag - when ...
    Cristian IvascuCristian Ivascu
    Aug 25, 2008 at 6:29 am
    Aug 25, 2008 at 9:04 pm
  • Have we looked at the option to set the default block size of the HStoreFile's? Reading over bigtable they use a default 64KB Block Size and 8KB on tables that do heavy random read's. Should make ...
    Billy PearsonBilly Pearson
    Aug 21, 2008 at 8:14 pm
    Aug 22, 2008 at 2:44 am
  • How do deletes work in HBase? Suppose I have 2 Column Families and a key that has entries for both column families. Now I want to delete this key. Is a major compaction absolutely essential for this ...
    John RyanJohn Ryan
    Aug 18, 2008 at 11:49 pm
    Aug 20, 2008 at 6:28 pm
  • Hi All, We've noticed a strange behaviour on hbase 0.2 (we are not sure if the same problem exists in previous releases). When we put one row into a table the inserted data is not imidiatelly ...
    Krzysztof SzlapinskiKrzysztof Szlapinski
    Aug 23, 2008 at 10:09 pm
    Aug 27, 2008 at 8:34 pm
  • Hi I've started to play with hbase after reading the google big table paper and finding the bigtable/hbase approach very interesting. I am playing around with a little scenario: I've have created a ...
    Christian HvitvedChristian Hvitved
    Aug 16, 2008 at 2:55 pm
    Aug 16, 2008 at 8:18 pm
  • hi all - I'm a new (would be) user ,yet I already have a question... it is probably pretty silly, but I couldn't find anything in the FAQ. Wen trying to run the unit tests for 0.2.0 I get the ...
    Aug 12, 2008 at 6:56 am
    Aug 15, 2008 at 5:36 pm
  • To whom it may concern, I have invoked JobClient to fetch the Max Mappers and Reducers supported by the cluster and when I launched the MR job, I see some huge numbers like the following from the MR ...
    Andy LiAndy Li
    Aug 29, 2008 at 8:39 pm
    Aug 31, 2008 at 9:46 pm
  • Can you use the shell to add a column family to an existing table? I can't seem to figure out how to do that.
    Daniel LeffelDaniel Leffel
    Aug 29, 2008 at 4:47 pm
    Aug 29, 2008 at 5:15 pm
  • Hello, In my opinion, HBase acts like a key-based system. All the data in HBase is indexed by a row key, column key, and a timestamp. We can operate the data in HBase by keys conveniently and fast. ...
    Samuel GuoSamuel Guo
    Aug 28, 2008 at 7:53 am
    Aug 29, 2008 at 1:14 am
  • 2


    gaozhi, What is your setup like? How many regionservers? Is it in a VM? What are your machines like? Have you checked in your node's ( logs to see if there is anything anormal? Can you ...
    Jean-Daniel CryansJean-Daniel Cryans
    Aug 18, 2008 at 8:33 pm
    Aug 19, 2008 at 2:44 am
  • How do I do this in 0.2.0? Am I right in thinking this functionality is not yet exposed through the thrift interface? Toby
    Toby WhiteToby White
    Aug 13, 2008 at 10:41 am
    Aug 13, 2008 at 4:23 pm
  • I'm using the python thrift bindings to hbase (generated as per http://yannramin.com/2008/07/19/using-facebook-thrift-with-python-and-hbase/ , and following the example usage in ...
    Toby WhiteToby White
    Aug 12, 2008 at 6:02 pm
    Aug 13, 2008 at 10:38 am
  • I had set cluster HBase and wroted Java-class to extract data ================================================================== public String getContent(String rowKey, HTable htable) { String result ...
    Aug 11, 2008 at 4:14 pm
    Aug 12, 2008 at 1:20 am
  • Hello. I made some tests with HBase 0.2.0 (RC2), focused on insertion and timestamps behaviour. I had some surprising results, and I was wondering if people using hbase already tried such an usage, ...
    Aug 8, 2008 at 11:25 am
    Aug 11, 2008 at 6:42 pm
  • Hi all, I'm just getting started with HBase and am going through the docs. I've noticed that the 'Getting Started' & 'API Docs' links at http://hadoop.apache.org/hbase/docs/current/ are broken and ...
    Moazam RajaMoazam Raja
    Aug 10, 2008 at 1:54 am
    Aug 10, 2008 at 8:35 pm
  • Afternoon all, I'm attempting to setup HBase 0.1.3 to run on top of the Hadoop 0.17.1 DFS, however I'm having trouble. HBase is running at the moment (I can enter the shell, and create/show tables), ...
    Chris PatersonChris Paterson
    Aug 6, 2008 at 1:20 pm
    Aug 6, 2008 at 4:36 pm
  • Greetings: I have a map reduce job based on TableMap that takes a single memory cached column on a single table as an input (all rows, of course). What we need to have happen is to have the system ...
    Jeff PayneJeff Payne
    Aug 28, 2008 at 7:21 pm
    Aug 29, 2008 at 8:32 pm
  • Hi, I'm new to the list. I'm getting the same error described in this thread: http://markmail.org/message/sfnjtuzfsqxpprvv and under similar circumstance, i.e. I am not referring to LongWritable ...
    Allen DayAllen Day
    Aug 28, 2008 at 12:40 am
    Aug 28, 2008 at 5:03 am
  • Hi All, Forgive me if a few of the answers to the below questions seem obvious but I just want to clarify my understanding about HBase. Firstly in an ideal environment where you deploy Habase on an ...
    Charles MasonCharles Mason
    Aug 26, 2008 at 4:33 pm
    Aug 26, 2008 at 5:22 pm
  • Hello, I've been trying to implement an HBase map & reduce job. Going through the API documentation at http://hadoop.apache.org/hbase/docs/r0.2.0/api/index.html I've found an nice example, but its ...
    Rafael TurkRafael Turk
    Aug 23, 2008 at 2:35 pm
    Aug 23, 2008 at 2:41 pm
  • Hi, I noticed there is a JIRA issue about HBase/Zookeeper integration in the 0.3 roadmap plan. And I’m also told that HBase 0.3 will be released around the end of this year. Is there a concrete date ...
    Aug 21, 2008 at 4:03 pm
    Aug 21, 2008 at 6:39 pm
  • Hi I was perusing through the code in the HStore.java class. In the function compact() which takes an array of CompactionReaders there is seems to be no deserialization happening when you read the ...
    John RyanJohn Ryan
    Aug 19, 2008 at 3:59 pm
    Aug 20, 2008 at 9:40 pm
  • hi experts maybe someone can give an insight on the following case : I have two regionservers and a separate master, I was able to create and list tables from the shell. yet my java application hangs ...
    Aug 19, 2008 at 1:04 pm
    Aug 19, 2008 at 3:15 pm
  • We are looking at storing aggregated web-server log data in HBase and are curious about the practical limits of the timestamp dimension of cells. Can we use the timestamp/version dimension to store ...
    Alex VollmerAlex Vollmer
    Aug 19, 2008 at 12:23 am
    Aug 19, 2008 at 12:36 am
  • I've just came across this msg while starting hbase on 3 node cluster. Formatting hadoop namenode helped. But I still wonder what could cause this error msg. It's seems that -ROOT- is corrupted. Am I ...
    Krzysztof SzlapinskiKrzysztof Szlapinski
    Aug 18, 2008 at 12:25 pm
    Aug 18, 2008 at 12:38 pm
  • I'm running hbase0.2.0/hadoop0.17.0 with a simple script to create a table, then fill it with data. The create table part isn't a MR job, but run from the hadoop jar. (I used the Gradestable example ...
    Mark SnowMark Snow
    Aug 15, 2008 at 3:38 am
    Aug 15, 2008 at 4:03 am
  • The HBase 0.2.0 release includes 291 changes [1]. New features include a richer API, a new ruby irb-based shell, an improved UI, and many improvements to overall stability. To download, visit [4]. ...
    Aug 8, 2008 at 9:24 pm
    Aug 13, 2008 at 1:37 pm
  • It's been asked before but with no answer. Has anyone tried running HBase on Kosmos File System with a success? Is it compatible with hbase 0.2.0? We've run some tests and it's seems that hadoop is ...
    Krzysztof SzlapinskiKrzysztof Szlapinski
    Aug 6, 2008 at 9:51 pm
    Aug 6, 2008 at 10:04 pm
  • Hi, I'm running RowCounter (script below) from the new hirb shell on a 130+ regions table (~250GB) and it creates a local job(that I don't expect to end :) ). It even fails if I try to specify an ...
    Cosmin LeheneCosmin Lehene
    Aug 13, 2008 at 3:05 pm
    Aug 13, 2008 at 3:05 pm
  • Hi communities, Do you have any idea how to get the pairs of all row key combinations w/o repetition on Map/Reduce as describe below? Input : (MapFile or Hbase Table) <Key1, Value or RowResult <Key2, ...
    Edward J. YoonEdward J. Yoon
    Aug 13, 2008 at 12:17 pm
    Aug 13, 2008 at 12:17 pm
  • Hello, I would like to announce that on Monday September 8, 2008 at 5:00pm in the newthinking store (Tucholskystr. 48, Berlin) the second Hadoop Get Together in Berlin is going to take place. Just ...
    Isabel DrostIsabel Drost
    Aug 12, 2008 at 6:48 pm
    Aug 12, 2008 at 6:48 pm
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58 users for August 2008

Jean-Daniel Cryans: 45 posts Stack: 42 posts Andrew Purtell: 24 posts Jim Kellerman: 21 posts Dru Jensen: 14 posts Billy Pearson: 13 posts Daniel Leffel: 10 posts Krzysztof Szlapinski: 7 posts Mork0075: 7 posts Chris Paterson: 6 posts Yoav Morag: 6 posts Chris Paterson: 5 posts Jonathan Gray: 5 posts Nickolai Toupikov: 5 posts Tim Sell: 5 posts Edward J. Yoon: 4 posts Jay Kim: 4 posts John Ryan: 4 posts Leon Mergen: 4 posts Manish Katyal: 4 posts
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