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62 discussions - 274 posts

  • When I tried to bulk import, I received below error. (code is same with hbase wiki) 08/11/20 15:23:50 INFO mapred.JobClient: map 62% reduce 0% 08/11/20 15:27:10 INFO mapred.JobClient: map 30% reduce ...
    Edward J. YoonEdward J. Yoon
    Nov 20, 2008 at 6:41 am
    Dec 3, 2008 at 8:38 am
  • Hi, I have a few problems running hbase reliable on my 8 node cluster and some questions on performance. (hbase 0.18.1 hadoop 0.18.1 with default settings from hbase except for master and rootdir) ...
    Thibaut_Thibaut_
    Nov 30, 2008 at 1:03 am
    Dec 2, 2008 at 6:56 pm
  • Hi.Is it possible to get the timestamp that batchupdate was commit with. Currently, I'm just trying to get row after commit and take it timestamp, but i found that this cause about 20% overhead in my ...
    Slava GorelikSlava Gorelik
    Nov 20, 2008 at 1:03 pm
    Nov 21, 2008 at 6:20 am
  • Hi, all I guess that Hbase master server is a single point of failure. Is it correct ? Does Hbase (I mean the whole stack -- HDFS + Hbase) have any other single point of failure ? If Hbase has a ...
    Michael DagaevMichael Dagaev
    Nov 7, 2008 at 10:33 am
    Nov 7, 2008 at 7:49 pm
  • Hi, I am trying to run a map reduce job which parses a text file and fills up a Hbase Table. Following is the code : public class UploadMoviesList extends Configured implements Tool { public static ...
    Nishant KhuranaNishant Khurana
    Nov 28, 2008 at 7:49 pm
    Nov 29, 2008 at 4:46 pm
  • hello, every one. i used to test the performance in PE, but the performance is not well enough. especially, the table format is not as what i need. so, i create a table and write some string in every ...
    王凯王凯
    Nov 11, 2008 at 8:36 am
    Nov 13, 2008 at 5:29 pm
  • Hello, all We are planning to host a Hadoop Beijing meeting on next Sunday(23th of Nov.). We now welcome speakers and participants! If you are interested in cloud computing topics and you can join us ...
    永强 何永强 何
    Nov 12, 2008 at 10:46 am
    Nov 13, 2008 at 2:13 pm
  • Hi, I have a table which appears to have two regions without a start key. Is that expected? My job is getting stuck scanning these two regions. Any suggestions? Thanks. -- Arthur van Hoff - Grand ...
    Arthur van HoffArthur van Hoff
    Nov 12, 2008 at 4:16 pm
    Nov 12, 2008 at 9:36 pm
  • Pigi Project (ORM-like framework or indexing for HBase if you like) has finally webpage. On www.pigi-project.org <http://www.pigi-project.org/ you will find release library and more documentation. ...
    Krzysztof GałęckiKrzysztof Gałęcki
    Nov 4, 2008 at 11:58 pm
    Nov 7, 2008 at 10:06 pm
  • Hi, I'm considering to store the large-scale web-mail data on the Hbase. IMO, I expect to be able to solve both real-time and batch (e.g. spam filtering, from/to graph, ..., etc) issues. But I'm ...
    Edward J. YoonEdward J. Yoon
    Nov 18, 2008 at 2:18 am
    Nov 19, 2008 at 11:55 pm
  • I started getting these when the server are under heavy load java.io.IOException: java.io.IOException: java.util.NoSuchElementException at java.util.TreeMap.key(TreeMap.java:1206) at ...
    Billy PearsonBilly Pearson
    Nov 11, 2008 at 12:17 am
    Nov 12, 2008 at 1:16 am
  • After upgrade hadoop to 0.18.2 from 0.18.1, I received an UnknownScannerException. And, Map in/output bytes are only 288 bytes. Does anyone know about this? ---- hadoop@vldb ~/hama-trunk $ bin/hama ...
    Edward J. YoonEdward J. Yoon
    Nov 6, 2008 at 7:53 am
    Nov 10, 2008 at 7:10 am
  • Hi, all Let there is a row in People table. The column family Details consists of name, address, and email. Now I have a Person object which corresponds to this row. This object contains name and ...
    Michael DagaevMichael Dagaev
    Nov 4, 2008 at 6:32 pm
    Nov 6, 2008 at 4:18 pm
  • Hi , I'm using hbase0.2.1 + hadoop 0.17 with 11 client & 1master servers I crawl some data and save them to hbase with map & reduce. after that , I try to count the total number of some data. it too ...
    Jarod FengJarod Feng
    Nov 7, 2008 at 8:21 am
    Nov 10, 2008 at 9:34 pm
  • Hi, I was wondering if there is a low cost (as in memory) and fast way to check if a certain cell already exists? I need to insert a cell, but based on if it was there before or not increase a ...
    Lars GeorgeLars George
    Nov 9, 2008 at 2:42 pm
    Nov 10, 2008 at 9:14 am
  • I been looking over the MapFile class on hadoop for memory problems and thank I might have found an index bug org.apache.hadoop.io.MapFile line 202 if (size % indexInterval == 0) { // add an index ...
    Billy PearsonBilly Pearson
    Nov 5, 2008 at 2:33 am
    Nov 6, 2008 at 4:09 pm
  • While run mapred, I received below error. The size of RowResult seems too large. What do you think? ---- 08/11/27 13:42:49 INFO mapred.JobClient: map 0% reduce 0% 08/11/27 13:42:55 INFO ...
    Edward J. YoonEdward J. Yoon
    Nov 27, 2008 at 6:12 am
    Dec 14, 2008 at 10:36 pm
  • Hi I've seen this issue a lot in the mailing list, but I still have a doubt. My map tasks keep failing with unknownscannerexception (2 map tasks on same node over a 3 node cluster with 4Gb mem, ...
    David AlvesDavid Alves
    Nov 21, 2008 at 9:58 am
    Dec 12, 2008 at 9:02 am
  • Hi, Does HBase/Hadoop create map tasks on the same data node that contains the region for the map task? I know that Bigtable does something like that but I could not find any mention of this ...
    David FaitelsonDavid Faitelson
    Nov 26, 2008 at 11:32 am
    Nov 26, 2008 at 6:00 pm
  • Let's assume that row key is a email address, a unique identifier for login user and also a sender & receiver. and column families are meta data. (e.g. from, to, cc, bcc, reply-to, subject, content, ...
    Edward J. YoonEdward J. Yoon
    Nov 25, 2008 at 10:57 am
    Nov 26, 2008 at 11:11 am
  • Hi, I was looking at the API Docs and HQL shell to create tables for Hbase. I couldn't figure out : 1) How to create column families such that each column family contains more than one column through ...
    Nishant KhuranaNishant Khurana
    Nov 22, 2008 at 5:28 am
    Nov 25, 2008 at 2:01 am
  • Hi guys We've got HBase(0.18.0, r695089) and Hadoop(0.18.0, r686010) running for a while, and apart from the ocasional regionserver stopping without notice (and whithout explanations from what we can ...
    David AlvesDavid Alves
    Nov 20, 2008 at 8:22 am
    Nov 20, 2008 at 7:17 pm
  • hi,all The hadoop beijing meeting agenda is ready now. Currently I only count people who have replied my email or post on google group. I will send people i have counted a word document. We now still ...
    HeyongqiangHeyongqiang
    Nov 19, 2008 at 4:41 pm
    Nov 19, 2008 at 6:25 pm
  • Hi, I would like to ask about a potential workaround/pattern. Let's say you have a schema with 10 tables and want to have unit tests with embedded HBase (similar way as in HBase tests). The way we do ...
    PrzemekPrzemek
    Nov 15, 2008 at 10:27 am
    Nov 16, 2008 at 9:13 am
  • Hbase adds a time-stamp to each cell entry. BTW, I'd like to use only row, column w/o time dimension. For example, create 't1', {NAME = 'f1', VERSIONS = 0}. Is it possible? -- Best Regards, Edward J. ...
    Edward J. YoonEdward J. Yoon
    Nov 13, 2008 at 4:42 am
    Nov 14, 2008 at 9:46 am
  • Hi, I revised the sample code "Bulk Import" written by Allen Day to upload a flat data file to a hbase table. My table schema is designed as: <row key <ColFamily1:colKey <ColFamily2: colkey . The ...
    鞠適存鞠適存
    Nov 28, 2008 at 3:32 am
    Dec 1, 2008 at 1:19 pm
  • Hi, Looks like my hbase master isn't starting. Apparently an rpc is timing out and the master never starts listening on port 60000. Looks like all the region servers are up and running though they ...
    Anders BrownworthAnders Brownworth
    Nov 26, 2008 at 10:16 pm
    Nov 27, 2008 at 12:13 am
  • Hi -- I've created a builder-style HBase client DSL for Groovy -- currently it just wraps the client API to make inserts and row scans a little easier. There probably plenty of room for improvement ...
    Tom NicholsTom Nichols
    Nov 25, 2008 at 1:53 pm
    Nov 25, 2008 at 7:42 pm
  • Hi, I was writing a mapreduce class to read from a text file and write the entries to a table. My Map function reads each line and outputs a key and a MapWritable as value. I was wondering while ...
    Nishant KhuranaNishant Khurana
    Nov 23, 2008 at 11:34 pm
    Nov 25, 2008 at 6:06 pm
  • I haven't been following the progress as much as I'd like. We're using hbase 0.2.1 at the moment, and wondering what are the major improvements in 0.18? Is the better batching of bulk row updates ...
    Tim SellTim Sell
    Nov 24, 2008 at 5:56 pm
    Nov 25, 2008 at 4:36 pm
  • Bernie_woolfreyBernie_woolfrey
    Nov 23, 2008 at 4:09 am
    Nov 24, 2008 at 1:29 am
  • Dear can use RegExpRowFilter. Is there any filter available to use RegExp comparision for an ColumnValue. I hope the existing ColumnValue filter does not support it. Or other wise, do we need to use ...
    Balamurugan RajendranBalamurugan Rajendran
    Nov 17, 2008 at 6:36 am
    Nov 20, 2008 at 2:04 am
  • Hi, I am new to Hadoop and Hbase. I am trying to understand how to use map reduce with Hbase as source and sink and had following questions. Would appreciate if someone can answer them and may be ...
    Nishant KhuranaNishant Khurana
    Nov 16, 2008 at 7:09 pm
    Nov 16, 2008 at 10:23 pm
  • Hi, all Let there is a "People" table and its column family "Personal Details" contains name, address, email etc. For instance, "Personal Details:name" column contains value "Michael". Now I have to ...
    Michael DagaevMichael Dagaev
    Nov 11, 2008 at 9:55 am
    Nov 11, 2008 at 7:04 pm
  • hi all, I hava a data set stored in hbase, and I run a mapreduce program to analyze. Now I want to know how many map in a map task? Who can tell me? Thanks a lot. yours qiang.
    Ma qiangMa qiang
    Nov 10, 2008 at 8:12 am
    Nov 10, 2008 at 3:15 pm
  • Hi, I am a newbie, just got HBase installed and started playing with it. I want to perform something akin to : select rows where columnFamilyA:columnM = 'X' and columnFamilyB:columnN = 'Y' this, ...
    Mekin MaheshwariMekin Maheshwari
    Nov 4, 2008 at 11:49 am
    Nov 4, 2008 at 11:12 pm
  • We're getting to an interesting load level here now I think. The attached snapshot is typical of some cyclical loads we see. Average load is north of 100K/sec. I'd be curious to hear how this ...
    Andrew PurtellAndrew Purtell
    Nov 27, 2008 at 8:53 pm
    Nov 28, 2008 at 9:19 am
  • Hi, I'm having some problems running hbase on a small cluster of 8 nodes running hadoop. I already worked once, but I must have changed something and it doesn't work anymore... I already spent hours ...
    Thibaut_Thibaut_
    Nov 27, 2008 at 2:18 pm
    Nov 27, 2008 at 10:02 pm
  • Hi, I am working on a new project and the amount of data that will be accumulated has a tendency to get quite large. In fact, in case the project movers forward, we'll probably be looking at a ...
    Seref ArikanSeref Arikan
    Nov 25, 2008 at 1:34 pm
    Nov 25, 2008 at 7:09 pm
  • Hi. I have hbase master crashed after BulkImport mr job; is it possible that's because my configuration is bad? Can you suggest configuration for map reduce jobs with that: -hadoop 0.18.2 -hbase ...
    ROLROL
    Nov 25, 2008 at 1:41 pm
    Nov 25, 2008 at 4:46 pm
  • Hi, As each row of my hbase table can take a lot of time to process (waiting on answeres from other hosts), I would like to create a few threads to process that data in parallel. I would then use the ...
    Thibaut_Thibaut_
    Nov 16, 2008 at 7:21 pm
    Nov 16, 2008 at 10:25 pm
  • Hi all, I ran one master and three region servers on EC2. When I stopped one region server, ($HBASE_HOME/bin/hbase-daemon.sh stop regionserver) I couldn't query in HBase shell. It returns error. Can ...
    Jinyeon LeeJinyeon Lee
    Nov 14, 2008 at 8:34 am
    Nov 14, 2008 at 10:15 pm
  • Hi all I want to specify in the code which hbase-site.xml file will be used as a source for configuration. I tried to use addResources() but it doesn't work - the path is added , but nothing happends ...
    Yossi IttachYossi Ittach
    Nov 10, 2008 at 8:07 am
    Nov 10, 2008 at 10:19 pm
  • working from trunk downloaded today I get a bunch of these on start up and from shell after Root Region is reported available even on same server as the root region start up head from a RS: ...
    Billy PearsonBilly Pearson
    Nov 9, 2008 at 1:30 am
    Nov 9, 2008 at 2:28 am
  • I added the code and some documentation to a wiki page here: http://wiki.apache.org/hadoop/Hbase/Groovy . The code itself is pretty well documented so it should be fairly easy for anyone to pick up ...
    Tom NicholsTom Nichols
    Nov 28, 2008 at 8:23 pm
    Nov 29, 2008 at 5:13 am
  • Hi, all I am going to test HBase in a small EC2 cluster. What should I monitor ? First of all, I am interested in stability now (not performance). Obviously, I should monitor HBase failures, the disk ...
    Michael DagaevMichael Dagaev
    Nov 28, 2008 at 12:29 pm
    Nov 28, 2008 at 5:56 pm
  • Dear one-to-many relationship can be captured using the column family. Is there any example that shows how an one-to-many relationship value in RDBMS can be captured using the column family of HBASE. ...
    Balamurugan RajendranBalamurugan Rajendran
    Nov 25, 2008 at 7:27 am
    Nov 25, 2008 at 9:02 am
  • I've hacked together a package to ease the installation of Thrift Perl and Python bindings for HBase: http://code.google.com/p/hbase-thrift/ Enjoy, C
    Carlos ValienteCarlos Valiente
    Nov 12, 2008 at 9:17 pm
    Nov 18, 2008 at 9:29 pm
  • Hi, I wanted to test the new features of hbase but not sure which version of hadoop to use? krzysiek
    Krzysztof SzlapinskiKrzysztof Szlapinski
    Nov 17, 2008 at 2:36 pm
    Nov 17, 2008 at 4:13 pm
  • Can I write the output of the map processes directly to a local files-system without the need to use copyToLocal? I'm trying the following but the map reduce still writes the output to the HDFS path ...
    Yair Even-ZoharYair Even-Zohar
    Nov 10, 2008 at 4:33 pm
    Nov 10, 2008 at 10:11 pm
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55 users for November 2008

Stack: 62 posts Edward J. Yoon: 22 posts Slava Gorelik: 18 posts Billy Pearson: 16 posts Jean-Daniel Cryans: 13 posts Michael Dagaev: 10 posts Nishant Khurana: 10 posts 永强 何: 9 posts Jonathan Gray: 8 posts Thibaut_: 8 posts Andrew Purtell: 6 posts Andrew Purtell: 6 posts Jim Kellerman (POWERSET): 5 posts David Alves: 4 posts Krzysztof Szlapinski: 4 posts Tom Nichols: 4 posts 王凯: 4 posts Arthur van Hoff: 3 posts Balamurugan Rajendran: 3 posts Cosmin Lehene: 3 posts
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