Grokbase Groups HBase user May 2012

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140 discussions - 768 posts

  • Hi, We're seeing occasional regionserver crashes during heavy write operations to Hbase (at the reduce phase of large M/R jobs). I have increased the file descriptors, HDFS xceivers, HDFS threads to ...
    Eran KutnerEran Kutner
    May 10, 2012 at 8:18 am
    Aug 30, 2012 at 10:37 pm
  • Dear all, I have first a problem with Hbase I am trying to install it on a distributed/multinode cluster.. I am using the cloudera ...
    Dalia SobhyDalia Sobhy
    May 12, 2012 at 11:44 am
    May 20, 2012 at 1:34 pm
  • Hi All, I am using cdh4b1 which has HBase 0.92 version. I am running a standalone installation of HBase on 4 GB VM which runs on top of 8gb Windows 7 installation. My laptop has a Intel I7-2.3 ghz ...
    Anil guptaAnil gupta
    May 14, 2012 at 7:03 pm
    May 16, 2012 at 6:16 pm
  • I deleted the folder use bin/hadoop fs -rmr /hbase/cjjWaitHash ,and deleted the row with prefix cjjWaitHash in .META. Now how can I drop the table cjjWaitHash ?
    Jiajun ChenJiajun Chen
    May 7, 2012 at 1:15 pm
    Jun 27, 2012 at 4:05 am
  • Hi, Im trying to get Duo core computer to run 2 data nodes on Hadoop. What do I have to do to add the other node as a slave? -- View this message in context ...
    May 9, 2012 at 6:17 pm
    May 17, 2012 at 2:03 am
  • Hi all, Is it possible to use table scanner (different from the host table region) or execute coprocessor of another table, in the endpoint coprocessor? It looks like chaining coprocessors. But I ...
    Fding hbaseFding hbase
    May 14, 2012 at 9:36 am
    May 18, 2012 at 10:40 am
  • Hi all, I'm upgrading our cluster with the following versions: HBase 0.90.2 to 0.94.0 Hadoop 0.20.3 to 1.0.3 zookeeper 3.3.2 to 3.4.3 As a first step, I'm trying to run some tests on my PC and I get ...
    Amit SelaAmit Sela
    May 31, 2012 at 3:55 pm
    Jun 3, 2012 at 7:29 am
  • I would like to schedule major compaction on a region programmatically. I found the API call below which can properly achieve my goal. HBaseAdmin.majorCompact(String tableOrRegionName) It turns out ...
    Chen SongChen Song
    May 17, 2012 at 6:12 pm
    May 18, 2012 at 3:03 pm
  • Hi all, I just upgraded from HBase 0.90.2 to 0.94 (running on hadoop 0.20.3). It seems like the cluster is up and running. I tried running an old MR job that writes into HBase, and after Map is ...
    Amit SelaAmit Sela
    May 29, 2012 at 1:14 pm
    Jul 27, 2012 at 7:20 am
  • Hi, I've installed hbase on the following configuration : 12 x (rest hbase + regionserver hbase + datanode hadoop) 2 x (zookeeper + hbase master) 1 x (zookeeper + hbase master + namenode hadoop) OS ...
    Cyril ScetbonCyril Scetbon
    May 29, 2012 at 2:47 pm
    Jun 6, 2012 at 9:59 am
  • Hi all, I'm happy to announce HappyBase, a developer-friendly Python library to interact with Apache HBase. HappyBase is designed for for use in standard HBase setups, and offers application ...
    Wouter BolsterleeWouter Bolsterlee
    May 21, 2012 at 1:29 am
    May 24, 2012 at 3:38 pm
  • Hello, It seems for my hbase installation anyone can delete my tables. Is there a way to prevent this? I would like to have only owner of Hmaster with super authority. tia -- --- Get your facts ...
    May 15, 2012 at 2:42 am
    May 17, 2012 at 9:40 pm
  • HBase0.92.1 ERROR: org.apache.hadoop.hbase.TableNotEnabledException: org.apache.hadoop.hbase.TableNotEnabledException: cjjWaitHash ERROR: org.apache.hadoop.hbase.TableNotDisabledException ...
    Jiajun ChenJiajun Chen
    May 4, 2012 at 8:56 am
    May 7, 2012 at 4:58 am
  • Hello list, I have some time now to try out HBase and want to use it for a private project. Questions like "How to I transfer one-to-many or many-to-many relations from my RDBMS's schema to HBase?" ...
    May 28, 2012 at 5:50 pm
    May 29, 2012 at 11:31 pm
  • I am new to HBase and started working on a project which needs meta information on HBase regions for a table. The version of HBase I am using 0.90.4. The use case is very simple. First, I want to get ...
    Chen SongChen Song
    May 15, 2012 at 9:09 pm
    May 16, 2012 at 8:12 pm
  • I ran the following MR job that reads AVRO files & puts them on HBase. The files have tons of data (billions). We have a fairly decent size cluster. When I ran this MR job, it brought down HBase ...
    Something SomethingSomething Something
    May 9, 2012 at 2:52 pm
    May 16, 2012 at 7:40 am
  • I'm interested to learn if people are using hbase as a primary store or is it more for "2nd class" type data. Pretend you have a CMS product, or eCommerce Saas application: What I mean by this is, I ...
    S AhmedS Ahmed
    May 14, 2012 at 12:15 am
    May 14, 2012 at 7:47 pm
  • Hi, Based on the example on and some searches I'm guessing it's not possible to switch an existing HBase table to use Snappy ...
    Otis GospodneticOtis Gospodnetic
    May 9, 2012 at 9:06 pm
    May 10, 2012 at 5:22 pm
  • Regards to all the list. We are using Amazon S3 to store millions of files with certain format, and we want to read the content of these files and then upload its content to a HBase cluster. Anyone ...
    Marcos OrtizMarcos Ortiz
    May 24, 2012 at 6:53 pm
    May 30, 2012 at 3:57 pm
  • Hello, This is really a MapReduce question, but the output from this will be used to create regions for an HBase table. Here's what I want to do: Take an input file that contains data about users ...
    Something SomethingSomething Something
    May 12, 2012 at 11:22 pm
    May 14, 2012 at 4:45 pm
  • Hi, I am trying generate an HFile and load it to hbase programmatically. (importtsv does not fit my requirements) I have modified TestLoadIncrementalHFiles class and try to load an example hfile. But ...
    Sakin caliSakin cali
    May 24, 2012 at 6:12 am
    May 24, 2012 at 3:15 pm
  • Hi, HBase version : 0.92.1 Hadoop version: 0.20.2-cdh3u0 Relavant configurations: * hbase.regionserver.fileSplitTimeout : 300000 * hbase.hstore.compactionThreshold : 3 * hbase.hregion.max.filesize ...
    Shrijeet PaliwalShrijeet Paliwal
    May 13, 2012 at 11:13 pm
    May 14, 2012 at 10:27 pm
  • This is a straightforward question and problem. Get get = new Get(rowkey); FilterList filterList = new FilterList(); filterList.addFilter(new ColumnCountGetFilter(100)); get.setFilter(filterList) ...
    Ben KimBen Kim
    May 29, 2012 at 11:35 am
    Jun 4, 2012 at 8:36 am
  • My program writes changes to HBase table by issuing lots of Puts (autoCommit turned off, flush on end) and afterwards uses ResultScanner on whole table to read all rows and act upon them. My problem ...
    Ondřej StašekOndřej Stašek
    May 29, 2012 at 1:13 pm
    Jun 1, 2012 at 8:08 am
  • Hi All, We are planning to store data in HBase. Currently, in one of our use case once a row is written into HBase Table we wont be modifying the data of that row. Since, for every cell(right?) in ...
    Anil guptaAnil gupta
    May 24, 2012 at 9:52 pm
    May 30, 2012 at 7:58 pm
  • Hello, I'd like to collect opinions from HBase experts on the query uniformity and whether there's any advance technique currently exists in HBase to cope with the problems of query uniformity beyond ...
    Dmitriy LyubimovDmitriy Lyubimov
    May 25, 2012 at 5:31 pm
    May 27, 2012 at 4:57 am
  • I have a client which connects to Zookeeper (which runs as part of HBase installation) from my web application running on top of Tomcat Servlet Container. Now whenever I restart my Tomcat the ...
    Narendra yadalaNarendra yadala
    May 11, 2012 at 1:24 pm
    May 25, 2012 at 6:45 am
  • Hi, In my hbase table I have around 10000 data ,need to fetch first 100 then next 100 row like that.How can I run a java code to fetch like that, by setting limit and offset. -- View this message in ...
    May 24, 2012 at 12:51 pm
    May 24, 2012 at 1:18 pm
  • Hi! Just trying to check that I understand things correctly about configuring memstore flushes. Basically, there are two groups of configuraion properties (leaving out region pre-close flushes): 1 ...
    Alex BaranauAlex Baranau
    May 8, 2012 at 8:01 pm
    May 23, 2012 at 9:42 pm
  • Hi, I am trying to delete the whole row from hbase in my production cluster in two ways, 1) I have written a mapreduce program to remove many rows which satisfy certain condition to do that, The key ...
    Mahesh BalijaMahesh Balija
    May 14, 2012 at 4:57 am
    May 15, 2012 at 6:46 am
  • I'm looking at the client code here: Is this the high level operations, and the actual sending of ...
    S AhmedS Ahmed
    May 29, 2012 at 2:16 pm
    Jun 1, 2012 at 10:45 pm
  • I have HBase version 0.92.1 running in standalone mode. I created a table and added few rows using hbase shell. Now I am developing a standalone java application to connect to Hbase and retrieve the ...
    AnandaVelMurugan Chandra MohanAnandaVelMurugan Chandra Mohan
    May 29, 2012 at 1:30 pm
    Jun 1, 2012 at 9:05 am
  • Hi, I am curious and trying to learn which method is best when wanting to limit a scan to a particular column or column family. The Scan class carries a Filter instance and a TreeMap of the family ...
    May 30, 2012 at 5:00 pm
    May 31, 2012 at 11:44 am
  • I have following Get code with HBase 0.92.0 Get get = new Get(Bytes.toBytes(rowkey)); get.addFamily(family); Filter filter = new QualifierFilter(CompareOp.NOT_EQUAL, new BinaryComparator(item)) ...
    Ben KimBen Kim
    May 29, 2012 at 1:12 am
    May 29, 2012 at 10:27 am
  • Hi, I'm new to HBase and I have a question about using filters. I know that I can use filters with scan, say scan start-key=key1 & end-key=key2 and with a SingleColumnValueFilter: columnA=valueA. But ...
    Jack chrispooJack chrispoo
    May 25, 2012 at 12:06 am
    May 28, 2012 at 12:22 pm
  • Hi, I'm starting to give coprocessors a try, but I'm having trouble getting the HBase cluster to start up properly after deploying the new configuration. My coprocessor is trivial, but it is only to ...
    May 25, 2012 at 1:56 pm
    May 27, 2012 at 4:53 am
  • Hi, We have a MapReduce job of which input data is from HBase. We would like to improve performance of the job. According to the HBase book, we can do that by setting scan caching to a number higher ...
    Ey-Chih chowEy-Chih chow
    May 25, 2012 at 6:03 pm
    May 25, 2012 at 8:49 pm
  • Hi I'm trying to use Put operations to replace ("set") already existing rows by nullify certain columns and qualifiers as part of an Put operation. The reason I want to do this is 1) keep the ...
    Kristoffer SjögrenKristoffer Sjögren
    May 22, 2012 at 4:56 pm
    May 23, 2012 at 2:08 pm
  • All We run a load test and after about 3 hours our application stopped. Check the logs I see this in the hbase-master log 2012-05-20 08:08:17,251 INFO ...
    Ben CuthbertBen Cuthbert
    May 20, 2012 at 7:13 am
    May 20, 2012 at 4:58 pm
  • Hi, hoping to learn a bit by asking is the most efficient way to grab a single row from an HTable? One can ask the HTable directly by creating a Get object, or one can create a Scan object with a Get ...
    May 9, 2012 at 8:20 pm
    May 10, 2012 at 2:36 pm
  • Hello, Does HBase know how much space it is occupying on HDFS? I looked at these two: ...
    Otis GospodneticOtis Gospodnetic
    May 7, 2012 at 2:42 am
    May 8, 2012 at 6:50 pm
  • I have not found any documentation on how hbase would work across multiple data-centers. In fact, I am concerned about how a centralized zookeeper would make multi-data center support impossible. How ...
    Marco VillalobosMarco Villalobos
    May 3, 2012 at 6:10 pm
    May 3, 2012 at 10:37 pm
  • Hi folks, It is more like an operation question. Hbase version is 0.90.4, we have a weekly job to fix known issues such as META table out of sync, inactive/overlapping/dangling regions while hbase is ...
    Xu, RichardXu, Richard
    May 28, 2012 at 4:06 pm
    May 29, 2012 at 5:55 am
  • Hi All, Running into this issue after updating hbase. How can I fix it? Exception in thread "main" java.lang.RuntimeException: hbase-default.xml file seems to be for and old version of HBase ...
    Prashant KommireddiPrashant Kommireddi
    May 25, 2012 at 6:02 am
    May 25, 2012 at 7:15 pm
  • Simple question, what's the difference between "Append" and "Put"? It seems they both can put some datas into a row. Dose "Append" keep several write operations in atom but Put not? if it is, then is ...
    May 23, 2012 at 3:50 am
    May 25, 2012 at 3:39 am
  • Hi, We've noticed in our production cluster (0.90.4-cdh3u3) that from time to time some of our map tasks fail due to a LeaseException thrown while scanning. We have "", ...
    Igal ShilmanIgal Shilman
    May 21, 2012 at 2:35 pm
    May 24, 2012 at 6:38 pm
  • Hello folks, i am trying to come up with a nice key design for storing logs in the company. I am planning to index them and store row key in the index for random reads. I need to balance the writes ...
    May 21, 2012 at 2:56 pm
    May 22, 2012 at 9:15 pm
  • I use importtsv to load data as HFile hadoop jar hbase-0.92.1.jar importtsv -Dimporttsv.bulk.output=/outputs/mytable.bulk -Dimporttsv.columns=HBASE_ROW_KEY,ns: -Dimporttsv.separator=, mytable /input ...
    Bruce BianBruce Bian
    May 11, 2012 at 2:29 am
    May 13, 2012 at 2:00 am
  • Hi All, I am using cdh4b1 which has HBase 0.92.0 in a standalone installation on CentOS6.0. My objective was to check out the feature of aggregation in HBase via coprocessors. So, i decided to test ...
    Anil guptaAnil gupta
    May 7, 2012 at 6:45 pm
    May 7, 2012 at 9:51 pm
  • Is there a way to add multiple filter list to a scan object. ie, scan.setFilter(Filterlist1); scan.setFilter(Filterlist2); scan.setFilter(Filterlist3); Where Filterlist1,Filterlist2 are objects of ...
    May 2, 2012 at 1:23 pm
    May 2, 2012 at 3:37 pm
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162 users for May 2012

Michael Stack: 33 posts Michel Segel: 31 posts Jean-Daniel Cryans: 25 posts Shashwat Shriparv: 25 posts Doug Meil: 22 posts Harsh J: 22 posts Ted Yu: 21 posts Anil Gupta: 20 posts Andrew Purtell: 18 posts Jiajun Chen: 18 posts Marcos Ortiz Valmaseda: 17 posts Dalia Sobhy: 15 posts Something Something: 15 posts Bryan Beaudreault: 13 posts Chen Song: 12 posts Ian Varley: 12 posts Otis Gospodnetic: 12 posts Amit Sela: 11 posts S Ahmed: 11 posts Andrew Purtell: 10 posts
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