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105 discussions - 554 posts

  • I am running a cluster and getting slow performance - about 50 reads/sec/node or about 800 reads/sec for the cluster. The data is too big to fit into memory and my access pattern is completely random ...
    Jan SchellenbergerJan Schellenberger
    Jan 31, 2014 at 11:13 pm
    Feb 3, 2014 at 4:13 am
  • Hi, We are running Opentsdb on CDH 4.3 hbase cluster, with most of the default settings. The cluster is heavy on write and I'm trying to see what parameters I can tune to optimize the write ...
    Rohit DevRohit Dev
    Jan 25, 2014 at 2:22 am
    Jan 27, 2014 at 6:38 pm
  • Hi, Have a look at http://nutch.apache.org . Version 2.x uses HBase under the hood. Otis -- Performance Monitoring * Log Analytics * Search Analytics Solr & Elasticsearch Support * ...
    Otis GospodneticOtis Gospodnetic
    Jan 3, 2014 at 6:19 am
    Jan 13, 2014 at 7:25 am
  • Hi, I have been running a map reduce job that joins 2 datasets of 1.3 and 4 GB in size. Joining is done at reduce side. Output is written to either Hbase or HDFS depending upon configuration. The ...
    Akhtar Muhammad DinAkhtar Muhammad Din
    Jan 4, 2014 at 8:18 pm
    Jan 9, 2014 at 8:27 pm
  • Hi, I know that hbase copocessor provides a quick way to count the rows of a table. But how can i count the rows that meet several conditions. Take this for example. I have a hbase table with one ...
    LeiwangoucLeiwangouc
    Jan 17, 2014 at 7:59 am
    Jan 20, 2014 at 7:41 am
  • https://github.com/zhang-xzhi/simplehbase https://github.com/zhang-xzhi/simplehbase/wiki I am writing a light weight hbase ORM now, search for some suggestion. thanks. # 3 mins on simplehbase ## ...
    Zhang_xzhiZhang_xzhi
    Jan 5, 2014 at 3:58 pm
    Jan 7, 2014 at 4:45 pm
  • Hi, It looks like going from 0.96 to 0.98 should be relatively easy, which is great. We are on 0.92 and I'm wondering if it's possible do the 0.92 == 0.96 jump without making two jumps: 0.92 == 0.94 ...
    Otis GospodneticOtis Gospodnetic
    Jan 31, 2014 at 2:36 pm
    Feb 4, 2014 at 12:35 pm
  • Hi all, This is my first time to try to setup HBase on a 10-node cluster. I tried two settings: HBase 0.94.16+Hadoop 1.2.1, and HBase 0.96.1.1+Hadoop 2.2.0. In both cases, the region servers can't ...
    Guang GaoGuang Gao
    Jan 29, 2014 at 7:04 am
    Jan 30, 2014 at 11:37 am
  • Hi, It seems some API that is supported by Thrift are not in the Thrift2 anymore, e.g. createTable, deleteTable, getTableRegions, and so on? Basically, these are those API that supported by Thrift2 ...
    Tianying ChangTianying Chang
    Jan 21, 2014 at 12:56 am
    Jan 22, 2014 at 12:59 am
  • Hi, We recently upgraded our production cluster from 0.92.1 to 0.94.6 (CDH 4.5.0). While running 0.92.1, we used the "experimental" off-heap block cache with good results, but it appears broken and ...
    DeanDean
    Jan 21, 2014 at 7:51 pm
    May 1, 2014 at 4:37 pm
  • I'm importing a set of data into HBase. The CSV file contains 82 entries per line. Starting with 8 byte ID, followed by 16 byte date and the rest are 80 numbers with 4 bytes each. The current HBase ...
    Nick XieNick Xie
    Jan 27, 2014 at 10:20 pm
    Jan 27, 2014 at 11:36 pm
  • Hi, I am designing a schema to host some large volume of data over HBase. We collect daily trading data for some markets. And we run a moving window analysis to make predictions based on a two weeks ...
    Bill QBill Q
    Jan 19, 2014 at 6:39 pm
    Jan 21, 2014 at 4:25 am
  • Hi, I am running hbase-0.94.6-cdh4.5.0 and set up a cluster of 5 nodes. The random read performance is ok, but the scan performance is poor. I tried to increase "hbase.client.scanner.caching" to 100 ...
    LEI XiaofengLEI Xiaofeng
    Jan 7, 2014 at 7:07 am
    Jan 8, 2014 at 3:51 pm
  • Dear all, I have a simple HBase MapReduce application and try to run it on a 12-node cluster using this command: HADOOP_CLASSPATH=`bin/hbase classpath` ~/hadoop-1.1.2/bin/hadoop jar xxxx.jar ...
    DaidongDaidong
    Jan 24, 2014 at 4:40 pm
    Feb 4, 2014 at 1:40 pm
  • The 1st HBase 0.98.0 release candidate (RC0) is available for download at http://people.apache.org/~apurtell/0.98.0RC0/ and Maven artifacts are also available in the temporary repository ...
    Andrew PurtellAndrew Purtell
    Jan 25, 2014 at 7:33 pm
    Feb 3, 2014 at 11:02 pm
  • Hi, I have a choice to maintain to data either in column values or as versioned data. This data is not a versioned copy per se. The access pattern on this get all the data every time So the schema ...
    Sagar NaikSagar Naik
    Jan 24, 2014 at 5:37 pm
    Jan 24, 2014 at 7:37 pm
  • Hi: When I used hadoop 2.2.0 and hbase 0.96.1.1 to using snappy compression I followed the topic http://hbase.apache.org/book/snappy.compression.html, but I get some error ,can some one help me? ...
    张玉雪张玉雪
    Jan 3, 2014 at 4:34 pm
    Jan 10, 2014 at 1:51 am
  • hi all, I am new to hbase and encounter a problem of client connection. I download latest stable version(0.94.15) and start the server successfully. And I can use ./bin/hbase shell to connect to ...
    Li LiLi Li
    Jan 5, 2014 at 6:46 am
    Jan 6, 2014 at 1:03 am
  • Hi, I have a HBase table where each row has ~1000k columns, ~2K each. My table scan pattern is to use a row key filter but I need to fetch the whole row (~1000 k) columns back. Shall I set HFile ...
    Wei TanWei Tan
    Jan 29, 2014 at 8:36 pm
    Jan 29, 2014 at 10:59 pm
  • I'm having trouble connecting to HBase from Pig's HBaseStorage<http://pig.apache.org/docs/r0.12.0/api/org/apache/pig/backend/hadoop/hbase/HBaseStorage.html command. Any help would be appreciated. I'm ...
    Russell JurneyRussell Jurney
    Jan 20, 2014 at 5:22 pm
    Jan 21, 2014 at 3:14 pm
  • Hi All.... Currently im facing the issue where region server not updating the logs. I don't know where to check nor how to proceed further. I'm using cloudera manager to manage hbase cluster. ...
    Sandeep B ASandeep B A
    Jan 17, 2014 at 12:00 pm
    Jan 21, 2014 at 6:38 am
  • Hi all, I'm trying to measure the size (in bytes) of the data I'm about to load into HBase. I'm using bulk load with PutSortReducer. All bulk load data is loaded into new regions and not added to ...
    Amit SelaAmit Sela
    Jan 15, 2014 at 1:45 pm
    Jan 19, 2014 at 12:04 am
  • Hello, We export an online snapshot of a table to a different cluster, when attempting a clone on the destination cluster using: clone_snapshot 'table_source_snapshot', 'table_dest' it does not ...
    David KochDavid Koch
    Jan 31, 2014 at 1:06 pm
    Jan 31, 2014 at 7:17 pm
  • Hi, We are seeing some unfortunately low performance in the memstore - we have researched some of the previous JIRA(s) and seen some inefficiencies in the ConcurrentSkipListMap. The symptom is a ...
    Varun SharmaVarun Sharma
    Jan 26, 2014 at 9:14 pm
    Jan 28, 2014 at 7:59 pm
  • Hi, I am trying to get more information about HBase. I would appreciate some answers to these few questions. Thanks a lot. 1. About load balancing: does HMaster monitor overloaded or low loaded ...
    Bill QBill Q
    Jan 20, 2014 at 6:28 am
    Jan 22, 2014 at 5:50 am
  • Over the course of 0.94.16 I have upgraded junit to 4.11 for 0.94 (this was done for 0.96 and later a while ago). With that in place (and a few test fixes, mostly in tests that depended on the ...
    Lars hofhanslLars hofhansl
    Jan 11, 2014 at 6:38 am
    Jan 12, 2014 at 6:05 am
  • Hi, Is it possible to include this feature in 0.94 version? https://issues.apache.org/jira/browse/HBASE-7403 I know it is available in 0.96, but I cannot upgrade to this version. Thanks, AC
    A.C. CudA.C. Cud
    Jan 8, 2014 at 11:52 pm
    Jan 10, 2014 at 1:07 pm
  • We are seeing one other issue with high read latency (p99 etc.) on one of our read heavy hbase clusters which is correlated with the balancer runs - every 5 minutes. If there is no balancing to do, ...
    Varun SharmaVarun Sharma
    Jan 28, 2014 at 3:26 am
    Jan 28, 2014 at 4:57 am
  • Hi, I added a new node to my HBase cluster. The PC is the same as the old ones. It has 24G memory. When I tried to start regionserver on that node, I got error below: Could not create the Java ...
    LEI XiaofengLEI Xiaofeng
    Jan 21, 2014 at 6:45 am
    Jan 22, 2014 at 2:36 am
  • Hi, for an application still running on Hbase 0.90.4 (but moving to 0.94.6) we are thinking about using more efficient composite row keys compared what we use today (fixed length strings with "/" ...
    Henning BlohmHenning Blohm
    Jan 14, 2014 at 2:57 pm
    Jan 15, 2014 at 8:25 am
  • Hi, I watched this youtube video http://www.youtube.com/watch?v=_HLoH_PgrLk by Lars George. It is really good one! I just have one thing still cannot understand. It said Tall is good for Scan, Wide ...
    Tianying ChangTianying Chang
    Jan 22, 2014 at 6:10 pm
    Jan 22, 2014 at 11:15 pm
  • Sorry for duplicating the thread, I didn't subscribe to the hbase mail list. Continuing from this thread ...
    Fernando Iwamoto - PlannejFernando Iwamoto - Plannej
    Jan 16, 2014 at 1:29 pm
    Jan 20, 2014 at 4:37 pm
  • Hi all, I was wondering if Get is implemented as a private case of scan ? In HRegion, I see that the get passed is used to construct a Scan object for the RegionScanner to use. I was wondering if ...
    Amit SelaAmit Sela
    Jan 15, 2014 at 1:34 pm
    Jan 16, 2014 at 9:30 pm
  • Hello, our cluster is running Hadoop 1.2.1 and HBase 0.94.11. Now we wanna upgrade the cluster to the newest version, in particular Hadoop 2.2.0 and HBase 0.96.1.1. How is the best approach to do ...
    Timo SchaepeTimo Schaepe
    Jan 31, 2014 at 3:47 pm
    Feb 1, 2014 at 4:20 pm
  • Something like count 't1', {INTERVAL= 20} should give me every 20th row in table 't1'. Is there an easy way to get a random sample via. the shell using filters?
    Sudarshan Kadambi (BLOOMBERG/ 731 LEXIN)Sudarshan Kadambi (BLOOMBERG/ 731 LEXIN)
    Jan 24, 2014 at 11:15 pm
    Jan 25, 2014 at 5:14 pm
  • Hi, I am strugling with setting up an HBase on top of HDFS running with High Availability mode. Can some point me to right direction? Thaks al lot for hints -- View this message in context ...
    JakskyJaksky
    Jan 21, 2014 at 4:23 pm
    Jan 23, 2014 at 4:06 pm
  • Hi All, In the blog describing the coprocessor there was sequence diagram walking through the lifecycle of a Get. https://blogs.apache.org/hbase/mediaresource/60b135e5-04c6-4197-b262-e7cd08de784b I'm ...
    Pradeep GollakotaPradeep Gollakota
    Jan 22, 2014 at 12:32 am
    Jan 22, 2014 at 1:20 am
  • Hi Folks We have a table with fixed pattern row key design, the format for the row key is YEAR_COUNTRY_randomNumber, for example: 20140101_EN_1 20140101_EN_2 20140101_EN_3 20140101_US_1 20140101_US_2 ...
    Ramon WangRamon Wang
    Jan 15, 2014 at 6:16 am
    Jan 17, 2014 at 11:01 am
  • Hi All, I read following section talking about ACL for group in HBase book "roles" internally in HBase to begin with. We instead allow group names to be granted permissions, which allows external ...
    TakeshiTakeshi
    Jan 9, 2014 at 4:00 am
    Jan 17, 2014 at 6:24 am
  • We use hbase-0.94.10 and encounter corrupt hfile. 2014-01-11 23:24:16,547 DEBUG org.apache.hadoop.hbase.util.FSUtils: Creating ...
    宾莉金宾莉金
    Jan 15, 2014 at 3:37 am
    Jan 15, 2014 at 5:27 am
  • hi all, I want to use hbase to store all urls for a distributed crawler. there is a central scheduler to schedule all unCrawled urls by priority. Following is my design of rowkey and common data ...
    Li LiLi Li
    Jan 9, 2014 at 10:42 am
    Jan 13, 2014 at 7:26 am
  • Hi all, I want to study in depth HBase, I have seen many times HBase The Definitive Guide, and have some experience. But I think it is not enough to understand HBase. I decided to spend six months to ...
    Kun yanKun yan
    Jan 9, 2014 at 2:31 am
    Jan 10, 2014 at 6:41 pm
  • Hi, In my MR job, I need to write output into multiple tables, So I am using MultiTableOutputFormat as below. But I am getting TableNotFoundException. I am attaching code snippet below, Is this the ...
    AnilKumar BAnilKumar B
    Jan 7, 2014 at 3:12 am
    Jan 7, 2014 at 4:41 am
  • Hi, after a few rounds of spidering with nutch (2.2.1) hbase (0.90.6) is constantly crashing with this error message below. I tried quite a lot already to change but no success. Any idea what I could ...
    Law-Firms-In.comLaw-Firms-In.com
    Jan 2, 2014 at 3:28 pm
    Jan 2, 2014 at 7:03 pm
  • Hi, I have set up hbase in pseudo distributed mode. I keep on getting below exceptions in data node log. Is it a problem ? ( Hadoop version - 1.1.2 , Hbase version - 0.94.7 ) Please help ...
    Vimal JainVimal Jain
    Jan 31, 2014 at 11:31 am
    Feb 5, 2014 at 6:33 pm
  • Has anyone encountered this problem? Maybe a known issue or common mistake? I'm executing a Pig script that uses hbase storage. It's a 3-node cluster (0.94.7) and I'm executing the script from the ...
    YouknowwhoYouknowwho
    Jan 29, 2014 at 3:58 am
    Feb 1, 2014 at 4:44 pm
  • Hi all, after 3 months in RC2 and 2 more months past that, I'm happy to announce that AsyncHBase 1.5.0 is now officially out. AsyncHBase remains true to its initial promise: the API is still backward ...
    TsunaTsuna
    Jan 24, 2014 at 10:29 pm
    Jan 29, 2014 at 11:27 pm
  • Hi all, I am looking for a way to test co-processors. Some thing similar to mrunit. is there a mock framework in hbase that I can use? thanks in advance. Sujee Maniyam (http://sujee.net)
    Sujee ManiyamSujee Maniyam
    Jan 29, 2014 at 6:24 am
    Jan 29, 2014 at 12:24 pm
  • To use the new hbase 0.96.1-hadoop2 for a client which dependency should I give in my pom.xml ? I have tried it for example with hbase-it and I get the following Exception: 14/01/28 16:30:18 INFO ...
    ShapoorShapoor
    Jan 28, 2014 at 3:48 pm
    Jan 28, 2014 at 5:43 pm
  • Hi, When I run the "user_permission" command on a table, I get this error: hbase(main):010:0 create 'foo','bar' 0 row(s) in 0.5780 seconds = Hbase::Table - foo hbase(main):011:0 user_permission 'foo' ...
    Alex NastetskyAlex Nastetsky
    Jan 27, 2014 at 8:59 pm
    Jan 27, 2014 at 10:03 pm
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116 users for January 2014

Ted Yu: 102 posts Lars hofhansl: 25 posts Michael Stack: 22 posts Jean-Marc Spaggiari: 20 posts Li Li: 16 posts Amit Sela: 13 posts Fernando Iwamoto - Plannej: 12 posts Tianying Chang: 12 posts Haosong Huang: 11 posts James Taylor: 11 posts LEI Xiaofeng: 11 posts Vladimir Rodionov: 11 posts Henning Blohm: 8 posts Leiwangouc: 8 posts Rohit Dev: 8 posts Varun Sharma: 8 posts Asaf Mesika: 7 posts Dhaval Shah: 7 posts Ramkrishna vasudevan: 7 posts Rural Hunter: 7 posts
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