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153 discussions - 785 posts

  • Hi everyone I'm starting with hbase and testing for our needs. I have set up a hadoop cluster of Three machines and A Hbase cluster atop on the same three machines, one master two slaves. I am ...
    Nick maillardNick maillard
    Oct 23, 2012 at 3:55 pm
    Oct 26, 2012 at 4:09 am
  • We have 6 region server given 10G of memory for hbase. Each region server has an average of about 100 regions and across the cluster we are averaging about 100 requests / second with a pretty even ...
    Jeff WhitingJeff Whiting
    Oct 29, 2012 at 10:56 pm
    Nov 5, 2012 at 7:50 pm
  • Hi, We are planning to experiment with a cluster for serving production traffic using hbase for pinterest. We are starting off with a 10 region server + 1 master cluster on Amazon EMR version 0.92. I ...
    Varun SharmaVarun Sharma
    Oct 30, 2012 at 5:41 pm
    Nov 1, 2012 at 7:21 pm
  • Hi, I am running a MR job with 40 simultaneous mappers, each of which does puts to HBase. I have ganged up the puts into groups of 1000 (this seems to help quite a bit) and also made sure that the ...
    Jonathan BishopJonathan Bishop
    Oct 12, 2012 at 12:08 am
    Oct 15, 2012 at 5:23 pm
  • Hi All, I am using HBase 0.92.1. I have created a secondary index on table "A". Table A stores immutable data. I build the secondary table "B" using a prePut RegionObserver. The secondary index is ...
    Anil guptaAnil gupta
    Oct 24, 2012 at 9:41 pm
    Oct 27, 2012 at 12:36 am
  • Hi, When I'm trying to run RowCounter, I'm getting the error below., 12/10/11 13:09:58 INFO mapred.JobClient: Task Id : attempt_201209151131_0022_m_000013_0, Status : FAILED ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Oct 11, 2012 at 5:27 pm
    Oct 11, 2012 at 10:18 pm
  • Hi, Can someone please help me to understand the pros and cons between those 2 options for the following usecase? I need to transfer all the rows between 2 timestamps to another table. My first idea ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Oct 18, 2012 at 12:11 am
    Oct 25, 2012 at 8:43 pm
  • I would suggest that you use your coprocessor to copy the data to a 'backup' table when you mark them for delete. Then as major compaction hits, the rows are deleted from the main table, but still ...
    Michael SegelMichael Segel
    Oct 21, 2012 at 11:34 pm
    Oct 23, 2012 at 10:02 pm
  • Hi All, I would like to add a RegionObserver to a HBase table through HBase api. I don't want to put this RegionObserver as a user or system co-processor in hbase-site.xml since this is specific to a ...
    Anil guptaAnil gupta
    Oct 16, 2012 at 10:35 pm
    Oct 19, 2012 at 4:08 pm
  • Hello, We are seeing slow times for read operations in our experiments. We are hoping that you guys can help us figure out what's going wrong. Here are some details: - We are running a read-only ...
    Yousuf AhmadYousuf Ahmad
    Oct 18, 2012 at 6:27 pm
    Nov 20, 2012 at 8:49 pm
  • Hi All, I use hbase 0.92 and I am trying to add a column family to hbase table and I get the below error. ERROR: org.apache.hadoop.hbase.TableNotDisabledException ...
    Oct 30, 2012 at 2:30 pm
    Oct 30, 2012 at 6:51 pm
  • Is this related to HBASE-6757 ? I use a filter list with - prefix filter - filter list of column filters /zahoor
    J Mohamed ZahoorJ Mohamed Zahoor
    Oct 15, 2012 at 5:27 pm
    Oct 18, 2012 at 7:46 am
  • Hi all, i have now a big problem with one region. This region is allways in transition and i don't no how fix it. I run "hbase hbck -repair" and this ended with: INFO util.HBaseFsckRepair: Region ...
    Lukáš DrbalLukáš Drbal
    Oct 15, 2012 at 12:39 pm
    Oct 15, 2012 at 4:31 pm
  • Hi, I'm thinking about my firs MapReduce class and I have some questions. The goal of it will be to move some rows from one table to another one based on the timestamp only. Since this is pretty new ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Oct 27, 2012 at 8:31 pm
    Nov 14, 2012 at 8:52 am
  • Good morning, I have a 10 node Hadoop/Hbase cluster, plus a namenode VM, plus three Zookeeper quorum peers (one on the namenode, one on a dedicated ZK peer VM, and one on a third box). All 10 HDFS ...
    Dan BrodskyDan Brodsky
    Oct 17, 2012 at 1:02 pm
    Nov 3, 2012 at 5:01 pm
  • Hi all, Is it possible to select distinct value from Hbase table. Example :- what is the equivalant code for the below Oracle code in Hbase ? Select count (distinct deptno) from emp ; Regards ...
    Raviprasad TRaviprasad T
    Oct 10, 2012 at 10:59 am
    Oct 11, 2012 at 10:56 am
  • Hi, Has anyone attempted using Lucene instead of HFiles (see https://twitter.com/otisg/status/254047978174701568 )? Is that a completely crazy, bad, would-never-work, ...
    Otis GospodneticOtis Gospodnetic
    Oct 5, 2012 at 3:35 am
    Oct 6, 2012 at 2:42 am
  • Hi everyone Continuing on my journey in Hadoop world. I have installed: Hive 0.9 on Hbase 0.94.2 cluster atop an Hadoop 1.0.3 cluster. When I do simply query like "select *" everything is fine. When ...
    Nick maillardNick maillard
    Oct 25, 2012 at 2:53 pm
    Oct 25, 2012 at 4:28 pm
  • Hi, All, I want to find internal code in hbase where physical deleting a record occurs. -some of my understanding. Correct me if I am wrong. (It is largely based on my experience and even ...
    Yun pengYun peng
    Oct 17, 2012 at 12:24 pm
    Oct 20, 2012 at 5:51 am
  • Hi all, Is there a way to check if major compaction is running or not on a table. -- Thank you Kiran Sarvabhotla -----Even a correct decision is wrong when it is taken late
    Oct 18, 2012 at 6:13 am
    Oct 19, 2012 at 4:12 pm
  • Hi Lars, To install it, can we just remove the .jar on the root directory and replace it with this one? I'm running 0.94.0 so it might be compatible, right? Thanks, JM 2012/10/12, lars hofhansl ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Oct 15, 2012 at 5:07 pm
    Oct 19, 2012 at 6:17 am
  • Hi, I'm having difficulty with a mapreduce job that has reducers that read from and write to HBase, version 0.92.1, r1298924. Row sizes vary greatly. As do the number of cells, although the number of ...
    Greg RossGreg Ross
    Oct 1, 2012 at 8:39 pm
    Oct 2, 2012 at 5:38 pm
  • Hi guys, I'm trying to get familiarized with HBase and one thing I noticed is that reads seem to very slow. I just tried doing a "scan 'my_table'" to get 120K records and it took about 50 seconds to ...
    Juan P.Juan P.
    Oct 1, 2012 at 11:01 pm
    Oct 2, 2012 at 2:05 pm
  • Hi, I am trying to use SingleColumnValueFilter to find only those rows which have a particular column which is empty. Not sure what to use for the value (4th arg in const). It does not take null, and ...
    Jonathan BishopJonathan Bishop
    Oct 31, 2012 at 9:49 pm
    Nov 1, 2012 at 6:30 pm
  • What version of hbase were you using ? Did you pre split the table before loading ? Thanks
    Oct 29, 2012 at 4:31 am
    Oct 30, 2012 at 8:06 am
  • Hi, Is there a way to delete all rows older than a certain date? In the delete object we can specify a timestamp but we have to specify a row too. I can still do a MR job and delete all row older ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Oct 13, 2012 at 11:26 pm
    Oct 25, 2012 at 1:58 pm
  • Hi, hbase-users. To get a start-key and end-key from each region, I implemented simple code like this. HTable table = new HTable(admin.getConf(), admin.getTableName()); NavigableMap<HRegionInfo, ...
    Henry JunYoung KIMHenry JunYoung KIM
    Oct 19, 2012 at 8:43 am
    Oct 23, 2012 at 4:34 am
  • I disable this table ivytest_deu , drop it .Error occurs. ERROR: java.io.IOException: java.io.IOException: HTableDescriptor missing for ivytest_deu at ...
    唐 颖唐 颖
    Oct 16, 2012 at 7:53 am
    Oct 17, 2012 at 3:56 am
  • Hi, Is there a way to force the number of map tasks in a MR? I have a 25 regions table splitted over 6 nodes. But the MR is running the tasks only 2 by 2. Is there a way to force it to run one task ...
    Jean-Marc SpaggiariJean-Marc Spaggiari
    Oct 11, 2012 at 8:00 pm
    Oct 12, 2012 at 1:45 am
  • Hi, I'm doing some experiments with HBase 0.92 and Hadoop 1.0.1. We have a small cluster with dual core machines with 8 GB of RAM. The cluster has: 1 node running a NameNode and HBase master; 1 node ...
    Ricardo VilaçaRicardo Vilaça
    Oct 10, 2012 at 12:52 pm
    Nov 21, 2012 at 6:55 pm
  • Hi Dalia, Which getSum() method are you talking about? Please be specific. Thanks, Anil Gupta -- Thanks & Regards, Anil Gupta
    Anil guptaAnil gupta
    Oct 14, 2012 at 8:05 pm
    Oct 15, 2012 at 3:49 pm
  • We need to do deletes pretty regularly and sometimes we could have hundreds of millions of cells to delete. TTLs won't work for us because we have a fair amount of bizlogic around the deletes. Given ...
    Paul MacklesPaul Mackles
    Oct 5, 2012 at 6:18 pm
    Oct 12, 2012 at 9:42 pm
  • Hello all at this mailing list, I'm glad to finally announce an HBase addon that I have been working on. HAcid is a client library that enables HBase applications to execute ACID transactions with ...
    de Souza Medeiros Andrede Souza Medeiros Andre
    Oct 1, 2012 at 11:13 pm
    Oct 2, 2012 at 2:49 pm
  • I've set hbase.client.scanner.timeout.period on my client to 300000, but I'm still getting errors showing that hbase is using the default value of 60000. Any ideas why this is? Thanks.
    Bai ShenBai Shen
    Oct 18, 2012 at 3:25 pm
    Oct 22, 2012 at 7:34 pm
  • I have a HBase Java client which has a couple of filters and just work fine, I get the expected result. Here is the code: HTable table = new HTable(conf, "apachelogs"); Scan scan = new Scan() ...
    Kumar, SureshKumar, Suresh
    Oct 18, 2012 at 6:03 pm
    Oct 19, 2012 at 6:43 pm
  • Hi All, I have been using HBase 0.94.1 with Hadoop 0.23.1. I had the complete setup in a pseudo-distributed mode, and was running fine. Today I had to reset and reformat the namenode and clear all ...
    Pankaj MisraPankaj Misra
    Oct 17, 2012 at 3:35 pm
    Oct 17, 2012 at 10:40 pm
  • Hi Anil We also do a lot of stuff with coprocessors MasterObservers, RegionObservers and WALObservers. Just start your master and RS in debug mode and connect remotely from eclipse. This should be ...
    Oct 15, 2012 at 5:04 am
    Oct 17, 2012 at 4:10 am
  • hi i have a question about key & column design. in my application we have 3,000,000,000 record in every day each record contain : user-id, "time stamp", content(max 1KB). we need to store records for ...
    Yutoo yanioYutoo yanio
    Oct 10, 2012 at 3:25 pm
    Oct 11, 2012 at 9:12 am
  • I just have 5 stress client threads writing timeseries data. What I see is after few mts HBaseClient slows down and starts to take 4 secs. Once I kill the client and restart it stays at sustainable ...
    Mohit AnchliaMohit Anchlia
    Oct 9, 2012 at 5:27 pm
    Oct 10, 2012 at 9:13 am
  • Hi, Our usecase is as follows: We have time series data continuously flowing into the system and has to be stored in HBase. Subscriber Mobile Number (a.k.a MSISDN) is the primary identifier based on ...
    Karthikeyan MuthukumarasamyKarthikeyan Muthukumarasamy
    Oct 3, 2012 at 1:28 pm
    Oct 5, 2012 at 4:54 am
  • Hi, Is column qualifier physically stored in a Cell? Or pointer to it? Do we need to care about long size such as my_very_long_qualifier:1 (size of a value is small in comparison to size of ...
    Fuad EfendiFuad Efendi
    Oct 1, 2012 at 1:50 pm
    Oct 3, 2012 at 2:59 pm
  • The following command didn't run any test: mvn -PlocalTests -Dtest=*TestZookeeper *test N: Do you know why ?
    Ted YuTed Yu
    Oct 30, 2012 at 4:51 am
    Nov 2, 2012 at 2:07 am
  • Hi I am facing a scanner exception like this when i run a mr job. Both the input and output are hbase tables (different tables)… This comes sporadically on some mapper and all other mappers runs ...
    J Mohamed ZahoorJ Mohamed Zahoor
    Oct 22, 2012 at 3:47 pm
    Oct 23, 2012 at 6:51 am
  • I need to scale an internal service / datastore that is currently hosted on an HBase cluster and wanted to ask for advice from anyone out there who may have some to share. The service does simple key ...
    Dave LathamDave Latham
    Oct 19, 2012 at 11:32 pm
    Oct 22, 2012 at 11:38 pm
  • Hi, All, I am trying to understand how and when hbase set the modification timestamp for hfiles. My original intention is to get a timestamp when a hfile is generated (when last write to a hfile in ...
    Yun pengYun peng
    Oct 20, 2012 at 8:36 pm
    Oct 21, 2012 at 11:04 am
  • Hopefully this is a fun question. :) Assume you could architect an HBase table from scratch and you were choosing between the following two key structures. 1) The first structure creates a unique row ...
    Neil YalowitzNeil Yalowitz
    Oct 16, 2012 at 9:54 pm
    Oct 20, 2012 at 12:29 am
  • Hi, In my preput coprocessor I would like to get the old value of the row been input. Now I am creating a HTable instance and using the get interface; function wise it works fine. Given the row is ...
    Wei TanWei Tan
    Oct 9, 2012 at 8:36 pm
    Oct 11, 2012 at 5:52 pm
  • hi, hbase users. I am wondering how we can make orders when we put under multiple threads. I mean that threads are working like this thread1 puts A1 (rowkey) thread2 puts A2 thread3 puts A3 by ...
    Oct 4, 2012 at 3:12 pm
    Oct 5, 2012 at 10:59 am
  • Hi guys, I've been reading up on bulk load using MapReduce jobs and I wanted to validate something. If I the input I wanted to load into HBase produced the same key for several lines. How will HBase ...
    Juan P.Juan P.
    Oct 3, 2012 at 7:35 pm
    Oct 4, 2012 at 4:25 am
  • Hello, I am designing a HBase table for users and hope to get some suggestions for my row key design. Thanks... This user table will have columns which include user information such as names, ...
    Jason HuangJason Huang
    Oct 2, 2012 at 2:28 pm
    Oct 3, 2012 at 12:31 pm
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149 users for October 2012

Ramkrishna.S.Vasudevan: 45 posts Jean-Marc Spaggiari: 44 posts Anil gupta: 36 posts Lars hofhansl: 30 posts Michel Segel: 28 posts Kevin O'dell: 26 posts Anoop Sam John: 25 posts Michael Stack: 25 posts Doug Meil: 22 posts Nick maillard: 20 posts Jean-Daniel Cryans: 19 posts Jonathan Bishop: 15 posts Yun peng: 14 posts Pankaj Misra: 12 posts Andrew Purtell: 11 posts Jerry Lam: 11 posts Jmozah: 11 posts Marcos Ortiz Valmaseda: 11 posts Mohit Anchlia: 10 posts Ted Yu: 10 posts
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