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121 discussions - 556 posts

  • Say we have a use case that has sequential row keys and we have rows 0-100. Let's assume that 100 rows = the split size. Now when there is a split it will split at the halfway mark so there will be ...
    Nov 20, 2011 at 7:33 pm
    Nov 23, 2011 at 5:19 pm
  • Hi all, I am evaluating HBase Multiple master utility as I require that funtionality. I used a simple 4 machine hbase cluster with M1 as master. Now I started the Hmaster in M4 as well. I could see ...
    Nov 1, 2011 at 7:28 am
    Nov 3, 2011 at 10:47 pm
  • Hi Currently I am understading Hbase MapReduce support. I followed http://hbase.apache.org/book/mapreduce.example.html and executed it successfully. But I am not sure what changes to be done to MR ...
    Stuti AwasthiStuti Awasthi
    Nov 10, 2011 at 7:32 am
    Nov 21, 2011 at 7:55 pm
  • Hello, Previously, I assigned 5 servers as part of the zookeeper quorum. Everything works fine but I was hard coding these 5 servers everywhere and I was thinking of creating a dns entry called ...
    Nov 30, 2011 at 11:50 pm
    Dec 16, 2011 at 8:07 pm
  • Hello, We're doing a proof-of-concept study to see if HBase is a good fit for an application we're planning to build. The application will be recording a continuous stream of sensor data throughout ...
    Amit JainAmit Jain
    Nov 16, 2011 at 11:06 pm
    Nov 18, 2011 at 2:00 pm
  • Could anyone who has used Hbase in pseudo-distributed mode shere his/her hosts file???I am getting following error - Mon Nov 28 19:03:20 IST 2011 Starting master on ubuntu ulimit -n 32768 2011-11-28 ...
    Mohammad TariqMohammad Tariq
    Nov 28, 2011 at 1:38 pm
    Nov 30, 2011 at 12:08 am
  • HI all, My HBase cluster is 10 nodes, each node has 12core , 48G RAM, 24TB disk, 10GEthernet. My region size is 1GB. Any guidelines on how many regions can a RS handle comfortably? I vaguely remember ...
    Sujee ManiyamSujee Maniyam
    Nov 1, 2011 at 5:54 pm
    Nov 4, 2011 at 12:33 pm
  • Hi i am running hbase on 3 machines, on one node master and regionserver, on other two nodes regionservers. i ran bin/start-hbase.sh on master, all the hbase daemons running on master node(HMaster, ...
    Vamshi KrishnaVamshi Krishna
    Nov 26, 2011 at 6:38 am
    Dec 6, 2011 at 6:16 pm
  • Is it better to have many smaller tables are one larger table? For example if we wanted to store user action logs we could do either of the following: Multiple tables: - SearchLog - PageViewLog - ...
    Nov 18, 2011 at 9:30 pm
    Nov 21, 2011 at 5:11 pm
  • (I apologize for resending but I forgot to add the user list.) Hi all, It is my pleasure to announce the open source release of Omid, a project whose goal is to add lock-free transactional support on ...
    Daniel Gómez FerroDaniel Gómez Ferro
    Nov 4, 2011 at 11:25 am
    Nov 8, 2011 at 10:38 am
  • Hello there. When I want to get a row by rowid the answer is very slow (even 15 secs some times) What is wrong with my Htable ? Here is some examples to illustrate my problem: hbase(main):030:0 get ...
    Damien HardyDamien Hardy
    Nov 10, 2011 at 11:13 am
    Nov 15, 2011 at 8:49 am
  • Hi I would like to know if it is possible to retrieve the columns name and not the whole content of rows. The reason for such request is that the columns store high volumn of data (2K) each (and i ...
    Mikael SitrukMikael Sitruk
    Nov 28, 2011 at 4:55 pm
    Jan 19, 2012 at 2:19 pm
  • hi i am working with 2 node hbase cluster as shown below On node1 ( : master node, region server, hadoop namenode, hadoop datanode on node2 ( region server, hadoop datanode. When ...
    Vamshi KrishnaVamshi Krishna
    Nov 17, 2011 at 6:40 am
    Nov 29, 2011 at 6:32 am
  • We're using hbase-0.90.3 with thrift client, and have encountered some problems when we want to delete one specific version of a cell. First, there's no corresponding thrift api for ...
    Yi LiangYi Liang
    Nov 24, 2011 at 7:38 am
    Nov 29, 2011 at 4:37 am
  • hello, I read http://hbase.apache.org/book/versions.html and have a question about delete operation. As it mentions, the user can delete a whole row or delete a data version of cell. The delete ...
    Nov 26, 2011 at 6:14 am
    Nov 28, 2011 at 7:04 pm
  • Hi, i posted this question already on the cloudera list, but i didn't get a solution yet. So i want to ask here again. I am currently running Hadoop and HBase in pseudo-distributed mode using ...
    Christopher DornerChristopher Dorner
    Nov 24, 2011 at 10:10 am
    Nov 25, 2011 at 10:07 am
  • It's possible a release of 0.20.20X (X=5 I think) as Hadoop 1.0 is imminent. The Hadoop 1.0 release is an acknowledgement of reality -- 0.20 branch is in production at many places. I know we agreed ...
    Andrew PurtellAndrew Purtell
    Nov 16, 2011 at 11:50 pm
    Nov 17, 2011 at 9:07 am
  • Companies like Facebook and Stumble upon uses HBase for the day to day transaction. Since HBase and HDFS both are not going to support dynamic updates, how would they able to keep track of unique ...
    Jignesh PatelJignesh Patel
    Nov 7, 2011 at 3:30 pm
    Nov 7, 2011 at 4:36 pm
  • Hi, I am using Hbase 0.90.4 version and my Hadoop version is 0.20.203. I am getting the following exception in my HMaster logs when trying to start HBase: java.io.IOException: failed on local ...
    Nov 2, 2011 at 5:15 pm
    Nov 3, 2011 at 12:42 am
  • Hello, this has been already discussed a bit in the past, but I'm trying to refresh this thread as this is an important design issue in our HBase evaluation. Basically, the result of our evaluation ...
    Steinmaurer ThomasSteinmaurer Thomas
    Nov 28, 2011 at 9:57 am
    Dec 21, 2011 at 8:17 am
  • When HBase use HDFS system file. How do we set "dfs.replication.min"? who can share relevant experience? Currently on our environment, We use the default value: dfs.replication :3 ...
    Nov 26, 2011 at 6:47 am
    Nov 26, 2011 at 8:15 am
  • Hi, I tried to use MR RowCounter to count the rows of a table with specific column family. But it is not displaying correct result. Command (Only Table Name as argument ): ...
    Stuti AwasthiStuti Awasthi
    Nov 16, 2011 at 7:41 am
    Nov 18, 2011 at 4:46 pm
  • Hey guys, I am getting those errors after moving into 0.90.4: 2011-11-09 19:22:51,220 ERROR org.apache.hadoop.hbase.io.HbaseObjectWritable: Error in readFields java.io.EOFException at ...
    Jack LevinJack Levin
    Nov 10, 2011 at 3:24 am
    Nov 15, 2011 at 3:51 am
  • Hi all, i am running both hadoop and hbase with 2 machines. hadoop-0.20.2 and hbase-0.90.4. In one machine i am running hadoopnamenode and hbase master, in the other machine datanode ,regionserver. ...
    Vamshi KrishnaVamshi Krishna
    Nov 10, 2011 at 10:22 am
    Nov 13, 2011 at 5:48 pm
  • Hi I have a strange error in log of HBase (0.90.2) 2011-11-28 15:12:53,049 INFO org.apache.hadoop.hbase.regionserver.StoreFile$Reader: Loaded col bloom filter metadata for ...
    Mikael SitrukMikael Sitruk
    Nov 29, 2011 at 8:47 am
    Dec 1, 2011 at 12:49 am
  • I am trying to get hbase to run directly over s3n (much preferable) or s3 (less preferable). I ran into a few different problems that I solved(such as getting jets3t installed), but now i am stuck!! ...
    Mark CornerMark Corner
    Nov 27, 2011 at 10:23 pm
    Nov 28, 2011 at 5:49 am
  • This query is regarding the online_merge script from https://issues.apache.org/jira/browse/HBASE-1621 My setup is hbase - cdh3u1, hadoop-cdh3-u0. When I am running this script, I encounter the ...
    Nov 23, 2011 at 12:40 pm
    Nov 23, 2011 at 5:15 pm
  • I run HRegionServer whith program arguments that is start in eclipse. 2011-11-21 09:35:12,384 WARN [main] regionserver.HRegionServerCommandLine(56): Not starting a distinct region server because ...
    Nov 21, 2011 at 1:42 am
    Nov 23, 2011 at 1:45 am
  • Section 5.7.3 of the HBase book displays a scan operation: HTable htable = ... // instantiate HTable Scan scan = new Scan(); scan.addColumn(Bytes.toBytes("cf"),Bytes.toBytes("attr")); ...
    Nov 16, 2011 at 4:00 pm
    Nov 17, 2011 at 7:27 pm
  • Hi, we had a case today where the loadbalancer stopped working. (cloudera-cdh3-u1, 52nodes). Basically we had a hot region that we moved to another node. Shortly thereafter the regionserver of that ...
    Matthias HofschenMatthias Hofschen
    Nov 16, 2011 at 10:40 am
    Nov 16, 2011 at 4:10 pm
  • Hi all, I have a file in HDFS with "KeyValueTextInputFormat". I want to process this file through Map and put the output in Hbase. Input File : Key1 Val1 Key2 Val2 I am not sure which interfaces and ...
    Stuti AwasthiStuti Awasthi
    Nov 15, 2011 at 7:50 am
    Nov 15, 2011 at 9:49 am
  • I have three question: 1 How large a region will be, if i want to use map-reduce to analyze the data in hbase table. 2 How many region in a region server is suitable? 3 If the rowkey in my ...
    Nov 9, 2011 at 6:32 am
    Nov 10, 2011 at 5:42 am
  • Hello, I'm sorry for the non-technical posting here. Just letting you know, that I'm doing a "Firebird meets NoSQL (Apache HBase)" talk at the this year Firebird (RDBMS) Conference 2011 in Luxemburg. ...
    Steinmaurer ThomasSteinmaurer Thomas
    Nov 23, 2011 at 7:03 am
    Jan 2, 2012 at 7:40 am
  • Hi, i'm trying to connect eclipse with hbase on ubuntu, but i can't find any guide for do it. Some one can explain me how i can do it or link me a tutorial? Thanks. Silvia -- View this message in ...
    Nov 28, 2011 at 4:03 pm
    Dec 23, 2011 at 9:34 am
  • Before shutting down a regionserver should one flush the memstore or is this automatically handled? If not, how would one manually flush it? I also noticed the graceful_stop script but it appears not ...
    Nov 30, 2011 at 12:49 am
    Dec 7, 2011 at 6:33 pm
  • Hello, I want to get a hang on implementing a postPut co-processor. A simple test case is pretty much adding 1 to received cell values and store that into a second HBase table. I basically have this ...
    Steinmaurer ThomasSteinmaurer Thomas
    Nov 30, 2011 at 12:44 pm
    Dec 5, 2011 at 5:02 pm
  • Hi! I want to play with co-processors, but I can't find a packaged download for HBase 0.92 on the HBase website. There is just 0.90.3 and 0.90.4. I basically want to install 0.92 in a Ubuntu 11.04 ...
    Steinmaurer ThomasSteinmaurer Thomas
    Nov 29, 2011 at 9:01 am
    Nov 30, 2011 at 7:08 am
  • I set "hbase.hregion.max.filesize" to 9223372036854775807. When an average region size on HDFS reaches 6G, i split all the regions in my hbase table by using hbase java api HBaseAdmin.split. Before i ...
    Nov 22, 2011 at 3:33 am
    Nov 23, 2011 at 6:19 pm
  • I have an HBase schema design question that I wanted to discuss with the list. Let's say we have a "wide" table design that has a table with one column family containing "show bookings", say. RowKey: ...
    Suraj VarmaSuraj Varma
    Nov 18, 2011 at 5:34 pm
    Nov 20, 2011 at 9:52 am
  • Hi, i'm getting this error when trying to use the importtsv tool with hadoop- and hbase-0.92.0 hadoop jar ../../hbase-0.92.0-SNAPSHOT/hbase-0.92.0-SNAPSHOT.jar importtsv Exception in thread ...
    Denis KreisDenis Kreis
    Nov 17, 2011 at 8:23 pm
    Nov 17, 2011 at 10:08 pm
  • In the HBase book it states: " It is safe to set that number to the maximum number of incoming clients if their payload is small...." We have around 100 rails application servers so is this say its ...
    Nov 15, 2011 at 4:33 pm
    Nov 15, 2011 at 7:40 pm
  • Does HBase replicate blocks similar to how HDFS replicates for redundancy reasons? Where can this be configured or is it already managed by the hdfs-site.xml dfs.replication property? Thanks
    Nov 11, 2011 at 4:41 pm
    Nov 15, 2011 at 1:49 am
  • Hi everyone, i had a question about HBase. * Background: I'm working on analytics project and, so far, we are using MySQL as DBMS and Hadoop for data processing and aggregation. By now, we collect ...
    Samuel García MartínezSamuel García Martínez
    Nov 13, 2011 at 11:12 pm
    Nov 14, 2011 at 4:27 pm
  • Is it possible to get hbase statistics using, nc? Similar to zookeeper http://zookeeper.apache.org/doc/r3.1.2/zookeeperAdmin.html This would actually be a great feature for hbase. Any objections if I ...
    Nov 30, 2011 at 12:02 am
    Nov 30, 2011 at 2:11 pm
  • I want to set up Hadoop clusters. There are two workloads. One is log analysis which is using MapReduce to process big log files in HDFS. The other is HBase which is used to serve random table ...
    Jingguo yaoJingguo yao
    Nov 29, 2011 at 7:37 am
    Nov 30, 2011 at 8:05 am
  • Hi all, When I start hbase, message print, but under hadoop rootdir there are no hadoop-mapred*.jar:, hadoop-common*.jar, hadoop-hdfs*.jar. hadoop@hadoop-virtual-machine:/usr/local/hbase$ ...
    Jinyan XuJinyan Xu
    Nov 29, 2011 at 2:30 am
    Nov 29, 2011 at 8:33 pm
  • Hi, The Compression.Algorithm enum does not have "SNAPPY" as an option in Hbase 0.90.3 (the version I am on). How can I create a table with SNAPPY compression via code ? Is this possible ? ...
    Sam SeigalSam Seigal
    Nov 26, 2011 at 3:29 am
    Nov 26, 2011 at 3:55 am
  • If I run /etc/init.d/hadoop-hbase-master restart what would the expected behavior be? Are the region servers supposed to stay up until the master is back? Are they supposed to shutdown? What is ...
    Jeff WhitingJeff Whiting
    Nov 23, 2011 at 7:05 am
    Nov 24, 2011 at 4:03 pm
  • We have a hadoop cluster that is only running hbase. We recently installed ganglia to monitor those servers. Looking over the network graphs about every 2 hours there is a very large spike. Before ...
    Jeff WhitingJeff Whiting
    Nov 22, 2011 at 11:56 pm
    Nov 23, 2011 at 12:17 am
  • Hello, I am on CDH3 trying to perform bulk upload but following error occurs each time WARN mapred.LocalJobRunner: job_local_0001 java.lang.IllegalArgumentException: Can't read partitions file at ...
    Ales PenkavaAles Penkava
    Nov 22, 2011 at 6:42 pm
    Nov 22, 2011 at 7:20 pm
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124 users for November 2011

Jean-Daniel Cryans: 50 posts Stack: 32 posts Mark: 31 posts Doug Meil: 28 posts Lars hofhansl: 22 posts Stuti Awasthi: 20 posts Vamshi Krishna: 16 posts Jignesh Patel: 12 posts Lars George: 10 posts Suraj Varma: 10 posts Jahangir Mohammed: 9 posts Michel Segel: 9 posts Mikael Sitruk: 9 posts Mohammad Tariq: 9 posts Sam Seigal: 9 posts Ted Yu: 9 posts Denis Kreis: 8 posts Ramkrishna S Vasudevan: 8 posts Sujee Maniyam: 8 posts Daniel Gómez Ferro: 7 posts
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