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92 discussions - 483 posts

  • Good morning -- I had a question, we have had a datanode go down, and its been down for few days, however hbase is trying to talk to that dead datanode still 2014-02-13 08:57:23,073 WARN ...
    Jack LevinJack Levin
    Feb 13, 2014 at 6:39 pm
    Feb 28, 2014 at 6:39 am
  • According to http://hbase.apache.org/book/hbase.accesscontrol.configuration.html#d2566e5780, the Enable/Disable operation is controlled by the Admin permission. However, it seems to be controlled ...
    Alex NastetskyAlex Nastetsky
    Feb 25, 2014 at 8:13 pm
    Feb 27, 2014 at 4:59 pm
  • Hi folks, We are trying to setup HBase cluster for the following requirement: We have to maintain data of size around 800TB, For the above requirement,please suggest me the best hardware ...
    Suresh babuSuresh babu
    Feb 4, 2014 at 5:33 pm
    Feb 12, 2014 at 2:25 am
  • Hi All, We have been experiencing severe data loss issues from few hours. There are some wierd things going on in the cluster. We were unable to locate the data even in hdfs Hbase version 0.94.1 Here ...
    Feb 27, 2014 at 3:54 pm
    Mar 2, 2014 at 10:17 am
  • hello, is there a difference in initializing Javaclient for hbase compared to 0.94 ? Configuration hadoopConf = HBaseConfiguration.create(); hadoopConf.set("hbase.zookeeper.quorum", ...
    Feb 24, 2014 at 1:28 pm
    Feb 25, 2014 at 5:37 pm
  • hello, I just got this exception from hbase- while sending too many read/write requests for a longer time. Should something be configured? 14/02/25 16:26:37 INFO client.AsyncProcess ...
    Feb 25, 2014 at 4:17 pm
    Feb 27, 2014 at 1:23 am
  • I am using hbase version 0.92.4 on a 5 node cluster. I am seeing that a particular region server often crashes. A status 'simple' on hbase shell gives the following stats HBase Shell; enter ...
    Rohit KelkarRohit Kelkar
    Feb 14, 2014 at 11:52 pm
    Feb 15, 2014 at 3:55 am
  • I have to use hbase and have mix type of data Some of them have size 1-4K(Mail- Header....) and others And also we need only random access: any data Is HBase is feasible for storing this type of data ...
    Upendra YadavUpendra Yadav
    Feb 25, 2014 at 7:25 am
    Feb 27, 2014 at 12:30 pm
  • Hi We are planning to implement caching mechanism for our Hbase data model for that we have to remove the *LRU (least recently used) records* from the cached table. Is there any way by which we can ...
    Vikram Singh ChandelVikram Singh Chandel
    Feb 24, 2014 at 11:22 am
    Feb 27, 2014 at 7:21 am
  • 1. One region server can have more than one region for same table 2. Which one is correct: a) Each region has one memstore( and all CF for this region will reside in this single memstore) and if ...
    Upendra YadavUpendra Yadav
    Feb 24, 2014 at 7:35 pm
    Feb 26, 2014 at 6:45 pm
  • Hi, We are having a problem with BulkDelete. It appears that it doesn't erase the desired documents. Then I move to hbase shell and run delete all <table_name , <row id and still it didn't remove the ...
    Feb 19, 2014 at 3:06 pm
    Feb 23, 2014 at 7:10 pm
  • Hi I have some tests that check client behaviour during a controlled HBase restart. Everything works as expected and the client is able to recover after a while. However, after doing the same tests ...
    Kristoffer SjögrenKristoffer Sjögren
    Feb 12, 2014 at 8:42 am
    Feb 14, 2014 at 9:20 am
  • Hi, I'd like to perform a put but have it succeed only if certain conditions based on values of some columns are met. I am on 0.94.6 my first option was: write a prePut() Observer, perform the checks ...
    Aa aAa a
    Feb 7, 2014 at 7:02 pm
    Feb 8, 2014 at 4:43 am
  • I have also doubt over WAL(write ahead log). In hdfs we can write a new file or we can append to old file. Is that correct : 1. WAL only logs operations not its data... just like disk ...
    Upendra YadavUpendra Yadav
    Feb 25, 2014 at 6:01 pm
    Feb 25, 2014 at 6:29 pm
  • Is hbase call delete request for old hfile(storeFile) file if minor/major compaction happen for them and generate new hfile and store it in hdfs. for minor compaction how it will get size of every ...
    Upendra YadavUpendra Yadav
    Feb 25, 2014 at 7:08 am
    Feb 25, 2014 at 5:46 pm
  • Hi, I'm trying to write a custom filter that is to be used (in my use case) in a FilterList. Because I ran into something I do not understand I reduced the code to the absolute minimal and posted it ...
    Niels BasjesNiels Basjes
    Feb 3, 2014 at 5:31 pm
    Feb 24, 2014 at 2:31 pm
  • Hi The requirement is to get the hbase table size (using API) and have to save this size for each table in a metadata table . i tried hdfs command to check table size but need api method (if ...
    Vikram Singh ChandelVikram Singh Chandel
    Feb 10, 2014 at 12:31 pm
    Feb 19, 2014 at 9:06 am
  • On execution of ./hbase shell i am getting below error... This is new hdfs-hbase installation... [sas@]$ ./hbase shell 2014-02-18 20:34:36,531 INFO [main] ...
    Upendra YadavUpendra Yadav
    Feb 18, 2014 at 3:06 pm
    Feb 19, 2014 at 6:58 am
  • Hi, I have Hbase and Hadoop setup in pseudo distributed mode in production. Now i am planning to move from pseudo distributed mode to fully distributed mode ( 2 node cluster). My existing Hbase and ...
    Vimal JainVimal Jain
    Feb 14, 2014 at 7:34 am
    Feb 15, 2014 at 1:14 pm
  • How can I create table with pre-splitting for 10 region with policy (KeyPrefixRegionSplitPolicy) From the "hbase shell" and how I can specify the prefix length for the key prefix with the hbase shell.
    Mohamed GharebMohamed Ghareb
    Feb 13, 2014 at 4:44 pm
    Feb 13, 2014 at 6:00 pm
  • Hi all,<br/ Is there any API to read server side properties which are set in hbase-site.xml..?? I did not get any information in the net.<br/ <br/ Thanks and regards<br/ Vinay kashyap
    Vinay KashyapVinay Kashyap
    Feb 11, 2014 at 10:11 am
    Feb 12, 2014 at 6:01 pm
  • Hi, I have read that hbase keep a MemStore per each CF. When one of them reaches the flush threshold, it flushes all MemStore. Is that true in version 0.94.6? Also, is this new hStoreFile is ...
    Feb 12, 2014 at 6:41 pm
    Feb 13, 2014 at 5:02 pm
  • Hi, folks I want to try the WALPlayer. But it complains not found. Am I running it the wrong way? Thanks Tian-Ying hadoop jar /tmp/hbase-0.94.17-SNAPSHOT.jar WALPlayer Unknown program 'WALPlayer' ...
    Tianying ChangTianying Chang
    Feb 7, 2014 at 5:53 am
    Feb 11, 2014 at 8:01 pm
  • I just downloaded the HBase 0.98-hadoop2. After I run "start-hbase.sh", the Hbase does not actually start. I tried to search online but failed to find a solution. Please help. The message in master ...
    S. ZhouS. Zhou
    Feb 26, 2014 at 12:30 am
    Feb 26, 2014 at 6:54 pm
  • Hi, how to get record if comma is the part of rowkey I have data like : hbase(main):020:0 scan 'StudentScoreCard' ROW COLUMN+CELL 1,BCA column=marks:Bio, timestamp=1392896198268, value=86 And now ...
    Upendra YadavUpendra Yadav
    Feb 20, 2014 at 12:05 pm
    Feb 20, 2014 at 12:28 pm
  • I know that time to live it delete the cell content after the TTL date setting when major compaction accured If I need make setting TTL to live forever. How I do that
    Mohamed GharebMohamed Ghareb
    Feb 17, 2014 at 5:51 pm
    Feb 18, 2014 at 2:43 pm
  • Hi, We have HBase 0.94.7 deployed in production with 54 Region Servers (Hadoop 1). Couple of days ago, we had an incident which made our system unusable for several hours. HBase started emitting WARN ...
    Asaf MesikaAsaf Mesika
    Feb 10, 2014 at 8:26 am
    Apr 29, 2014 at 7:46 pm
  • Hi, Which one of the storage structure does hbase uses ? Is it LSM tree , SSTable or fractal tree ? -- Thanks and Regards, Vimal Jain
    Vimal JainVimal Jain
    Feb 28, 2014 at 1:36 pm
    Feb 28, 2014 at 4:32 pm
  • I have go through no. of documents/slides about HBase read/get operation... But I have lot of broken links and question to clear view about how hbase read operation happen... Like.... Client ...
    Upendra YadavUpendra Yadav
    Feb 25, 2014 at 7:03 pm
    Feb 25, 2014 at 7:55 pm
  • I recently saw some exceptions that I haven't seen in HBase before. The trace looks something like: Exception in thread "RpcServer.handler=96,port=60020" java.lang.StackOverflowError at ...
    Sudarshan Kadambi (BLOOMBERG/ 731 LEXIN)Sudarshan Kadambi (BLOOMBERG/ 731 LEXIN)
    Feb 25, 2014 at 3:22 pm
    Feb 25, 2014 at 5:04 pm
  • Hi, What happens if my block size is 32K while the cells are 50K. Do Hfile blocks round up to 50K or are values split across blocks ? Also how does this play with the block cache ? Thanks Varun
    Varun SharmaVarun Sharma
    Feb 24, 2014 at 5:51 pm
    Feb 24, 2014 at 11:16 pm
  • Hi, Where can i find latest Hbase documentation. On Hbase website , the documentation is for 0.94.6 and current stable version is 0.94.16.So i am guessing there are significant changes in latest ...
    Vimal JainVimal Jain
    Feb 20, 2014 at 6:39 am
    Feb 21, 2014 at 10:46 pm
  • Hi Guys We disabled the automatically major compaction setting in our HBase cluster, so we want to something which can tell us when should we do major compaction, we were thinking to use "num of ...
    Ramon WangRamon Wang
    Feb 21, 2014 at 9:50 am
    Feb 21, 2014 at 5:18 pm
  • Kindly when I create new tables with presplitting region, I need to use the firstrow & lastrow argument, my question if my key is number "integer" can I put start & end row with decimal number or I ...
    Mohamed GharebMohamed Ghareb
    Feb 17, 2014 at 11:29 am
    Feb 19, 2014 at 7:28 pm
  • hbase-0.98.0 is now available for download [0] from the Apache mirrors and its artifacts are available in the Apache Maven repository. Apache HBase is a scalable, distributed data store that runs ...
    Andrew PurtellAndrew Purtell
    Feb 17, 2014 at 1:49 am
    Feb 17, 2014 at 6:03 pm
  • Hi, We do a rpm based deploy to centos servers. HBase till 0.94 used to have a functional rpm spec and a rpm profile, but looks like it is gone from 0.96 onwards. Was this removed intentionally? Is ...
    Ishan ChhabraIshan Chhabra
    Feb 4, 2014 at 10:27 pm
    Feb 9, 2014 at 11:07 am
  • Hi hbase. In normal installations, Im wondering who should create hbase root.dir. 1) I have seen pseudo-distributed mode docs implying that Hbase is smart enough to do it by itself. "Let HBase create ...
    Jay VyasJay Vyas
    Feb 7, 2014 at 11:39 pm
    Feb 9, 2014 at 3:49 am
  • hi, folks, I am trying to put a row through REST API and linux command. I started REST server (using port 8500), and be able to create a table: create 't2_dn','cf1' And then, I used this command to ...
    Demai NiDemai Ni
    Feb 4, 2014 at 1:55 am
    Feb 5, 2014 at 2:12 am
  • Hi, Is ROOT table removed from Hbase 0.96 ? -- Thanks and Regards, Vimal Jain
    Vimal JainVimal Jain
    Feb 28, 2014 at 1:35 pm
    Feb 28, 2014 at 1:39 pm
  • We are running hbase 0.94.2 on hadoop 0.20 append version in production (yes we have plans to upgrade hadoop). Its a 5 node cluster and a 6th node running just the name node and hmaster. I am seeing ...
    Rohit KelkarRohit Kelkar
    Feb 26, 2014 at 6:56 pm
    Feb 27, 2014 at 4:38 pm
  • Jean, We have a product which is working on mysql and we are trying to move it on HBase to create multi-tenant database. I agree with you that because of nosql nature of database, we should ...
    Jignesh PatelJignesh Patel
    Feb 19, 2014 at 12:30 am
    Feb 20, 2014 at 1:51 am
  • Hi, I am researching a project to load data from MySQL into HBase. The data is our user data. We want to analyze the user data with its activities and tracking. The user data is big. The record count ...
    Feb 14, 2014 at 2:50 am
    Feb 14, 2014 at 5:00 pm
  • hi, folks, sorry for the simple question. I know that 96.0 is supporting namespace, it is the first time I played with it (on 0.96.0). I went to the source of all documents ...
    Demai NiDemai Ni
    Feb 13, 2014 at 1:23 am
    Feb 13, 2014 at 4:33 am
  • Hi, I reduced the MAX_FILE_SIZE to 64mb on an existing HBase table to force more regions. However, it seems that this limit is not respected by quite a large number of regions. I find several regions ...
    David KochDavid Koch
    Feb 10, 2014 at 11:03 pm
    Feb 12, 2014 at 10:25 am
  • Hi, Ted: Our environment is using a distribution from a Vendor, so it is not easy just to patch it myself. But I can seek the option to see if the vendor is willing to patch it in next release ...
    Feb 10, 2014 at 8:20 pm
    Feb 10, 2014 at 11:04 pm
  • Hello, Could somebody explain what the following metrics mean and how they can be used ? HlogSplitTime_num_ops HlogSplitSize_num_ops -- *Regards,* --- *Sreepathi *
    Feb 7, 2014 at 1:00 am
    Feb 7, 2014 at 6:12 pm
  • Dear all, I've introduced a new regionserver to my cluster. First, there was no rDNS solving names, so it was named with it IP address. Then i stop the rs, fixed rDNS and start it again, naming it ...
    Federico GauleFederico Gaule
    Feb 5, 2014 at 5:16 pm
    Feb 6, 2014 at 9:25 pm
  • Hi, I found some inconsistent behavior in the HBase, and wonder why. In the simple Put API call, if there is no content at all with this put, the local side of the client will throw ...
    Feb 24, 2014 at 1:25 am
    Feb 24, 2014 at 6:50 pm
  • hello everyone, i installed "hbase-" using "hadoop-2.2.0". The installation is in a Linux machine. I am however willing to access it from a windows client using java and eclipse. it ...
    Feb 21, 2014 at 7:00 pm
    Feb 24, 2014 at 5:21 am
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104 users for February 2014

Ted Yu: 100 posts Jean-Marc Spaggiari: 30 posts Upendra Yadav: 26 posts Lars hofhansl: 20 posts Michael Stack: 19 posts Jack Levin: 14 posts Shapoor: 13 posts Alex Nastetsky: 12 posts Vimal Jain: 12 posts Vikram Singh Chandel: 11 posts Vladimir Rodionov: 11 posts Mohamed Ghareb: 9 posts Java8964: 7 posts Rohit Kelkar: 7 posts Demai Ni: 6 posts Kiran: 6 posts Ameet c: 5 posts Andrew Purtell: 5 posts Bharath Vissapragada: 5 posts Harsh J: 5 posts
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