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99 discussions - 529 posts

  • Hi, I apologise if this has been asked a million times, but after some searching I'm still not sure if this is a good idea. I've got my local (currently standalone) server running, Thrift bindings ...
    Brian O'KennedyBrian O'Kennedy
    Oct 29, 2010 at 9:11 am
    Nov 2, 2010 at 5:19 pm
  • Hi, Recently I have spent some efforts to try to understand the mechanisms of HBase to exploit possible performance tunning options. And many thanks to the folks who helped with my questions in this ...
    William KangWilliam Kang
    Oct 19, 2010 at 2:49 am
    Nov 2, 2010 at 4:32 pm
  • Hi folks, We are about upgrade our cluster to 0.89 and are testing some data loss scenarios. I'd like to ask a few questions to clarify the behavior in cases of outages of one or more regionservers. ...
    George P. StathisGeorge P. Stathis
    Oct 18, 2010 at 5:16 pm
    Oct 22, 2010 at 5:53 pm
  • We are testing with 4 nodes HBase cluster out of which 3 machines are identical with 64GB RAM and 6x1TB disks. and 4th machine has only 16GB RAM and 2x1TB disks We observe (from server side metrics) ...
    Abhijit PolAbhijit Pol
    Oct 9, 2010 at 8:15 pm
    Oct 17, 2010 at 7:59 am
  • Hi all, We have a testing cluster of 6 nodes which we try to run an HBase/MapReduce application on. In order to simulate a power failure we kill -9ed all things hadoop related on one of the slave ...
    Erdem AgaogluErdem Agaoglu
    Oct 28, 2010 at 7:59 am
    Nov 8, 2010 at 4:11 pm
  • Hi, Now I realize that most everyone is sitting in NY, while some of us can't leave our respective cities.... Came across this problem and I was wondering how others solved it. Suppose you have a ...
    Michael SegelMichael Segel
    Oct 12, 2010 at 12:36 pm
    Oct 13, 2010 at 6:25 am
  • Hello, I would like to increase the max cell size in one of my Hbase tables. Just got an error msg when trying to insert something about 12 Meg in size that said KeyValue size too large I presume ...
    Taylor, Ronald CTaylor, Ronald C
    Oct 3, 2010 at 5:31 am
    Oct 4, 2010 at 4:40 am
  • Ok, I am not running any fsck right now, but my namenode log file gets flooded with: 2010-10-22 13:05:35,695 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem.audit: ugi=null ip=null cmd=open ...
    Jack LevinJack Levin
    Oct 22, 2010 at 8:08 pm
    Oct 26, 2010 at 6:58 am
  • Hi folks, I have a question about the scheme design for Hbase. In general, should I prefer to have more column families with less column family qualifiers or should I prefer to have less column ...
    Weliam CloudWeliam Cloud
    Oct 10, 2010 at 1:42 am
    Oct 14, 2010 at 5:55 pm
  • I've a mapreduce job that is taking too long..over an hour..Trying to see what can a tune to to bring it down..One thing I noticed, the job is kicking off - 500+ map tasks : 490 of them do not ...
    Oct 6, 2010 at 2:12 am
    Oct 6, 2010 at 5:27 pm
  • Hi, I am using HBaseTestingUtility for doing some integration tests and its being successful in developer machines and not mention extremely helpful. But we are facing problem when running the test ...
    Imran M YousufImran M Yousuf
    Oct 7, 2010 at 5:04 am
    Oct 8, 2010 at 5:51 am
  • Hi, We've been having a strange problem with our HBase cluster recently (0.20.5 + HBASE-2599 + IHBase-0.20.5). Everything will be working fine, doing mostly gets at 5-10k/sec and an hourly bulk ...
    James BaldassariJames Baldassari
    Oct 4, 2010 at 3:06 am
    Oct 6, 2010 at 6:30 pm
  • Hello, I cannot find any information about secure user access to an hbase database. I want to create an hbase database but want to allow only certain users to access it. Currently, anyone can access, ...
    Oct 1, 2010 at 12:05 pm
    Oct 5, 2010 at 8:17 pm
  • We want to investigate HBase bulk imports, as described on http://hbase.apache.org/docs/r0.89.20100726/bulk-loads.html and and/or JIRA HBASE-48. I can't seem to run either the importtsv tool or the ...
    Leo AlekseyevLeo Alekseyev
    Oct 8, 2010 at 11:52 pm
    Oct 23, 2010 at 5:45 am
  • Hi all, I run my performance testing in random read, but I got the hfile.block.cache.size = 0 performance is better than default, Is it possible? My cluster (4 nodes): Hadoop 0.20.2, HBase 0.20.6 1 * ...
    Oct 21, 2010 at 3:19 am
    Oct 21, 2010 at 4:48 pm
  • Hi, I have implemented an auto increment feature/tool and would like your comments (or criticism) on how it could be improved. Before going into the details I would like to give pointers to the ...
    Imran M YousufImran M Yousuf
    Oct 19, 2010 at 1:24 pm
    Oct 20, 2010 at 5:25 am
  • please see: http://pastebin.com/4PrUstmy What is the right course of action to resolve this? -Jack
    Jack LevinJack Levin
    Oct 18, 2010 at 4:36 am
    Oct 19, 2010 at 5:26 am
  • Hi, We are currently doing a POC for HBase in our system. We have written a bulk upload job to upload our data from a text file into HBase. We are using a 3-node cluster, one master which also works ...
    Hari ShankarHari Shankar
    Oct 29, 2010 at 6:56 am
    Nov 23, 2010 at 11:17 pm
  • Hi all, I've done a bit of search on this issue, and have yet to find anything conclusive. As a test case to demonstrate it, I am using HBase 0.20.6 and stargate. I have a test HBase cluster with 1 ...
    Jeremy HinegardnerJeremy Hinegardner
    Oct 20, 2010 at 12:03 am
    Oct 25, 2010 at 6:06 pm
  • Google mentioned that it uses Bigtable to serve map-tiles, which basically means it uses Bigtable to serve huge amount of data online, but it does not mention any caching layer. But we all know ...
    Sean BigdatafunSean Bigdatafun
    Oct 15, 2010 at 12:32 am
    Oct 19, 2010 at 2:33 am
  • Hi, I used Configuration cfg = new Configuration(); cfg.addResource(InputStream) on org.apache.hadoop.conf.Configuration to create hadoop configuration. That configuration is used to construct ...
    Henning BlohmHenning Blohm
    Oct 13, 2010 at 2:09 pm
    Oct 14, 2010 at 8:34 am
  • Hi folks, I have a general question about Hbase. Can we pick which region server we want to save a particular row? The reason I am asking this is because sometimes we want to manually balance region ...
    William KangWilliam Kang
    Oct 6, 2010 at 3:06 am
    Oct 7, 2010 at 2:52 am
  • I've recently had a region server suicide, and am not able to recover from it. I've tried completely stopping the entire cluster and restarting it (including dfs and zk), but the master refuses to ...
    Matthew LeMieuxMatthew LeMieux
    Oct 3, 2010 at 5:56 pm
    Oct 3, 2010 at 8:45 pm
  • We recently had a problem where one of our machines in the cluster had a time that was 6 hours behind the other ones (ntp was supposed to be setup on that machine but wasn't). We subsequently ...
    Jeff WhitingJeff Whiting
    Oct 28, 2010 at 4:57 pm
    Oct 31, 2010 at 6:48 pm
  • Dear HBase devs, I am reading the HBase sources and have also read the http://wiki.apache.org/hadoop/Hbase/HowToContribute wiki page including the jira "noob" label suggestion. If I do not have 4 or ...
    Oct 26, 2010 at 10:01 pm
    Oct 27, 2010 at 1:19 pm
  • I have 30 region servers, after cold restart (master, zookepeers, and all regionservers), 22 regionservers start, but the other 8 have following errors, any idea how to debug this? Is zookeeper ...
    Jack LevinJack Levin
    Oct 22, 2010 at 3:35 pm
    Oct 22, 2010 at 11:22 pm
  • If I have base64 encoded binary files in hbase columns, is it possible to instruct the regionserver to decode it to binary and give it back to me in binary format? I am interesting it reading via ...
    Jack LevinJack Levin
    Oct 16, 2010 at 8:51 pm
    Oct 18, 2010 at 11:26 pm
  • Hey datamigos, I'm having trouble getting a finicky .20.6 cluster to behave. The Master, Zookeeper, and ReigonServers all seem to be happy -- except the Master doesn't see any RSs. Doing a "status" ...
    Bradford StephensBradford Stephens
    Oct 26, 2010 at 7:07 am
    Oct 28, 2010 at 4:24 am
  • I am trying to split a 20G regionfile, and getting timeouts see below: 2010-10-22 08:41:44,851 INFO org.apache.hadoop.hbase.regionserver.SplitTransaction: Starting split of region ...
    Jack LevinJack Levin
    Oct 22, 2010 at 3:47 pm
    Oct 22, 2010 at 7:32 pm
  • Hello, does anyone have hbase_hive handler working for 0.89 Hbase version? We only have 0.20.6 handler working well, but not 0.89. Thanks. -Jack
    Jack LevinJack Levin
    Oct 21, 2010 at 3:55 am
    Oct 21, 2010 at 7:03 pm
  • HBase was seamless for first couple of weeks..now all kinds of issues in production :) fun fun.. Curious ..does this property have to match up on "hbase client side" & region server side.. I've this ...
    Oct 11, 2010 at 6:36 pm
    Oct 15, 2010 at 9:39 pm
  • I was setting up HBase, and found it was trying to listent on But my PCs IP is SO how to setup this with hbase? Because of this, i am not able to lunch HBase master. Can ...
    Clement JebakumarClement Jebakumar
    Oct 13, 2010 at 5:51 pm
    Oct 15, 2010 at 6:06 pm
  • Hi all, I am in a hurry to finish a report about whether or not we should host our data in HBase. After many readings and diggings, there still are some questions I cannot find answers. Sorry for ...
    William KangWilliam Kang
    Oct 14, 2010 at 5:54 pm
    Oct 14, 2010 at 7:45 pm
  • Hi all, We are about to setup a new installation using the following machines, and CDH3 beta 3: - 10 nodes of single quad core, 8GB memory, 2x500GB SATA - 3 nodes of dual quad core, 24GB memory, ...
    Tim RobertsonTim Robertson
    Oct 14, 2010 at 8:52 am
    Oct 14, 2010 at 6:18 pm
  • Hello here, I have a question regarding HBase data locality in respect to HDFS data nodes. As far as I understand regions created by region servers will happen to be physically created on local Data ...
    yuliya Feldmanyuliya Feldman
    Oct 8, 2010 at 1:42 am
    Oct 8, 2010 at 10:42 pm
  • Hi guys, Is there any project going on co-processing on region servers? Right now, we have to transfer all data from region servers to region client after query, is that right? This can be slow. ...
    William KangWilliam Kang
    Oct 6, 2010 at 3:25 am
    Oct 7, 2010 at 6:08 am
  • Hi, is it possible to tell regionservers not to die/stop when namenode is restarted? Every onces in a while I need to restart namenode, and it causes all regionservers pretty much to shutdown, and in ...
    Jack LevinJack Levin
    Oct 6, 2010 at 5:45 am
    Oct 6, 2010 at 7:05 am
  • 2010-10-04 17:47:25,449 DEBUG org.apache.hadoop.hbase.master.RegionManager: Server(s) are carrying only 2 regions. Server mtab5.prod.imageshack.com,60020,1285878100774 is most loaded (290). Shedding ...
    Jack LevinJack Levin
    Oct 5, 2010 at 12:49 am
    Oct 5, 2010 at 6:27 am
  • Hi I have written a small program to connect to hbase but it stuck half way and just go in the wait state. *Here is the code * System.out.println("Start"); HBaseConfiguration config = new ...
    Shuja RehmanShuja Rehman
    Oct 28, 2010 at 9:11 pm
    Nov 2, 2010 at 8:01 am
  • Hey, We're just looking into ways to run multiple instances/versions of HBase for testing/development and were wondering how other people have gone about doing this. If we used just one hadoop ...
    Dan HarveyDan Harvey
    Oct 20, 2010 at 9:10 am
    Oct 29, 2010 at 5:36 pm
  • We want to start benchmarking the mutliget feature (HTable.batch). However, I don't see it in the latest 0.89 :( Is this something that we need to test against the trunk? Thanks. i.
    Igor RanitovicIgor Ranitovic
    Oct 26, 2010 at 7:57 pm
    Oct 26, 2010 at 9:10 pm
  • On our test cluster I did a reset of the hdfs and hbase services (using stop/start-dfs and stop/start-hase) earlier today, and from everything I know how to check HDFS and HBase have come up ...
    Adam PhelpsAdam Phelps
    Oct 19, 2010 at 1:03 am
    Oct 22, 2010 at 9:06 pm
  • I am attempting to run some Hadoop jobs that perform HBase puts from the mapper, but they are failing to connect to my HBase instance. When I instantiate HTable from the setup method in my mapper, it ...
    Marchwiak, Patrick D.Marchwiak, Patrick D.
    Oct 15, 2010 at 10:39 pm
    Oct 16, 2010 at 12:36 am
  • Hi all, Since HBase has bulk import, could hbase delete a whole region ? Currently I have to do a scan operation then get the row id and invoke delete operation for each row id, this inefficiency. ...
    Jeff ZhangJeff Zhang
    Oct 13, 2010 at 1:26 pm
    Oct 14, 2010 at 4:24 am
  • William: Coprocessors will be committed to TRUNK sometime in the next few days. They are well documented. I suggest you start with this package-info.html posted to hbase-2001 by Andrew and Mingjie: ...
    Oct 7, 2010 at 6:32 pm
    Oct 10, 2010 at 10:27 pm
  • I'm running into a bizarre issue with Thrift and Zookeeper. I'm using it from Ruby, and Hbase throws be an IOError each time. Here's what the log says: 2010-10-07 19:42:05,056 INFO ...
    Aditya bhargavaAditya bhargava
    Oct 8, 2010 at 6:31 am
    Oct 9, 2010 at 9:43 pm
  • http://pastebin.com/3fwiSkTF I kept getting this exception for a region until I restarted the affected server, any ideas why master did not reassign it? -Jack
    Jack LevinJack Levin
    Oct 5, 2010 at 2:36 am
    Oct 5, 2010 at 4:39 am
  • Hello, How does the client`s cache of "region-location"( .META table), get invalidated when a region-server splits regions ? Does Zookeeper abort the client session or inform it of staleness ? How is ...
    Naresh RapoluNaresh Rapolu
    Oct 2, 2010 at 12:36 am
    Oct 4, 2010 at 8:36 pm
  • Hi Folks I am wondering if anyone has the answer of this question. I am processing log files using Map reduce and get data to put some part into mysql and rest of hbase. At the moment, i am running ...
    Shuja RehmanShuja Rehman
    Oct 27, 2010 at 8:45 pm
    Oct 27, 2010 at 9:17 pm
  • 2010-10-21 10:08:14,268 WARN org.apache.hadoop.hbase.util.FSUtils: Waited 2014334ms for lease recovery on ...
    Jack LevinJack Levin
    Oct 21, 2010 at 5:11 pm
    Oct 21, 2010 at 5:56 pm
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85 users for October 2010

Stack: 65 posts Jack Levin: 49 posts Jean-Daniel Cryans: 48 posts Ryan Rawson: 30 posts William Kang: 23 posts Jonathan Gray: 20 posts Sean Bigdatafun: 19 posts Andrew Purtell: 17 posts Venkatesh: 16 posts Imran M Yousuf: 14 posts Michael Segel: 12 posts George P. Stathis: 10 posts Matthew LeMieux: 10 posts Abhijit Pol: 8 posts Shuja Rehman: 8 posts Taylor, Ronald C: 8 posts James Baldassari: 7 posts Jian Lu: 7 posts Tao Xie: 7 posts Andrey Stepachev: 6 posts
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