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99 discussions - 578 posts

  • Hi we are using 7nodes HBase configuration + 1 master. Each node/master have 8GB of memory with 4core cpu. One master is used for hadoop and also as hbase master. Also, 7 nodes are shared for hadoop ...
    Zaharije PasalicZaharije Pasalic
    Jan 18, 2010 at 4:47 pm
    Jan 25, 2010 at 10:13 pm
  • I know I am doing something really dumb, so apologies in advance. All I want to do is to read a table sequentially. I tried several versions of this, but nothing gives me the "value of the Key". I am ...
    Something SomethingSomething Something
    Jan 12, 2010 at 5:12 pm
    Jan 14, 2010 at 6:59 pm
  • Hello, I understand running HBase on a single box is kind of pointless (thanks Andrew Purtell for the reply about numbers of boxes)... but I was wondering what kind of box might one need to host/run ...
    Otis GospodneticOtis Gospodnetic
    Jan 15, 2010 at 8:55 pm
    Feb 7, 2010 at 1:16 am
  • Hi, We are using coldfusion as our server-side coding language which is built on java. We have written a java class to simplify the coldfusion coding by providing simple classes to insert data into ...
    Seraph ImaliaSeraph Imalia
    Jan 15, 2010 at 9:34 am
    Jan 20, 2010 at 8:03 pm
  • Hi, I set up a new Hbase cluster and am seeing an error I haven't seen before. When I start up Hbase I have this NodeExists error in the zookeeper log: ...
    Adam SilbersteinAdam Silberstein
    Jan 13, 2010 at 7:26 pm
    Jan 17, 2010 at 9:18 pm
  • Hi, I have been working on an abstraction layer for HBase that I hope HBase users will find helpful. Highlights include: * A dialect of SQL for HBase (usable in the console, scripts, and code) * JDBC ...
    Paul AmbrosePaul Ambrose
    Jan 5, 2010 at 8:49 pm
    Jan 7, 2010 at 7:44 pm
  • Hi, We're building an analytics server with HBase using Jetty. I have experimented with the Thrift API + PHP over the past few days and got it working, but needed the filter functionality which has ...
    Chris BatesChris Bates
    Jan 20, 2010 at 8:13 pm
    Jan 23, 2010 at 7:41 pm
  • hello, list, I am now setting up a HBase cluster using HBase version 0.20.2. But I have met some problems which I googled a lot and got no answer. Please help me. I modified the Hbase-site.xml and ...
    Steven zhuangSteven zhuang
    Jan 12, 2010 at 2:17 pm
    Jan 17, 2010 at 1:11 am
  • Currently my application uses C# with MONO on Linux to communicate to local file systems (e.g. ext2, ext3). The basic operations are open a file, write/read from file and close/delete the file. For ...
    Jan 10, 2010 at 7:50 am
    Jan 11, 2010 at 6:56 pm
  • Hello, I am having issues of regionservers shutting down because the underlying DFS is having trouble. I cannot get the DFS to function properly. I attached a log of our regionserver below. At first ...
    Jan 20, 2010 at 4:23 pm
    Jun 14, 2010 at 3:41 pm
  • I have Hbase.env set to manage Zookeeper. When I try to start hbase, the zookeeper out says java.io.IOException: Could not find my address: localhost in list of ZooKeeper quorum servers at ...
    Ananth T. SarathyAnanth T. Sarathy
    Jan 13, 2010 at 5:44 pm
    Jan 13, 2010 at 9:18 pm
  • I need to store live data which is about 40-50K records /sec, evaluated MYSql and now trying HBase. Just read in docstoc that HBase insert performance, for few 1000 rows and 10 columns with 1 MB ...
    Gaurav VashishthGaurav Vashishth
    Jan 18, 2010 at 10:14 am
    Feb 12, 2010 at 5:59 pm
  • If I set # of reduce tasks to 1 using setNumReduceTasks(1), would the class be instantiated only on one machine.. always? I mean if I have a cluster of say 1 master, 10 workers & 3 zookeepers, is the ...
    Something SomethingSomething Something
    Jan 25, 2010 at 11:23 pm
    Jan 30, 2010 at 4:59 pm
  • I have noticed some strange performance numbers on EC2. If someone can give me some hints to improve performance that would be greatly appreciated. Here are the details: I have a process that runs a ...
    Something SomethingSomething Something
    Jan 26, 2010 at 4:48 pm
    Jan 29, 2010 at 2:35 am
  • Jonathan: Since you implemented https://issues.apache.org/jira/si/jira.issueviews:issue-html/HBASE-48/HBASE-48.html, maybe you can point me to some document how bulk load is used ? I found ...
    Ted YuTed Yu
    Jan 14, 2010 at 12:31 am
    Jan 21, 2010 at 9:38 pm
  • I'm struggling with a problem that seems to manifest only after I load a fair amount of data. I run a few map/reduce jobs and load about 80M rows successfully. Then I start another process to load ...
    Marc LimotteMarc Limotte
    Jan 6, 2010 at 12:06 am
    Jan 9, 2010 at 1:11 am
  • I apologize if I am breaking some kind of list etiquette, but I've been struggling for the last week, and I have no idea where to ask for help. I got HBase to work on my virtual Ubuntu machine, but ...
    Pavel GutinPavel Gutin
    Jan 29, 2010 at 5:18 pm
    Jan 29, 2010 at 8:53 pm
  • Hi, I was wondering about the atomicity guarantees when using secondary indexes from within a transaction. From what I could gather, updates to the index table goes through its own (set of) rpc ...
    Mridul MuralidharanMridul Muralidharan
    Jan 3, 2010 at 6:47 pm
    Jan 20, 2010 at 2:32 am
  • Hi all! I'm in the middle of some performance and stability testing of out small hbase cluster to check if it suitable for out application. We want to use it as web cache persistence layer for out ...
    Michał PodsiadłowskiMichał Podsiadłowski
    Jan 29, 2010 at 1:01 pm
    Feb 3, 2010 at 4:15 pm
  • Hi all, I'm trying to do an AND operation and I'm not sure if I did the filtering correctly because HBase is hanging on me. What I want is this: I have two qualifiers, theme and IP, to my column ...
    Chris BatesChris Bates
    Jan 24, 2010 at 3:50 am
    Jan 27, 2010 at 8:28 pm
  • Hi all, My requirement is that , I must read two tables (belonging to the same region server) in the same Map . Normally TableMap supports only 1 table at a time and right now I am reading the entire ...
    John smithJohn smith
    Jan 8, 2010 at 3:51 am
    Jan 11, 2010 at 4:46 pm
  • Hello, If I import data into HBase, can I still run a hand-written MapReduce job over that data in HDFS? That is, not using TableInputFormat to read the data back out via HBase. Similarly, can one ...
    Otis GospodneticOtis Gospodnetic
    Jan 14, 2010 at 4:06 am
    Jan 14, 2010 at 4:17 pm
  • Hi, There are 2 region servers(2G memory), 5 data nodes in my cluster. I want to test HBase reading performance by writing a program with Hbase client. Inside that codes, I was using secondary index ...
    Jan 4, 2010 at 9:43 am
    Jan 7, 2010 at 7:13 pm
  • Hi, I'm new to hadoop and hbase. I was wondering if could tell me if hbase can be easily integrated with Karmasphere for Hadoop. My application is classification of unstructured text files. Thanks ...
    Jan 26, 2010 at 1:07 am
    Feb 1, 2010 at 6:29 pm
  • Hi, I'm using the Cloudera distribution of HBase, version 0.20.0~1-1.cloudera, in a fully-distributed cluster of 10 nodes. I'm using all default config options except for hbase.zookeeper.quorum, ...
    James BaldassariJames Baldassari
    Jan 27, 2010 at 5:03 am
    Jan 27, 2010 at 10:52 pm
  • Hi, i'm pretty interested in learning hbase. what i want to do is store financial data for analytical/graphing/displaying purposes. there hundreds of millions of rows and of course, i want fast ...
    Jan 21, 2010 at 3:12 am
    Jan 22, 2010 at 1:15 pm
  • Hi, There are two tables table1,table2 in my cluster. table1 with two column family, 40 qualifier, 147 regions table1 with two column family, 34 qualifier, 77 regions In no cache situation, 4 region ...
    Jan 20, 2010 at 9:13 am
    Jan 21, 2010 at 9:07 pm
  • Hi, I want to understand clearly about Hbase as Map/Reduce source. Basicly, if a table with 100 regions, it means 100 map will be started, right? What's the difference between hdfs and hbase as a ...
    Jan 29, 2010 at 1:03 am
    Jan 29, 2010 at 6:16 am
  • Hi, I¹m seeing behavior on 0.20.2 and 0.20.3 that doesn¹t seem quite right and would like to know if this is by design, a bug, or something I¹m doing wrong. Background: When I do a put that includes ...
    Rod CopeRod Cope
    Jan 26, 2010 at 5:36 pm
    Jan 27, 2010 at 2:31 am
  • Hi, I don't understand very clearly about the table region split. If I have 10 million rows,1000MB data size, in a table, how many region will it split? Thank you Fleming Chiu(邱宏明) 707-6128 ...
    Jan 11, 2010 at 8:34 am
    Jan 12, 2010 at 7:40 pm
  • Hi, Suppose I want to add a new region server to my instance. I imagine I need to add it to the list in the conf files for Hbase and Hadoop, and then stop/start the cluster. Is there any way to add ...
    Mridul MuralidharanMridul Muralidharan
    Jan 8, 2010 at 7:50 pm
    Jan 8, 2010 at 9:10 pm
  • Hi all, This year's first San Francisco HBase User Group meetup takes place on January 27th at StumbleUpon. The first talk will be about the upcoming versions, others to be announced. RSVP at: ...
    Jean-Daniel CryansJean-Daniel Cryans
    Jan 6, 2010 at 6:43 pm
    Jan 8, 2010 at 6:48 am
  • Hi,all. I tried to modify the rowkey in a reduce,the operation looks like as follows: void reduce(ImmutableBytesWritable oldKey, Iterable<Text values,Context context) { context.write(oldKey, new ...
    Johnson hongJohnson hong
    Jan 6, 2010 at 4:02 am
    Jan 6, 2010 at 6:52 am
  • I was able to get a Java based client up using Hbase which seems to work just fine, but when I stuck a JDO layer on top via DataNucleus, I got some weird behavior during update. It seemed liked I ...
    Jan 27, 2010 at 10:37 pm
    Feb 4, 2010 at 12:39 am
  • Hi guys, Is there a way to get the rowcount of the table from java API .. I looked at HTable and HTableDesc... but I couldn't find it .. It is similar to "count <tablename " frm Hbase shell. Thanks ...
    John smithJohn smith
    Jan 28, 2010 at 6:32 am
    Jan 29, 2010 at 1:38 am
  • Hi, At various places I have read that row writes are atomic. However, from a curious look at the code of the put method in HRegion.java, it seems like the updates of a put operation are written to ...
    Bruno DumonBruno Dumon
    Jan 26, 2010 at 9:43 am
    Jan 27, 2010 at 12:46 am
  • Hi, I'm trying to bulk load my data into HBase via the new "HFileOutputFormat", in which I use a Mapper to read from a file and construct a KeyValue. Then I use the KeyValueSortReducer as Reducer, ...
    Menno LuitenMenno Luiten
    Jan 21, 2010 at 5:49 pm
    Jan 21, 2010 at 9:35 pm
  • In order to store the high volume live data, I was thinking of designing the table structure and two options came into my mind 1. Can we forcefully set the range in which region server will operate? ...
    Gaurav VashishthGaurav Vashishth
    Jan 20, 2010 at 9:44 am
    Jan 20, 2010 at 4:36 pm
  • Hi we are having small Hadoop cluster environment with 7 nodes (8GB ram/8cores each node) + 1 master and on same nodes we deployed HBase (7 nodes). Currrenlty we are importing ~50milion records from ...
    Jan 18, 2010 at 11:54 am
    Jan 18, 2010 at 5:53 pm
  • I have two problems when I use hbase 0.20.2. I used several machines to make a cluster and deployed hadoop and hbase on them. I followed the "Getting Started" and installed Hbase 0.20.2. I could ...
    Jan 13, 2010 at 12:33 pm
    Jan 14, 2010 at 7:28 pm
  • Is there any consideration for HBql to implement /support drivers that provide HBase w/ an ODBC API capability?. We don't yet know if/how/when we can potentially connect our legacy data tools ...
    Ben CottonBen Cotton
    Jan 11, 2010 at 11:01 am
    Jan 12, 2010 at 6:06 pm
  • Hello Hbase users, I am not sure if this is a hbase or hadoop question, but to answer you probably need to understand both so trying this list ;) I have a system with a table that stores e.g. user ...
    TuX RaceRTuX RaceR
    Jan 4, 2010 at 5:41 pm
    Jan 5, 2010 at 3:23 pm
  • Hello, I am wondering if there is a way of removing *incomplete* indexes after I stopped the process of building them in the middle; if I try to remove it I get NullPointerException, as the index is ...
    Adrian PopescuAdrian Popescu
    Jan 29, 2010 at 8:31 pm
    Feb 4, 2010 at 10:14 pm
  • Hello all, I'm trying to solve the problem of performing operations on a HTransactionalTable under the context of a long-duration transaction. My problem is that I won't know what machines will be ...
    Chad HardinChad Hardin
    Jan 28, 2010 at 8:21 pm
    Jan 29, 2010 at 5:15 pm
  • Hi, I'm trying out the RESTful front end for Hbase. When I try to do cell store with command line CURL, the data successfully stored but error message shown as the following: [...] ...
    Reggie LaiReggie Lai
    Jan 27, 2010 at 11:29 am
    Jan 28, 2010 at 5:06 am
  • Hi, We have recently switched to HBase 0.20.2 (with a new thrift version from trunk) and noticed a strange behaviour when retriving rows with given timestamp. When trying to retrieve a row with e.g. ...
    Peter FalkPeter Falk
    Jan 25, 2010 at 12:49 pm
    Jan 25, 2010 at 2:48 pm
  • We're seeing some dangerously inconsistent behaviour in retrieving data from HBase. In particular circumstances whose conditions are still unclear, get and scan (without timestamp params) are ...
    Joost OuwerkerkJoost Ouwerkerk
    Jan 22, 2010 at 3:57 pm
    Jan 23, 2010 at 12:15 am
  • Hallo, my question is more on the architecture side of my program. *General view:* I have a huge HBase table containing thousands of rows. Each row contains an ID of a node and its geographical ...
    Xine JarXine Jar
    Jan 14, 2010 at 6:08 pm
    Jan 18, 2010 at 11:21 am
  • Hi, We use hbase-0.20.1 I have seen this randomly fail with a ConcurrentModificationException: HBaseAdmin admin = new HBaseAdmin(hbaseConf); Has anybody else seen this behavior ? Thanks
    Ted YuTed Yu
    Jan 15, 2010 at 6:23 pm
    Jan 15, 2010 at 11:34 pm
  • I've been doing a lot of research over the past few days, but haven't been able to find out whether or not hadoop will work for what i am trying to achieve. The data I have is initially in XML, and ...
    Jan 14, 2010 at 6:04 pm
    Jan 14, 2010 at 10:13 pm
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96 users for January 2010

Stack: 103 posts Jean-Daniel Cryans: 66 posts Andrew Purtell: 31 posts Y_823910: 28 posts Sriram Muthuswamy Chittathoor: 26 posts Ryan Rawson: 18 posts Mridul Muralidharan: 15 posts Chris Bates: 14 posts Something Something: 13 posts Dan Washusen: 12 posts Dmitriy Lyfar: 12 posts Otis Gospodnetic: 12 posts Paul Ambrose: 9 posts Seraph Imalia: 8 posts Adam Silberstein: 7 posts Ananth T. Sarathy: 7 posts Gaurav Vashishth: 7 posts Steven zhuang: 7 posts Ted Yu: 7 posts UsefullyWastedIce: 7 posts
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