Grokbase Groups HBase user June 2009

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73 discussions - 459 posts

  • Hi again, I need some help with a map/reduce program I have which copies data from one table to another. What I would like to do is iterate through an entire HBase table, and for a given row key and ...
    Jun 9, 2009 at 10:13 pm
    Jun 16, 2009 at 12:06 am
  • Hey rock stars, I'm having problems loading large amounts of data into a table (about 120 GB, 250million rows). My Map task runs fine, but when it comes to reducing, things start burning. 'top' ...
    Bradford StephensBradford Stephens
    Jun 9, 2009 at 5:22 pm
    Jun 13, 2009 at 12:05 am
  • Hey, I'm doing the following to get a scanner on a tall table: Scan linkScan = new Scan();. linkScan.addColumn(Bytes.toBytes("type"), Bytes.toBytes("ELECTRONICS")); ResultScanner scanner = ...
    Jun 26, 2009 at 7:47 pm
    Jun 30, 2009 at 4:48 pm
  • An alpha version of HBase 0.20.0 is available for download at: We are making this release available to preview what is coming in HBase 0.20.0. In ...
    Jun 17, 2009 at 5:23 am
    Jun 21, 2009 at 5:32 pm
  • Hey All, I've got HBase 0.20.0 Alpha installed and running. When i write a class, and try to run it, I get: 09/06/22 10:39:48 FATAL zookeeper.ZooKeeperWrapper: Fail to read properties from zoo.cfg ...
    Jun 22, 2009 at 5:45 pm
    Jun 24, 2009 at 6:17 pm
  • Hey all, getting started with map/reduce jobs. Figured I'd try the PerformanceEvaluation test program first. After adding HBase jar files to HADOOP_CLASSPATH in, I issue the following ...
    Jun 9, 2009 at 4:25 pm
    Jun 11, 2009 at 4:40 am
  • I'm doing an insert operation using the java API. When inserting data where the rowkey changes often, it seems the inserts go really slow. Is there another method for doing inserts of this type? ...
    Jun 6, 2009 at 11:55 pm
    Jun 8, 2009 at 5:23 pm
  • Hey there, So, I wiped my HDFS and reinstalled everything, and am running smaller loads... so far, so good. I've got 7 regionservers. My job basically takes a lot of documents and metadata with ...
    Bradford StephensBradford Stephens
    Jun 12, 2009 at 1:10 am
    Jun 16, 2009 at 9:43 am
  • Hi, I am repeatedly running into this issue where all the region servers tries to restart but fails to come up. All the region servers seems to be having same kind of exception which causes this ...
    Murali Krishna. PMurali Krishna. P
    Jun 28, 2009 at 3:30 pm
    Jun 30, 2009 at 6:56 pm
  • Hello, I have been looking at Jira and trying to get a current snapshot of the state of HA for HBase/Hadoop? I know that the zookeeper integration is the core of the HA story, but when is that slated ...
    Andrew WhartonAndrew Wharton
    Jun 1, 2009 at 2:59 pm
    Jun 19, 2009 at 6:51 pm
  • Hello, For my first try I will use windows as a non clustered system. I'm been trying to run it after the setting up of the JAVA_HOME env variable but when I run the following command *bin/hadoop jar ...
    Alexandre JaquetAlexandre Jaquet
    Jun 11, 2009 at 1:24 pm
    Jun 11, 2009 at 7:20 pm
  • Hi there, HBase access data only by key, right? Anybody use HBase + Katta(for secondary index)? Does it work? We just want to transfer part of our Oracle table data to HBase for multi parallel ...
    Jun 23, 2009 at 12:48 am
    Jun 23, 2009 at 9:37 am
  • Hi All, I am working on an application which is kind of a social network on mobile WAP. Recently, we have incorporated the files or attachments support in our application. Right now, since we are not ...
    Nitin GuptaNitin Gupta
    Jun 7, 2009 at 1:44 pm
    Jun 15, 2009 at 1:53 am
  • Hi, My HBase table has millions of rows; and on given column (ex. famliyA:labelB), only a couple of thousand rows really have values (sparse). Now my task is to find out the set of row keys whose ...
    Ric WangRic Wang
    Jun 9, 2009 at 9:21 pm
    Jun 10, 2009 at 8:04 pm
  • I am aware that inserting data into hbase with random timestamp order results indeterminate result. e.g. comments here I've personally ...
    Xinan WuXinan Wu
    Jun 16, 2009 at 7:49 pm
    Jun 16, 2009 at 8:59 pm
  • Hi all, I'm running HBase 0.19.3 with Hadoop 0.19.1 on a clusters of 2 machines operating Linux Ubuntu. Files are not being stored inside the /tmp folder. The problem that already occurred 3 times is ...
    Lucas Nazário dos SantosLucas Nazário dos Santos
    Jun 17, 2009 at 1:45 pm
    Jun 17, 2009 at 5:39 pm
  • Hello Everyone, I wanted to write a mr for hbase table.... there is a million record and i wanted to write a Map reduce task to scan through it and then get the data and find the 90the percentail of ...
    Jun 4, 2009 at 7:47 pm
    Jun 5, 2009 at 9:40 pm
  • Hi, I would like to know if anyone is using HBase for spatial databases. The requirements are relatively simple. 1. Two dimensions. 2. Each object represented as a point. 3. Basic query is nearest ...
    Fred ZappertFred Zappert
    Jun 19, 2009 at 7:22 pm
    Jun 21, 2009 at 12:52 am
  • Hi I am developing a MapReduce task which operates on a very big HBase table. Each time it is run across a relatively small subset of this table although. I have read that HBase stores the rows in an ...
    Piotr PraczykPiotr Praczyk
    Jun 12, 2009 at 1:13 pm
    Jun 15, 2009 at 9:27 am
  • sorry for the novel... I've been experiencing some problems with my hbase cluster and hoping someone can point me in the right direction. I have a 40 node cluster running 0.19.0. Each node has 4 ...
    Jeremy PinkhamJeremy Pinkham
    Jun 2, 2009 at 12:31 am
    Jun 2, 2009 at 7:39 pm
  • Hi there, I have a table "Table1" with one Family and 10 qualifier. Any ways that I can get these qualifier's name in Table1, then I can loop qualifier collection to fetch each qualifier's value. ...
    Jun 26, 2009 at 9:15 am
    Jul 7, 2009 at 3:34 am
  • Hi, We're considering HBase for a customer-facing SaaS. I saw some references to Master instance, and failure/failover scenarios on this list. We would be running this across at least two data ...
    Fred ZappertFred Zappert
    Jun 16, 2009 at 8:53 pm
    Jun 16, 2009 at 11:41 pm
  • Hi! I'm working on putting checkAndSave back into 0.20 and just want to check with the people that are using it how they are using it so that I can make it as good as possible for these users. Since ...
    Erik HolstadErik Holstad
    Jun 2, 2009 at 5:35 pm
    Jun 3, 2009 at 10:30 pm
  • I had about 30,000 rows in my table 'cached_parsedtext'. This morning when I checked, Hbase appeared to be down (master server web UI was not responding and the Shell crashed when I tried to count ...
    Mike andersonMike anderson
    Jun 18, 2009 at 4:11 pm
    Jun 19, 2009 at 1:13 am
  • In the NOSQL meetup slides the inserts and reads are really good, but the test is on single column and only 16bytes, I wonder how the numbers would be affected if the row grows to 1K bytes, even ...
    Ski Gh3Ski Gh3
    Jun 18, 2009 at 12:37 am
    Jun 18, 2009 at 1:09 am
  • Hi, I just download cloudera training virtual machine and tryed to run the sample I'm getting the following exception : training@training-vm:~/git/pristine-workspace/Hadoop/bin$ hadoop jar ...
    Alexandre JaquetAlexandre Jaquet
    Jun 12, 2009 at 3:47 pm
    Jun 12, 2009 at 4:49 pm
  • Hi, Very new to Hadoop and HBase. And sorry about the rudimentary question: I store my artifacts as rows in an HBase table, and the attributes of each artifact as labels within one single column ...
    Ric WangRic Wang
    Jun 9, 2009 at 6:56 pm
    Jun 11, 2009 at 8:10 am
  • I created a table with one column in my cluster and started putting data in to it I noticed that even with blockcache = false it still uses the block cache Is this a know problem or is there plans to ...
    Billy PearsonBilly Pearson
    Jun 5, 2009 at 6:25 am
    Jun 6, 2009 at 10:53 pm
  • My HBase 0.20 cluster is behind a firewall. When I try to connect to it from outside, I get the following error: 09/06/22 14:43:24 INFO ipc.HBaseClient: Retrying connect to server: / ...
    Amandeep KhuranaAmandeep Khurana
    Jun 23, 2009 at 12:04 am
    Jun 30, 2009 at 6:47 pm
  • Hi, just upgraded to hbase 20 alpha, it is refusing to start in distributed mode. Following is the exception coming from zookeeper 2009-06-24 03:14:48,005 WARN ...
    Murali krishnaMurali krishna
    Jun 24, 2009 at 11:02 am
    Jun 24, 2009 at 2:30 pm
  • I'm using HBase 0.19.3, and seeing some unusual behavior around ColumnValueFilter. When I do this... Scanner scanner = myTable.getScanner(COLUMN1, startKey); ...I get three results. But if I do... ...
    Jun 19, 2009 at 5:43 am
    Jun 24, 2009 at 6:01 am
  • Hi I want to use K-means algorithm for clustering of HBase row data with help of map reduce. I don't know it is possible or not. If anybody tried this thing then please help me. Thanks & Regards ...
    Puri, AseemPuri, Aseem
    Jun 16, 2009 at 4:16 am
    Jun 16, 2009 at 4:30 am
  • Hello list! I've spent the better part of the afternoon upgrading from 0.19.3 to trunk, and I did fall into a hole or two. Specifically, it turns out that we rely on DNS lookups to find out what ...
    Fredrik MöllerstrandFredrik Möllerstrand
    Jun 15, 2009 at 5:00 pm
    Jun 15, 2009 at 5:52 pm
  • Hi there, I had a hbase data lost couple of days ago due to the crash of HBase. At that time i asked on the list and was told that it may be due to the lost of META data on the master ( not flushed ...
    Yabo-Arber XuYabo-Arber Xu
    Jun 7, 2009 at 1:21 pm
    Jun 8, 2009 at 4:20 am
  • I'm trying to get some clarity on the role of versions in HBase. Our table design is such that a an object can have multiple property values for a given property name. For example, we could have an ...
    Ryan J. McDonoughRyan J. McDonough
    Jun 2, 2009 at 1:10 am
    Jun 2, 2009 at 6:42 pm
  • How do TTL and Versions specifications interact? I'm guessing that the first limit reached applies, i.e. if TTL is 1 week and versions is 3, adding a fourth update to a data record would cause the ...
    Jon SchutzJon Schutz
    Jun 30, 2009 at 2:22 am
    Jul 1, 2009 at 12:14 am
  • Hi, I playing with a sample program using Map Reduce (MR). All I have a text file(685 MB), and using it to create a HTable. The testing environment is, 1. single node cluster 2. 2 MB RAM 3. Hadoop ...
    Jun 23, 2009 at 1:39 pm
    Jun 26, 2009 at 4:47 am
  • we are studying hadoop. Recently we have some difficulties excuting Hadoop. I have learned that Hodoop doesn't support open operation to modify some file. I heard that in this case, it can be solved ...
    Jun 11, 2009 at 7:20 am
    Jun 12, 2009 at 2:51 pm
  • Out of the 10 HBase nodes on my dev cluster, one is extremely unhappy. It crashes every few hours, with messages like this: 2009-06-03 12:35:21,530 FATAL ...
    Bradford StephensBradford Stephens
    Jun 4, 2009 at 6:25 pm
    Jun 5, 2009 at 10:53 pm
  • This may have been asked before, but I was unable to find by googling. Is there a way in HBase to get columns based on AND criteria? e.g. give me all columns where row key = 'key1' AND row key = ...
    Jun 3, 2009 at 10:52 pm
    Jun 4, 2009 at 12:21 am
  • Hi all, I am curious how people are structuring their data access code when using HBase, so I was hoping for insights from the community. I represent one of those developers with lots of experience ...
    Tim robertsonTim robertson
    Jun 28, 2009 at 2:43 pm
    Jun 30, 2009 at 3:51 am
  • I have some scenarios involving map/reduce that update HBase tables. (They all involve creating or modifying a number of individual records, so I'm planning to do it all in the mapper.) What I'm ...
    Jun 25, 2009 at 3:45 am
    Jun 26, 2009 at 1:00 am
  • Hey all, just a friendly reminder that this is Wednesday! I hope to see everyone there again. Please let me know if there's something interesting you'd like to talk about -- I'll help however I can. ...
    Bradford StephensBradford Stephens
    Jun 23, 2009 at 12:46 am
    Jun 25, 2009 at 9:20 pm
  • Hi, I've noticed that hbase 0.20.0-alpha comes with a non official zookeeper jar (zookeeper-r785019-hbase-1329.jar). Can I deploy hbase 0.20.0-alpha with zookeeper 3.1.1 ? Thanks, Ram
    Ram KulbakRam Kulbak
    Jun 25, 2009 at 8:29 am
    Jun 25, 2009 at 7:55 pm
  • Hello, list! I'm happy to announce Zohmg, a data store for aggregation of multi-dimensional time series data built on top of Hadoop, Dumbo and HBase. Data is imported with a mapreduce job and is ...
    Fredrik MöllerstrandFredrik Möllerstrand
    Jun 24, 2009 at 4:00 pm
    Jun 24, 2009 at 5:23 pm
  • Hey all, HBase appears to startup, but i'm unable to get to UI and I get the following error when trying to create table in shell: ...
    Jun 18, 2009 at 10:34 pm
    Jun 18, 2009 at 10:41 pm
  • Hi Does anybody maybe know, if there exists a method of finding the first row larger (and smaller) in the lexycographical order than given ( not necessarily existing) row id ? In particular I would ...
    Piotr PraczykPiotr Praczyk
    Jun 15, 2009 at 4:45 pm
    Jun 15, 2009 at 5:06 pm
  • Do we have a split test that test to know what the mid key is vs what's I have some regions that have 1kb in size and others that are 1.3GB saying the end key and mid key are the same and they should ...
    Billy PearsonBilly Pearson
    Jun 15, 2009 at 1:16 am
    Jun 15, 2009 at 1:48 am
  • Hi All I define two tables having one to many relationship: Student: student id student data (name, address, ...) courses (use course ids as column qualifiers here) Course: course id course data ...
    Jun 10, 2009 at 7:56 am
    Jun 11, 2009 at 12:25 pm
  • Hi, can anybody tell me, if one uses Hbase/Hadoop in a production environment? Any hints would be appreciated. Juergen
    Jürgen KaatzJürgen Kaatz
    Jun 10, 2009 at 6:45 am
    Jun 10, 2009 at 7:20 am
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60 users for June 2009

Llpind: 66 posts Stack: 57 posts Ryan Rawson: 49 posts Andrew Purtell: 25 posts Billy Pearson: 25 posts Bradford Stephens: 25 posts Erik Holstad: 18 posts Alexandre Jaquet: 15 posts Jean-Daniel Cryans: 11 posts Murali Krishna. P: 10 posts Tim robertson: 10 posts Jonathan Gray: 9 posts Y_823910: 8 posts Fred Zappert: 7 posts Mike anderson: 6 posts Ric Wang: 6 posts Schnitzi: 6 posts Zsongbo: 6 posts Fredrik Möllerstrand: 5 posts Jason hadoop: 5 posts
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