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47 discussions - 162 posts

  • I have a 5 slave servers and I would like to be rackaware meaning each server represents 1 rack resulting in 5 racks. I have looked around for examples online but could not find anything concrete. ...
    Mag GamMag Gam
    Mar 3, 2010 at 3:43 am
    Mar 20, 2010 at 6:05 pm
  • The Avro subproject has voted to become a TLP: http://mail-archives.apache.org/mod_mbox/hadoop-avro-dev/201003.mbox/%3C4BAA70A6.10907@apache.org%3E Does the Hadoop community have any questions or ...
    Doug CuttingDoug Cutting
    Mar 30, 2010 at 11:51 pm
    Apr 12, 2010 at 4:19 pm
  • We have an existing HDFS cluster with several datanodes, and we want to add each of the datanodes another hard-disk, as an addition to the existing ones. Is there a way of doing this without ...
    Oded RosenOded Rosen
    Mar 1, 2010 at 8:59 am
    Mar 2, 2010 at 12:29 am
  • I'm trying to build the native libraries for hadoop on Mac OS X Leopard (10.5.8) for Hadoop 0.20.1 I tried the "ant compile-native" method, but I don't have access to the internet. I do have a local ...
    Christopher TubbsChristopher Tubbs
    Mar 10, 2010 at 4:45 am
    Mar 12, 2010 at 6:11 am
  • Hi, I try to compile hadoop common of the release 0.20.2. Below are the error messages and java and ant versions I am using. Please tell me what I missed. ...... [javadoc] Standard Doclet version ...
    Gary YangGary Yang
    Mar 5, 2010 at 11:48 pm
    Mar 8, 2010 at 10:21 pm
  • Hi Hadoop, Hive, and Sqoop users, For the past year, the Apache Hadoop MapReduce project has played host to Sqoop, a command-line tool that performs parallel imports and exports between relational ...
    Aaron KimballAaron Kimball
    Mar 29, 2010 at 7:03 pm
    Mar 30, 2010 at 7:22 pm
  • Could someone clarify the position on the 0.21 release? This thread: http://mail-archives.apache.org/mod_mbox/hadoop-general/201002.mbox/<dfe484f01002161412h8bc953axee2a73d81a234bdf@mail.gmail.com ...
    Jeremy DavisJeremy Davis
    Mar 19, 2010 at 4:43 pm
    Mar 22, 2010 at 1:32 pm
  • Hadoop 0.20.2 is released and propagating to mirrors. The list of changes may be found in the release notes: http://bit.ly/dd6rwL And in JIRA: COMMON: http://bit.ly/9fDo2f MAPREDUCE: ...
    Chris DouglasChris Douglas
    Mar 1, 2010 at 9:32 pm
    Mar 11, 2010 at 2:13 am
  • Can anyone comment on why the base *Writable implementations (e.g. IntWritable, LongWritable, etc) don't specify WritableComparable<T 's type param T? I noticed this when I tried to use ...
    Andy SchlaikjerAndy Schlaikjer
    Mar 29, 2010 at 11:07 pm
    Mar 30, 2010 at 5:28 pm
  • Hi All, I got exception below. I followed the Quick Start for the Pseudo-Distributed Operation. I did what the quick start says. Can someone help? cat conf/core-site.xml <?xml version="1.0"? ...
    Gary YangGary Yang
    Mar 23, 2010 at 7:19 pm
    Mar 24, 2010 at 6:14 pm
  • I just setup my first hadoop cluster with 5 nodes. What is the best way to check if replication is really working? I assume the best way is to power down 2 nodes and see if I can still reach my data? ...
    Mag GamMag Gam
    Mar 1, 2010 at 8:04 am
    Mar 1, 2010 at 6:02 pm
  • After upgrading to hadoop-0.20.2, I started seeing these messages in the log: 2010-03-22 09:56:28,393 INFO org.apache.hadoop.ipc.Server: IPC Server handler 1 on 9000, call ...
    Something SomethingSomething Something
    Mar 22, 2010 at 5:11 pm
    Mar 22, 2010 at 8:58 pm
  • Hi, all The KV pairs (kv1, kv2, kv3 kv4) out from mapper would be partitioned into R parts (e.g. R=2) by a partitioner. For example, kv1 and kv2 are in partition1, while kv3 and kv4 are in ...
    Yanfeng ZhangYanfeng Zhang
    Mar 6, 2010 at 3:51 am
    Mar 30, 2010 at 12:15 am
  • Greetings. Some time ago we submitted a patch for HOD that adds Sun Grid Engine integration (I believe it was HADOOP-6369). It appears that this patch is now used in production in more than one site, ...
    Gianluigi ZanettiGianluigi Zanetti
    Mar 25, 2010 at 3:01 pm
    Mar 25, 2010 at 6:17 pm
  • Hi, I am working on Ubuntu 9.04/9.10 and hadoop 0.20.2. Here the problem is that for Pseudo Distributed and Distributed clusters, it takes undefined time (1 minute to several minutes, sometimes more ...
    Mohammed A HassanMohammed A Hassan
    Mar 12, 2010 at 12:29 am
    Mar 12, 2010 at 10:13 am
  • Hi, I would like to download the source code of hadoop-0.20.2. I am at http://mirrors.devlib.org/apache/hadoop/core/hadoop-0.20.2/hadoop-0.20.2. It shows me the "src" directory. However, I am not ...
    Gary YangGary Yang
    Mar 5, 2010 at 7:34 pm
    Mar 5, 2010 at 7:39 pm
  • I plan to setup HDFS on 20 servers. I plan on using /fs for my data. I want /fs to have atleast 20% free therefore I don't want this filesystem to be filled up with hdfs data. Is there a way to ...
    Mag GamMag Gam
    Mar 4, 2010 at 3:54 am
    Mar 4, 2010 at 12:03 pm
  • Hi Team, Is there anyone who can suggest any performance tools that can be used on the hadoop environment? Regards, Dev
    DevenderDevender
    Mar 3, 2010 at 12:26 pm
    Mar 3, 2010 at 1:04 pm
  • i currently use avro version 1.3.0 to log data. I am having difficulty processing these avro logs via a map reduce job written in Python using hadoop streaming(v 0.21.0). Any help here is much ...
    Mona GandhiMona Gandhi
    Mar 31, 2010 at 8:07 pm
    Apr 6, 2010 at 6:32 pm
  • When I run a Hadoop job in a command shell it runs in 21 secs, but when I run the same from within Eclipse IDE it runs in 1 second! Trying to figure out what the reason is. The output is shown below: ...
    Something SomethingSomething Something
    Mar 28, 2010 at 7:10 pm
    Mar 28, 2010 at 11:39 pm
  • The Apache ZooKeeper team is proud to announce Apache ZooKeeper version 3.3.0. ZooKeeper is a high-performance coordination service for distributed applications. It exposes common services - such as ...
    Patrick HuntPatrick Hunt
    Mar 26, 2010 at 11:55 pm
    Mar 27, 2010 at 2:40 am
  • Hi, hadoop has entered Debian unstable a few days ago: http://packages.qa.debian.org/h/hadoop.html Please use it, test it, spread the word about it! Having Hadoop in a major linux distribution can ...
    Thomas KochThomas Koch
    Mar 25, 2010 at 2:01 pm
    Mar 27, 2010 at 2:40 am
  • Hi, Lucandra stores a lucene index on cassandra: http://blog.sematext.com/2010/02/09/lucandra-a-cassandra-based-lucene-backend As the author of lucandra writes: "I’m sure something similar could be ...
    Thomas KochThomas Koch
    Mar 25, 2010 at 3:14 pm
    Mar 25, 2010 at 5:10 pm
  • Dear Users I want to know the difference between Hadoop and clusters(Torque,SGE) -- with regards, B.Madusudhanan, Research Fellow.
    MadhusonaMadhusona
    Mar 24, 2010 at 4:01 pm
    Mar 24, 2010 at 4:05 pm
  • Hi, I just moved from pseudo distributed hadoop to a four machine full distributed hadoop setup. But, after I start the dfs, there is no live node showing up. If I make master a slave too, then the ...
    William KangWilliam Kang
    Mar 17, 2010 at 6:44 am
    Mar 17, 2010 at 5:12 pm
  • We also created a Meetup group in case you prefer to register on meetup.com http://www.meetup.com/Hive-User-Group-Meeting/calendar/12741356/ We are hosting a Hive User Group Meeting, open to all ...
    Zheng ShaoZheng Shao
    Mar 1, 2010 at 7:58 pm
    Mar 15, 2010 at 9:00 pm
  • I have 4 hosts, hostA, hostB, hostC, hostD. I plan on hosting my data directory as follows: hostA: /data hostB: /somedata hostC: /data hostD: /blahBalh Is it possible to give a "macro" for each host ...
    Mag GamMag Gam
    Mar 13, 2010 at 4:46 pm
    Mar 13, 2010 at 6:54 pm
  • Seeing as how our two non-mainline distributions don't have real release notes published, I've built two quick and dirty perl scripts (yes perl! Fear the ops people!) to take the commit log from CDH ...
    Allen WittenauerAllen Wittenauer
    Mar 11, 2010 at 6:48 pm
    Mar 12, 2010 at 11:24 pm
  • Hi list, I remember seeing a mail about this already, but I can't find it back in the archives - maybe I remembered wrong. When I try to compile hadoop-core 0.20.2 I'm getting a SocketException while ...
    Evert LammertsEvert Lammerts
    Mar 11, 2010 at 2:10 pm
    Mar 11, 2010 at 4:25 pm
  • HDFS Architecture talks more about fault tolerance. - http://hadoop.apache.org/common/docs/current/hdfs_design.html Removing core-dev@ & common-dev@ from list. Please post general questions to ...
    Ravi PhulariRavi Phulari
    Mar 6, 2010 at 7:51 am
    Mar 9, 2010 at 4:20 am
  • *I just ran a simple program, and got the error below:* # # A fatal error has been detected by the Java Runtime Environment: # # SIGFPE (0x8) at pc=0x00000030bda07927, pid=22891, tid=1076017504 # # ...
    Forbbs forbbsForbbs forbbs
    Mar 8, 2010 at 2:14 am
    Mar 8, 2010 at 6:23 am
  • The Hadoop PMC has voted to add Namit Jain to the Hadoop PMC. Congratulations, Namit! -- Owen
    Owen O'MalleyOwen O'Malley
    Mar 31, 2010 at 10:21 pm
    Mar 31, 2010 at 10:21 pm
  • GIT is one of the most popular distributed version control system. In the hope, that more Java developers may want to explore the world of easy branching, merging and patch management, I'd like to ...
    Thomas KochThomas Koch
    Mar 31, 2010 at 7:50 am
    Mar 31, 2010 at 7:50 am
  • Many of you that attended the Bay Area HUG meeting in January* wanted to know if and when LinkedIn would be open sourcing our simple batch scheduler for Hadoop. I'm pleased to announce that, yes, ...
    Allen WittenauerAllen Wittenauer
    Mar 30, 2010 at 9:32 pm
    Mar 30, 2010 at 9:32 pm
  • Hi All Yahoo! is proud to host the 3rd Annual Hadoop Summit - June 29th, Santa Clara, California Registration and call for papers are now open at - http://www.hadoopsummit.org Attend keynotes by ...
    Dekel TankelDekel Tankel
    Mar 25, 2010 at 3:59 am
    Mar 25, 2010 at 3:59 am
  • Thanks, Tom! We just need one more vote from a Hadoop PMC member to release this. Doug Tom White wrote:
    Doug CuttingDoug Cutting
    Mar 18, 2010 at 11:30 pm
    Mar 18, 2010 at 11:30 pm
  • As you may have seen on the various dev lists, some of the Hadoop sub- projects such as HBase and Avro have started discussions on their dev lists about becoming top level Apache projects. This is ...
    Owen O'MalleyOwen O'Malley
    Mar 18, 2010 at 8:48 pm
    Mar 18, 2010 at 8:48 pm
  • JobTracker has methods such as getRunningJobs, completedJobs, failedJobs that return a collection of JobInProgress. All these methods are 'public', but the type of elements that they return ...
    Something SomethingSomething Something
    Mar 18, 2010 at 5:00 am
    Mar 18, 2010 at 5:00 am
  • Is there an easy way to get information about jobs (such as Job status etc) programatically? Basically retrieving all the info that's usually available at: http://localhost:50030/jobtracker.jsp Seems ...
    Something SomethingSomething Something
    Mar 17, 2010 at 5:30 am
    Mar 17, 2010 at 5:30 am
  • FYI, an Avro release vote is in progress on avro-dev@h.a.o. Doug -------- Original Message -------- Subject: [VOTE] Avro release 1.3.1 (rc 0) Date: Fri, 12 Mar 2010 13:43:12 -0800 From: Doug Cutting ...
    Doug CuttingDoug Cutting
    Mar 15, 2010 at 7:02 pm
    Mar 15, 2010 at 7:02 pm
  • Hi, We get errors when we use MultipleTextOutputFormat to split reduce results into different dirs on the hdfs. The errors will occur only when there are more then ~10 different output dirs. We get ...
    Oded RosenOded Rosen
    Mar 13, 2010 at 1:32 pm
    Mar 13, 2010 at 1:32 pm
  • I just setup a new Hadoop cluster. When I do hadoop dfs -copyFromLocal /tmp/zero zero the file zero is being copied to the current working directory. Its not going to the DFS. Is there a way to fix ...
    Mag GamMag Gam
    Mar 6, 2010 at 7:05 am
    Mar 6, 2010 at 7:05 am
  • Hi all, As the Dutch Center for High Performance Computing & Networking we (SARA - http://www.sara.nl) are experimenting with a number of new technologies and paradigms, among which Hadoop. At the ...
    Evert LammertsEvert Lammerts
    Mar 3, 2010 at 8:54 pm
    Mar 3, 2010 at 8:54 pm
  • Hi all, RSVP is open for the next monthly Bay Area Hadoop user group at the Yahoo! Sunnyvale Campus, Wednesday, March 24th, 6PM Please note that due to the growing demand we are moving the meeting ...
    Dekel TankelDekel Tankel
    Mar 3, 2010 at 6:08 pm
    Mar 3, 2010 at 6:08 pm
  • Pig 0.6.0 is released. This release includes performance and memory usage improvements, a new Accumulator interface for UDFs, and many bug fixes. You can see the details of the release at ...
    Alan GatesAlan Gates
    Mar 2, 2010 at 3:53 am
    Mar 2, 2010 at 3:53 am
  • Avro 1.3.0 is now available. In this release: - the Avro file format has been revised and simplified; - the source tree and release artifacts have been restructured; - the Java port has been ...
    Doug CuttingDoug Cutting
    Mar 1, 2010 at 9:14 pm
    Mar 1, 2010 at 9:14 pm
  • Hi folks, Maybe a bit off topic, but then not: I have been playing for a while with a semantic network covering the Hadoop ecosphere, MapReduce in general, a bit of CC technologies. My real objective ...
    Robert BartaRobert Barta
    Mar 1, 2010 at 10:46 am
    Mar 1, 2010 at 10:46 am
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63 users for March 2010

Mag Gam: 14 posts Allen Wittenauer: 13 posts Christopher Tubbs: 9 posts Gary Yang: 8 posts Marc Farnum Rendino: 7 posts Doug Cutting: 6 posts Eli Collins: 6 posts Something Something: 6 posts Michael Thomas: 5 posts Steve Loughran: 5 posts Aaron Kimball: 4 posts Bernd Fondermann: 3 posts Chris Douglas: 3 posts Evert Lammerts: 3 posts Owen O'Malley: 3 posts Stephen Watt: 3 posts Ted Yu: 3 posts Thomas Koch: 3 posts Todd Lipcon: 3 posts Andy Schlaikjer: 2 posts
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