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26 discussions - 87 posts

  • Hi David, a student once wrote a paper about map reduce and clustering in my company during a internal ship. I will send it to you off list since the list does not support attachments. However if ...
    Stefan GroschupfStefan Groschupf
    Oct 26, 2006 at 11:14 pm
    Oct 30, 2006 at 11:10 am
  • I'm not sure I am understanding this correctly and I don't see anything on this in the Getting Started section, so... It seems that when I want to run my application in distributed mode, I should ...
    Grant IngersollGrant Ingersoll
    Oct 28, 2006 at 4:47 pm
    Oct 30, 2006 at 9:08 pm
  • Hi all, I just started using the Hadoop DFS last night, and it has already solved a big performance problem we were having with throughput from our shared NFS storage. Thanks for everyone who has ...
    Trevor StrohmanTrevor Strohman
    Oct 11, 2006 at 2:00 pm
    Oct 16, 2006 at 5:43 pm
  • Hi,everyone: do you know how to implement the method RecordReader.creatValue() i am trying to use hadoop0.7.2 in nutch0.8.1 and tried to implemented this method by my imagination, but can not work ...
    Oct 28, 2006 at 1:25 am
    Oct 29, 2006 at 10:16 am
  • HadoopStreaming looks really cool, and I'm trying it for the first time. I'm obviously doing something wrong, but I have no clue what. I made a goofy little wordcount mapper and reducer in Python, ...
    Andrew McNabbAndrew McNabb
    Oct 17, 2006 at 8:13 pm
    Oct 18, 2006 at 6:44 pm
  • No need there, each job will be one language pair, but is is an interesting idea that may be worth pursuing down the road. OK, that makes more sense. I wasn't totally clear on SeqFile, but based on ...
    Grant IngersollGrant Ingersoll
    Oct 26, 2006 at 1:09 am
    Oct 26, 2006 at 6:10 pm
  • I just upgraded from Hadoop 0.6.2 to 0.7.1. I'm having a new networking problem now. My mapred.job.tracker now only listens on localhost ( All of the other services seem to be behaving ...
    Andrew McNabbAndrew McNabb
    Oct 17, 2006 at 7:21 pm
    Oct 17, 2006 at 8:29 pm
  • hello all, from the page: http://wiki.apache.org/lucene-hadoop/GettingStartedWithHadoop The first step to starting up your Hadoop installation is formatting the file system. You need to do this the ...
    Howard chenHoward chen
    Oct 11, 2006 at 4:34 pm
    Oct 11, 2006 at 4:49 pm
  • I know in general that I shouldn't worry too much about initialization costs, as they will be amortized over the life of the job and are often a drop in the bucket time wise. However, in my setup I ...
    Grant IngersollGrant Ingersoll
    Oct 30, 2006 at 1:47 pm
    Oct 30, 2006 at 5:49 pm
  • Howdy, I'm new to Hadoop. I've got a network of 8 machines with ~1.8TB of storage. My first Hadoop test run is to count the URLs in a set of crawled pages (~1.6M pages consuming about 70GB of space.) ...
    David PollakDavid Pollak
    Oct 26, 2006 at 6:41 am
    Oct 26, 2006 at 9:57 pm
  • Hi, I have a storage cluster setup with 30 nodes using Hadoop and it was working fine without any issues. But the hard drive of the machine running master node failed yesterday and in no way I can ...
    Oct 26, 2006 at 4:41 am
    Oct 26, 2006 at 7:04 am
  • Howdy, I've got a DFS cluster. I added a new machine to my cluster. The new machine is the fastest in the cluster (a Core 2 Duo E6600 which blows every machine I've ever used out of the water... but ...
    David PollakDavid Pollak
    Oct 26, 2006 at 6:48 am
    Oct 26, 2006 at 6:55 am
  • Howdy, Can anyone point me to an example of chaining MapReduce operations (e.g., Word Count followed by inverting the "Word" and "Count" columns so one wound up with the list sorted by count rather ...
    David PollakDavid Pollak
    Oct 26, 2006 at 12:26 am
    Oct 26, 2006 at 6:43 am
  • Hello, After upgrading from 0.6 to 0.7, we have experienced a strange error with MapReduce jobs. Jobs that ran perfectly before now seem to have trouble finding the classes from our code. The stack ...
    Albert ChernAlbert Chern
    Oct 13, 2006 at 2:45 am
    Oct 17, 2006 at 8:37 pm
  • Hi all, The org.apache.hadoop.record package contains some very interesting stuff. However, I can't find any use of it within Hadoop itself (nor in Nutch). Is it because it's intended for ...
    Sylvain WallezSylvain Wallez
    Oct 9, 2006 at 3:02 pm
    Oct 10, 2006 at 8:59 pm
  • Hi, What does this mean: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.dfs.SafeModeException: Cannot delete /tmp/hadoop- <my user name /mapred/system. Name node is in safe mode. Safe mode ...
    Grant IngersollGrant Ingersoll
    Oct 26, 2006 at 5:00 pm
    Oct 26, 2006 at 5:25 pm
  • Hi, I want to put Hadoop into my webapp and have it start up when the servlet starts up. Based on the shell scripts, I think I would need to do the following: 1. Package the appropriate libraries and ...
    Grant IngersollGrant Ingersoll
    Oct 26, 2006 at 1:03 am
    Oct 26, 2006 at 6:06 am
  • Hi, Is there a searchable archive of this mailing list somewhere? The website has gz files to download (I suppose I could index and search them using Lucene!) and I don't see this list on nabble or ...
    Grant IngersollGrant Ingersoll
    Oct 18, 2006 at 5:05 pm
    Oct 18, 2006 at 7:11 pm
  • I have a question. If a record(one text line) is laid across two blocks, map function can't process that line because the line from TextInputFormat is not complete line. How do I resolve this ...
    Oct 17, 2006 at 1:23 am
    Oct 17, 2006 at 2:35 pm
  • as title. any library provided for making call to hadoop from web interface? thanks.
    Howard chenHoward chen
    Oct 16, 2006 at 1:50 pm
    Oct 16, 2006 at 2:01 pm
  • Hi all: I’m trying to use hadoop to process logs. I’ve write some routine to count the login times of the same ip. However, because my logs’ characters are hybrid encoded (ASCII, Unicode, UTF-8 etc), ...
    Oct 9, 2006 at 9:55 am
    Oct 9, 2006 at 4:38 pm
  • Hello, I have run into a problem when attempting to run jobs that require code from multiple jars. The JobConf only allows me to set one jar file, so the other jars are not copied to the task ...
    Albert ChernAlbert Chern
    Oct 6, 2006 at 7:35 am
    Oct 6, 2006 at 8:54 am
  • I just added a new wiki page describing how I was able to use Hadoop on Amazon's EC2 computing infrastructure. If others test this, please help improve it. ...
    Doug CuttingDoug Cutting
    Oct 27, 2006 at 10:45 pm
    Oct 27, 2006 at 10:45 pm
  • Hi, I did some M/R test on a 8 computers cluster. The mapper just generate some random data (8 maps) and one reduce merges it. The data generated by the maps (intentionally) is larger than the disk ...
    Ion BaditaIon Badita
    Oct 26, 2006 at 6:44 am
    Oct 26, 2006 at 6:44 am
  • Hi all, There is a critical bug in Hadoop 0.7 release which crashes most of your map reduce jobs if you are using multiple temporary directories for map reduce. The bug and the patch are available at ...
    Mahadev KonarMahadev Konar
    Oct 17, 2006 at 6:30 pm
    Oct 17, 2006 at 6:30 pm
  • Hi , Using Hadoop 0.6.2 in the final reduce phases it keeps generating this type of exception Any info/help apreciated! Marcel java.nio.charset.MalformedInputException: Input length = 33 at ...
    Marcel PetrisorMarcel Petrisor
    Oct 2, 2006 at 10:37 am
    Oct 2, 2006 at 10:37 am
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32 users for October 2006

Doug Cutting: 10 posts Grant Ingersoll: 8 posts Albert Chern: 7 posts David Pollak: 7 posts Yoram Arnon: 6 posts Andrew McNabb: 5 posts Andrzej Bialecki: 3 posts Howard chen: 3 posts Mahadev Konar: 3 posts Owen O'Malley: 3 posts Stefan Groschupf: 3 posts Trevor Strohman: 3 posts Dennis Kubes: 2 posts Grant Ingersoll: 2 posts Jagadeesh: 2 posts Sylvain Wallez: 2 posts TKDD: 2 posts Vetle Roeim: 2 posts 김형준: 1 post Benjamin Reed: 1 post
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