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25 discussions - 115 posts

  • Hi Currently I have 3 servers, A, B, C 1. I unpacked Hadoop separately on three machines on the same folder (local): /home/hadoop/ 2. I follow the documentation, set up the JAVA_HOME path, and ...
    Howard chenHoward chen
    Nov 4, 2006 at 2:15 pm
    Nov 10, 2006 at 4:10 am
  • Hi, I have a cluster of more than 25 servers which basically serves the purpose for storage. However I was wondering what will happen if the master node gets exhausted of disk space. If I add more ...
    Nov 1, 2006 at 4:01 pm
    Nov 10, 2006 at 11:52 am
  • Hi all, For example, I have a MapFile, which is like: K - V 1 - 1 1 - 2 1 - 3 2 - 1 2 - 2 2 - 3 3 - 1 3 - 2 3 - 3 when i call mapFile.get(2, value), the value will be filled as 2, not 1. Is is a bug ...
    Feng JiangFeng Jiang
    Nov 28, 2006 at 6:16 am
    Nov 29, 2006 at 3:39 am
  • Hi, I was just wondering how DFS frees up disk space. Whenever I delete something, I notice that disk space isn't freed up immediately. If I restart the DFS, it's freed immediately on startup. Is ...
    Vetle RoeimVetle Roeim
    Nov 13, 2006 at 3:50 pm
    Nov 15, 2006 at 9:38 pm
  • I think some features are very useful for us: 1. Multi-key types supported in input. for example: SEQ file A is <Ka, Va pair, and SEQ file B is <Kb, Vb pair. I can simply add both of these files as ...
    Feng JiangFeng Jiang
    Nov 4, 2006 at 5:57 am
    Dec 20, 2006 at 5:01 pm
  • Howdy, Is there a way to store "by-product" data someplace where it can be read? For example, as I'm iterating over a collection of documents, I want to generate some statistics about the collection, ...
    David PollakDavid Pollak
    Nov 8, 2006 at 12:04 am
    Nov 8, 2006 at 11:19 pm
  • Hi: After startind HDFS, I am able to create directories via the Hadoop api and the shell app. However I am not able to create a new file: I keep on getting problems connecting to the data node. (on ...
    John WangJohn Wang
    Nov 24, 2006 at 2:11 am
    Nov 28, 2006 at 3:01 pm
  • Does it make sense to build large lucene indexes onto the Hadopp DFS? I would think there would be some performance concerns? Did anyone have experiences with this? Thanks -John
    John WangJohn Wang
    Nov 18, 2006 at 11:42 pm
    Nov 20, 2006 at 11:51 pm
  • This is going to be a long email. I am seeing a race condition between the renewing of leases on the DFS and RPC client timeout values and I wanted to get some feedback on this. We keep seeing leases ...
    Dennis KubesDennis Kubes
    Nov 1, 2006 at 8:02 pm
    Nov 1, 2006 at 10:15 pm
  • Hi all: Now I want to do some operations like ‘update’ or ‘insert’, which can describe like this: 1. I have a base dataset 2. Everyday I will get more data from other places, and then I want to ...
    Nov 13, 2006 at 3:08 am
    Nov 13, 2006 at 6:59 pm
  • I am experimenting with some of the tests in hadoop-0.8.0-test.jar and am curious about the possible causes of mapredtest failing. I make the call as follows: bin/hadoop jar hadoop-0.8.0-test.jar ...
    Brendan MelvilleBrendan Melville
    Nov 9, 2006 at 6:07 pm
    Nov 9, 2006 at 6:39 pm
  • look at the code: job.setNumReduceTasks(1); // force a single reduce task why? Is there any difficulty there to allow multiple reduce tasks? Best regards, Feng
    Feng JiangFeng Jiang
    Nov 7, 2006 at 1:49 pm
    Nov 8, 2006 at 1:50 am
  • Hello, One error I seem to be getting a lot is "Lost Task Tracker". The two reduce tasks that a particular machine is working on will fail with this error, which then propagates back to all the map ...
    Albert ChernAlbert Chern
    Nov 23, 2006 at 8:37 pm
    Nov 27, 2006 at 10:12 pm
  • When running the command bin/hadoop namenode -format, the config file is parsed, and then I am dropped back to the shell. Does anyone have experience with such an issue? Thank you. Brendan
    Brendan MelvilleBrendan Melville
    Nov 27, 2006 at 2:43 am
    Nov 27, 2006 at 7:59 am
  • Hi All, Is there anyway I can append to an existing file in HDFS? Thanks Jugs
    Nov 24, 2006 at 1:00 pm
    Nov 25, 2006 at 8:14 am
  • Hi all: I have encountered one problem about displaying log info on Console. This is the detailed sentence, in order to show it more clearly, I will use the code of wordcount: public class WordCount ...
    Nov 1, 2006 at 10:52 am
    Nov 1, 2006 at 3:13 pm
  • Is there a shell someone has written or writing to hadoop? e.g. a simple unix shell that executes file commands to a HDFS such as, ls, rm, cp ...? Thanks -John
    John WangJohn Wang
    Nov 18, 2006 at 11:39 pm
    Nov 19, 2006 at 5:20 am
  • Have anyone experienced this? When the cluster is busy sometimes one map task of a job gets stuck. An attempt is then made to kill the task, but this fails. This shows up in the web interface: ...
    Johan OskarssonJohan Oskarsson
    Nov 17, 2006 at 5:21 pm
    Nov 17, 2006 at 7:58 pm
  • Hello all, I have been searching through the Hadoop mail archives, but I could not find a relevant answer to my question. Before starting, let me say that I am a newbie, just beginning to explore the ...
    Nov 16, 2006 at 3:07 pm
    Nov 16, 2006 at 5:30 pm
  • Hi, I am installing Hadoop for the first time. I am running the name node on the master (node0). In the worker I set the fs.default.name property to node0:40010. After I format the namenode and ...
    Anurup PavuluriAnurup Pavuluri
    Nov 15, 2006 at 1:24 am
    Nov 15, 2006 at 2:36 am
  • Hi list, How can I start webapp under hadoop, it seems build.xml has nothing to do with it. -- scott
    Scott greenScott green
    Nov 12, 2006 at 6:37 pm
    Nov 12, 2006 at 11:48 pm
  • Hello, I have been following the Getting Started guide to get Hadoop up and running in fully distributed operation but have encountered some problems. The version I'm using is hadoop-0.5.0. I have 2 ...
    Nov 27, 2006 at 8:37 am
    Nov 27, 2006 at 8:37 am
  • Is this possible if i will use the Hadoop to replace the index directory in PHP? <?php require_once('Zend/Search/Lucene.php'); $index=newZend_Search_Lucene('/data/my_index'); $index- find($query); ? ...
    James ZhengJames Zheng
    Nov 15, 2006 at 9:50 am
    Nov 15, 2006 at 9:50 am
  • Hi, Currently, I have a web front end for user to do full text index with Lucene on a single server, but is it possible to span the search on several servers, with the help of Hadop, so query time ...
    Howard chenHoward chen
    Nov 2, 2006 at 7:04 am
    Nov 2, 2006 at 7:04 am
  • On each of my nodes that I have deployed Hadoop to I also deployed another large java project. The deployment is in the same place at each node. Is there a way I can set the classpath of each task to ...
    Nov 2, 2006 at 4:16 am
    Nov 2, 2006 at 4:16 am
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34 users for November 2006

Doug Cutting: 15 posts Howard chen: 15 posts Feng Jiang: 13 posts Dennis Kubes: 8 posts John Wang: 6 posts Vetle Roeim: 6 posts Albert Chern: 5 posts David Pollak: 4 posts Lee: 4 posts Brendan Melville: 3 posts Dhruba Borthakur: 3 posts Jagadeesh: 3 posts Konstantin Shvachko: 3 posts Milind Bhandarkar: 3 posts Bryan A. P. Pendleton: 2 posts Runping Qi: 2 posts Yoram Arnon: 2 posts 张茂森: 2 posts Grad0584: 1 post AaRon: 1 post
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