Couple of basic hdfs starter issues

2008-06-07 Thread chris collins
Sorry in advance if these challenges are covered in a document somewhere. I have setup hadoop on a centos 64 bit Linux box. I have verified that it is up and running only through seeing the java processes running and that I can access it from the admin ui. hadoop version is 1.7.0 but I also

RE: Couple of basic hdfs starter issues

2008-06-07 Thread chris collins
a more obvious thing). Still if anyone has an idea what happened to language id and the carrot2 stuff inside nutch that would be appreciated. C -Original Message- From: chris collins [mailto:[EMAIL PROTECTED] Sent: Sat 6/7/2008 10:54 AM To: core-user@hadoop.apache.org Subject: Couple

Re: client connect as different username?

2008-06-11 Thread Chris Collins
The finer point to this is that in development you may be logged in as user x and have a shared hdfs instance that a number of people are using. In that mode its not practical to sudo as you have all your development tools setup for userx. hdfs is setup with a single user, what is the

Re: client connect as different username?

2008-06-11 Thread Chris Collins
holds the answer which was blindly dumb on my part for not trying, that of adding a user in unix and creating a group that those users belong to. Thanks Chris On Jun 11, 2008, at 5:36 PM, Allen Wittenauer wrote: On 6/11/08 5:17 PM, Chris Collins [EMAIL PROTECTED] wrote: The finer point

Re: client connect as different username?

2008-06-11 Thread Chris Collins
Thanks Doug, should this be added to the permissions doc or to the faq? See you in Sonoma. C On Jun 11, 2008, at 9:15 PM, Doug Cutting wrote: Chris Collins wrote: You are referring to creating a directory in hdfs? Because if I am user chris and the hdfs only has user foo, then I cant

Re: Programatically initializing and starting HDFS cluster

2008-06-12 Thread Chris Collins
I am also interested about this option, since I will probably be hacking at such a thing in the next few weeks. I am also curious if you can run MR jobs within process rather than launching each time. The scenario is when initialization takes just way too long for a map reduce shard to be

Re: client connect as different username?

2008-06-12 Thread Chris Collins
. On Jun 11, 2008, at 10:00 PM, [EMAIL PROTECTED] wrote: This information can be found in http://hadoop.apache.org/core/docs/current/hdfs_permissions_guide.html Nicholas - Original Message From: Chris Collins [EMAIL PROTECTED] To: core-user@hadoop.apache.org Sent: Wednesday, June 11

Re: Internet-Based Secure Clustered FS?

2008-06-18 Thread Chris Collins
Have you considered Amazon S3? I dont know how secure your requirements are. There are lots of companies using this for just offsite data storage and also with EC2. C On Jun 17, 2008, at 6:48 PM, Kenneth Miller wrote: All, I'm looking for a solution that would allow me to securely

Re: Can anyone recommend me a inter-language data file format?

2008-11-01 Thread Chris Collins
Sleepycat has a java edition: http://www.oracle.com/technology/products/berkeley-db/index.html I has an interesting open source license. If you dont need to ship it on an install disk your probably good to go with that too. you could also consider Derby. C On Nov 1, 2008, at 7:49 PM,

Re: Can anyone recommend me a inter-language data file format?

2008-11-01 Thread Chris Collins
Consider talking to Doug Cutting. He is playing with the idea of a variant of JSON, I am sure he would love your help. Specifically he is looking at a coding scheme that is easy to read, does not duplicate key names per record and supports file splits. C On Nov 1, 2008, at 8:20 PM, Zhou,

Re: Hadoop datanode crashed - SIGBUS

2008-12-01 Thread Chris Collins
Was there anything mentioned as part of the tombstone message about problematic frame? What java are you using? There are a few reasons for SIGBUS errors, one is illegal address alignment, but from java thats very unlikelythere were some issues with the native zip library in older

Re: Hadoop datanode crashed - SIGBUS

2008-12-01 Thread Chris Collins
Java(TM) SE Runtime Environment (build 1.6.0_07-b06) Java HotSpot(TM) Server VM (build 10.0-b23, mixed mode) I will try to stress test the memory. -Sagar Chris Collins wrote: Was there anything mentioned as part of the tombstone message about problematic frame? What java are you using

Re: Is there any performance issue with Jrockit JVM for Hadoop

2009-05-07 Thread Chris Collins
a couple of years back we did a lot of experimentation between sun's vm and jrocket. We had initially assumed that jrocket was going to scream since thats what the press were saying. In short, what we discovered was that certain jdk library usage was a little bit faster with jrocket, but

Re: Huge DataNode Virtual Memory Usage

2009-05-09 Thread Chris Collins
(build 1.6.0_10-b33) Java HotSpot(TM) 64-Bit Server VM (build 11.0-b15, mixed mode) Do you know of a specific bug # in the JDK bug database that addresses this ? Cheers, Stefan From: Chris Collins ch...@scoutlabs.com Reply-To: core-user@hadoop.apache.org Date: Fri, 8 May 2009 20:34:21 -0700