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Will HDFS cache the meta data in client side ? - HDFS - [mail # user]
...Hi all,  According the GFS paper claims, GFS will cache meta data in client. But when I check the source code of hadoop, it seems that hadoop won't cache it in client side. I just make ...
   Author: Jeff Zhang, 2010-06-07, 05:32
bin/start-dfs.sh do not support -importCheckpoint ? - HDFS - [mail # user]
...Hi all,  I loo the start-dfs.sh, it seems that it only support three start mode importCheckpoint ? what is the consideration ?    Best Regards  Jeff Zhang...
   Author: Jeff Zhang, 2010-05-21, 06:36
[expand - 2 more] - Re: Is it possible to recover name node just using the meta data in a new machine - HDFS - [mail # user]
...Thanks Todd, I forgot to change dfs.http.address    On Fri, May 21, 2010 at 12:58 PM, Todd Lipcon  wrote:  to y d n(DecommissionManager. d 119) tor.java:216) (HttpServer....
   Author: Jeff Zhang, 2010-05-21, 05:19
[expand - 1 more] - Re: SecondaryNameNode can not been changed once deployed ? - HDFS - [mail # user]
...I found the problem, I should set parameter dfs.http.address. Seems the official tutorial has no information for this case.    On Fri, May 14, 2010 at 10:11 AM, Jeff Zhang  wr...
   Author: Jeff Zhang, 2010-05-14, 08:44
This format path "{2009/12,2010/01}" is not supported in FileSystem.globStatus - HDFS - [mail # user]
...Hi all,  As my title shows, it seems that "{2009/12,2010/01}" is not supported in FileSystem.globStatus, but in my opinion, it would be better if hdfs can support this kind of path. Doe...
   Author: Jeff Zhang, 2010-03-23, 10:22
[expand - 2 more] - Re: Accessing Hadoop DFS for Data Storage and Retrieval Using Java - HDFS - [mail # user]
...Yes, I think so.  2010/3/10 Miguel Ángel Álvarez de la Concepción   nd [EMAIL PROTECTED]>  The va:481) java:473) 2) ’t e); us.es> ; , cessorImpl.java:39) ructorAccessorI...
   Author: Jeff Zhang, 2010-03-10, 14:22
What is the biggest problem of extremely large hadoop cluster ? - HDFS - [mail # dev]
...Hi ,  I am curious to know what is the biggest problem of extremely large hadoop cluster. What I can imagine now is the memory cost of meta data of hdfs in name node. One solution I can...
   Author: Jeff Zhang, 2010-02-21, 15:49
Re: HDFS File read issue - HDFS - [mail # user]
...Maybe you can use zookeeper to achieve this   On Mon, Jan 25, 2010 at 3:20 PM, MOHAMMED IRFANULLA S  wrote:     Best Regards  Jeff Zhang...
   Author: Jeff Zhang, 2010-01-25, 07:36
MiniDFSCluster in trunk can not run in windows platform ? - HDFS - [mail # dev]
...Hi all,  Today I run the MiniDFSCluster in trunk in windows, but it turn out it failed. (Because of the path problem) This is the error message: java.net.URISyntaxException: Illegal cha...
   Author: Jeff Zhang, 2009-10-15, 10:23
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB