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[expand - 1 more] - Re: Regarding design of HDFS - HDFS - [mail # user]
...2011/9/13 kang hua    I said this because meta-data is updated often.  Caching in the presence of high updates requires some sort of coherency model.  For meta-data, it i...
   Author: Ted Dunning, 2011-09-13, 11:20
Re: set reduced block size for a specific file - HDFS - [mail # user]
...There is no way to do this for standard Apache Hadoop.  But other, otherwise Hadoop compatible, systems such as MapR do support this operation.  Rather than push commercial systems...
   Author: Ted Dunning, 2011-08-27, 19:42
Re: HDFS File being written - HDFS - [mail # user]
...Amen.  Without a solid hand-off, your system is going to be subject all kinds of failure modes.  On Wed, Aug 17, 2011 at 11:17 AM, David Rosenstrauch wrote:  ...
   Author: Ted Dunning, 2011-08-17, 18:20
Re: Running a server on HDFS - HDFS - [mail # user]
...HDFS is not a normal file system.  Instead highly optimized for running map-reduce.  As such, it uses replicated storage but imposes a write-once model on files.  This probabl...
   Author: Ted Dunning, 2011-07-12, 14:51
Re: How to create a lot files in HDFS quickly? - HDFS - [mail # user]
...First, it is virtually impossible to create 100 million files in HDFS because the name node can't hold that many.  Secondly, file creation is bottle-necked by the name node so the files...
   Author: Ted Dunning, 2011-05-30, 03:52
Re: silent data loss during append - HDFS - [mail # dev]
...What version are you using?  On Thu, Apr 14, 2011 at 3:55 PM, Thanh Do  wrote:  ...
   Author: Ted Dunning, 2011-04-14, 23:23
Re: keeping an active hdfs cluster balanced - HDFS - [mail # user]
...How large a cluster?  How large is each data-node?  How much disk is devoted to hbase?  How does your HDFS data arrive?  From one or a few machines in the cluster?  ...
   Author: Ted Dunning, 2011-03-17, 21:23
Re: Will blocks of an unclosed file get lost when HDFS client (or the HDFS cluster) crashes? - HDFS - [mail # user]
...What do you mean by block?  An HDFS chunk?  Or a flushed write?  The answer depends a bit on which version of HDFS / Hadoop you are using.  With the append branches, thin...
   Author: Ted Dunning, 2011-03-14, 01:17
Re: hbase and hdfs - HDFS - [mail # user]
...Take a look at http://opentsdb.net/ and see if it attacks your time series problem in an interesting way for what you are doing.  Regarding your second comment, Zookeeper actually makes...
   Author: Ted Dunning, 2011-03-08, 15:22
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