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Re: ClientProtocol create、mkdirs 、rename and delete methods are not Idempotent - MapReduce - [mail # user]
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...On 4 November 2012 17:25, lei liu wrote: When you say "idempotent", I presume you mean the operation happens "at-most-once"; ignoring the degenerate case where all request...
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Author: Steve Loughran,
2012-11-04, 19:34
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Re: Unable to Add Jars to distributed cache - MapReduce - [mail # user]
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...On 31 October 2012 12:13, Saurabh Mishra wrote: (0.20.0) is a pretty old Hadoop version -you'd be best of downloading Hadoop 1.10 -it will have the Distribute Cache APIs...
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Author: Steve Loughran,
2012-10-31, 18:11
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Re: DataNodes fail to send heartbeat to HA-enabled NameNode - MapReduce - [mail # user]
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...On 30 October 2012 11:10, Takahiko Kawasaki wrote: look like you've been the first person to find an issue in some code that is very, very fresh. File a bug report on JIRA;...
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Author: Steve Loughran,
2012-10-30, 17:06
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Re: Cluster wide atomic operations - MapReduce - [mail # user]
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...On 29 October 2012 01:15, David Parks wrote: s cussion, I'd go for UUID generation, which you can do in parallel -though it doesn't meet your range requirements...
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Author: Steve Loughran,
2012-10-29, 10:15
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Re: FAILED: Hive Internal Error - MapReduce - [mail # user]
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...On 27 October 2012 10:44, sagar nikam wrote: this is a hive question. Please don't cross post to general@hadoop or user@hadoop. thanks...
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Author: Steve Loughran,
2012-10-27, 10:15
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Re: reference architecture - MapReduce - [mail # user]
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...On 25 October 2012 23:17, Daniel Käfer wro te: Depends on the amount of data and expected use. If it's transient food for the next MR jobs: HDFS...
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Author: Steve Loughran,
2012-10-26, 17:25
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Re: HDFS HA IO Fencing - MapReduce - [mail # user]
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...On 26 October 2012 15:37, Todd Lipcon wrote: +1. This is why you are told to mount your shared edit log NFS servers with the "soft" option -otherwise you can't swap over ...
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Author: Steve Loughran,
2012-10-26, 17:23
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Re: reference architecture - MapReduce - [mail # user]
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...On 25 October 2012 20:24, Daniel Käfer wro te: I quite like the new Hadoop in Practice for a lot of that, especially the answer to #2, "how to store the data", where he looks at...
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Author: Steve Loughran,
2012-10-25, 21:10
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Re: HDFS HA IO Fencing - MapReduce - [mail # user]
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...On 25 October 2012 14:08, Todd Lipcon wrote: on any OS running in any virtual environment, including EC2, time is entirely unpredictable, just to make things worse. On a s...
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Author: Steve Loughran,
2012-10-25, 18:23
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Re: Large input files via HTTP - MapReduce - [mail # user]
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...data ingress is often done as an initial MR job. Here is sounds like you'd need -a list of URLs, which you can have a single mapper run through and map to (hostname,url) wh...
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Author: Steve Loughran,
2012-10-22, 08:47
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