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Re: HDFS Ports - HDFS - [mail # user]
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...The read port of data node is random, but I think you can forbid the port on namenode becuase each read operation should access namenode first. On Fri, Sep 3, 2010 at 12:53 AM, Stephan...
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Author: Jeff Zhang,
2010-09-03, 08:13
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Where is reflection_limited_types.h in Thrift for Cpp - HDFS - [mail # user]
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...Hi all, I'd like to use the cpp thrift of hdfs, but find that there's no reflection_limited_types.h which is included by hadoopfs_types.h Best Regards Jeff Zhang...
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Author: Jeff Zhang,
2010-07-20, 07:54
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Re: Debug HDFS - HDFS - [mail # dev]
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...You can debug MiniDFSCluster which is for unit test of HDFS. On Mon, Jul 5, 2010 at 8:53 AM, Alberich de megres wrote: Best Regards Jeff Zhang...
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Author: Jeff Zhang,
2010-07-05, 16:05
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Who will interrupt PacketResonpder Thread ? - HDFS - [mail # user]
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...Hi all, In my data node logs, it says PacketResponder is interrupt,and it cuase my data node to re-register to namenode. The following is the log: (Anyone has any clues ? Thanks ...
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Author: Jeff Zhang,
2010-07-05, 05:30
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Source Code Question about blockReport - HDFS - [mail # dev]
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...Hi Hadoop Devs, I have one question about the blockReport DataNode send to NameNode. I think NameNode get the blockReport from DataNode, then it can tell DataNode which block is invali...
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Author: Jeff Zhang,
2010-06-22, 05:59
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Re: How to make command setrepr take effect on data node ? - HDFS - [mail # user]
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...So when will the replication happen ? Do you know which part of code control the replication ? Thanks. On Sun, Jun 13, 2010 at 11:10 AM, Eric Sammer wrote: Be...
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Author: Jeff Zhang,
2010-06-13, 03:18
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Re: How to make command setrepr take effect on data node ? - HDFS - [mail # user]
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...But when I invoke command fsck, it show that one replica is missing. So how can I force the replication ? On Sat, Jun 12, 2010 at 12:13 PM, Eric Sammer wrote: Best R...
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Author: Jeff Zhang,
2010-06-12, 04:18
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Re: Is it necessary to cache metadata in client side? - HDFS - [mail # user]
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...Per inputstream means the cache can only been used in the scope of one file. I think it's will be better if there's a cache in DFSClient. On Fri, Jun 11, 2010 at 5:02 PM, Todd L...
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Author: Jeff Zhang,
2010-06-11, 09:17
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How to make command setrepr take effect on data node ? - HDFS - [mail # user]
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...Hi all, The command bin/hadoop setrepr only affect the metadata in namenode. So How can I make it take effect on data node ? Thanks. Best Regards Jeff Zhang...
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Author: Jeff Zhang,
2010-06-11, 07:18
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Is it necessary to cache metadata in client side? - HDFS - [mail # user]
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...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 wan t...
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Author: Jeff Zhang,
2010-06-11, 06:43
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