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HDFS, mail # user - file replicas


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Alieh Saeedi 2012-02-04, 10:34
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RE: file replicas
Uma Maheswara Rao G 2012-02-04, 12:27
Presently don't have such direct api available. May be you can write your own. Yes, below api can help.
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From: Alieh Saeedi [[EMAIL PROTECTED]]
Sent: Saturday, February 04, 2012 4:04 PM
To: [EMAIL PROTECTED]
Subject: file replicas

Thank you
Is there a method which list for me files with n replicas or I myself must implement it? If so just FileSystem#getFileBlockLocations() can help me?
Thanks in advance:-)

________________________________
From: Uma Maheswara Rao G <[EMAIL PROTECTED]>
To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>; Alieh Saeedi <[EMAIL PROTECTED]>
Sent: Saturday, 4 February 2012, 13:36
Subject: RE: file replication
1- How can I replicate an existing file by an application?
[Uma Ans] : you can just set the replication factor high.
            use the following API for resetting the replication factor from application.
            FileSystem#setReplication

2- Where is the number of replicas for each file saved? I mean how can I find out number of replicas for a specific file?
Regards
[Uma Ans] : FileSystem#getFileBlockLocations should give you the locations where it stored.

Regards,
Uma
________________________________________
From: Alieh Saeedi [[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>]
Sent: Saturday, February 04, 2012 3:07 PM
To: [EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>
Subject: file replication

1- How can I replicate an existing file by an application?
2- Where is the number of replicas for each file saved? I mean how can I find out number of replicas for a specific file?
Regards