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From Uma Maheswara Rao G <mahesw...@huawei.com>
Subject RE: file replicas
Date Sat, 04 Feb 2012 12:27:39 GMT
Presently don't have such direct api available. May be you can write your own. Yes, below api
can help.
________________________________
From: Alieh Saeedi [aliehsaeedi@yahoo.com]
Sent: Saturday, February 04, 2012 4:04 PM
To: hdfs-user@hadoop.apache.org
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 <maheswara@huawei.com>
To: "hdfs-user@hadoop.apache.org" <hdfs-user@hadoop.apache.org>; Alieh Saeedi <aliehsaeedi@yahoo.com>
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 [aliehsaeedi@yahoo.com<mailto:aliehsaeedi@yahoo.com>]
Sent: Saturday, February 04, 2012 3:07 PM
To: hdfs-user@hadoop.apache.org<mailto:hdfs-user@hadoop.apache.org>
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



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