Re: File access pattern on HDFS?

2011-03-07 Thread Gautam Singaraju
HDFS-782 is slightly relevant to maintaining a 'hot-zone' info, > > although at a block level and among datanodes. I couldn't find a jira > > that talks about keeping a list of atime modifications on the > > NameNode. > > > > On Mon, Mar 7, 2011 at 4:00 AM,

File access pattern on HDFS?

2011-03-06 Thread Gautam Singaraju
Hi, Is there a mechanism to get the list of files accessed on HDFS at the NameNode? Thanks! --- Gautam

Re: Checksum of blocks

2010-08-03 Thread Gautam Singaraju
ld refer the javadoc here: > http://hadoop.apache.org/common/docs/current/api/org/apache/hadoop/fs/ChecksumFileSystem.html > > Hope this helped. > > Regards, > Krishnakumar. > On Jul 31, 2010, at 10:10 PM, Gautam Singaraju wrote: > >> Hello all, >> >> From HDFS

Checksum of blocks

2010-07-31 Thread Gautam Singaraju
Hello all, >From HDFS Architecture page (http://hadoop.apache.org/common/docs/current/hdfs_design.html): "When a client creates an HDFS file, it computes a checksum of each block of the file and stores these checksums in a separate hidden file in the same HDFS namespace." Is there a way to access