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Operating Systems Solaris Zfs - what does atime update? Post 302954586 by Peasant on Wednesday 9th of September 2015 07:17:51 AM
Old 09-09-2015
By using stat command, you can see that information.

Code:
# stat somefile.txt
  File: `somefile.txt'
  Size: 9               Blocks: 2          IO Block: 512    regular file
Device: 475001dh/74776605d      Inode: 1161        Links: 1
Access: (0664/-rw-rw-r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2015-09-09 13:14:00.384836768 +0200
Modify: 2015-09-09 13:14:00.385346153 +0200
Change: 2015-09-09 13:14:00.385994348 +0200

If you change atime to off, the Access part will not be update when you access the file and you will gain minor to none performance depending on the filesystem structure.

Hope that helps
Regards
Peasant.
 

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RFSTAT(1)							Rfio User Commands							 RFSTAT(1)

NAME
rfstat - get information about a file or directory SYNOPSIS
rfstat directory rfstat filename DESCRIPTION
The rfstat program provides an interface to the shift remote file I/O daemon (rfiod) for getting information about a remote directory or file. The filename or directory argument is either a remote file name of the form: hostname:path or a local file name (not containing the :/ character combination). The output from the rfstat command gives information similar to that of the ls -il command for listing local files or directories, one field per line. EXAMPLE
rfstat /tmp Device : 802 Inode number : 2 Nb blocks : 16 Protection : drwxrwxrwt (41777) Hard Links : 13 Uid : 0 (root) Gid : 0 (root) Size (bytes) : 4096 Last access : Wed Jun 15 07:18:10 2011 Last modify : Wed Jun 15 07:18:10 2011 Last stat. mod. : Wed Jun 15 07:18:10 2011 SEE ALSO
rfio_stat(3), rfiod(1) NOTES
rfstat does not support regular expressions (regexp(5)) in the directory or filename argument. AUTHOR
LCG Grid Deployment Team LCG
$Date$ RFSTAT(1)
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