DO NOT REPLY [Bug 7249] New: Add an option to use O_NOATIME

samba-bugs at samba-bugs at
Sun Mar 14 16:08:52 MDT 2010

           Summary: Add an option to use O_NOATIME
           Product: rsync
           Version: 3.1.0
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P3
         Component: core
        AssignedTo: wayned at
        ReportedBy: at
         QAContact: rsync-qa at

Some systems (at least Linux since 2.6.8) have the O_NOATIME open flag that
avoids altering the atime of files opened for reading. An option to enable this
flag is supported would be useful for backup systems based on rsync, as it
would avoid interfering with tools that relies on atime (such as new mail
detection, whatever may be thought about the correctness of the method) and
reduce disc activity on the source filesystem.

We use a patched rsync that always sets O_ATIME with rsnapshot since quite some
time and we have not noticed any drawback.

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