Experimental Physics and
Industrial Control System

>>> On 3/21/2002 at 10:39:16 MST, Deb Kerstiens wrote:

  > I'm puzzled that "mv"ing the file results in having the logServer
  > continue to write to the file in the new location, though. Maybe
  > there's some system magic that keeps track of the file as long as it
  > remains open for writing??

Not magic, just standard Unix-style file I/O.  The file descriptor points
to an "inode", not a physical disk location.  When you "mv" the file, the
contents of the inode are modified to point to the new location, but it's
still the same inode.  The "mv" is invisible to anyone who already has the
file open.

----
Brian McAllister                    Controls Programmer/Beam Physicist
[email protected]                        MIT-Bates Linear Accelerator
(617) 253-9537                                           Middleton, MA

Replies:

Re: EPICS iocLog file size limitation Steve Lewis

References:

Re: EPICS iocLog file size limitation Deb Kerstiens

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