Processing to add/create real fields in an existing file

[Kenneth Brody]

John Esak wrote:
[...]
> I'm coming in late on this thread... this is the only message I've seen.
> Autoshuf can do the trick, along with rewriting the required map(files)...
> but to do this "live" while other things might need to be posting to this
> file would be (essentially) suicide.  You need an absolutely quiescent
> period when the file will not be needed by any other process while
> auto-shuffling happens. If this can be arranged, the whole thing can easily
> be orchestrated/programmed.
> 
> Not knowing anything about the need in question... this much I know about
> autoshuf.

Well, autoshuf will refuse to run if someone is using the file, and other
programs will refuse to use the file if autoshuf is running.  Unless, of
course, your users are in the habit of "I got a 'file in use' error, so I
unlocked it".

-- 
+-------------------------+--------------------+-----------------------------+
| Kenneth J. Brody        | www.hvcomputer.com |                             |
| kenbrody/at\spamcop.net | www.fptech.com     | #include <std_disclaimer.h> |
+-------------------------+--------------------+-----------------------------+