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From: hansen@pegasus.UUCP
Newsgroups: net.unix-wizards
Subject: Re: Undocumented features
Message-ID: <1354@pegasus.UUCP>
Date: Sat, 26-May-84 16:29:07 EDT
Article-I.D.: pegasus.1354
Posted: Sat May 26 16:29:07 1984
Date-Received: Fri, 1-Jun-84 01:11:00 EDT
References: <267@pcsbst.UUCP> <1942@rlgvax.UUCP> <518@opus.UUCP> <1948@rlgvax.UUCP>
Organization: AT&T Information Systems, Lincroft NJ
Lines: 23

When I saw the note about the file sync'ing undocumented feature, I thought
"Great! The people we have working on databases may have seen this, but if
they haven't, I'll pass the note on to them." They're replies:

> Person A:
> 
> Person B will correct me if I'm wrong, but I believe this is a bit we had
> already heard about.  It would be quite useful, except for one minor
> problem - it was put in for kernel use, and while it writes the data block
> synchronously, it does NOT write the inode before returning to the user.  It
> was too bad, we thought we had found something useful before Person B spent
> a few hours on the phone to [the USG UNIX people].
> 
> Person B:
> 
> Person A is correct about the utility (or lack thereof) of this feature.
> Thanks for the information though.

So BEWARE! If you use this "undocumented feature". There's a reason for it
being undocumented!

					Tony Hansen
					pegasus!hansen