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Date: Thu, 15 Jun 2006 09:58:08 -0700
From: Mike Matrigali <mikem_app@sbcglobal.net>
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To: derby-dev@db.apache.org
Subject: Re: [Enhancement] Name the ' db.lck'  file within a booted db to
 be '.db.lck'
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Note that this change is not as easy as it seems.  I believe there
are all sorts of upgrade issues.  I don't think it is possible to
change the name in 10.1 as 2 different versions of CS running in
different jvms won't agree on the object they are locking.

I guess for a hard upgrade one could lock both files, and for
db's booted that have already been upgraded to 10.2 one should
be able to lock the new name.

Does anyone know if java guarantees that files starting with "." is
a valid filename on all the platforms.  We have in the past tried
to be very safe in our filename choices - mostly trying for 8.3
standard.

Rajesh Kartha wrote:
> Hi,
> 
> I was wondering, if we could  name the 'db.lck' file within a Derby 
> database  to be '.db.lck'  to indicate the db has been booted.
> 
> By appending a '.' before the file name most of the OSes will consider 
> it as a hidden file and will not show
> in the default directory listing unless an 'ls -a' is used. This can 
> avoid unwanted/accidental deletion of this file on Linux/Unix.
> 
> I will open a JIRA enhancement request to track this.
> 
> Regards,
> Rajesh
> 
> 
> 
> 
> 
> 
>