Re: [Evolution-hackers] compression for folders?

[Jeffrey Stedfast <fejj ximian com>]

On Tue, 2004-05-04 at 11:51 -0500, todd fries net wrote:
> I'm not quite sure what the difference between archival and transparent
> compression would be.

the obvious answer is that with archived folders, the folders can be considered to be "read-only" which means compression won't really get in the way (performance wise) since the folders can be assumed to be read only "once in a while".

whereas, if you wanted to enable compression for your "in-use" (for lack of a better term?) folders, then it would be a significant enough problem to make it a pita because they are constantly being modified (appended to, expunged, etc).

Jeff

> I get the impression archival would be, well, not very useful if I
> wanted to see all emails from my wife since I've known her, for example.
> Would vfolders work on archives?  If so, then what is the difference
> between transparent compression and non transparent compression?
>
> BTW, you guys misread my statement.  I have 3gb of mbox files that are
> compressed already with 'bzip2 -9' ..
>
> In general, I never throw away email, because I have so much spam that I
> can't trust the auto filters to throw it away, and on more than one
> occasion important documents have been retrieved from the spam filter
> box, case in point the recent tax season saw the pdf email from my
> accountant show up in the spambox.
>
> Anyway, I need not justify to you guys why I have so much mail, only
> impress upon you that I do have so much mail that I wish to utilize
> evolution to access.
>
> I'm going to test out a port of 1.5 to OpenBSD and from there perhaps
> migrate to cvs head, from which I can consider developing transparent
> compression techniques.
>
> Looks like I'll be searching for the bug related to this ?? .. hopefully
> it isn't too small of a needle buried in too big of a proverbial
> haystack.
>
> On Sun, 2004-05-02 at 22:17, Not Zed wrote:
> > On Sun, 2004-05-02 at 12:53 +0300, Enver ALTIN wrote: 
> > > On Fri, 2004-04-30 at 11:17 -0500, Todd T. Fries wrote:
> > > > I am now using evolution 1.2 on OpenBSD for whatever that is worth, and
> > > > have about 3gb of bz2 compressed files to move into evolution folders.
> > > 
> > > Isn't 1.2 a bit outdated to talk about?
> > > 
> > > > Are there any mechanisms proposed or existing to compress email folders?
> > > 
> > > Not yet, and the very common answer for similar/related questions in the
> > > past was: "No, and it's not planned anytime soon". Transparent
> > > compression will probably break vfolder and searching facilities causing
> > > a lot more usability and long term maintenance problems. I doubt Gerardo
> > > will like the idea :)
> > Well transparent compression would be ... transparent, so everything
> > would still work if it was done properly.
> > 
> > My take on it is that it just isn't worth it on its own - hard drives
> > are SO cheap these days.
> > 
> > If you've got 3GB of email lying around it sounds like its actually
> > archival you're after ... i'd certainly support some sort of
> > development of compressed archive mode folder stuff.
> > 
> > i.e. not just a general folder compression option, but a special
> > backend for archival and/or hsm storage.
> > 
> > 
> > 
> > Michael Zucchi
> > <notzed ximian com>
> > 
> > Ximian Evolution and
> > Free Software Developer
> > 
> > 
> > Novell, Inc.
> -- 
> Todd Fries .. todd fries net
>
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-- 
Jeffrey Stedfast
Evolution Hacker - Novell, Inc.
fejj ximian com  - www.novell.com