Re: New APT version
Hi,
>>"Jason" == Jason Gunthorpe <jgg@gpu.srv.ualberta.ca> writes:
Jason> How do you intend to get the information? Examine the debs
Jason> after they are downloaded?
Well, I think that putting the information into the Packages
file is a bad idea -- especially for large packages. We need a line
per directory and there is no reason to inflate the packages files
for packages we ain't even updating.
So, yes, I was thinking of taking the .deb apart using ar and
looking at the sizes file; yes, it is slow, but I guess you can
either have ample disk space, or suffer while apt figures out whether
you have enough space left; so everyone else is only minimally
impacted ( a small one block file embedded in the .deb for most
packages).
Requires no retooling of dpkg, which I think is critical for
any scheme ;-). This method seems to be simple enough, and I think
meets our requirements.
Any sheme, which calculates whether there is enough space at
hand, shall need information about each package; since we do not know
mount schemes a priori [my /usr/lib/ is a separate partition from
/usr]; we need information about each dir (since the a mount point is
a dir). a compressed du -S format is about as compact as the
information can get. So, I think, from what I remember about my info
theory casses, this scheme is as optimal as we can reasonably
expect. (embedding the information in packages files. downloaded over
and over by apt, seems a horrible waste of bandwidth; at least, apt
only downloades packages we are going to install).
Jason> Maybe we need a /etc/apt/preinst that runparts would be called
Jason> on. Most people probably don't care (all the machines I
Jason> upgrade have lots of space)
I leave that up to you (ENV vartiable saying tight-on-space
would work ;-)
manoj
--
Democracy is that form of government where everybody gets what the
majority deserves. -- James Dale Davidson
Manoj Srivastava <srivasta@acm.org> <http://www.datasync.com/%7Esrivasta/>
Key C7261095 fingerprint = CB D9 F4 12 68 07 E4 05 CC 2D 27 12 1D F5 E8 6E
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