[Fedora-livecd-list] [PATCH] v3 turboLiveInst

[Douglas McClendon]

Attached is an up to date revision of my turboLiveInst patch which 
incorporates the suggestions made during MarkMC's review.

Mark's executive summary of the feature:

   "Reduce installation time by not copying unused data to disk"

   "We avoid copying unused data by copying a filesystem image that has
    been reduced to the minimal possible size. This minimal image is not
    sufficient for a running LiveCD as applications need room to write
    more data, but the minimal image is efficiently created just before
    copying by applying a pre-calculated set of deltas to the original
    large filesystem image."

2nd revision post with performance numbers and decent descritpion:
(first two copy times are typo swapped)
http://www.redhat.com/archives/anaconda-devel-list/2007-July/msg00065.html

Mark's comments thread:
http://www.redhat.com/archives/fedora-livecd-list/2007-September/msg00007.html

The anaconda patch applies on top of the selinux bugfix I sent to 
anaconda-devel this morning, but there is no overlap.

The main things I'll mention that aren't directly related to the review 
thread above-

- I included a couple typo fixes to the documentation, as well as adding 
what seemed to be some appropriate additions.

- I included a slight cleanup of livecd-creator's resize2fsToMinimal. 
As discussed in the above thread, since the dumpe2fs code is going into 
anaconda for this patch, it seems to make sense to go ahead and include 
it in livecd-creator as well to remove the blocksize argument to 
resize2fsToMinimal, and have it calculate implicitly instead.

- I had to move the anaconda resize2fs invocation, as now the filesystem 
starts out full, and before resize2fs cannot even have mountpoint 
directories made in it.  Even outside turboLiveInst this is a valid 
thing to do.

- renamed the main function from turboLiveInst to genMinInstDelta

- removed option for ignore-deleted, and didn't bother with option for 
turboliveinst.  The liveinst.sh code gracefully handles the legacy 
configuration of no delta file.

- still not yet being a rawhide user, I tested this on an F7 livecd 
spin, generated with this git livecd-tools.  I used the patch to patch 
the installed anaconda.  It worked in a test under qemu.  (sparse disk 
file with du -cms showed that only ~2.2G of data was written).

- I expect, that even just looking at it myself over the next couple 
days I'll probably find one or two things to change.  Please give me any 
feedback about any possible improvements you can think of.  If you have 
a rawhide livecd spinning enironment handy and want to test it, that 
would be greatly appreciated.

Enjoy...

-dmc/jdog

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