Estimate iso size

[Taco.22]

Is there a way of estimating the final iso size, or is it a case of trial and error?  I am trying to restrict a remaster to cd size, and was just wondering.  I tried various search terms in the forum but couldn't come up with anything.  Can't seem to find anything on the net either.

[pinoc]

there is no definitive guide because the final iso-size depends on the compressibility of the installed applications, a rough rule of thumb is: iso-size = size of installed system / 3.  For example the FullMonty master is 12.1 GB and the resulting iso is 4.0GB. So for a CD-rom your installed system should not be larger than 2.0 GB (again, depending on the compressibility of what is installed it might even work with 2.5GB). You should also ensure to clean and unmount unnecessary folders, more info on that is provided in this forum section.
hope this helps,
-p.

[Neal ManBear]

I have remastered 2.7 GB and had a CD sized ISO. The size would have been larger had I added anything to /home. I used the default directories in /home/guest only. I chose the apps carefully, too, taking into account what dependencies each brought in and estimates of compressibility of each.

Generally, personal files may be what is most resistant to being compressed.

[Taco.22]

rough rule of thumb is: iso-size = size of installed system / 3.  For example the FullMonty master is 12.1 GB and the resulting iso is 4.0GB

That's about what I'm working to - 2.1gig condenses to just under 700mb.  It's when you create a live cd and you have a spare 50mb - how much more can you squeeze in ?!? Yep, trial and error.

The size would have been larger had I added anything to /home

I know what you're saying Neal - fortunately this is a system remaster, otherwise bye-bye cd!  Mind you, got to be careful with /etc/skel.
   

[Neal ManBear]

rough rule of thumb is: iso-size = size of installed system / 3.  For example the FullMonty master is 12.1 GB and the resulting iso is 4.0GB

That's about what I'm working to - 2.1gig condenses to just under 700mb.  It's when you create a live cd and you have a spare 50mb - how much more can you squeeze in ?!? Yep, trial and error.

Is that 50mb on the CD? If so, around 150mb to 180mb installed should do it.

The size would have been larger had I added anything to /home

I know what you're saying Neal - fortunately this is a system remaster, otherwise bye-bye cd!  Mind you, got to be careful with /etc/skel.

Oh yes. One should always be careful with any edits in /etc, /skel or other.

[Taco.22]

Is that 50mb on the CD? If so, around 150mb to 180mb installed should do it.

A-ha - 50mb on the cd - you're quite right Neal - that's how I managed to squeeze in the Gimp.  Now I would have been right peeved at 705mb - that would have involved a bit of creative editing

And yes, with /skel I do have to remind myself about that - especially as I work with Openbox.  Too easy to "adjust" things and forget to move it across.   

[Neal ManBear]

..... Too easy to "adjust" things and forget to move it across.   

Ain't that the truth!