Stef wrote:
Big_Al wrote:

Stef wrote on 6/3/2015 11:56 AM:
Keith Nuttle wrote:

In reviewing the need to upgrade to Windows 10 from 8.1, the question
comes up about the size of the Windows 10 installation on an existing
8.1 install?

Will Windows 10, increase the size of the OS install appreciably.


What about a tablet will a Windows 10 install increase the size of the
OS install on a tablet? (HP Stream 7 32 gb)
As far as specific numbers, no one will know exactly until the final W10
is released. And, of course, it will depend on which one you get. But!
Ask yourself this: When has a new Windows release's footprint ever
been SMALLER than the previous release?

Stef

My clean install of the Preview 10122 (+/-) was only 13G. With a few,few,
programs. Can't say if that is smaller
than my virgin 8.1 with pgms or not.

We'll just have to wait and see. Hopefully, W10 will only be marginally
larger than 8 or 8.1, since it's mostly the same code, and NOT like
Vista was to XP. However, I consider 13GB still pretty large, but then
I'm spoiled. With Linux I'm used to half that including all the
applications. Windows has always had big feet. ;-)

Stef

On a tablet, a different scheme is used.

Tablets now use WIM-boot. The install.wim stays
compressed, and is decompressed on demand. Deltas
to the read-only install.wim are stored in a
persistent file system. This should sound
familiar to you. And you know what inspired
such a scheme and "who did it first".

In that case, the cost of the install is 3.5GB,
the same size as the installation DVD in fact.

After the OS has been running for a year, naturally
it's grown a bit. You can't deliver a couple hundred
patches in a year, without storage space for them.
Those would sit in the persistent store.

I would "like to be a fly on the wall", to see
how they're going to upgrade a WIM-boot :-) Should
be fun.

Paul