Optimising pxeboot disk size
Paul B. Mahol
onemda at gmail.com
Tue Dec 16 07:15:44 PST 2008
On 12/16/08, Wojciech Puchar <wojtek at wojtek.tensor.gdynia.pl> wrote:
>>> it's simple:
>> More simple when you tell it ;-) Thanks a lot, i will try it tonight !
> it doesn't have chance - must work :)
>>> I wish it's helpful, doing this doesn't just save space but saves time -
>>> you have to upgrade software once.
>> So preserving consistency, which is the most important when you have lot
>> diskless stations !
> exactly. i'm using just NetBSD 1.5 (uses LITTLE memory) + Xserver, so
> there are almost no updates, but anyway - it's stored once.
>>> you may like to make /etc-common directory and put most of files there,
>>> symlinks in each station's /etc
>> In fact, it makes me think that we miss a concept in mount, or at least i
>> don't know it currently :
>> imagine a -tl (TransparentLayer) option for mount, allowing to mount
>> source to the same directory, for instance /etc :
> there is already such think - mount_unionfs
> but i don't use it.
> if you mount over some directory - it's original contents (like my /etc/rc
> doing exec /systemrc) gets hidden.
>> mount -r yournfsserver:/basic/etc /etc
>> mount -tl -r yournfsserver:/TypeX/etc /etc
>> mount -tl -r yournfsserver:/StationY/etc /etc
> but i don't know how stable it is.
>> When you want to change something, you add a rw TransparentLayer :
>> mount -tl yournfsserver:/StationYchanges/etc /etc
>> So that changed or added files are only stored in this rw partition, thus
>> very small and easy to manage.
>> This would be a kind of partition inheritance, like in object languages...
>> Dreams are allowed :-)
> try mount_unionfs
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