[lfs-support] xz: No such file or directory
Thomas de Roo
thomas at de-roo.org
Wed Jan 2 06:54:41 PST 2013
On 01/02/13 13:05, Ken Moffat wrote:
> On Tue, Jan 01, 2013 at 05:15:14PM -0800, JIA Pei wrote:
>> But, what do you mean by *(e.g. leaving the system, and reloading it) *?
>> do you mean *load and remove a module* ?
> No, I meant shutting down the system. Or unmounting the card
> where you are building LFS.
>> BTW, why those USB flash or SD card are not intended for long-term use?
>> What is the trend then? Currently, all popular boards Pandaboard,
>> Beagleboard, RPI, are all using SD card for booting..... Can you help to
>> explain why you said that?
> Solid-state storage has a finite number of read/write cycles. If
> the filesystem is designed for solid-state storage it will work
> around this. A regular filesystem such as ext4 or xfs will cause a
> lot of extra writes.
> Embedded boards use these cards because they are small and cheap -
> for development, I guess it is a simple matter to replace the card
> if it wears out. For deployed embedded linux systems you can set
> them up so that things which write to "disk" write to memory in a
> tmpfs - perhaps without saving it on shutdown. 'Live' distros for
> use on usb sticks will use these techniques.
> So, for a simple system, such as a firewall, I think you can expect
> reasonable life - provided you do not log to the "disk", and do not
> compile on it. If I was trying this I would develop on a real disk,
> then copy that system to a card once it appeared to work.
> But _building_ a system from source is different - an enormous
> number of files are extracted from tarballs, compiled to object
> files, then linked to new executables and libraries. This is what
> uses up the erase cycles of the solid-state storage.
Going off topic... I was surprised to see the offical Raspberry Pi
Linuxdistribution Raspbian installs a swapfile on an SD-card. Not a good
idea I think.
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