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Compressing an OS image with the help of LZO algorithm

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Compressing an OS image with the help of LZO algorithm

Postby jacus » Mon Mar 06, 2006 10:56 am

Hello,

By default an OS image is compressed in the UCL format.
How can I change compression algorithm to the LZO mode?

Regards,
Jacek
jacus
Senior Member
 
Posts: 239
Joined: Tue Apr 22, 2003 8:36 am

Re: Compressing an OS image with the help of LZO algorithm

Postby jacus » Tue Mar 07, 2006 7:53 am

I mean OS image ganerated by the mkifs command.
Is it possible to force LZO compression for it ?

Jacek

U¿ytkownik "Jacek Rudnicki" <jacek.rudnicki@quantum.com.pl> napisa³ w
wiadomo¶ci news:duh3s6$r6d$1@inn.qnx.com...
Hello,

By default an OS image is compressed in the UCL format.
How can I change compression algorithm to the LZO mode?

Regards,
Jacek

jacus
Senior Member
 
Posts: 239
Joined: Tue Apr 22, 2003 8:36 am

Re: Compressing an OS image with the help of LZO algorithm

Postby Armand C. » Wed Mar 08, 2006 8:43 am

With the IDE, in the System builder perspective you can select the
compression type in the "Properties" panel when you select your .bld file.

With command line, you can try to add this to your build file
[compress=0] No compression
[compress=1] Zlib
[compress=2] LZO
[compress=3] UCL

Armand

Jacek Rudnicki wrote:
I mean OS image ganerated by the mkifs command.
Is it possible to force LZO compression for it ?

Jacek

U¿ytkownik "Jacek Rudnicki" <jacek.rudnicki@quantum.com.pl> napisa³ w
wiadomo¶ci news:duh3s6$r6d$1@inn.qnx.com...

Hello,

By default an OS image is compressed in the UCL format.
How can I change compression algorithm to the LZO mode?

Regards,
Jacek




Armand C.
 

Re: Compressing an OS image with the help of LZO algorithm

Postby jacus » Thu Mar 09, 2006 9:05 am

That was very easy.

With command line, you can try to add this to your build file
[compress=0] No compression
[compress=1] Zlib
[compress=2] LZO
[compress=3] UCL

Is it documented somewhere ?

Thank you,
Jacek


Uzytkownik "Armand C." <no@mail.com> napisal w wiadomosci
news:dum4qq$cts$1@inn.qnx.com...
With the IDE, in the System builder perspective you can select the
compression type in the "Properties" panel when you select your .bld file.

With command line, you can try to add this to your build file
[compress=0] No compression
[compress=1] Zlib
[compress=2] LZO
[compress=3] UCL

Armand

Jacek Rudnicki wrote:
I mean OS image ganerated by the mkifs command.
Is it possible to force LZO compression for it ?

Jacek

U¿ytkownik "Jacek Rudnicki" <jacek.rudnicki@quantum.com.pl> napisa³ w
wiadomo¶ci news:duh3s6$r6d$1@inn.qnx.com...

Hello,

By default an OS image is compressed in the UCL format.
How can I change compression algorithm to the LZO mode?

Regards,
Jacek



jacus
Senior Member
 
Posts: 239
Joined: Tue Apr 22, 2003 8:36 am

Re: Compressing an OS image with the help of LZO algorithm

Postby Steve Reid » Thu Mar 09, 2006 1:59 pm

Jacek Rudnicki <jacek.rudnicki@quantum.com.pl> wrote:
That was very easy.

With command line, you can try to add this to your build file
[compress=0] No compression
[compress=1] Zlib
[compress=2] LZO
[compress=3] UCL

Is it documented somewhere ?

I don't think so. I'll create a PR.

------------------------------------------
Steve Reid stever@qnx.com
Technical Editor
QNX Software Systems
------------------------------------------
Steve Reid
 

Re: Compressing an OS image with the help of LZO algorithm

Postby Steve Reid » Thu Mar 09, 2006 2:59 pm

Steve Reid <stever@stevernto.ott.qnx.com> wrote:
Jacek Rudnicki <jacek.rudnicki@quantum.com.pl> wrote:
That was very easy.

With command line, you can try to add this to your build file
[compress=0] No compression
[compress=1] Zlib
[compress=2] LZO
[compress=3] UCL

Is it documented somewhere ?

I don't think so. I'll create a PR.

One of the developers told me that the startup library uses UCL, and those
other options won't work unless you have a special version of the library.
So, you should consider the "compress" attribute to be a boolean as the
docs for mkifs say.

------------------------------------------
Steve Reid stever@qnx.com
Technical Editor
QNX Software Systems
------------------------------------------
Steve Reid
 

Re: Compressing an OS image with the help of LZO algorithm

Postby jacus » Fri Mar 10, 2006 7:24 am

One of the developers told me that the startup library uses UCL, and those
other options won't work unless you have a special version of the library.
So, you should consider the "compress" attribute to be a boolean as the
docs for mkifs say.

No problems with creating custom startup library and uncompressing OS image.

Thank's,
Jacek
jacus
Senior Member
 
Posts: 239
Joined: Tue Apr 22, 2003 8:36 am

Re: Compressing an OS image with the help of LZO algorithm

Postby jacus » Fri Mar 10, 2006 7:28 am

U¿ytkownik "Steve Reid" <stever@stevernto.ott.qnx.com> napisa³ w wiadomo¶ci
news:dupccd$jgm$1@inn.qnx.com...
Jacek Rudnicki <jacek.rudnicki@quantum.com.pl> wrote:
That was very easy.

With command line, you can try to add this to your build file
[compress=0] No compression
[compress=1] Zlib
[compress=2] LZO
[compress=3] UCL

Is it documented somewhere ?

I don't think so. I'll create a PR.

That will be useful especialy for people who are using standard release of
QNX Momentics dev. seat. Where everything is done from the command line; no
IDE.

Regards,
Jacek
jacus
Senior Member
 
Posts: 239
Joined: Tue Apr 22, 2003 8:36 am


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