New Mylivecd -- Discussion

[Was_Just19]

The new mylivecd package which has enhancements for working with newer kernels -- a higher compression -- is hitting the mirrors.

See announcement

http://www.pclinuxos.com/forum/index.php/topic,89314.0.html



My question is this .......

when using a LiveUSB device, the size limitations are not as stringent as when using a CD, so is it true to say that using   gzip   compression when creating the ISO, would give faster results than   xz   compression during use in live mode?


regards.

[Neal ManBear]

Using gzip will make creating the ISO go faster. The resulting ISO will be larger, too.
In actual use, I've not tested yet, but I think it could be faster by a small margin. I guess it needs to be tested against various combinations of hardware to be able to say if it is or not.

[tschommer]

Using the xz option, I created a livecd iso. It took about 30 minutes, and after making a live usb and booting it up, it worked just fine.

Using the gzip option used cost me about 5 percent space, but it was done in only 7 minutes. Oh yeah, also booted and worked without problems.

Since both isos are more than 2gb and I don't care about the space issue, I'll go with gzip for now 

Torsten

[Was_Just19]

Using the xz option, I created a livecd iso. It took about 30 minutes, and after making a live usb and booting it up, it worked just fine.

Using the gzip option used cost me about 5 percent space, but it was done in only 7 minutes. Oh yeah, also booted and worked without problems.

Since both isos are more than 2gb and I don't care about the space issue, I'll go with gzip for now 

Torsten

Thanks for the report 

Is there any difference in the speed of operation between the two OSs/ISOs when run from a USB flash stick? .......  xz Vs gzip ?

Thanks

[Texstar]

Using the xz option, I created a livecd iso. It took about 30 minutes, and after making a live usb and booting it up, it worked just fine.

Using the gzip option used cost me about 5 percent space, but it was done in only 7 minutes. Oh yeah, also booted and worked without problems.

Since both isos are more than 2gb and I don't care about the space issue, I'll go with gzip for now 

Torsten

Torsten what kernel were you using?

[tschommer]

I've got the 2.6.38.2-pclos1.pae.bfs kernel on an AMD box (Phenom II X6 1055T) with 4GB memory.

[tschommer]

Using the xz option, I created a livecd iso. It took about 30 minutes, and after making a live usb and booting it up, it worked just fine.

Using the gzip option used cost me about 5 percent space, but it was done in only 7 minutes. Oh yeah, also booted and worked without problems.

Since both isos are more than 2gb and I don't care about the space issue, I'll go with gzip for now 

Torsten

Thanks for the report 

Is there any difference in the speed of operation between the two OSs/ISOs when run from a USB flash stick? .......  xz Vs gzip ?

Thanks

I have the impression that the gzip iso is much faster - booting, logging into KDE, browsing in Firefox, file manager, just about everything.

I think I'll get myself another USB stick and try it again from scratch, just so I can compare both more or less side by side.

Torsten

[Was_Just19]

Using the xz option, I created a livecd iso. It took about 30 minutes, and after making a live usb and booting it up, it worked just fine.

Using the gzip option used cost me about 5 percent space, but it was done in only 7 minutes. Oh yeah, also booted and worked without problems.

Since both isos are more than 2gb and I don't care about the space issue, I'll go with gzip for now 

Torsten

Thanks for the report 

Is there any difference in the speed of operation between the two OSs/ISOs when run from a USB flash stick? .......  xz Vs gzip ?

Thanks

I have the impression that the gzip iso is much faster - booting, logging into KDE, browsing in Firefox, file manager, just about everything.

I think I'll get myself another USB stick and try it again from scratch, just so I can compare both more or less side by side.

Torsten

Thanks ......  I thought it might be faster due to less effort required to decompress while running.

Please do post back any further details you may gather.

regards.

[Texstar]

Initial tests using MiniME Livecd with Kernel 2.6.38.2 bfs - mylivecd - 0.9.3-13 and squashfs-tools-4.2-4

Dual Core AMD system with 2 gigs of ram.

mylivecd --gzip --md5sum test-gzip.iso  created in 4:30 minutes Size: 569mb - Boot OK

mylivecd --xz --md5sum test-xz.iso created in 9:35 minutes Size: 491 mb - Boot OK

Edit: (using max xz compression)
mylivecd --ms5sum test-xz-max.iso created in 18:38 minutes Size 475 mb - Boot OK


For fun:

mylivecd --lzma --md5sum test-lzma.iso created in 7:39 minutes Size: 491 mb - Boot Failed (Anticipated this)

[pinoc]

note, if you do not specify a compression then the default is used (xz with maximum compression options) which, compared to specifying the compression option xz, is about another 10% slower and you will gain another 5% space.
leaving Vancouver and checking in to Portland...
-p.

[mahmoodkamal]

i am trying to use mylivecd for the first time. Will it make a bootable ISO only or it will also include my home folder (data) also?

[Was_Just19]

i am trying to use mylivecd for the first time. Will it make a bootable ISO only or it will also include my home folder (data) also?

It will attempt to include everything that is mounted in the OS, unless specifically excluded.

So I would suggest using, from a terminal, as root

umount -a

to unmount all mounted partitions except the root and /home partitions.

If you wish to exclude parts of the /home partition then use the   --nofile & --nodir  options to specify them.

In a terminal

mylivecd --help

should give you the available options.

regards.

[mahmoodkamal]

thanks. just to satisfy my curiosity, what is the difference between mylivecd and remasterme? both appear to do the same 

[Neal ManBear]

thanks. just to satisfy my curiosity, what is the difference between mylivecd and remasterme? both appear to do the same 

The script "remasterme" was created to work with mklivecd, from 2009 and earlier. Neither is available in 2010. We use mylivecd now.