X-Git-Url: https://git.grml.org/?p=grml-live.git;a=blobdiff_plain;f=docs%2Fgrml-live.txt;h=f6c231d43545919903c3f2579f1f2290508962e4;hp=fe14de7b306f257ad550c2607aed9cf20294a1bb;hb=366cfc812f720252b4e5bab598870884394b2579;hpb=78c05688e3568ba363624bb6100540391f092862 diff --git a/docs/grml-live.txt b/docs/grml-live.txt index fe14de7..f6c231d 100644 --- a/docs/grml-live.txt +++ b/docs/grml-live.txt @@ -465,7 +465,7 @@ Current state of grml-live with squashfs-tools and kernel To make it easier to track problems this section documents current state of grml-live playing together with squashfs-tools / squashfs-lzma-tools (for building the compressed file) and the kernel version. Documentation of this -section is up2date by 03nd of september 2009, please report any bugs you +section is up2date by 7rd of september 2009, please report any bugs you encounter. Difference between squashfs-lzma-tools and squashfs-tools @@ -477,12 +477,12 @@ Grml builds use the LZMA compression. Squashfs-tools was introduced in Debian and once provided support for LZMA compression. Sadly LZMA compression within squashfs-tools became unsupported and -therefore squashfs-lzma-tools had to be introduced. Different kernel versions -provide different squashfs file formats (version 3.x for kernel versions until -2.6.28-grml[64], newer kernel versions use the 4.x format). +therefore squashfs-lzma-tools had to be introduced by the Grml team. Different +kernel versions provide different squashfs file formats (version 3.x for kernel +versions until 2.6.28-grml[64], since kernel 2.6.31-grml[64] it's the 4.x +format). -If you're wondering which package supports which option, here's a short -overview: +If you're wondering which package supports what, here's a short overview: * squashfs-tools 1:4.0-1: ZLIB as default, no LZMA support/options, file format version 4 @@ -493,64 +493,78 @@ version 3 * squashfs-tools 1:3.2r2-9exp1: LZMA as default, ZLIB support via -nolzma option, file format version 3 +* squashfs-lzma-tools 4.0-2: ZLIB as default, LZMA support via -lzma option, +file format version 4 + * squashfs-lzma-tools 3.3-1: LZMA as default, ZLIB support via -nolzma option, file format version 3 -* squashfs-lzma-tools 4.0-1: LZMA as default, no ZLIB support/options, file format 4 - Depending on the kernel version you want to use you need different versions squashfs-tools/squashfs-lzma-tools. Yes, that's pretty a mess (don't ask how much this sucks for us developers) - though this is supposed to calm down with the recent integration of squashfs file format 4 in the mainline kernel. Support for LZMA is pending and should dramatically simplify the situation for -developers as well as users. +developers as well as users as soon as it's available mainline. -Using squashfs-tools 1:4.0-1 on the build system -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Using squashfs-lzma-tools 4.0-2 on the build system +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -squashfs-tools 1:4.0-1 is available in Debian/unstable and Debian/testing. It -provides the mksquashfs and unsquashfs binaries and the package does NOT -conflict with the squashfs-lzma-tools 4.0-1 package (you can install both of -them at the same time). +squashfs-lzma-tools 4.0-2 is available via the grml repositories. It provides +the mksquashfs-lzma and unsquashfs-lzma binaries. The package does NOT conflict +with Debian's squashfs-tools package (you can install both of them at the same +time). -It provides support for the new squashfs file format version 4 and therefore -requires kernel versions newer than 2.6.28-grml[64]. +The packages can be downloaded from +link:http://deb.grml.org/pool/main/s/squashfs-lzma-tools/[http://deb.grml.org/pool/main/s/squashfs-lzma-tools/] -It does NOT support LZMA compression. If you need LZMA support please use -squashfs-lzma-tools instead. +It provides support for the new squashfs file format version 4 and therefore +requires kernel versions newer than 2.6.28-grml[64]. It supports LZMA as well as +ZLIB compression. Just use the defaults for enabling LZMA or use grml-live's +'-z' option if you want to use ZLIB instead. * Kernel 2.6.23-grml[64]: does not work * Kernel 2.6.26-grml[64]: does not work * Kernel 2.6.28-grml[64]: does not work -* Kernel 2.6.31-grml[64]: work in progress +* Kernel 2.6.31-grml[64]: works + +//////////////////////////////////////////////////////////////////////////////// +[IMPORTANT] + +Do NOT use a blocksize different than the default (131072 / 128kb). The kernel +will very probably oops then - so please do not touch the '-b' option of +mksquashfs. +//////////////////////////////////////////////////////////////////////////////// [NOTE] -Please use squashfs-tools 1:4.0-1 if you want to remaster grml releases -MORE RECENT than 2009.05 using the ZLIB compression. -Using squashfs-lzma-tools 4.0-1 on the build system -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Please use squashfs-lzma-tools >=4.0-2 from Grml if you want to remaster any +grml release being MORE RECENT than 2009.05. + +Using squashfs-tools 1:4.0-1 on the build system +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -squashfs-lzma-tools 4.0-1 is available via the grml repositories. It provides -the mksquashfs-lzma and unsquashfs-lzma binaries and the package does NOT -conflict with the squashfs-tools package (you can install both of them at the -same time). +squashfs-tools 1:4.0-1 is available in Debian/unstable and Debian/testing. It +provides the mksquashfs and unsquashfs binaries. The package does NOT +conflict with the squashfs-lzma-tools 4.0-2 package (you can install both of +them at the same time). + +The packages can be downloaded from +link:ftp://ftp.de.debian.org/debian/pool/main/s/squashfs/[ftp://ftp.de.debian.org/debian/pool/main/s/squashfs/] It provides support for the new squashfs file format version 4 and therefore requires kernel versions newer than 2.6.28-grml[64]. -It does NOT provide support for ZLIB compression. If you need ZLIB support -please use squashfs-tools 1:4.0-1 instead and use the '-z' option of grml-live -or set "SQUASHFS_OPTIONS='-nolzma'" in the grml-live configuration file. +It does NOT support LZMA compression. If you need LZMA support please use +Grml's squashfs-lzma-tools (see section above) instead. * Kernel 2.6.23-grml[64]: does not work * Kernel 2.6.26-grml[64]: does not work * Kernel 2.6.28-grml[64]: does not work -* Kernel 2.6.31-grml[64]: work in progress +* Kernel 2.6.31-grml[64]: works [NOTE] -Please use squashfs-lzma-tools 4.0-1 if you want to remaster grml releases -MORE RECENT than 2009.05 using the LZMA compression. +Please use squashfs-tools 1:4.0-1 only if you want to remaster grml releases +MORE RECENT than 2009.05 using the ZLIB compression. Using squashfs-lzma-tools 3.3-1 on the build system ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -676,7 +690,8 @@ Instructions mkdir -p /etc/grml/fai/config/basefiles/ mv base.tgz /etc/grml/fai/config/basefiles/I386.tar.gz - # install relevant tools: + # install relevant tools + # please check out http://grml.org/grml-live/#current_state when encountering problems! apt-get -o APT::Install-Recommends=false install grml-live squashfs-lzma-tools # adjust grml-live configuration for our needs: @@ -747,6 +762,43 @@ If you need help with grml-live or would like to see new features as part of grml-live you can get commercial support via link:http://grml-solutions.com/[Grml Solutions]. +[[lzma-vs-zlib]] +How much is the difference between LZMA and ZLIB compression? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +ISO size (bs = blocksize): + +[width="45%",cols="3,^2,^2,^2"] +|============================================================ +|ISO |LZMA (256kB bs) |LZMA (128kB bs)|ZLIB +|grml_sid |666M | WIP | 771M +|grml_squeeze |659M | WIP | 761M +|grml_lenny |624M | WIP | 723M +|grml64_sid |677M | WIP | 791M +|grml64_squeeze |671M | WIP | 785M +|grml64_lenny |639M | WIP | 745M +|grml-medium_sid |208M | WIP | 236M +|grml-medium_squeeze |206M | WIP | 234M +|grml-medium_lenny |193M | WIP | 220M +|grml64-medium_sid |213M | WIP | 245M +|grml64-medium_squeeze |213M | WIP | 244M +|grml64-medium_lenny |201M | WIP | 231M +|grml-small_sid |102M | WIP | 118M +|grml-small_squeeze |101M | WIP | 117M +|grml-small_lenny |97M | WIP | 112M +|grml64-small_sid |103M | WIP | 120M +|grml64-small_squeeze |103M | WIP | 120M +|grml64-small_lenny |99M | WIP | 116M +|============================================================ + +Build time of grml-medium's squashfs file (depends on your system, though just +to get the ratio between the different options): + +* 10 minutes and 4 seconds with LZMA default blocksize (128k) +* 7 minutes 27 seconds with LZMA and blocksize 256k +* 6 minutes and 8 seconds with LZMA blocksize 512k +* 1 minute and 40 seconds with ZLIB + [[install-local-files]] How to I install further files into the chroot/ISO? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~