---------- Forwarded message ---------- From: Marcin Szychowski <szycha@xxxxxxxxx> Date: 2014-11-27 15:50 GMT+00:00 Subject: Re: [PATCH 0/2] Squashfs: add LZ4 compression To: Bruno Wolff III <bruno@xxxxxxxx> Cc: Phillip Lougher <phillip@xxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, texstar@xxxxxxxxx, martin@xxxxxxxx, guanx.bac@xxxxxxxxx, dave@xxxxxxxxxxxxx, blyons@xxxxxxxxxxxxxxxxxxx, tokiclover@xxxxxxxxx, afm404@xxxxxxxxx, hugochevrain@xxxxxxxxx 2014-11-27 13:37 GMT+00:00 Bruno Wolff III <bruno@xxxxxxxx>: > > On Thu, Nov 27, 2014 at 08:00:47 +0000, > Phillip Lougher <phillip@xxxxxxxxxxxxxxx> wrote: >> >> >> My intention is to submit them in the next kernel merge window. >> If you want LZ4 support in Squashfs now is a good time to publically >> support the inclusion of these patches. > > > Fedora has been supporting LZ4 functionallity in mksquashfs and unsquashfs for about 6 months (in F19+), but the Fedora kernel team won't add support in the kernel until LZ4 support is accepted for the upstream kernel. Hello everyone, Squashfs is awesome piece of code. It’s potential usage pattern analysis could turn into pretty decent PhD thesis – from simple archival purposes through embedded systems, to dynamic nearly-instant multi-server software deployment systems, and many others. On the other hand, LZ4 is fantastic compression algorithm with well-known list of advantages. As I wrote to Phillip earlier, I have been using squashfs+lz4 / aufs to speed up my laptop (and reclaim some space, too). That would not be possible without LZ4: I could have gain some speed with LZO or disk space with gzip or xz, but not both. LZ4 is comparable with LZO in terms of decompression speed and with gzip in terms of compression ratios. LZ4 is much faster in both compression and in particular decompression speed than gzip (1-9) and xz (1-9). It is just the best choice for many storage-related purposes (see ZFS on Linux [https://github.com/zfsonlinux/zfs/commit/9759c60f1a1503e48dc5c45a209c3edd5758319f] and [http://wiki.illumos.org/display/illumos/LZ4+Compression]) I don’t quite get why does anyone need to be convinced to merge advantages of two fine pieces of code, since both have been already in the mainline kernel for some time now. It’s like being forced to choose between big car and safe car, or delicious food and good-looking food. It is not about forcing anyone to use something, it is about ease of choice. Having squashfs with lz4 in mainline kernel sounds like next natural step. Please do not hesitate to take it. -- Regards, Marcin Szychowski +48.791460067 http://adastor.pl -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
