Gu Zheng <guz.fnst <at> cn.fujitsu.com> writes: > But it's hard to say that it also really can bring benefit to Squashfs. I did observe faster I/O in my daily use. The start up time of applications on my squashfs+aufs root filesystem generally decreased by 10% to 20% compared to lzo. Not very much, but the absence of lag with lz4 greatly improved user experience. > Yes, but the premise is that using LZ4 in Squashfs is better than lzo > in at least one actual situation. I update my squashfs image (about 8GB compressed) ~ once every month. Lz4 yields slightly worse compression ratio (+20%) than lzo but its compression speed is about fifty (no typo) times faster. In order to get rid of the endless waiting on "mksquashfs -comp lzo", I had to port Phillip's patch (in particular the "lz4_wrapper.c") to Linux 3.14.x so I can use lz4 compressed squashfs images everyday. > Let's look and see other guys' feedbacks, they are more persuasive.:) IMHO, a 50x boost of compression speed is persuasive. Lz4 also helped me to get rid of occasional lags on file I/O, greatly improved user experience with my Linux desktop. Adding lz4 support to squashfs isn't complicated. Everyone can review the patch in a couple of minutes. So I vote on its inclusion in mainline. Guan -- 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
