* Paul Jackson <[EMAIL PROTECTED]> wrote: > These 16817 files consume: > > 224 MBytes uncompressed and > 95 MBytes compressed > > (using zlib's minigzip, on a 4 KB page reiserfs.)
that's a 42.4% compressed size. Using a (much) more CPU-intense compression method (bzip -9), the compressed size is down to 45 MBytes. (a ratio of 20.2%) using default 'gzip' i get 57 MB compressed. > Since each change will get its own copy of the file, multiplying these > two sizes (224 and 95) by 12.2 changes per file means the disk cost > would be: > > 2.73 GByte uncompressed, or > 1.16 GBytes compressed. with bzip2 -9 it would be 551 MBytes. It might as well be practical on faster CPUs, a full tree (224 MBytes, 45 MBytes compressed) decompresses in 24 seconds on a 3.4GHz P4 - single CPU. (and with dual core likely becoming the standard, we might as well divide that by two) With default gzip it's 3.3 seconds though, and that still compresses it down to 57 MB. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/