> > Yes, I made note of that in my OP on this thread. But is it enough to > > end up with 8gb of non-compressed files measuring 8gb on > > reiserfs(linux) and the same data showing nearly 9gb when copied to a > > zfs filesystem with compression on. > > whoops.. a hefty exaggeration it only shows about 16mb difference. > But still since zfs side is compressed, that seems like quite a lot..
That's because ZFS reports *all* space consumed by a file, including all metadata (dnodes, indirect blocks, etc). For an 8G file stored in 128K blocks, there are 8G / 128K = 64K block pointers, each of which is 128 bytes, and is two-way replicated (via ditto blocks), for a total of 64K * 128 * 2 = 16M. So this is exactly as expected. Jeff _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
