Lines Matching +full:cluster +full:- +full:mode

1 .\"-
2 .\" Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org>
48 class will be able to decompress the resulting image at run-time.
56 .Bl -enum
60 image is split into clusters; each cluster is compressed.
69 .Bl -tag -width indent
96 For any given algorithm, a lesser number selects a faster compression mode.
97 A greater number selects a slower compression mode.
105 .Va 0-9 .
114 .Va 1-9 .
123 .Va 1-19 .
129 Enable de-duplication.
135 typically around 3-5% of a final size of the compressed image.
172 Disable zero-block detection and elimination.
178 detects and compresses zero blocks in a space-efficient way.
185 cluster size used.
186 For large cluster sizes (16kB and higher), typical overall image compression
189 are only 1-2% less than those achieved with
192 However, it should be kept in mind that larger cluster sizes lead to higher
195 class, as the class has to decompress the whole cluster even if
196 only a few bytes from that cluster have to be read.
198 Additionally, the threshold at 16-32 kB where a larger cluster size does not
204 .Ar Zstd will continue to provide better compression ratios as cluster sizes
208 become more expensive the greater the cluster size.
210 The de-duplication is a
212 specific feature and while it does not require any changes to on-disk
232 .Ex -std
238 .Bd -literal -offset indent
243 .Bd -literal -offset indent
248 .Bd -literal -offset indent
253 .Bd -literal -offset indent
254 mdconfig -f /src.img.uzip
258 .Bd -literal -offset indent
259 mount -o ro /dev/md0.uzip /mnt