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-rw-r--r--README13
1 files changed, 10 insertions, 3 deletions
diff --git a/README b/README
index 894b77a..8a31263 100644
--- a/README
+++ b/README
@@ -40,6 +40,13 @@ each file without exceeding the given limit. Keep in mind that the
decompression memory requirement is affected at compression time by the
choice of dictionary size limit.
+The amount of memory required for compression is about 1 or 2 times the
+dictionary size limit (1 if input file size is less than dictionary size
+limit, else 2) plus 9 times the dictionary size really used. The option
+'-0' is special and only requires about 1.5 MiB at most. The amount of
+memory required for decompression is about 46 kB larger than the
+dictionary size really used.
+
When compressing, lzip replaces every file given in the command line
with a compressed version of itself, with the name "original_name.lz".
When decompressing, lzip attempts to guess the name for the decompressed
@@ -69,8 +76,8 @@ corresponding uncompressed files. Integrity testing of concatenated
compressed files is also supported.
Lzip can produce multi-member files and safely recover, with
-lziprecover, the undamaged members in case of file damage. Lzip can also
-split the compressed output in volumes of a given size, even when
+lziprecover, the undamaged members in case of file damage. Lzip can
+also split the compressed output in volumes of a given size, even when
reading from standard input. This allows the direct creation of
multivolume compressed tar archives.
@@ -88,7 +95,7 @@ used by lzip could be developed, and the resulting sequence could also
be coded using the LZMA coding scheme.
Lzip currently implements two variants of the LZMA algorithm; fast
-(used by option -0) and normal (used by all other compression levels).
+(used by option '-0') and normal (used by all other compression levels).
The high compression of LZMA comes from combining two basic, well-proven
compression ideas: sliding dictionaries (LZ77/78) and markov models (the