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New -zisofs parameter bpt_free_ratio=

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Thomas Schmitt
2020-10-22 13:42:51 +02:00
parent 5a6aa8a71e
commit c4d66ecb19
10 changed files with 152 additions and 78 deletions
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16
xorriso/xorriso.texi
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@ -50,7 +50,7 @@
@c man .\" First parameter, NAME, should be all caps
@c man .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
@c man .\" other parameters are allowed: see man(7), man(1)
@c man .TH XORRISO 1 "Version 1.5.3, Oct 16, 2020"
@c man .TH XORRISO 1 "Version 1.5.3, Oct 21, 2020"
@c man .\" Please adjust this date whenever revising the manpage.
@c man .\"
@c man .\" Some roff macros, for reference:
@ -3667,9 +3667,19 @@ may further reduce the effective payload.
"max_bpt_f="1k|...|128g sets the limit for the memory size of the block
pointer list of a single file. max_bpt_f is never larger than max_bpt.
If either is set to violate this rule, the other gets set to the same value.
If both values are the same before a change by max_bpt= or max_bpt_f=, then
both limits stick together unless the limit is decreased by max_bpt_f=.
@*
"default" same as "level=6:block_size=32k:by_magic=off:
version_2=off:block_size_v2=128k:max_bpt=256m:max_bpt_f=256m".
"bpt_free_ratio="-1|[0.0...1.0] sets a threshold for switching to block
pointer discarding during compression. If less than the given fraction of the
max_bpt_f= memory is free, then block pointers of compression filters get
discarded after size assessment. This causes a third read run of the input
file during the production of the ISO filesystem. Value -1 disables this
feature.
@*
"default" is the same as "level=6:block_size=32k:by_magic=off:
version_2=off:block_size_v2=128k:max_bpt=256m:max_bpt_f=256m:
bpt_free_ratio=0.5".
@c man .TP
@item -speed code|number[k|m|c|d|b]
@kindex -speed set write speed