Maciej Soltysiak wrote:
Hi,
I haven't looked at r4 development for a while now and I have a few
questions.
[...]
I am confused, does reg40 means no compression, or does the compress
lzo1 being there means compression?
Is it possible to create a regular r4 partition and choose which files
keep compressed (how?)
Not yet.
There is a (deprecated) pseudo-file interface, which allows to set
compression et al per directory (the latest patch is against 2.6.13).
or do I have to create a all-compressed partition?
Yes.
Reiser4 has means to automatically reduce cpu and memory usage on
incompressible data.
With the default plugin scheduler (compressMode: "conv") conversion
will be performed in 2 interfaces:
1. FILE: convert cryptcompress to unix-file plugin;
2. COMPRESS: turn on/off compression in flush time.
However, this scheduler uses very simple heuristics which work
incorrectly on various media files, etc.. I believe it can be improved
to process 80-90% of _all_ files properly.
To play with compression can I just use the standard patch from
http://www.kernel.org/pub/linux/kernel/people/edward/reiser4/reiser4-for-2.6/
?
Yes.
Does this patch include also file-as-directory stuff?
No, this stuff was removed (see my comment about pseudo-file interface
above)
BTW it might be good to change the *Reiser4 is released!* message on
http://reiser4.erudified.com/install_v4.html
to at least point to
http://www.kernel.org/pub/linux/kernel/people/edward/reiser4/reiser4-for-2.6/
instead of giving a 404.
This is a temporal place for Hans's whitepaper.
I don't have a time to fix all the links to work properly.
Thanks,
Edward.
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