Re: reiser4 mkfs, cryptcompress, tail packing, etc.

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Edward Shishkin wrote:
Gordan Bobic wrote:
Hi,

Hello.


It's been a while since I last tried reiser4, and having just looked at the wiki, I couldn't find any info at all on the cryptocompress plugin and tail packing options at mkfs time specifically relating to reiser4.

mkfs.reiser4 -l:

compression modes (works "per file"):

"latt" (id:0x1 type:0xd) ['Check on dynamic lattice' compression mode plugin.] If logical cluster in incompressible, then switch compression off and check every K-th cluster, where K dynamically increased to 32 on every non-success after
compression. If cluster is compressible, than K is set back to 1, etc..

"ultim" (id:0x2 type:0xd) ['Check ultimately' compression mode plugin.]
Switch compression off forever after the first case of non-success.

"force" (id:0x3 type:0xd) ['Compress evrything' compression mode plugin.]
Force to compress everything.

"conv" (id:0x4 type:0xd) ['Convert to extent' compression mode plugin.] If the first logical cluster of the file is incompressible, then switch compression off forever.

Sorry, this is not everything. Here should also go "otherwise switch to "latt" mode
(see above)".
So not everything is bad for media-files in this mode.
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