Messages in this thread |  | | Date | Thu, 01 Nov 2001 20:17:24 +0000 | From | Roy Sigurd Karlsbakk <> | Subject | Re: writing a plugin for reiserfs compression |
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Andreas Dilger (adilger@turbolabs.com) wrote*: > >On Nov 01, 2001 18:14 +0100, Roy Sigurd Karlsbakk wrote: >> Novell NetWare has a feature I really like. It's a file compression >> feature they've been having since version 4.0 (or 4.10) of the OS. > >Yes, there is a patch for ext2 that does this as well.
ok...
I just thought there was a patch doing windows nt-like compress-em-all-realtime-and-get-doomed!
>> New attributes must be added somehow. 'ls' and 'find' and perhaps other >> files must be modified to take advantage of this. The compression job can >> be a simple script with something like >> >> find . -type f ! --compressed ! --dont-compress / -exec fcomp {} \; >> >> (and check can't compress and force compression).
There already exists a patch for reiserfs which uses the same interface to file attributes that ext2 and ext3 use.
ok? with batched compression?
>Also, ext2 already has a "compressed", "do not compress", and "dirty" >attributes. They are currently not all user modifyable for ext2 >filesystems via chattr/lsattr, but that doesn't mean they cannot be >on reiserfs. > >> There must be a way to access the compressed files directly to make >> backups more efficient - backing up already compressed files's a good >> thing. > >Yes, there is also such an attribute for "raw" access I think. > >Making the user-space interface and tools as compatible as possible is >a good thing, IMHO, just like "ls", "cp", etc all work regardless of >the underlying filesystem.
yes, but it's kinda nice to have some way of checking a file's attributes for a sysadmin...
>As a note to whoever at namesys created the reiserfs patch to add the >"notail" flag (overloading the "nodump" flag). I would much rather >that a new "notail" flag be allocated for this. I will contact Ted >Ted Ts'o to get a flag assigned. This will avoid any problems in the >future, and may also be useful at some time for ext2.
Do you think the other flags I mentioned may be useful?
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