[huskerlug] Re: Advice -- RedHat version support(No free lunch!)

>       What I read RedHat still doesn't want to use it and prefers EXT3
> because of it's backward compatibilty with EXT2.  ---Jim

Another reason is that the file system repair utilities for Reiser aren't as 
mature as for ext2/3.  Even with a journal, file systems will sometimes 
require fixing.  Also, for those who need it, ext3 can journal the actual 
data was well as the meta data.  Reiser, and most other journaled file 
systems, only write the meta data to the journal.  

As for performance, there have been enough benchmarks out that support either 
one as a better performer, that the only way to know for sure which is better 
it to test each one for your particular application and choose the one that 
works best.  The one place where I think where Reiser will definitely win is 
where you have a lot of small files in a directory (e.g. squid caches).  
IIRC, Reiser directory access uses a hash table to look for a file in a 
directory, where as ext2/3 just searches for it sequentially (although I 
think support for hash table lookups in ext3 has been added to 2.6).  
Reiser4 is a different story all together and I can't wait to try it (the 
reliability of a journaled file system without the performance impact).

I'd still recommend a decent UPS for production systems even if they use 
journaled file systems.  The UPS is not only good for power loss situations, 
but it helps to "clean" the power up for your system.  Brown out situations 
can have interesting effects on a box.

-- 
Steve Bremer
RHCE,CCNA
--
Real Men don't make backups. They upload it via ftp and let the world 
mirror it. -- Linus Torvalds
--
GnuPG Key fingerprint = 7F06 4D73 7963 BE96 5189  953A E285 CB2C BA03 2746
Available on key servers.

  


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