[ka-Map-users] Best Linux file system type for ka-map cache?

Daniel Morissette dmorissette at mapgears.com
Wed Oct 24 14:43:46 EDT 2007

Stephen Woodbridge wrote:
> Daniel Morissette wrote:
>> Does anyone have recommendations on the best Linux file system type to 
>> use for a ka-Map cache? i.e. the most efficient file system for use 
>> with large number of small files.
>> Daniel
> Daniel,
> Our research has shown Reiserfs to be the fastest. All Linux FS suffer 
> from the block allocation issues. That is the fact the files are 
> allocated based based on a 4k block, but most water tiles are only 130 
> bytes but use up 4k of disk. We have found some SAN devices that do 
> their own internal space allocation that does not suffer from this 
> effect, but I believe that is specific to the internal SAN implementations.
> -Steve

Thanks to both of you (Steve and Attila) for a very instructive 
discussion. Sounds like reiserfs is the short answer to my initial question.

Your answer lead me to do a bit more research on reiserfs and I found 
out that there is a Reiser 4 (http://en.wikipedia.org/wiki/Reiser4) 
that's been in the making for several years and is not part of regular 
distributions yet but that would address the small file issue and 
apparently be even faster than resierfs 3 for large directories of 
files. I quickly browsed some discussion threads on why it's not 
included in Linux yet and that whole thing sounds like an ugly situation.

Daniel Morissette

More information about the ka-Map-users mailing list