[kdepim-users] Clicking on new mail causes Index problem

[Ingo Klöcker]

On Friday 16 October 2009, r bartlett wrote:
> >Are the folders mbox or maildir?  Maildir is better speedwise, but
> > also if something gets corrupted the rest are not at risk.
>
> So maildir is the best option both for speed

This depends. For most tasks maildir should be faster than mbox. One 
exception is probably copying a whole folder since copying lots of 
small files (as with maildir) is usually slower than copying one big 
file (as with mbox). Also many file systems (in their default 
configuration) have performance problems with folders containing tens 
of thousands of files. So maildir folders with tens of thousands of 
messages might be slow due to suboptimal configuration of the file 
system. If you are using ext3 then dir_index should be used. (See for 
example 
http://serverfault.com/questions/43133/filesystem-large-number-of-files-in-a-single-directory)


> and for corrupt-proof-ness?

Yes.


Another advantage is the possibility of incremental backups. With 
maildir this is easy since only files corresponding to messages that 
were added to the folder after the last backup need to be copied. With 
mbox incremental backups are not really possible because whenever a 
single message is added to an mbox folder the whole big mbox file will 
have to be copied again (unless we are dealing with really 
sophisticated backup software).


Regards,
Ingo
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