[CentOS] Anyone using sendmail?

Christopher Chan christopher at ias.com.hk
Thu Dec 6 02:17:58 UTC 2007


Craig White wrote:
> On Wed, 2007-12-05 at 15:48 -0800, Kenneth Porter wrote:
>> --On Tuesday, December 04, 2007 8:57 PM -0700 Craig White 
>> <craigwhite at azapple.com> wrote:
>>
>>> Once you've used cyrus, you'd never go back to uw-imap or dovecot
>>>
>>> Each e-mail is stored as a separate file, not a nasty single mbox file
>>> that gets large.
>> Note that the competitors can use maildir, so this isn't a Cyrus-only 
>> feature.
> ----
> actually, cyrus doesn't use maildir but it's not altogether that
> different in concept...but of course, there really is no standard
> definition for maildir but what was implemented by vpopmail seems have
> been adopted by courier and dovecot
> ----

vpopmail does not implement maildir. Maildir is a DJB invention and 
vpopmail just automates certain aspects of creating a mailstore based on 
maildir. courier and dovecot choose to support this open format along 
with other mtas besides qmail, where it was first implemented.

>> But AFAIK this comes at a storage penalty: Many small files will waste 
>> space approximately equal to half the storage allocation unit times the 
>> number of files. Or is there a way to mitigate this on ext3? (I don't want 
>> to go to Reiser.)
> ----
> Reiser seems to have lost most of it's lustre but there are of course
> other types of storage.
> 

Ah, kernel politics and whatever...nice that such things get in the way 
of technology. Look at zfs (okay, not the best whatever but the thing is 
sweet to use) and they broke all the 'rules'. We could have had a great 
filesystem plus compression and a whole lot more were it not for kernel 
politics. Then there was the recent CK thing.



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