Re: [Dovecot] Passwordless auth?

[Dirk Jahnke-Zumbusch]

Hi,

I didn't quite mean that: yes, that is 'passwordless' in a sense, but
you still have to have typed a password into kinit fairly recently.

What I meant was that with 2.2 it's finally possible to set a list of
krb5 principals for imap which is different from the list in .k5login.
This makes it possible to create special-purpose principals, which can
have their keys put in a keytab, which can then log on as an ordinary
imap user.

perhaps I misunderstand you, but something like

kinit -k -t /path/to/keytab

authenticates w/o the need of typing a password.

Cheers
Dirk

Re: [Dovecot] OT/about SSDs (was: XFS vs EXT4 for mail storage)

[dirk . jahnke-zumbusch]

Hi all,

I found a reference about the robustness of SSDs (and rotating rust)
on c0t0d0s0.org 
(http://www.c0t0d0s0.org/archives/7578-Switching-off-SSDs-and-the-consequences.html)
pointing to this interesting paper:

http://www.cse.ohio-state.edu/~zhengm/papers/2013_FAST_PowerFaultSSD.pdf

Just in case you ever wondered what might happen to your SSDs if power fails.

Cheers
Dirk

- Ursprüngliche Mail -
Von: Stan Hoeppner s...@hardwarefreak.com
An: dovecot@dovecot.org
Gesendet: Sonntag, 5. Mai 2013 12:22:05
Betreff: Re: [Dovecot] XFS vs EXT4 for mail storage

On 5/4/2013 10:54 AM, Charles Marcus wrote:
 On 2013-05-04 11:20 AM, Marc Perkel m...@perkel.com wrote:
 For what it's worth if you can afford it I'd use SSD drives. My server
 screams since I went to SSD.
 
 Hi Marc,
 
 You have no idea how much I would love to use SSDs for this. But the
 cost was simply not quite justified.
 
 The price keeps coming down on them though - even now, 10 months after
 buying these servers, the cost would probably be low enough that we may
 have actually done so, but it was going to be about double the cost of
 the 15k drives at the time we priced them.
 
 Next time, definitely... :)

The verdict is still out on use of enterprise SSDs.  They've simply
not been in use long enough en mass to know what the common failure
modes are and what the real lifespan is.  I personally wouldn't yet
trust long term storage to them, though I have no problem using them for
fast temporary storage for things like a busy mail queue.

-- 
Stan

Re: [Dovecot] Better to use a single large storage server or multiple smaller for mdbox?

[Dirk Jahnke-Zumbusch]

Hi there,

 I have to say - I haven't actually seen this happen... Do any of your
 big mailstore contacts observe this, eg rackspace, etc?

Just to throw in to the discussion that with (silent) data corruption
not only the disk is involved but many other parts of your systems.
So perhaps you would like to have a look at

https://indico.desy.de/getFile.py/access?contribId=65sessionId=42resId=0materialId=slidesconfId=257

http://indico.cern.ch/getFile.py/access?contribId=3sessionId=0resId=1materialId=paperconfId=13797

The documents are from 2007 but the principals are still the same.

Kind regards
Dirk