Email delivery (sendmail->procmail->$HOME/mbox) with fallback
John Summerfield
debian at herakles.homelinux.org
Mon Jan 7 23:45:13 UTC 2008
Tim Alberts wrote:
> John Summerfield wrote:
>>
>> Are you serious? You are running mission-critical applications on the
>> second least reliable software offering from the RHL family?
> I'm guessing you don't work in advertising for Red Hat, Fedora, or Linux
> in general?
I don't.
>
>
>>
>> Use good hardware, good software (RHEL or a clone), IMAP and not POP3,
>> and use one of the reliable RAID (1, 4 or 5) choices for your mail
>> (and other critical data) storage.
> Been using POP3 forever with no problems (except some Mac problems with
You do have a problem, your mail is scattered all over the place. imap
keeps it on the server.
> Dovecot). Have RAID1 software setup for years as well. Keep getting
> drive failures and looking back into hardware RAID with high quality
> equipment (as mentioned before).
>
>>
>> Even if a dodgy Fedora software update doesn't get you, you still have
>> to contend with frequent upgrades of the software.
> Yes, I've dealt with 'dodgy' updates and config files being lost by auto
> updates, and bug fixes that mess things up that worked fine. For the
> price, it has been acceptable (at least to the people in charge of the
> purse strings).
Price a problem? CentOS is free of charge. It also costs less.
>
>>
>> Note that RAID _can_ include a network block device (nbd or enhanced
>> nbd drivers), and drbd also provided RAID1 over a network, and is
>> tolerant of breaks in connectivity.
>>
>> note that LVM can provide hot backups.
>
>
>>
>> One trick I've hard of is to define a firewire drive (presumably USB
>> or other hotplug drive) would do as part of a mirror pair. Backup goes
>> something like this:
>> Plug it in
>> Resync.
>> Detach (I don't recall the fine details here)
>> Unplug.
> Used removable drive trays for rsync backups without the RAID. Now we
> got backup systems that are rsync backed up and ready to run in
> failures. However, any email that was delivered between the last rsync
> and the failure gets lost temporarily or permanently. Hence my idea for
> NFS mount to quality RAID1
NFS has its own problems. enbd and drdb are better than rsync.
>
>>
>> Google for terms such as "reliable linux" "high availability linux"
>> "linux cluster" etc for more details.
> Google'd and Yahoo'd...seen hundreds of ideas mostly based on
> heartbeat. In fact I most recently was looking into Red Hat's Global
> File System and clustering:
>
> http://www.redhat.com/gfs/
> http://www.redhat.com/cluster_suite/
>
> Trying to figure out how Red Hat is accomplishing these things with open
> source, or if they are adding their own proprietary background stuff.
Look at CentOS. If it's in that (I believe it is) then it's OSS.
>
>
>
> All-in-all, fun discussion, but completely off topic from my original
> post and still doesn't answer my question.
I'm more concerned with the underlying problem than with your proposed
solution.
Do you want the best solution?
--
Cheers
John
-- spambait
1aaaaaaa at coco.merseine.nu Z1aaaaaaa at coco.merseine.nu
-- Advice
http://webfoot.com/advice/email.top.php
http://www.catb.org/~esr/faqs/smart-questions.html
http://support.microsoft.com/kb/555375
You cannot reply off-list:-)
More information about the fedora-list
mailing list