Am 14.02.2016 um 07:15 schrieb Cedric Malitte: > Thanks Robert, > > Having 2 separate servers would mean domain splitting in a way. > So I'll have to dispatch incoming mail, and maintain 2 or more users > databases. > Well I could only maintain one, and let the DB replicate itself to other > servers and only grab the users they are allowed to. > > We have many domain aliases for many countries and a dozen users traveling > around the globe. > So geo balacing would not be the best for them.
hm... you could do some dns setup which gives differ results for your mail servers depending to the clients source ip > > But the redundancy is missing.... if one server goes down, I loose a bunch > of users and that's not what I am looking for. yes storage and balancing is the problem, there are differ ways to solve it > > I looked for providers offering that, but I guess my bosses would not let > me spend over 3000$ per month on that. > Else I would already have the mails hosted by microsoft and have a cocktail > on the beach :) a selfdone setup will not be cheap too > > I'm not any kind of guru, I do not have any disciples. > I did kernel mod development on embedded systems with freebsd 4 and 5, I > still develop some linux kernel drivers for proprietary systems from time > to time. > My main degree is electronic engineering and I also graduated in computing > related to management in other words I learned a bit of everything to be > able to manage teams developers and understand what they do. what i mean is experts in mail setups not your degree > > Looks like it's doable, so I'll continue to dig and experiment. of course it can be done ,but i think you will have a hard time unless you get help from people with experience in that > > Best regards > > Cedric > > > 2016-02-13 16:05 GMT-05:00 Robert Schetterer <r...@sys4.de>: > >> Am 13.02.2016 um 04:00 schrieb Cedric Malitte: >>> Hi, >>> >>> I use dovecot for a long time now, but only as a single isolated server >>> each time. >>> >>> I joined a company a few years back. We had trouble with compagnies >> hosting >>> our mail, supposedly full redundant and so on. >>> >>> The company is small, but we have many dealers around the world, and it's >>> growing. >>> >>> Mail became the fist choice for clients to contact the dealers. >>> No mail, and we loose sales. >>> >>> For now we have a single server ( with a backup ) on east coast. >>> And sometimes peoples from EU complain about speed.... ah users :) >>> >>> What I'd like to implement is a redundant system with 2 servers, one in >> NA, >>> one in EU. >>> And I'd also like to be able to add another server if needed on the west >>> coast. >>> >>> Idea is, that if a server goes down, the users will be able to still >>> receive and send mails, and never loose mails. >>> >>> For geobalacing and failover, I read that I can do it with DNS ( I'm with >>> easydns ). >>> >>> I'm at the first stage where I collect informations that I try to >>> understand and foresee a solution. >>> >>> First idea is to set up servers with a mysql master, slaves and a >> glusterfs >>> in replica mode on the servers. >>> I tried glusterfs on FreeBSD and OMG, it's slow as hell ! ( well maybe >> it's >>> a trouble on the VMs nics ) >>> On centos it's way better. >>> But I read there might be trouble/index corruption for the mail storage >> on >>> "shared" space using maildir. >>> >>> I also had a look at dsync, but I wonder if it can be used on more than 2 >>> servers. >>> >>> I found many pages on dovecot clusters using shared storage NFS mounted, >>> but I feel it's not really what I need as the servers will be in >> different >>> datacenters. >>> >>> So any guide, clue hint would be really appreciated for me to do my >>> homework ! >>> >>> Regards. >>> >>> Cedric >>> >> >> complicated and expensive for a small company >> why not have one imap server in US and the other in EU >> so US Users should have their Mailboxes on the US Server >> EU users should have their Mailboxes on the EU Server >> >> Smtp you might manage via smtp routing, perhaps with subdomains us eu >> and aliasing >> >> Or you might take some paid service which has geo stuff allready up and >> and running, dont try or think of doing it yourself, unlees youre a guru >> >> Best Regards >> MfG Robert Schetterer >> >> -- >> [*] sys4 AG >> >> http://sys4.de, +49 (89) 30 90 46 64 >> Franziskanerstraße 15, 81669 München >> >> Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 >> Vorstand: Patrick Ben Koetter, Marc Schiffbauer >> Aufsichtsratsvorsitzender: Florian Kirstein >> Best Regards MfG Robert Schetterer -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein
