Re: [Courier-imap] architecture for distributed IMAP service using cloud services from different provider (object storage fs or glusterfs)

[Sam V. <mr...@co...>]

nik600 writes:

> I think that there are 2 way:
>
>
> - usage of S3 or other object-storage service as a back-end of courier
> --> anyone has considered this possibility ?
> --> is there any plugin of extension of courier in this direction ?

Nope. Courier-IMAP expects to read mail from the filesystem. Something that  
looks and acts like a filesystem has to be there.

> - usage of a distributed file system (glusterFS or similar) with support of  
> many active-active nodes
> --> this is already working (i've tested) but too poor performance
> --> what about a proxy that split requests between read and write, read  
> requests goes to a geo-replicated node with higer performances and write  
> requests goes to an active-active note with lower performances

99% of what an IMAP server does is reading mail. The only time an IMAP  
server writes anything of substance, to the mailbox, is when you save a  
draft message, from your mail client, in the drafts folder.