ZLIB/ZSTD Compressed MBOX in Maildir++ layout

[Josef 'Jeff' Sipek]

On Mon, Jun 28, 2021 at 10:00:59 +0100, Pedro Ribeiro wrote:
> Hello!
> 
> Thank you for the suggestion.
> 
> That solved the problem of using layout FS with MBOX storage format.
> 
> After copying all the mail of the test user to the namespace in this 
> format I've compressed all the storage files with ZSTD and that changed 
> the name with the additional suffix .zst
> 
> Dovecot seems to need this to be .zstd so I've fixed the names.
> 
> But ... it doesn't work.
> 
> > Jun 28 08:56:39 ribble dovecot: 
> > imap(pribeiro at net.ipl.pt)<82609><vi0h1M7FGMMKZP4/>: Error: Mailbox 
> > @HISTZLIB/IPLNet: 
> > stat(/mnt/mail-hist/historic-fs/net.ipl.pt/ro/pribeiro/mailboxes/IPLNet/mBoX-MeSsAgEs) 
> > failed: No such file or directory
> In that directory the filename is:
> 
> > -rw------- 1 vmail vmail 853M Jun 25 17:25 mBoX-MeSsAgEs.zstd
> What am I doing wrong?

Hm.  It is possible that it just doesn't work.  mbox doesn't get a lot of
attention these days - its support is more of a migration tool.

Out of curiosity, why do you use mbox?  In your earlier email you said that
you want a self contained format.  Why?  What's the goal?

Jeff.

> 
> regards!
> 
> On 24/06/2021 14:53, Josef 'Jeff' Sipek wrote:
> > On Thu, Jun 24, 2021 at 10:35:24 +0100, Pedro Ribeiro wrote:
> >> Hello everyone!
> >>
> >> Our archive namespace is kept in MBOX format with Maildir++ layout due to:
> >>
> >>    * Need to have the email from all users/folders self contained (our
> >>      base namespace uses MDBOX with single instance storage of attachments)
> >>    * MBOX/FS layout isn't supported because some folders have messages
> >>      and subfolders.
> > You should be able to use the fs layout if you specify a dirname:
> > https://doc.dovecot.org/configuration_manual/mail_location/mbox/mboxchildfolders/#messages-in-named-file
> >
> > Then, the compression suffix being added shouldn't matter.
> >
> > Jeff.
> 
> -- 
> Best regards,
> 
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Pedro Ribeiro
> Politécnico de Lisboa, Serviços da Presidência
> Departamento de Sistemas de Informação e Comunicações
> Phone:   +351 210 464 700 (general) / VoIP: 80100
> Helpdesk:helpdesk at net.ipl.pt  /https://www.net.ipl.pt
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> 
> 


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