Thanks. I'll check the part about flags being changed.
On Wed, Jun 25, 2014 at 5:03 AM, Sam Varshavchik <mr...@courier-mta.com>
wrote:
> Amol Kulkarni writes:
>
> Assuming that there will be about 50 mail being uploaded simultaneously
>> and 600 users accesing the same account at the same time - are there any
>> locking issues in courier imap which will come into picture ?
>>
>>
>> Will there be a problem if say 100 users out of 600 are accessing same
>> mail ?
>>
>
> Merely accessing mail is read-only, and this carries no locking issues.
>
> Locking issues will come up when there's more than just reading or
> searching mail. Changing a message's flags (unread, read, deleted, etc…),
> or adding messages into a mailbox carries a tiny possibility that, say for
> example, a particular message's file gets renamed while another process is
> in the middle of opening it, for the purpose of reading its contents, or
> searching it. This will result in an error getting reported to the client.
>
> If an occasional error is acceptable, then it is what it is. IMAP does not
> technically guarantee concurrent access to a mailbox; IMAP servers are not
> obligated to implement 100%-reliable concurrent access to a mailbox, and
> IMAP clients should be prepared to handle an occasional error.
>
> Additionally, in your use case, it really looks like you're using IMAP for
> use cases it's not intended to be used for. What you need is a real search
> engine, or a database, not an IMAP server. That's what your application
> should use, rather than an IMAP server. You need to use the right tool for
> the right job, and it doesn't look like IMAP is the right tool, here.
>
>
>
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