Re: [fetchmail-devel] Re: Incorrect header line and lost mails

[Matthias A. <mat...@gm...>]

Sunil Shetye <sh...@bo...> writes:

> Quoting from Matthias Andree's mail on Tue, Mar 07, 2006:
>> what should we do WRT fastuidl?  We seem to need sanity checks to disable
>> the fastuidl search for servers such as Fr?d?ric's.
>
> One option is to change the default to a lower value from the current
> value of 10. The lowest practical value is 2, which will use linear
> search in alternate polls.

The algorithm tries to find the first unused UIDL with a binary search,
on the assumption that all new messages were at the end of the
list. This doesn't work for Frédéric's server and others.

> Other solutions are also possible. For example, keeping a map of UID
> and message number in memory (with corrections for mails deleted after
> logout).

Aren't we keeping those in memory anyways? If so, such a check wouldn't
hurt and serve those users whose servers create messages out of order.

In the long run, we'd probably better keep them in a database on disk to
keep the memory footprint down.

> Note that Frederic has claimed that messages with low UID never get
> downloaded. This is only partially correct. In his case, messages with
> low UID never get downloaded whenever a binary search is performed.
> However, a linear search is performed once in every ten polls
> (starting with the first poll) and these messages which were missed
> out earlier will get downloaded in this poll with linear search.

Well. Should I lower the default to 4 for the nonce or wait for a patch? :)

-- 
Matthias Andree