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[leafnode-list] Re: Spool permissions in leafnode-2
Am 14.04.2009, 14:23 Uhr, schrieb Adam Funk <a24061@xxxxxxxxxxxxx>:
> On 2009-04-08, Matthias Andree wrote:
>> Leafnode-1 and -2 currently use roughly the same spool format:
>> Assuming an instact spool, each article has at least two links, one in
>> message.id/NNN/ (*) directory, and one in the news/group/ directories
>> more if an article is cross-posted to multiple groups you're subscribed
>> texpire works in two phases. Phase 1 will look at when the threads in a
>> particular newsgroup were last read and unlink those links from the
>> news/group/ directories that are past expiry date for the group. After
>> that, in phase 2, it will traverse the message.id/ directories and
>> all files that have just one link.
>> Since the link count is unreliable with a world-readable newsspool:
>> leafnode-2 does not make these directories or articles world-readable
>> continues to use the link count.
>> Leafnode-1 was designed to offer a traditional (i. e. world-readable)
>> spool and cannot use the link count. Instead, it records the Message-IDs
>> of articles it kept during the 1st phase, creating up to 1,000 files
>> message.id/NNN/mids - this is the "tracks the seen Message-IDs" part
>> you quoted - and these "mids" files get reused in phase 2. The IDs
>> in these "mids" files are protected from expiry, the other files are
>> removed. This security fix is in place since 1.9.52 which was released 5
>> years and 5 days ago.
> I guess using the "mids" files is a lot slower than relying on the
> link count. Thanks for the explanation.
It's indeed quite some more effort. It may not matter practically for
smaller sites, but if you run leafnode on older hardware, it easily
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