IMS handling (Squid PL15)

From: Thomas Schmidt <>
Date: Mon, 10 Jun 1996 11:30:06 +0200


shouldn't IMS be handled as follows ?

1 From requestor to page source through the cache hierarchy each cache
has to check, if it owns a modified version:
1.1 No, our page isn't more recent or we've no such page. Forward query
to next cache.
1.2 Yes, we've a modified page. Ask next cache in hierarchy, if it has a
more recent page than ours.

2. At last the request arrives the pages owner. It should also look for
modification. If its page is
2.2 not modified against the requests date it should return NOT-MODIFIED.
2.1 modified it should return this page.

3. From page source to requestor. If a cache
3.1 gets a full page it should forward it.
3.2 gets a NOT-MODIFIED it should
3.2.1 return this answer if check 1.1 applied
3.2.2 return its page if check 1.2 applied.

At last the requestor gets the most recent version of this page from the
closest possible site.

OK ?


|Thomas Schmidt    | Email: | Phone: +49-30-7829537|
|Leuthener Str. 4a |[Email:]    | Fax: +49-30-7828103  |
|D-10829 Berlin    |                                | Data: +49-30-7828103 |
Received on Mon Jun 10 1996 - 02:31:17 MDT

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