Commit ecc1defd authored by Michael Graff's avatar Michael Graff
Browse files

add documentation for additional-from-{auth,cache} -- comments welcome

parent 5c90fb23
......@@ -2,7 +2,7 @@
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.0//EN"
<!-- File: $Id: Bv9ARM-book.xml,v 1.50 2000/11/27 18:06:02 gson Exp $ -->
<!-- File: $Id: Bv9ARM-book.xml,v 1.51 2000/11/28 18:35:08 explorer Exp $ -->
......@@ -2506,6 +2506,8 @@ lookups performed on behalf of clients by a caching name server.</para></entry>
<optional> min-retry-time <replaceable>number</replaceable> ; </optional>
<optional> max-retry-time <replaceable>number</replaceable> ; </optional>
<optional> port <replaceable>ip_port</replaceable>; </optional>
<optional> additional-from-auth <replaceable>yes_or_no</replaceable> ; </optional>
<optional> additional-from-cache <replaceable>yes_or_no</replaceable> ; </optional>
......@@ -2797,6 +2799,35 @@ refresh and retry times to the specified values.
<row rowsep = "0">
<entry colname = "1">
<entry colname = "2"><para>
These options control the server's behavior when answering queries
which have additional data, or when following CNAME and DNAME
chains to provide additional data.
With both of these options set to "yes" (the default) and a
query is being answered from authoratitive data (a zone
configured ito the server) the additional data section of the
reply will be filled in using data from other authoratitive zones
and from the cache. In some situations this is undesired, such
as when secondaries may be added and modified by others, and when
there is concern over the correctness of the cache. Also, avoiding
the search for this additional data will speed up server operations
at the possible expense of additional queries to resolve what would
otherwise be provided in the additional section.
For example, if a query asks for an MX record for host,
and the record found is "MX 10", normally the address
records (A, A6, and AAAA) will be provided as well, if known. These
options disable this behavior.
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