From mboxrd@z Thu Jan  1 00:00:00 1970
From: presotto@closedmind.org
To: 9fans@cse.psu.edu
Subject: Re: [9fans] ftpd
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Date: Wed, 16 Jan 2002 22:24:51 -0500
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correcto mundo

I left pointers in order because idiot systems that reverse lookup
to allow operations often only look at the first returned record
so I kept the most likely first.

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To: 9fans@cse.psu.edu
Subject: Re: [9fans] ftpd
From: geoff@collyer.net
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Date: Wed, 16 Jan 2002 15:22:55 -0800

Actually, Plan 9 dns returns resource records of types A, MX and NS
only in random order.  This is the relevant fragment from ndb/dn.c:

	/* just randomize addresses and mx's */
	for(x = rp; x; x = x->next)
		if(x->type != Ta && x->type != Tmx && x->type != Tns)
			return rp;

In particular, PTR records are returned in the order in which the dom=
clauses that they are generated from were read, if I remember it
right.  This doesn't help much if you have DNS secondaries running
BIND, since they will randomise all RRs, but can sometimes be of help
locally.

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