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Re: Name resolution limits
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Re: Name resolution limits


  • Subject: Re: Name resolution limits
  • From: David Rehring <email@hidden>
  • Date: Thu, 07 Feb 2002 17:23:32 -0800

On 2/7/02 5:08 PM, jud spencer at email@hidden wrote:

> There was some discussion here a while back about the limits to the number
> of name lookups that can take place at one time using OT.
>
> Can I hear what the exact limits are? Is it one lookup at a time? What are
> the limits running under OS9 using Carbon? Is it the same as an OS9
> InterfaceLib version?
>
> The OSX version of LetterRip is getting some horrible performance in the MX
> lookup area. We currently don't cache MX lookup info, should I consider
> doing that now or is the current limitation short-term?

It's my understanding that under OS X, the BSD DNS lookup code only supports
doing one at a time and since OT is layered on top of BSD, it suffers the
same problem. Classic applications are NOT fettered by this problem

I believe some people work around it by basically using a library that
directly does DNS lookups [rather than using BSD to do it].

Finally, I don't believe anyone at Apple is permitted to say if and/or when
this behavior will be modified...

Later,
--
David Rehring Psychos do not explode when light hits
Senior Software Engineer them, no matter how crazy they are...
Atimi Software, Inc.
www.atimi.com And totally insane guy!
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References: 
 >Name resolution limits (From: jud spencer <email@hidden>)

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