check Availability before sending response

Stephane Bortzmeyer bortzmeyer at
Wed Dec 3 15:08:51 UTC 2008

On Wed, Dec 03, 2008 at 10:53:43PM +0800,
 Ken DBA <mysqld at> wrote 
 a message of 21 lines which said:

> ie, given the domain name was pointed to and
> in Bind.  When a client query for, Bind will
> check the health status for these two servers. If one is
> unavailable,Bind shouldn't direct client's requests to it.

How BIND could:

* Know what protocol to test? is probably for HTTP but ? POP ? IMAP ?

* Embed all these protocols? HTTP, HTTPS, POP, IMAP, BitTorrent, DNS,
whois, FTP, SSH, SMTP...

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