Failover on a large DHCP system

[David W. Hankins]

On Fri, May 08, 2009 at 10:09:29AM -0600, Nicholas F Miller wrote:
> With constant restarts of DHCP and the need for 
> failover to redistribute the pools on restarts I think the server load and 
> disk access would be too high.

The disk access footprint between failover restarts is only the
"changes" to the database.  It doesn't remirror the lease db every
reconnect - they only update each other with any new bindings that
ocurred during the blackout.

With huge numbers of leases, it can be a problem however, as it causes
both servers to traverse the entire lease database (in memory) right
now.

-- 
David W. Hankins	"If you don't do it right the first time,
Software Engineer		     you'll just have to do it again."
Internet Systems Consortium, Inc.		-- Jack T. Hankins
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 194 bytes
Desc: not available
URL: <https://lists.isc.org/pipermail/dhcp-users/attachments/20090508/a3835d46/attachment.bin>