RE: RAC Vs Standby Database between Primary and Secondary Data Centers

From: Mercadante, Thomas F (LABOR) <>
Date: Wed, 23 Jan 2008 08:52:58 -0500
Message-ID: <ABB9D76E187C5146AB5683F5A07336FF0197B3F5@EXCNYSM0A1AJ.nysemail.nyenet>


My understanding of "Dark Fiber" is this. When fiber optic cable is installed, sometimes all of the individual fiber strands are not used. These are then "dark". So Dark Fiber is simply using spare strands in the larger cable.

If you don't have any fiber installed between buildings, then it probably is very expensive to run. But if the cable has been run, you could check and see if all of the strands are in use.

That's the way I understand it, but I could be (and am frequently) wrong.


-----Original Message-----

[] On Behalf Of Goulet, Dick Sent: Wednesday, January 23, 2008 8:42 AM To:
Subject: RE: RAC Vs Standby Database between Primary and Secondary Data Centers

A question to the group. A couple of you have mentioned "Dark Fiber" as the medium that you use to interconnect these stretch clusters. Now I've heard of the stuff, but back then it was one of those technologies that one used only when money was NOT a consideration. The project at that time would have required linking two buildings 8 miles apart with Dark Fiber that alone had a cost on $1M per month. Has that come down recently to where it is something that's affordable?

Dick Goulet / Capgemini
North America P&C / East Business Unit
Senior Oracle DBA / Hosting
Office: 508.573.1978 / Mobile: 508.742.5795 / Fax: 508.229.2019 / Email: 45 Bartlett St. / Marlborough, MA 01752

Together: the Collaborative Business Experience

This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message.


-- Received on Wed Jan 23 2008 - 07:52:58 CST

Original text of this message