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Subject: RE: [sdd] [glossary] topology definition
So why don't we use topology appropriately qualified, rather than trying to find some other term to fit the definition? Specifically, then I'm speaking about solution topology, rather than network or environment topology. Regards, Debra -----Original Message----- From: James Falkner [mailto:james.falkner@sun.com] Sent: Thursday, March 23, 2006 2:01 PM To: Danielson, Debra J Cc: jay@o-ms.com; sdd@lists.oasis-open.org Subject: Re: [sdd] [glossary] topology definition IMO There are three ways to use "topology". Here are three examples illustrating how I think we mean to use topology: ---- 1. LOGICAL SOLUTION TOPOLOGY My solution consists of a J2EE web app backed by a database. 2. PHYSICAL SOLUTION TOPOLOGY I just finished deploying a solution. Its topology is J2EE container on host1, hosting a POS [point-of-sale :)] app, and an RDBMS on host2 containing order information. 3. TARGET ENVIRONMENT TOPOLOGY My datacenter's topology consists of 5 subnets with 25 hosts on each, each subnet has 5 Dell PCs, 10 HP opterons, and 15 Sun ultra 20's. ---- The difference is that the LOGICAL SOLUTION TOPOLOGY refers to an un-deployed solution's requirements. The PHYSICAL SOLUTION TOPLOGY is the resulting topology of hosts that were used in deployment of the solution. In my opinion, #3 above is the traditional definition of the word, and I do not believe that it makes sense for SDD to use it. I think continuing to use the word "topology" will confuse folks familiar with the traditional meaning, and therefore I think we need to pick a new word to mean a combination of #1 and #2 (or simply prefix our chosen word with logical/physical to indicate the type). Here are some examples of my thinking: Target Environment Target Horizon Host Set Target Set Target Domain I actually like the last one, but then we end up overloading the word "domain" (which has meaning in the networking world also, like topology). Thoughts? -jhf- Danielson, Debra J wrote: > wouldn't 2 instances installed on one physical node be considered 2 > logical nodes? > > I disagree with this conclusion. > > > Regards, > Debra > > -----Original Message----- > From: Jay Nash [mailto:jay@o-ms.com] > Sent: Thursday, March 16, 2006 10:08 AM > To: sdd@lists.oasis-open.org > Subject: [sdd] [glossary] topology definition > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Folks, > Upon further review, the common use of the term 'topology' in the > realm of computer science is > > "The physical or logical layout of the nodes in a network". > > If we mean to include the possibility of multiple instances on a > single machine (or node), then we should consider using a word other > than 'topology'. Target environments, or target hosts seem reasonable. > > Regards, > Jay Nash > - -- > - -- > Jay Nash, CTO > OMS SafeHarbor > 128 Warren St > Lowell MA 01852 > 978.937.2363 ext.111 > 978.937.3784 fax > > This message (including any attachments) contains confidential > information intended for a specific individual and purpose, and is > protected by law. If you are not the intended recipient, you should > delete this message and are hereby notified that any disclosure, > copying, or distribution of this message, or the taking of any action > based on it, is strictly prohibited. > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.1 (Darwin) > > iD8DBQFEGX8zHsIa/RmVc78RAo5EAKCGSvnMA8a5SDmWij/uYWKhYYMmOgCgjADd > fQw/Fe7/fj0qsqjNHNNJIXA= > =KuS/ > -----END PGP SIGNATURE----- > >
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