[acs-wg] Replication discussion material

[Ziu, Peter]

Sachiko, this is very helpful, as usual, thanks so much for the valuable
input.  I have attached a few new slides that I hope might serve to
provide the necessary data elements required by a replicative data
storage service.  I had hoped to include all of the rules that would
apply to maintaining the element values for bi-directional replication
(when updating, when creating, when deleting), but they are fairly
complex, and I just haven't found adequate time so far.  But, for what
it's worth, (see attached).

Pete.

-----Original Message-----
From: owner-acs-wg at ggf.org [mailto:owner-acs-wg at ggf.org] On Behalf Of
Sachiko Wada
Sent: Wednesday, August 10, 2005 11:07 AM
To: acs-wg at ggf.org
Subject: [acs-wg] Replication discussion material

Pete and all,

Here is the input material for the replication discussion.

The purpose of this document is to examine the feasibility of
constructing a replication service on top of ACS.
There are the two scenarios:
 Scenario 1:  One-way synchronization, triggered by modification of the
master ACS.
 Scenario 2:  Two-way synchronization, triggered periodically.

Conclusion:
 The replication service can work with ACS if it supports the update
event notification as far as considering the two scenarios.

My impression and proposal:
 The replicator is supported to be highly sophisticated especially in
case of bi-directional synchronization. So I propose that ACS should
provide infrastructural functionalities such as notification mechanism
for the outer replication services instead of supporting replication
capability by itself.  
 This time I examined two scenarios to find out that the event mechanism
is required to realize them. There may be more replication scenarios
which have requirements for ACS spec. For example, the capability to get
change histories of an AA should be useful.

Your comments are very much welcomed.

Sachiko

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