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<p class="MsoNormal"><span style=font-size:16.0pt>Let’s say that a start-of-day, every day, we generate a giant 2,000+ rule .DRL, that we then use to construct into a
<b>single</b> run-time KnowledgeBase reference. We then construct a <b>single</b> run-time KnowledgeSession reference (also at start of day). Throughout the day, all day, facts “arrive” asynchronously into our expert system. When a fact “arrives”, we synchronously
place the fact onto our single KS and call .fireAllRules(), which in turn synchronously outputs answers that satisfy our “what’s the next step?” decision requirements.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style=font-size:16.0pt><o:p> </o:p></span></p>
<p class="MsoNormal"><span style=font-size:16.0pt>We have this working very well, but we have the ambition to achieve more. <o:p></o:p></span></p>
<p class="MsoNormal"><span style=font-size:16.0pt><o:p> </o:p></span></p>
<p class="MsoNormal"><span style=font-size:16.0pt>We want to attempt to scale this solution to accommodate the high-frequency simultaneous “arrival” of many facts. We have at our disposal a 24xCPU 128 gb Linux-based compute resource (nice, right?) … so,
ideally, we have the ambition to potentially accommodate the simultaneous arrival of 24 facts into our expert system.<o:p></o:p></span></p>
<p class="MsoNormal"><span style=font-size:16.0pt><o:p> </o:p></span></p>
<p class="MsoNormal"><span style=font-size:16.0pt>Assuming that all of our 2,000+ rules are completely isolated (i.e. no rule i ever depends on any rule j, for all i,j) we want to consider building (at start of day) a KSPool (size 24) , KBPool (size 24),
and a ThreadPoolExecutor (size 24, backed by BlockingQueue). As facts arrive throughout the day, those that arrive simultaneously are Queue’d to the TPE, that then delegates the fact’s need for service to a task Runnable, which in turn calls a KSPool[i].fireAllRules()
(with isolation to KBPool[i]). In such a scheme, we would potentially be able to render decisions concurrently when facts arrive simultaneously ( capacity 24).<o:p></o:p></span></p>
<p class="MsoNormal"><span style=font-size:16.0pt><o:p> </o:p></span></p>
<p class="MsoNormal"><span style=font-size:16.0pt>Is this design ambition common w/in current DROOLs use cases? Does the current (or future) DROOLS offering include any in-place capability to Pool KS or Pool KB? If not, are there any potential DROOLs concerns
or “gotchas” wrt to our pursuing this ambition (in a “let’s build this now!” prototype)?
<o:p></o:p></span></p>
<p class="MsoNormal"><span style=font-size:16.0pt><o:p> </o:p></span></p>
<p class="MsoNormal"><span style=font-size:16.0pt>As always, tremendous thanks to all in this community forum.<o:p></o:p></span></p>
<p class="MsoNormal"><span style=font-size:16.0pt><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style=font-size:12.0pt;color:gray><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style=color:gray>Ben D Cotton III</span></b><span style=font-size:9.0pt;color:gray><br />
Morgan Stanley & Co.<br />
OTC Derivatives Clearing Technology <br />
1221 AOTA Rockefeller Ctr - Flr 27<br />
New York, NY 10020<br />
(212)762.9094<br />
<a href="mailto:ben.cotton@ms.com"><span style=color:gray>ben.cotton@ms.com</span></a>
<o:p></o:p></span></p>
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