You are inserting a day's worth of backup events at a time. In this loop the engine is forced to evaluate both rules, for an ever-increasing number of events. It's the second rule that requires a comparison between any two backup events, and this causes a quadratic increment in processing time. <br>
<br>CEP is short for "continuous event processing", and that's what you should let the engine do, i.e., not only evaluate the conditions but also the execute the consequences. This is done by calling fireAllRules() after each insertion. Alternatively, consider running fireUntilHalt() in once thread and insert in another thread.<br>
<br>Ideally, the test should generate events ordered by time, and the pseudo-clock might be advanced due to the time stamp in the generated events. This would give you a very close approximation to a production run.<br><br>
-W<br><br><br><div class="gmail_quote">2010/12/26 radai <span dir="ltr"><<a href="mailto:radai.rosenblatt@gmail.com">radai.rosenblatt@gmail.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
well, fixed now :-)<br>the benchmark (part of a junit) looks like this:<br><br>protected void init() {<br> KnowledgeBuilderConfiguration bConf = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration();<br> KnowledgeBuilder builder = KnowledgeBuilderFactory.newKnowledgeBuilder(bConf);<br>
builder.add(...);<br><br> KnowledgeBaseConfiguration kbConf = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();<br> kbConf.setOption( EventProcessingOption.STREAM );<br> //todo - turn this on when <a href="https://issues.jboss.org/browse/JBRULES-2845" target="_blank">https://issues.jboss.org/browse/JBRULES-2845</a> is fixed<br>
//kbConf.setOption( MultithreadEvaluationOption.YES );<br> kb = KnowledgeBaseFactory.newKnowledgeBase(kbConf);<br> kb.addKnowledgePackages(builder.getKnowledgePackages());<br><br> KnowledgeSessionConfiguration sConf = KnowledgeBaseFactory.newKnowledgeSessionConfiguration();<br>
sConf.setOption(ClockTypeOption.get("pseudo"));<br> Environment env = EnvironmentFactory.newEnvironment();<br> s = kb.newStatefulKnowledgeSession(sConf ,env);<br><br> clock = (SessionPseudoClock) s.getSessionClock();<br>
<br> backupStream = s.getWorkingMemoryEntryPoint("Backup Stream");<br>}<br><br>followed by a test method that looks like this:<br><br>public void testLargeBatches() {<br><br> Node node1 = new Node("node 1");<br>
node1.setId(1L);<br> s.insert(node1);<br> s.fireAllRules();<br><br> clock.advanceTime(1L, TimeUnit.DAYS);<br> s.fireAllRules();<br><br> int batchSize = 40000;<br> int daysToRun = 1;<br>
ArrayList<Backup> batch = new ArrayList<Backup>(batchSize);<br> ArrayList<Long> nodeIds = new ArrayList<Long>();<br> nodeIds.add(1L);<br> DateTime engineTime;<br><br> long start;<br>
long accumulated = 0;<br><br> System.err.println("days: "+daysToRun+". batch: "+batchSize+". rules: "+ruleFile);<br><br> for (int i=0; i<daysToRun; i++) {<br> engineTime = new DateTime(clock.getCurrentTime(), DateTimeZone.UTC);<br>
batch.clear();<br> //generate random<br> BackupGenerationUtil.fillBackupBatch(batch, nodeIds, engineTime.minusHours(23).minusMinutes(59).minusSeconds(59), engineTime.minusSeconds(1), batchSize);<br>
<br> start = System.currentTimeMillis();<br><br> //feed the batch in<br> for (Backup b : batch) {<br> backupStream.insert(b);<br> }<br><br> //advance a day and run all rules<br>
s.fireAllRules();<br> clock.advanceTime(1L, TimeUnit.DAYS);<br> s.fireAllRules();<br><br> accumulated += (System.currentTimeMillis() - start);<br> }<br><br> long averageBatchProcessingTime = (long)(accumulated/(double)daysToRun);<br>
double perBackupEventTime = ((double)accumulated)/(batchSize*daysToRun);<br> int eventsPerSecond = (int)(1000D/perBackupEventTime);<br><br> System.err.println("average batch processing time is "+averageBatchProcessingTime+" which is "+perBackupEventTime+"/event or "+eventsPerSecond+" events/second");<br>
}<br><br>running this with or without the 2nd "trimming" rules makes a huge difference. on my machine i can run the non-trimming version in batches of 300K @~2500 events/second @1GB RAM. with the trimming rule i cant get anywhere near that - the above value (40K) is already enough to slow it down to ~1800 events/second, and i dont understand whats so "heavy" about my attempt to save memory.<br>
<br>any help/thoughts/clues would be most welcome.<br><br><br><div class="gmail_quote">2010/12/23 Mauricio Salatino <span dir="ltr"><<a href="mailto:salaboy@gmail.com" target="_blank">salaboy@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
hehe yes.. the same happens to "me" :)<br><br><div class="gmail_quote">2010/12/23 Wolfgang Laun <span dir="ltr"><<a href="mailto:wolfgang.laun@gmail.com" target="_blank">wolfgang.laun@gmail.com</a>></span><div>
<div></div><div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
(OT: your nick "me" is confusing other gmail users. I see your mail as if I had sent it to myself. I was almost binning it.)<br><br>The delay you see may depend on the way you run the test with 40K events. Please describe the sequence of insertions and calls to fire...(), the session setup (pseudo-clock, etc.)<br>
<br>-W<br><br><br><div class="gmail_quote">2010/12/23 me <span dir="ltr"><<a href="mailto:radai.rosenblatt@gmail.com" target="_blank">radai.rosenblatt@gmail.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div></div><div>
Hi.<br><br>im trying to demo drools-fusion for a system that processes backup events. <br>i have the following 2 CEP rules:<br><br>rule "Backup Not Succeeded For At Least 3 Days"<br>@ruleId(1)<br>when<br> Node($id : id)<br>
not ( Backup(clientId == $id, $state: state == BackupStateEnum.FINISHED) over window:time( 3d ) from entry-point "Backup Stream" )<br>then<br> //nothing for now<br>end<br><br>rule "Prune Previous Successful Backups"<br>
@ruleId(2)<br>when<br> $prevBackup : Backup($id : clientId, state == BackupStateEnum.FINISHED) from entry-point "Backup Stream"<br> $newerBackup : Backup(clientId == $id, state == BackupStateEnum.FINISHED, this after $prevBackup) from entry-point "Backup Stream"<br>
then<br> drools.retract($prevBackup);<br>end<br><br>rule #2 is my attempt to cut down on memory usage. the problem is that rule #2 slows down the processing very very considerably (2 orders of magnitude slower when simulating batches of 40K events/day).<br>
<br>what would be my next step in trying to find the reason for it? my intuition tells me that with 2 events in the system at any given time instead of 120K (single node, 40K events/day 3 day window) i should have seen either a speedup or reduced memory consumption (if not both) and yet the results im seeing are the exact opposite.<br>
is there anything im missing ? i could try adding some sort of LastSuccessfulBackup "marker" object into main memory and updating it using events from the backup stream, but then how would i express rule #1 ?<br>
<br>any help/clues/suggestions would be greatly appreciated,<br><br> radai.<br>
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<br></blockquote></div></div></div><font color="#888888"><br><br clear="all"><br>-- <br> - CTO @ <a href="http://www.plugtree.com" target="_blank">http://www.plugtree.com</a> <br> - MyJourney @ <a href="http://salaboy.wordpress.com" target="_blank">http://salaboy.wordpress.com</a><br>
- Co-Founder @ <a href="http://www.jbug.com.ar" target="_blank">http://www.jbug.com.ar</a><br> <br> - Salatino "Salaboy" Mauricio -<br>
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