Re: [rules-users] Drools 4 poor performance scaling?
Ron,
Can you send me your project in zip, i'd be interesting to see this.
Mark
Ron Kneusel wrote:
I am testing Drools 4 for our application and while sequential mode is very
fast I get very poor scaling when I increase the number of facts for stateful
or stateless sessions. I want to make sure I'm not doing something foolish
before deciding on whether or not to use Drools because from what I am reading
online it should be fast with the number of facts I have.
The scenario: I have 1000 rules in a DRL file. They are all of the form:
rule rule
when
Data(type == 0, value> 0.185264);
Data(type == 3, value < 0.198202);
then
insert(new AlarmRaised(0));
warnings.setAlarm(0, true);
end
where the ranges checked on the values and the types are randomly generated.
Then, I create a Stateful session and run in a loop timing how long it takes
the engine to fire all rules as the number of inserted facts increases:
// Run
for(j=0; j < 100; j+=5) {
if (j==0) {
nfacts = 1;
} else {
nfacts = j;
}
System.out.println(nfacts + ":");
// Get a working memory
StatefulSession wm = ruleBase.newStatefulSession();
// Global - output
warnings = new Alarm();
wm.setGlobal("warnings", warnings);
// Add facts
st = (new Date()).getTime();
for(i=0; i < nfacts; i++) {
wm.insert(new Data(rand.nextInt(4), rand.nextDouble()-0.5));
}
en = (new Date()).getTime();
System.out.println("facts = " + (en-st));
// Now run the rules
st = (new Date()).getTime();
wm.fireAllRules();
en = (new Date()).getTime();
System.out.println("rules = " + (en-st));
// Clean up
wm.dispose();
System.out.println("\n");
}
This code is based on the HelloWorldExample.java code from the manual and the
setup for the rule base is the same as in the manual. As the number of facts
increases runtime increases dramatically:
facts -- runtime (ms)
10 -- 168
20 -- 166
30 -- 344
40 -- 587
50 -- 1215
60 -- 1931
70 -- 2262
80 -- 3000
90 -- 4754
with a maximum memory use of about 428 MB RAM. By contrast, if I use
sequential stateless sessions, everything runs in about 1-5 ms.
Is there something in my set up that would cause this, or is this how one would
expect Drools to scale? I read about people using thousands of facts so I
suspect I'm setting something up incorrectly.
Any help appreciated!
Ron
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[rules-users] Drools 4 poor performance scaling?
I am testing Drools 4 for our application and while sequential mode is very
fast I get very poor scaling when I increase the number of facts for stateful
or stateless sessions. I want to make sure I'm not doing something foolish
before deciding on whether or not to use Drools because from what I am reading
online it should be fast with the number of facts I have.
The scenario: I have 1000 rules in a DRL file. They are all of the form:
rule rule
when
Data(type == 0, value> 0.185264);
Data(type == 3, value < 0.198202);
then
insert(new AlarmRaised(0));
warnings.setAlarm(0, true);
end
where the ranges checked on the values and the types are randomly generated.
Then, I create a Stateful session and run in a loop timing how long it takes
the engine to fire all rules as the number of inserted facts increases:
// Run
for(j=0; j < 100; j+=5) {
if (j==0) {
nfacts = 1;
} else {
nfacts = j;
}
System.out.println(nfacts + ":");
// Get a working memory
StatefulSession wm = ruleBase.newStatefulSession();
// Global - output
warnings = new Alarm();
wm.setGlobal("warnings", warnings);
// Add facts
st = (new Date()).getTime();
for(i=0; i < nfacts; i++) {
wm.insert(new Data(rand.nextInt(4), rand.nextDouble()-0.5));
}
en = (new Date()).getTime();
System.out.println("facts = " + (en-st));
// Now run the rules
st = (new Date()).getTime();
wm.fireAllRules();
en = (new Date()).getTime();
System.out.println("rules = " + (en-st));
// Clean up
wm.dispose();
System.out.println("\n");
}
This code is based on the HelloWorldExample.java code from the manual and the
setup for the rule base is the same as in the manual. As the number of facts
increases runtime increases dramatically:
facts -- runtime (ms)
10 -- 168
20 -- 166
30 -- 344
40 -- 587
50 -- 1215
60 -- 1931
70 -- 2262
80 -- 3000
90 -- 4754
with a maximum memory use of about 428 MB RAM. By contrast, if I use
sequential stateless sessions, everything runs in about 1-5 ms.
Is there something in my set up that would cause this, or is this how one would
expect Drools to scale? I read about people using thousands of facts so I
suspect I'm setting something up incorrectly.
Any help appreciated!
Ron
_
The other season of giving begins 6/24/08. Check out the i’m Talkathon.
http://www.imtalkathon.com?source=TXT_EML_WLH_SeasonOfGiving
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RE: [rules-users] QueryResult.getFactHandles bug?
Looks like there's a JIRA for this now. Some feedback would have been
nice, however.
http://jira.jboss.com/jira/browse/JBRULES-1649
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Fenderbosch,
Eric
Sent: Monday, June 16, 2008 11:00 AM
To: Rules Users List
Subject: RE: [rules-users] QueryResult.getFactHandles bug?
Any feedback on this? Just curious, we've worked around it, but I'd
like to know if my assumption was wrong or if this is an actual problem.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Fenderbosch,
Eric
Sent: Monday, June 09, 2008 11:39 AM
To: rules-users@lists.jboss.org
Subject: [rules-users] QueryResult.getFactHandles bug?
I didn't find a JIRA for this and I'm pretty sure my test is valid.
QueryResult.getFactHandles() seems to be only returning [fid:-1:X:null]
I'm using 4.0.7.
Here's my test case:
public void testQueryResults() throws Exception {
StatefulSession workingMemory = DroolsUtil.getWorkingMemory();
TestFact testFact = new TestFact();
String id = "1234";
testFact.setId(id);
FactHandle testHandle = workingMemory.insert(testFact);
System.out.println(testHandle);
Object[] args = {id};
int resultCount = 0;
int factCount = 0;
int handleCount = 0;
Object fact = null;
FactHandle handle = null;
// query getTestFact(String _id)
// TestFact(id == _id)
// end
QueryResults queryResults =
workingMemory.getQueryResults("getTestFact", args);
Iterator iterator = queryResults.iterator();
while (iterator.hasNext()) {
resultCount++;
QueryResult result = iterator.next();
FactHandle[] handles = result.getFactHandles();
for (FactHandle h : handles) {
handleCount++;
handle = h;
}
for (int i = 0; i < result.size(); i++) {
factCount++;
fact = result.get(i);
}
}
System.out.println(handle);
assertTrue(resultCount == 1);
assertTrue(factCount == 1);
assertTrue(testFact == fact);
assertTrue(handleCount == 1);
// this fails
assertTrue(testHandle == handle);
}
TestFact is very simple, using id in hashCode and equals.
Am I using getFactHandles correctly?
Thanks.
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RE: [rules-users] Stateless session and rule flows
Somewhat better than my reply, now where was that stone I crawled from
under? ;-)
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Kris Verlaenen
Sent: 26 June 2008 15:49
To: Rules Users List
Subject: Re: [rules-users] Stateless session and rule flows
Use a rule (probably without conditions and high salience) to start your
ruleflow:
rule "Start Process" salience 10
when
then
drools.getWorkingMemory().startProcess("yourName");
end
Kris
- Original Message -
From: "Yoni Mazar" <[EMAIL PROTECTED]>
To:
Sent: Thursday, June 26, 2008 4:30 PM
Subject: [rules-users] Stateless session and rule flows
>
> Hi Guys,
>
> We are trying to work with drools with stateless session (Sequential) and
> to
> apply rule flows.
>
> we use the following code:
>
> //define diagnosis and patient here
> ...
>
> StatelessSession session = ruleBase.newStatelessSession();
> //Here we would like to use: session.startProcess("ruleflow id") but this
> is
> a method which belongs to
> //StatefullSession only.
> session.execute(new Object[] {diagnosis, patient});
>
> How can we do that in steteless mode?
>
> Thanks,
>
> Yoni
> --
> View this message in context:
>
http://www.nabble.com/Stateless-session-and-rule-flows-tp17863849p17863849.h
tml
> Sent from the drools - user mailing list archive at Nabble.com.
>
> ___
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RE: [rules-users] Stateless session and rule flows
Hi,
I believe Stateless session is only a wrapper around a stateful session, so
you're only gaining convenience by using a Stateless one.
Why not write your own wrapper that allows for the execution of a rule flow
too?
Cheers,
Mike
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Yoni Mazar
Sent: 26 June 2008 15:31
To: rules-users@lists.jboss.org
Subject: [rules-users] Stateless session and rule flows
Hi Guys,
We are trying to work with drools with stateless session (Sequential) and to
apply rule flows.
we use the following code:
//define diagnosis and patient here
...
StatelessSession session = ruleBase.newStatelessSession();
//Here we would like to use: session.startProcess("ruleflow id") but this is
a method which belongs to
//StatefullSession only.
session.execute(new Object[] {diagnosis, patient});
How can we do that in steteless mode?
Thanks,
Yoni
--
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tml
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Re: [rules-users] Stateless session and rule flows
Use a rule (probably without conditions and high salience) to start your
ruleflow:
rule "Start Process" salience 10
when
then
drools.getWorkingMemory().startProcess("yourName");
end
Kris
- Original Message -
From: "Yoni Mazar" <[EMAIL PROTECTED]>
To:
Sent: Thursday, June 26, 2008 4:30 PM
Subject: [rules-users] Stateless session and rule flows
Hi Guys,
We are trying to work with drools with stateless session (Sequential) and
to
apply rule flows.
we use the following code:
//define diagnosis and patient here
...
StatelessSession session = ruleBase.newStatelessSession();
//Here we would like to use: session.startProcess("ruleflow id") but this
is
a method which belongs to
//StatefullSession only.
session.execute(new Object[] {diagnosis, patient});
How can we do that in steteless mode?
Thanks,
Yoni
--
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RE: [rules-users] Package parameters
Hi,
I don't think Drools supports this directly, but would this not be as
accomplishable with DSL?
Your Drools rule could then be written something like this (bare in mind I'm
no DSL expert):-
DSL:
[when]There is a hemoglobin lab result with=LabResult(type==hemoglobin)
[when]- a value less than {v}=value<{v}
Rule:
There is a hemoglobin lab result with
- a value less than 42
With kind regards,
Mike
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Yoni Mazar
Sent: 26 June 2008 15:29
To: rules-users@lists.jboss.org
Subject: [rules-users] Package parameters
Hi all,
We are at the begining of a new clinical decision-support project. We are
considering using a BRMS to manage and execute our business logic. As part
of our research, we evaluated JRules and Drools. JRules has a nice feature
that we could not find in Drools. We'd like to know if we are
misunderstanding something, or maybe this feature is missing.
In JRules, one can define a ruleset (corresponds to a package) with
parameters. Each parameter has a datatype (a class), a direction
(in/out/inout), and an alias. Then, within the rules, the user can refer to
the parameter alias. For example, a user can define a ruleset with the
following parameters:
*class=LabResult, direction=in, alias=hemoglobin
*class=LabResult, direction=in, alias=creatinin
Then, within a rule, one can write:
when hemoglobin.value<10 and creatinin.value>34
then...
Now, the application retrieves the patient data accordingle (hemoglobin and
creatinine data separetly) and sets the ruleset parameters:
ruleset.parameters.add("hemoglobin",hemoglobinFact)
ruleset.parameters.add("creatinin",creatininFact)
This approach simplifies the rule authoring process significantly!
Writing this logic in Drools will be:
package cdss
import LabResult;
rule
when
LabResult(type=hemoglobin && value <10)
LabResult(type=creatinin&& value <34)
then...
workingMemory.Assert(hemoglobinFact);
workingMemory.Assert(creatininFact);
Does someone has an idea how to bridge this gap using Drools?
Im not sure if using parameters JRule complies with JSR94 specification.
Thanks,
Yoni
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[rules-users] Data Enumerations in Drools using Eclipse IDE
Hi Guys, According to what I understood from the manual, it is possible to create data enumerations ONLY when using the BRMS and not when using the Eclipse IDE. Is that correct? If so, are there any plans to add this functionality to the Eclipse IDE in the near future? Thanks, Yoni -- View this message in context: http://www.nabble.com/Data-Enumerations-in-Drools-using-Eclipse-IDE-tp17864475p17864475.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Stateless session and rule flows
Hi Guys,
We are trying to work with drools with stateless session (Sequential) and to
apply rule flows.
we use the following code:
//define diagnosis and patient here
...
StatelessSession session = ruleBase.newStatelessSession();
//Here we would like to use: session.startProcess("ruleflow id") but this is
a method which belongs to
//StatefullSession only.
session.execute(new Object[] {diagnosis, patient});
How can we do that in steteless mode?
Thanks,
Yoni
--
View this message in context:
http://www.nabble.com/Stateless-session-and-rule-flows-tp17863849p17863849.html
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[rules-users] Package parameters
Hi all,
We are at the begining of a new clinical decision-support project. We are
considering using a BRMS to manage and execute our business logic. As part
of our research, we evaluated JRules and Drools. JRules has a nice feature
that we could not find in Drools. We'd like to know if we are
misunderstanding something, or maybe this feature is missing.
In JRules, one can define a ruleset (corresponds to a package) with
parameters. Each parameter has a datatype (a class), a direction
(in/out/inout), and an alias. Then, within the rules, the user can refer to
the parameter alias. For example, a user can define a ruleset with the
following parameters:
*class=LabResult, direction=in, alias=hemoglobin
*class=LabResult, direction=in, alias=creatinin
Then, within a rule, one can write:
when hemoglobin.value<10 and creatinin.value>34
then...
Now, the application retrieves the patient data accordingle (hemoglobin and
creatinine data separetly) and sets the ruleset parameters:
ruleset.parameters.add("hemoglobin",hemoglobinFact)
ruleset.parameters.add("creatinin",creatininFact)
This approach simplifies the rule authoring process significantly!
Writing this logic in Drools will be:
package cdss
import LabResult;
rule
when
LabResult(type=hemoglobin && value <10)
LabResult(type=creatinin&& value <34)
then...
workingMemory.Assert(hemoglobinFact);
workingMemory.Assert(creatininFact);
Does someone has an idea how to bridge this gap using Drools?
Im not sure if using parameters JRule complies with JSR94 specification.
Thanks,
Yoni
--
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http://www.nabble.com/Package-parameters-tp17979190p17979190.html
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Re: [rules-users] Eclipse plugin error: DRL-files in multiple folders?
The IDE allows you to define shared definitions (e.g. functions and imports) in a file with extension .package (instead of the normal .drl). This .package file should be in the same directory as the rules that use it, the IDE is not capable of searching other folders at this point. Kris - Original Message - From: "Tobias Abstreiter" <[EMAIL PROTECTED]> To: Sent: Tuesday, June 24, 2008 6:41 PM Subject: [rules-users] Eclipse plugin error: DRL-files in multiple folders? Hi! I have a problem using the drools Eclipse plugin 4.0.7 (with Drools 4.0.7). In our project rules are located in different folders. One of it is called "global" (containing many functions, imports, ...) whereon most of the rules in the other folders depend. The package name is identical. Running the application works fine but the Eclipse plugin reports many "... cannot be resolved"-errors when I convert the Eclipse Java project into a Drools project. I believe that the plugin has problems to find all rule files. Is that possible? Is there a way to tell the plugin to look in multiple rule-folders? Thanks in advance, Tobias __ MicroNova electronic GmbH Tobias Abstreiter Telekommunikation & Netzmanagment Unterfeldring 17 D-85256 Vierkirchen Tel.: +49 (08139) 93 00-42 Fax.: +49 (08139) 93 00-80 eMail: [EMAIL PROTECTED] Web: http://www.micronova.de Geschäftsführer: Josef W. Karl - Sitz der Gesellschaft: Jetzendorf Registergericht: Ingolstadt - HRB-Nr.: 181 373 __ ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] DSL debugging?
Are you loading your DSL rules using PackageBuilder.addPackageFromDrl(Reader
source, Reader dsl) ?
Kris
- Original Message -
From: "Barry Kaplan" <[EMAIL PROTECTED]>
To:
Sent: Tuesday, June 24, 2008 7:33 PM
Subject: [rules-users] DSL debugging?
I have a very simple DSL snippet:
PPositionQuantityAllocatedToLegs {position} {rulePriority}=
Integer(intValue < {position}.quantity) from accumulate(
StrategyLeg(priority > {rulePriority}, instrument ==
{position}.instrument,
longShort == {position}.longShort, legQuantity : quantity)
legsQuantity(legQuantity) )
In the IDE it seems to expand correctly without errors. However, at
runtime
I get the below error. How does one decipher such a message?
Caused by: org.drools.rule.InvalidRulePackage: [20,0]: unknown:20:0
mismatched token: [EMAIL PROTECTED],506:513='expander',<7>,20:0];
at org.drools.rule.Package.checkValidity(Package.java:424)
at
org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:394)
at
com.sig.buyingpower.DroolsOptionStrategyBuyingPowerPositionAggregator.loadRules(DroolsOptionStrategyBuyingPowerPositionAggregator.java:91)
at
com.sig.buyingpower.DroolsOptionStrategyBuyingPowerPositionAggregator.(DroolsOptionStrategyBuyingPowerPositionAggregator.java:117)
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Re: [rules-users] Problems with drools-4.0.7 examples
FYI, cleaning and rebuilding the project solved the problem for me. So, here are the steps I took, for future reference: 1. Imported the drools-examples project 2. Removed the drools-compiler and drools-core from the project build path 3. Right-clicked the project and selected convert to drools 4. Selected Project > Clean On Tue, Jun 24, 2008 at 12:56 PM, Stephen Schaub <[EMAIL PROTECTED]> wrote: > Thanks for the tip, Mark. I did what you suggested, and got the > necessary libraries added to the project build configuration. > > I can run the HelloWorldExample, and there are no compile errors for > any of the .java project files. However, there are still lots of > errors reported for the .drl files. When I open the HelloWorld.drl > file and attempt to click the Rete Tree tab at the bottom of the > editor, I get the message: > > Rete Tree Build Error! > Reason: > Unable to parse rules to show RETE view! > > Am I missing something? > > Stephen > > On Tue, Jun 24, 2008 at 10:18 AM, Mark Proctor <[EMAIL PROTECTED]> wrote: >> it seems an incorrect .project was committed, it's easy to fix. Just remove >> anything from the project dependencies and then right click and select >> "convert to drools" >> >> Should do the job. >> >> Mark >> Stephen Schaub wrote: >>> >>> I am new to Drools. >>> >>> I downloaded the drools-4.0.7 examples from >>> >>> >>> http://download.jboss.org/drools/release/4.0.7.19894.GA/drools-4.0.7-examples.zip >>> >>> I have Eclipse 3.3 with the GEF dependency, and installed the Drools >>> plugins. I then imported the drools examples into a clean Eclipse >>> workspace. I'm getting many errors reported in the Eclipse Problems >>> view on the .drl files. >>> >>> I attempted to run the HelloWorldExample, and got a runtime error. I >>> checked the build path of the project, and it references >>> drools-compiler and drools-core projects, neither of which are in my >>> workspace. I manually removed these, and added the dependencies >>> mentioned in the Drools README_DEPENDENCIES.txt. >>> >>> I looked around for info on setting up the drools examples, and didn't >>> find any. I would appreciate a pointer... >>> >>> >> >> ___ >> rules-users mailing list >> rules-users@lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> > > > > -- > Stephen Schaub > -- Stephen Schaub ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
