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<DIV><FONT face=Arial size=2><SPAN class=764082208-26012007>Hi
all,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=764082208-26012007>I have to evaluate
if JBoss Rules is a viable solution in this scenario:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=764082208-26012007>We have to monitor a
large network using performance alarms. These alarms arrive every 15 minutes. We
don't know the real rate, but peaks of many tens of thousands of alarms every 15
minutes must be managed in a timely way.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=764082208-26012007>We want to use JBoss
Rules to correlate these alarms, in order to show less higher level alarms
to the users .</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=764082208-26012007>We have basically 2
use cases:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=764082208-26012007>1) I have to
correlate the alarms on a single node of the network. (for example
in node A I have 2 alarms of different severity about the connection
with node B, so I aggregate everything in a third alarm saying "I cannot connect
to node B from node A"). In this scenario I have many workingMemories (one for
each node) and not so many facts for each working memory. The performance of
JBossRules is very very good (almost linear with the number of
nodes)</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=764082208-26012007>2) I have to
correlate alarms among the nodes. (for example all nodes connecting with a node
A have an alarm "I cannot connect to node A from node ...", I want to
create an alarm "The node A is unreachable").</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=764082208-26012007>In this scenario I'm
very worried about the performance of JBoss Rules, as I prepared a test case (in
attachment) and I inferred that the growth is highly non linear on the number of
the facts. Is this performance data wrong? Am I doing something stupid? Can
someone comment?</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=764082208-26012007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=764082208-26012007>Here are the numbers
(The numbers are not so important, but rate they grows
is)</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=764082208-26012007></SPAN></FONT> </DIV><FONT size=2><SPAN
class=764082208-26012007>
<DIV>
<TABLE style="WIDTH: 392pt; BORDER-COLLAPSE: collapse" cellSpacing=0
cellPadding=0 width=523 border=0 x:str>
<COLGROUP><FONT face=Arial>
<COL style="WIDTH: 83pt; mso-width-source: userset; mso-width-alt: 4059"
width=111>
<COL style="WIDTH: 128pt; mso-width-source: userset; mso-width-alt: 6253"
span=2 width=171>
<COL style="WIDTH: 53pt; mso-width-source: userset; mso-width-alt: 2560"
width=70></FONT>
<TBODY>
<TR style="HEIGHT: 12.75pt" height=17>
<TD class=xl26
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 83pt; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12.75pt; BACKGROUND-COLOR: transparent"
width=111 height=17><FONT face=Arial size=2><STRONG>Number of
Facts</STRONG></FONT></TD>
<TD class=xl26
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext; WIDTH: 128pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
width=171><FONT face=Arial size=2><STRONG>Time to assert alla the new
allarms (seconds)</STRONG></FONT></TD>
<TD class=xl26
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext; WIDTH: 128pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
width=171><FONT face=Arial size=2><STRONG>Time to modify the alarms to
close them (seconds)</STRONG></FONT></TD>
<TD class=xl26
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext; WIDTH: 53pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
width=70><STRONG><FONT face=Arial size=2>Total</FONT></STRONG></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD class=xl24
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12.75pt; BACKGROUND-COLOR: transparent"
align=right height=17 x:num><FONT face=Arial size=2>1000</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="1.7350000000000001"><FONT face=Arial
size=2>1.735</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="0.96899999999999997"><FONT face=Arial
size=2>0.969</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="2.7040000000000002" x:fmla="= C2 + B2"><FONT face=Arial
size=2>2.704</FONT></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD class=xl24
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12.75pt; BACKGROUND-COLOR: transparent"
align=right height=17 x:num><FONT face=Arial size=2>2000</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="5.875"><FONT face=Arial size=2>5.875</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num><FONT face=Arial size=2>3.000</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="8.875" x:fmla="= C3 + B3"><FONT face=Arial
size=2>8.875</FONT></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD class=xl24
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12.75pt; BACKGROUND-COLOR: transparent"
align=right height=17 x:num><FONT face=Arial size=2>3000</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="12.281000000000001"><FONT face=Arial
size=2>12.281</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="6.4059999999999997"><FONT face=Arial
size=2>6.406</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="18.687000000000001" x:fmla="= C4 + B4"><FONT face=Arial
size=2>18.687</FONT></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD class=xl24
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12.75pt; BACKGROUND-COLOR: transparent"
align=right height=17 x:num><FONT face=Arial size=2>4000</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="23.672000000000001"><FONT face=Arial
size=2>23.672</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="11.672000000000001"><FONT face=Arial
size=2>11.672</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="35.344000000000001" x:fmla="= C5 + B5"><FONT face=Arial
size=2>35.344</FONT></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD class=xl24
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12.75pt; BACKGROUND-COLOR: transparent"
align=right height=17 x:num><FONT face=Arial size=2>6000</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="52.281999999999996"><FONT face=Arial
size=2>52.282</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num><FONT face=Arial size=2>23.250</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="75.531999999999996" x:fmla="= C6 + B6"><FONT face=Arial
size=2>75.532</FONT></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD class=xl24
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12.75pt; BACKGROUND-COLOR: transparent"
align=right height=17 x:num><FONT face=Arial size=2>8000</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="87.188000000000002"><FONT face=Arial
size=2>87.188</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="42.531999999999996"><FONT face=Arial
size=2>42.532</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num x:fmla="= C7 + B7"><FONT face=Arial
size=2>129.720</FONT></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD class=xl24
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12.75pt; BACKGROUND-COLOR: transparent"
align=right height=17 x:num><FONT face=Arial size=2>12000</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="200.767"><FONT face=Arial size=2>200.767</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="94.641999999999996"><FONT face=Arial
size=2>94.642</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="295.40899999999999" x:fmla="= C8 + B8"><FONT face=Arial
size=2>295.409</FONT></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD class=xl24
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12.75pt; BACKGROUND-COLOR: transparent"
align=right height=17 x:num><FONT face=Arial size=2>16000</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="360.90899999999999"><FONT face=Arial
size=2>360.909</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="176.57900000000001"><FONT face=Arial
size=2>176.579</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="537.48800000000006" x:fmla="= C9 + B9"><FONT face=Arial
size=2>537.488</FONT></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD class=xl24
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 12.75pt; BACKGROUND-COLOR: transparent"
align=right height=17 x:num><FONT face=Arial size=2>20000</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="518.01900000000001"><FONT face=Arial
size=2>518.019</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="263.15800000000002"><FONT face=Arial
size=2>263.158</FONT></TD>
<TD class=xl25
style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"
align=right x:num="781.17700000000002" x:fmla="= C10 + B10"><FONT
face=Arial size=2>781.177</FONT></TD></TR></TBODY></TABLE></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><SPAN class=764082208-26012007><FONT face=Arial>Or in a
graph:</FONT></SPAN></DIV>
<DIV><SPAN class=764082208-26012007><IMG alt="" hspace=0
src="cid:764082208@26012007-12CF" align=baseline
border=0></SPAN></DIV></SPAN></FONT>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><SPAN class=764082208-26012007><FONT face=Arial size=2>Thanks a lot for
your interest.</FONT></SPAN></DIV>
<DIV align=left><IMG height=100 src="cid:764082208@26012007-12B3"
width=250></DIV>
<DIV> </DIV><DIV><FONT size=2><FONT
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