streamcruncher Google Group

Re: streamcruncher stockpricecomparision problem

ashwin.jayaprak...@gmail.com (Ashwin) — Tue, 22 Apr 2008 05:26:57 UT

I don't see any problems. I just ran the Test case from the command
line and here are the results:

Use the StandAloneDemo.java test and change it to run the
H2StockPriceComparisonTest like this and compile it using
sc_compile_tests.bat and then run it using sc_run_standalone.bat

public void runATest() throws Exception {

streamcruncher stockpricecomparision problem

satish.se...@hcl.in (Satish Setty (HCL Financial Services)) — Mon, 21 Apr 2008 11:37:42 UT

Hi,
Thanks for good lightweight CEP product.
1. Need more information about aggregators, partitions, windows,
$row_status. Any links will be highly useful.
2. How are streamcruncher queries different from EQL?

Tried streamcruncher example (StockPriceComparisionTest) with H2 and
Oracle. Get problems

Derby examples error

rjawa...@gmail.com (jawa) — Wed, 09 Jan 2008 13:03:17 UT

While I try to run the Derby test samples using Derby server, I get
exceptions. A sample stacktrace is given below. Help needed. Thanks in
advance

Start up error
streamcruncher.api.StreamCrunc herException:
streamcruncher.innards.Innards ManagerException:
streamcruncher.innards.Innards ManagerException: Error occurred while

Re: is it possible to persist incoming events?

ashwin.jayaprak...@gmail.com (Ashwin) — Wed, 19 Dec 2007 23:45:29 UT

Hi Ron, Events aren't always put into the Database. StreamCruncher
puts Events into the Database only when there is a join across another
Event Stream or a regular Database Table (Master/Reference data
examples). Even so, such Events remain in the DB Tables as long as
they remain in the Windows. And, these tables are dynamically created,

is it possible to persist incoming events?

ronck...@gmail.com (Ron) — Tue, 18 Dec 2007 18:58:31 UT

Hi,

Since streamcruncher has an underlying database, is it possible to
have the events that are processed be permenantly stored into the db?
Also, if there was data in the db, could it be queried concurrently
with incoming events? In other words could one query reference
incoming events, and stored events too?

Re: Help! I can't run the demo

ashwin.jayaprak...@gmail.com (Ashwin) — Thu, 03 May 2007 12:34:19 UT

Hi,
H2 is part of the Installation. If you run the Demo, it uses H2 by
starting it in pure Memory mode. So, you won't find any DB files
there. And so, no User/Password either.
The error says that the Stream has already been registered. Which
might be because you killed/stopped the program in a previous run

Help! I can't run the demo

fanghuiminl...@gmail.com (Lily) — Wed, 02 May 2007 16:06:18 UT

Hi Ashwin,
I kept getting error when running the demo. Here is the output when I
run the latest demo:
May 2, 2007 11:55:47 AM streamcruncher.super.class o00000
INFO: Started
May 2, 2007 11:55:49 AM streamcruncher.C.super o00000
INFO: Started
May 2, 2007 11:55:49 AM streamcruncher.api.artifact.C o00000

Re: stupid sql query error :((

ashwin.jayaprak...@gmail.com (Ashwin) — Tue, 06 Feb 2007 01:37:06 UT

Hmm.. can you pls give me the DB name/version that you are using. I'll
see if I can replicate it.
Ashwin.

Re: What about performance ?

ashwin.jayaprak...@gmail.com (Ashwin) — Tue, 06 Feb 2007 01:29:30 UT

Hi Nicolas,
I'm sorry I don't have any Numbers. I don't have access to a good
Multi Proc machine. All I have is a 1.6 Gig Hz Laptop and I can't run
any decent tests because the Load/Data generator itself consumes most
of the CPU. Most of the operations are in-memory, including the DB and
there is little Disk-wait time for any Thread and so they compete

What about performance ?

nicolas.ja...@gmail.com — Mon, 05 Feb 2007 13:56:32 UT

Hi Ashwin,
I just found out the existence of your event processor.
Gosh, I've spent 6 months developing a similar product for my own
company...
I wish I knew this existed before, lol !
Do you have any performance results ?
I'll take a look at it, because it looks very interesting.
Thanks for this great design.

Re: stupid sql query error :((

amalia.pirvane...@gmail.com (AmaliaP) — Mon, 05 Feb 2007 08:36:33 UT

Here are the input stream and the running query I built.
//columns of the generated events
String[] columnNames = new String[]{
"id",
"idEventType",
"idLocation",
"value",
"obs",
"status",
"timestamp"};
String[] columnTypes = new String[]{

Re: stupid sql query error :((

ashwin.jayaprak...@gmail.com (Ashwin) — Sat, 03 Feb 2007 03:30:55 UT

The "unknown field idL" error is because of this - http://
groups.google.com/group/stream cruncher/t/f74ef614de2920a2?hl =en-GB.
You've already asked this before.

Re: stupid sql query error :((

ashwin.jayaprak...@gmail.com (Ashwin) — Sat, 03 Feb 2007 03:28:56 UT

Use the Partition clause:
select idLocation, idEventType, counter
from tbl_facts_stream
(partition by idLocation, idEventType store last 10 seconds with
count(idEventType) as counter)
as tbl_facts_p
where tbl_facts_p.$row_status is new;

stupid sql query error :((

amalia.pirvane...@gmail.com (AmaliaP) — Thu, 01 Feb 2007 13:12:46 UT

Hi
more newbie questions:
I have an input stream (columns: id, idL, idE, value) and I want to
make a running query that stores all data in the last 10 minutes and
counts the events with the same idL and idE. I run into some examples
from the SC site..and I finally got this query:
select idL, idE, event_counter from tblInputStream

Re: error when running the running query example

ashwin.jayaprak...@gmail.com (Ashwin) — Fri, 19 Jan 2007 12:33:50 UT

Yes, that's right.