Terracotta Discussion Forums (LEGACY READ-ONLY ARCHIVE)

The linux server (one for the Terracotta server and one for client)
are hp dl380 with linux red-hat ES 3 with 4 cpu (Intel(R) Xeon(TM) CPU 2.80GHz) and 1Gb of ram, the window xp professional sp2 pc is a hp nc6120 with 512 Mb of ram and pentium M 1.6 Mhz.
the vm option are: -Xms128M -Xmx128M

In attachment you can find a document that explain the scenario.

Let me know if exists an other way to implement this scenario to have best performance.
Thanks.

Hi, thanks for the reply
I'll try to describe our intentions in the follow;
the purpose of the code I have posted is to see the performance of terracotta
under stress test (for this reason I've choosen to synchronize each iteration )
my application contest is the follow:
I have a "cluster" (different jvm on different hw node) that share a HashMap and concurrently access (in read and/or write mode on multiple key in different piece of code so I need to explicitly manage the transaction with synchronize block) this structure (whithin a transaction for consistence purpose) to execute some services;
I need to have high performance (this application is related to application server SIP in telco environment); I'de like to understand if the performance (that are not so good) I've seen is concerned to a configuration problem or (as you suggest) implementation problem. Could you suggest me how to resolve this scenario and how to prepare a stress test for this contest?
Have you a benchmark of your system that I can read?
Let me know if you need more information.
Thanks.

Hi, I’ am trying to test the performance of Terracotta product.

I use this scenarious:

1) Terracotta Server run on Linux Server using 1.4.2_04 java version

2) Terracotta Client run on WindowsXP using 1.4.2_05 java version

3) Terracotta Client run on Linux Server using 1.4.2_04 java version

In attachment you can find the main class of the client, InfoHash class, and the config file that I use to perform the tests.

I run the first client with this arguments :

0 1000 N

that insert 1000 objects (InfoHash) in the HashMap with key from 0 to 999

I run the second client with this arguments :

1000 2000 N

that insert 1000 objects (InfoHash) in the HashMap with key from 1000 to 1999

The results are:

1) If I run only one client, it performs all test in ~ 2,3 sec

2) If I run clients in parallel, the times increase infact each client employ ~10 sec

Is there a way to increase the performance? For us these results, are not very good.

It seems the server to be the bottleneck of system

May the limit to 4 clients (if it refers to channel not to the number of application) affect the performances?

If yes could you give us a trial license and commercial information.

Have you same benchmark result that can give us some idea related to performance issue?

We appreciate any help.

Thanks