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Thursday, November 19, 2009

Reports and charts in your web app

recently i looked for a reporting solution for our Web application , i founded the next impressive products - i am sure there are much more :
RenderX.
Crystal reports.
and the lovelly open source solution BIRT.

i played with the BIRT in my eclipse and i get impressed from his drag and drop feature , and the ability to design charts, and use xml or db as a data source for my reports.For more info and step by step tutorial working with BIRT Library goto here, here is a good link about Deploying BIRT , BIRT have the ability to create and show charts as well, here is the Using the BIRT Report Viewer , anoter good design of BIRT PPT .
And here is the way to generate BIRT report via schedular without tomact.

About Charts in my web page - i think the jfreechart is the one - whatever is good for my banking is perfect for me.
another community project is the Jchart.

i am also looking for a work flow diagram to integrate into our Web solution , i found this java work flow solution - JDiagram .

enjoy
Yaniv T

Sunday, November 8, 2009

Create self signed Certificate for IIS via OpenSSL

hello
i follow the instruction at Creating a Self-Signed Certificate using OpenSSL for use with Microsoft Internet Information Services (IIS) and its works just fine with my IIS 5.1 on my XP sp2 laptop.

this article is very good and simple & clear.

Enjoy
Yaniv

Tuesday, November 3, 2009

Max Application memory size under AIX

First i like to mention a very good article that describe in more details this issue , 64-Bit Addressing for Technical Applications .

In general 32bit application under aix 5.X can use maximum 256M of memory - that not too match, to increase the memory you can use the next parameter while compile your application -bmaxdata.
The default value of maxdata (-bmaxdata:0 or not included in the load command) for 32-bit applications is 256 MB. The maximum allowed for 32-bit applications is 2 GB. For 64-bit applications, the maxdata default value is unlimited. A maximum can be imposed if restrictions are necessary, but a large limit doesn't penalize job or system performance.

These recommendations are applicable to most applications:
32-bit applications: -bmaxdata: 0x80000000 (eight 256 Mbyte segments)
64-bit applications: don't use -bmaxdata; the default is unlimited .

On later versions of AIX 5L (5.1 maintenance release 2 or higher), a new allocation scheme called dsa is available for 32-bit applications. It's specified by:
-bmaxdata:0x80000000/dsa

The difference between the 2 options is as follows:

Large address space model:
-bmaxdata:0x80000000 allows to use 8 segments (2GB) of data.

Very Large Address space model:
-bmaxdata:0xD0000000/dsa

Same as above but dsa = Dynamic Segment Allocation:
Segments are not saved for data area, but are obtained dynamically.
With dsa a program can have maximum 13 segments (3.25GB)

So if you don't need more than 2GB, you don't need dsa option.

read more about Large Program Support.

Now i hope you understand why you are getting yours segmentation fault.

Yaniv T