Too many sockets being created. Bad architecture?

[kk kk <ki...@yahoo.ie>]

Hi,

I am developing a WS which provides an operation that
takes around 25 seconds to complete. I can not speed
this up nor I can not use a polling pattern or a
callback to inform the client of the result of the
request.

I want to make the WS server capable to handle 100 new
requests per second, so 100 x 25 = 2500 sockets
connections will exist at any point in time with my
current design !! I am sure this is bad but am not
sure what is the best way to go to get a scalable
solution with a single server process.

I am using Axis 1.2 and Tomcat on the server which is
a Sun Solaris box. My test client is a Axis/Java
application though I need to be able to support other
clients too. 

As expected, I can see huge numbers of open sockets
and FDs using unix commands like netstat and lsof.

I have been experimenting with TCP/IP kernel setting
on the server and using ideas from 
http://publib.boulder.ibm.com/infocenter/wasinfo/v6r0/index.jsp?topic=/com.ibm.websphere.express.doc/info/exp/ae/tprf_tunesolaris.html
I have used 
ndd -set /dev/tcp tcp_conn_req_max_q 8000 
to increase number of sockets that the server can
handle and this does seem to allow a 1500+ parallel
sockets to exist.

My question is :
What is the standard way to architect web services
which have a very long blocking synchronous operations
?
Assuming I have a small number of clients each making
many WS calls is there a way to somehow multiplex many
SOAP requests for eackh client down one socket?
Is there a way to get Axis/Tomcat server to use UDP/IP
rather than TCP/IP?

I am new to this and all ideas much appreciated.

Cheers,
KP



	
	
		
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Re: Too many sockets being created. Bad architecture?

[Anne Thomas Manes <at...@gmail.com>]

My question is :
What is the standard way to architect web services
which have a very long blocking synchronous operations
?

Don't. Design an asynchronous exchange instead.

Anne

On 8/2/06, kk kk <ki...@yahoo.ie> wrote:
> Hi,
>
> I am developing a WS which provides an operation that
> takes around 25 seconds to complete. I can not speed
> this up nor I can not use a polling pattern or a
> callback to inform the client of the result of the
> request.
>
> I want to make the WS server capable to handle 100 new
> requests per second, so 100 x 25 = 2500 sockets
> connections will exist at any point in time with my
> current design !! I am sure this is bad but am not
> sure what is the best way to go to get a scalable
> solution with a single server process.
>
> I am using Axis 1.2 and Tomcat on the server which is
> a Sun Solaris box. My test client is a Axis/Java
> application though I need to be able to support other
> clients too.
>
> As expected, I can see huge numbers of open sockets
> and FDs using unix commands like netstat and lsof.
>
> I have been experimenting with TCP/IP kernel setting
> on the server and using ideas from
> http://publib.boulder.ibm.com/infocenter/wasinfo/v6r0/index.jsp?topic=/com.ibm.websphere.express.doc/info/exp/ae/tprf_tunesolaris.html
> I have used
> ndd -set /dev/tcp tcp_conn_req_max_q 8000
> to increase number of sockets that the server can
> handle and this does seem to allow a 1500+ parallel
> sockets to exist.
>
> My question is :
> What is the standard way to architect web services
> which have a very long blocking synchronous operations
> ?
> Assuming I have a small number of clients each making
> many WS calls is there a way to somehow multiplex many
> SOAP requests for eackh client down one socket?
> Is there a way to get Axis/Tomcat server to use UDP/IP
> rather than TCP/IP?
>
> I am new to this and all ideas much appreciated.
>
> Cheers,
> KP
>
>
>
>
>
>
> ___________________________________________________________
> All new Yahoo! Mail "The new Interface is stunning in its simplicity and ease of use." - PC Magazine
> http://uk.docs.yahoo.com/nowyoucan.html
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: axis-user-unsubscribe@ws.apache.org
> For additional commands, e-mail: axis-user-help@ws.apache.org
>
>

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