opensta-users — OpenSTA users discussion and support

Re: [OpenSTA-users] Could openSTA be used for a non HTTP Application

[Dan D. <ddo...@me...>]

Mandeep wrote:

>I am evaluating openSTA, Please answer following query
>My application under test (AUT) does not support
>HTTP/S protocols. 
 >I connect to AUT remotely using SSH protocol through
>XManager,  
>Can openSTA be used for automated load testing of this
>application? 

Mandeep,
Simple answer: no.  OpenSTA support http/s only.

Suggest you try Mercury  LoadRunner with Remote Terminal Emulation or
similar.  Donlt know any open source tools that support RTE.

..Dan
www.mentora.com 

[OpenSTA-users] Could openSTA be used for a non HTTP Application

[mandeepsingh g. <man...@ya...>]

Hi ,

I am evaluating openSTA, Please answer following query
:-

My application under test (AUT) does not support
HTTP/S protocols. 
 I connect to AUT remotely using SSH protocol through
XManager,  
Can openSTA be used for automated load testing of this
application? 

Thanks and Regards, 
Mandeep S Gujral


 
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Re: [OpenSTA-users] CPU usage is showing 100% with 200VUs

[Dev G. <dev...@gm...>]

Thanks for replying Bernie,
If I run script in single step, CPU usage fluctuates between 2-5 %,
In my scripts i am not using Load response_info body or substrings,
I am only using variables and files to send data values in calls.

But now i am running a test (50 Vus, 10 in a batch, 30 secs-Batch ramp
up) with a script, in which i am not using any variable but still its
using 100% CPU, I have noticed as the no of VUs exceed 25, CPU usage
shows 100%,

Still I have not foud any solution, Please suggest if i can try anything else.

Thanks
Dev

On 3/9/07, Bernie Velivis <Ber...@ip...> wrote:
> Dev,
>
> > Now the problem is CPU usage is showing 100%.
> > Please suggest any solution to reduce CPU usage.
>
> The only thing in your control that I can think of that causes high CPU
> utilization is string manipulation in scripts (the kind that you write). If
> you are doing "load response_info body..." into strings and looking for
> substrings or breaking apart strings to get at substrings, then you'll need
> to either make them more efficient, playback from a server with more CPU
> capacity (OpenSTA capacity scales "ok" on SMP servers), or start using
> multiple servers for playback.
>
> Just out of curiosity, what % of the CPU utilization is User mode?
>
> -Bernie
>
>
>
>
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Re: [OpenSTA-users] trouble with the portal

[Stephen K. <Ste...@on...>]

Daniel Sutcliffe wrote:
>
>You should now be able to "Submit News" using your Stevek username.

Thanks Dan, as soon as I get past the cookies thing I'll give it a try.


>> 2) When I try and log in now I'm told I need to enable cookies.  I get
this
>> in Both IE and Firefox, both of which have cookies enabled.  Am I doing
>> something wrong?  Is it all falling apart because it's Friday?
>
>I really don't know what this is - and can't reproduce it myself
>:shrug:
>
>Sorry, I don't have time to give more input,
>Cheers
>/dan

Dan, I still get this from 2 different machines.  I'll try it from home
incase it's something clever our proxy server is doing here in the office.

Thanks for taking time to look at it.
Cheers,
Steve



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Re: [OpenSTA-users] IO Failed for VU 1-1 on connection 0/6 witherror64:(The specified network name

[Bernie V. <Ber...@iP...>]

>> The other time it was related to a network bottleneck
> [snip]
> I think you need say no more here :)

Hi Dan,

The network bottleneck I alluded to occured when trying to emulate 3000 
users over 6 (or so, its been a while) OpenSTA load generators. The load 
generation machines were configured with a single gigabit ethernet 
controllers but the controllers, set to autodetect speed, were only running 
at 100 100Mb. Each OpenSTA server was averaging about 20 Mbit/sec over it's 
single ethernet controller, implying each was running well below its 
theoretical limit. CPU, memory, and disk activity on the OpenSTA servers 
were low enough to not be a factor.

The network topology had a gigabit backbone, but after digging under the 
covers and asking the same question 10 times (I was very curious why they 
had fallen back to 100 Mbit mode), I finally learned that "OH! Thats right, 
all those OpenSTA boxes eventurally go through a single  100 Mbit switch to 
get to their SUTs".

So while each of the servers (load generators and servers under test) were 
each runing at well below 100 Mbit/sec, the sum of the network traffic had 
exceeded the capacity of the 100 Mbit switch burried somewher in the route 
between the OpenSTA servers and the SUTs.

When we were receiving "The specified network name is no longer available" 
errors, it was during a period where one 100 Mbit network switch in the 
route to the SUT was trying to service in excess off 100 Mbit/sec woth of 
traffic sustained over a long period.

-Bernie

Re: [OpenSTA-users] IO Failed for VU 1-1 on connection 0/6 with error64:(The specified network name

[Daniel S. <da...@Op...>]

System Error 64: "The specified network name is no longer available"
Is as the message suggests a "system" error and OpenSTA is just
passing the info - it is unfortunately one of those inconclusive
errors that really just tells you something was exhausted or broke -
in this specific case the 'something' is to do with the network.

Bernie Velivis wrote:
> I have encountered this error under two different situations.  The
> first was when the system under test had two NICs.  In that case,
> disabling one of the NICs cured the problem.

Although there is no bug associated with it, it is known that there
are 'issues' running the load generator on machines with multiple
NICs - I didn't remember that this presented itself as an 'error 64'
though.  Seems a strange way to present itself, but maybe not when
you read the theory below ...

> The other time it was related to a network bottleneck
[snip]
I think you need say no more here :)
I suggest that as we can assume that load testing is being done then
something is being exhausted by your load generator - this might be
a system resource or a network infrastructure resource; I'm afraid
that only the person experiencing this is going to be able to find
out which.  Check your system error logs and maybe try to track some
of the potentially exaustable resources using PerfMon - if you have
a managed switch or router then you may be able to track stuff there
as well.

So, given this, here's my theory on the multiple NIC problem: maybe
having multiple NICs isn't really a problem, maybe it is just that
having more than 1 NIC allows what is ever being exhausted to occur
quicker/easier - just having a single NIC acts as a kindof throttle
to stop things becoming overwhelmed and breaking?  Just an idea.

Related: did recording on the machine with multiple NICs work fine
before you disabled one of them.

Cheers
/dan
-- 
Daniel Sutcliffe <Da...@Op...>
  OpenSTA part-time caretaker - http://OpenSTA.org/

Re: [OpenSTA-users] IO Failed for VU 1-1 on connection 0/6 with error 64:(The specified network name

[Daniel S. <da...@Op...>]

Rajendran Chandrasekaran wrote:
> (also when i tried to download the whole website and put in our lan
> network and checked putting load, for as less as 25 users, i started
> getting error 64 from opensta, so while i was loading from opensta, i
> opened a browser and tried to connect to the localhost site, and it
> gave client error "403.9" response code, too many users accessing,
> but when i test the real production server (webserver has a Proxy
> server enabled),  it does not give response code '403')

My guess as to the cause of this, is that your LAN installed Web
server is IIS on a "Workstation" version of Windows (not "Server").
These IIS installs are limited on the number of connections they
allow.  Check your System error log for messages.

Cheers
/dan
-- 
Daniel Sutcliffe <Da...@Op...>
  OpenSTA part-time caretaker - http://OpenSTA.org/

Re: [OpenSTA-users] Changing OpenSTA Default Timeout

[Daniel S. <da...@Op...>]

Christabel Osoata wrote:
> Can you please tell me how to increase the timeout of OpenSTA, I
> understand it is currently 1 minute.

By reading the FAQ ;)
Olaf even gave you the link to the correct page in the FAQ in the
first reponse to your question that led to this question ...

Cheers
/dan
-- 
Daniel Sutcliffe <Da...@Op...>
  OpenSTA part-time caretaker - http://OpenSTA.org/

Re: [OpenSTA-users] Changing OpenSTA Default Timeout

[Bernie V. <Ber...@iP...>]

> Hi All,
> Can you please tell me how to increase the timeout of OpenSTA, I
> understand it is currently 1 minute.
>

Chris,

I think everyone has been very patient and helpful with your requests here. 
We want you to be successful using OpenSTA. There comes a point however when 
it becomes apparent that you are not trying very hard to find answers for 
yourself. I personally gave you advise on where to read about this on 3/9. 
Try goggling 'opensta timeout' and read the first response. It will point 
you to: 
http://portal.opensta.org/modules.php?op=modload&name=phpWiki&file=index&pagename=PlaybackRequestTimeout

Besides using search engines, please take the time to read the FAQ at 
http://portal.opensta.org/modules.php?op=modload&name=phpWiki&pagename=FrequentlyAskedQuestions&file=index 
and the online doc at http://opensta.org/docs/

If you don't have the time to research this yourself then you should 
consider hiring someone to help accelerate your project.

All the best,
-Bernie
(www.iPerformax.com) 

[OpenSTA-users] Changing OpenSTA Default Timeout

[Osoata, C. <Chr...@at...>]

Hi All,
Can you please tell me how to increase the timeout of OpenSTA, I
understand it is currently 1 minute.

Thanks
Chris


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Re: [OpenSTA-users] IO Failed for VU 1-1 on connection 0/6 with error64:(The specified network name

[Bernie V. <Ber...@iP...>]

> I have been doing performance testing of a website, and when i try 100 
> VU's,
> i get error " IO Failed for VU 1-1 on connection 0/6 with error 64: ( The
> specified network name is no longer available, ).,
>

Rajendran,

I have encountered this error under two different situations. The first was 
when the system under test had two NICs. In that case, disabling one of the 
NICs cured the problem.

The other time it was related to a network bottleneck when running multiple 
OpenSTA boxes trying to emulate upwards of 3,000 virtual users. Each OpenSTA 
box (and the NIC on it) had adequate capacity but the sum of the network 
traffic saturated one of the routers. You really have to dig into the 
network configuration to be sure there is adequate capacity. You might try 
pinging the system under test from the OpenSTA server when the error 64 
occurs to see how the network is responding or if you get a similar error 
outside of OpenSTA.

Please post a reply if you solve this problem as it has been reported here a 
number of times and there is no clear cause or resolution that I am aware 
of.

-Bernie
(www.iPerformax.com)

Re: [OpenSTA-users] IO Failed for VU 1-1 on connection 0/6 with error 64:(The specified network name

[Olaf K. <ok...@ab...>]

Rajendran Chandrasekaran schrieb:
> Hello All,
> 
> I have been doing performance testing of a website, and when i try 100 VU's, 
> i get error " IO Failed for VU 1-1 on connection 0/6 with error 64: ( The 
> specified network name is no longer available, ).,
[...]
> does this error arise when there is more load on the webserver ?
> if so what is the response code it should return,

If there is no connection to the webserver, there will be no HTTP
protocol exchange on the line, thus no response code.

And yes, Error 64 is the Winsock error, promoted directly from the
underlying network api, more documentation about this error code may be
found at Microsofts Windows API documentation (or at google).

> (also when i tried to download the whole website and put in our lan network 
> and checked putting load, for as less as 25 users, i started getting error 
> 64 from opensta, so while i was loading from opensta, i opened a browser and 
> tried to connect to the localhost site, and it gave client error "403.9" 
> response code, too many users accessing, but when i test the real production 
> server (webserver has a Proxy server enabled),  it does not give response 
> code '403')

I'm not aware of any non-integer response codes - e.g. 403.9 to me is
unknown.

I believe "too many users accessing" is a pretty obvious error message.
I suppose, there are too many users that currently access your server.
If it doesn't happen when the server is configured differently, maybe
the configuration makes a difference? Sorry, to me it's not clear, what
you are asking here...

Cheers,
Olaf

Re: [OpenSTA-users] IO Failed for VU 1-1 on connection 0/6 with error 64:(The specified network name

[Dan D. <ddo...@me...>]

Rajendran Wrote:

>I have been doing performance testing of a website, and when i try 100
VU's, 
>i get error " IO Failed for VU 1-1 on connection 0/6 with error 64: ( The 
>specified network name is no longer available, ).,

Rajendran,
My experience and understanding of this error is that it is "load related",
and the moral equivalent of an http error 500 -- even though an error 500
may not actually be received.  Namely, the web server is overwhelmed and is
rejecting connections.  We see these a lot at a certain load ramp point when
the target system starts to get overloaded.

But, I would love to be enlightened further -- especially if I am mistaken
-- by DanS or Olaf or some other opensta guru...

..Dan
www.mentora.com 

[OpenSTA-users] IO Failed for VU 1-1 on connection 0/6 with error 64:(The specified network name

[Rajendran C. <raj...@ho...>]

Hello All,

I have been doing performance testing of a website, and when i try 100 VU's, 
i get error " IO Failed for VU 1-1 on connection 0/6 with error 64: ( The 
specified network name is no longer available, ).,

i have enough memory and network resource on both the client and server 
side.

i researched a lot on this error, also saw a posting on the same issue, but 
no answer,

however i know this is a system error 64, which could occur if any issues on 
the sockets or if the nic card is not able to send and recieve traffic.

does this error arise when there is more load on the webserver ?
if so what is the response code it should return,

Pls help

(also when i tried to download the whole website and put in our lan network 
and checked putting load, for as less as 25 users, i started getting error 
64 from opensta, so while i was loading from opensta, i opened a browser and 
tried to connect to the localhost site, and it gave client error "403.9" 
response code, too many users accessing, but when i test the real production 
server (webserver has a Proxy server enabled),  it does not give response 
code '403')

Thanks
Rajendran c

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Re: [OpenSTA-users] Problem in Uploading a Text File.

[Olaf K. <ok...@ab...>]

sachin singh schrieb:
> Hi,
>  I am working on a scenario in which I have to upload a file. I want
> to parametrize this part. So that I have give only the path of the
> Text File.

Hi,

did you read http://portal.opensta.org/faq.php?topic=HttpFileUpload ?

Cheers,
Olaf

Re: [OpenSTA-users] trouble with the portal

[Daniel S. <da...@Op...>]

Stephen Kay wrote:
> 1)  How do I go about posting an example article?  I wanted to write an
> article about using a database to populate a variable (triggered from a
> discussion over on SQAForums).  I registered but was told I didn't have
> access to add news so I ended up adding a couple of updates to the FAQ
> instead, but it would have been better as an article.

Sorry, the permissions system is kind of screwed up.  This was
partially due to a site software upgrade that went less than smoothly
and partly due me getting fed up with so much time spent dealing with
spam and the site ...

You should now be able to "Submit News" using your Stevek username.
If anyone else really wants to be able to add articles then please
just drop me a mail first and I'll enable your account.

> 2) When I try and log in now I'm told I need to enable cookies.  I get this
> in Both IE and Firefox, both of which have cookies enabled.  Am I doing
> something wrong?  Is it all falling apart because it's Friday?

I really don't know what this is - and can't reproduce it myself
:shrug:

Sorry, I don't have time to give more input,
Cheers
/dan
-- 
Daniel Sutcliffe <Da...@Op...>
  OpenSTA part-time caretaker - http://OpenSTa.org/

[OpenSTA-users] Problem in Uploading a Text File.

[sachin s. <sin...@gm...>]

Hi,
 I am working on a scenario in which I have to upload a file. I want
to parametrize this part. So that I have give only the path of the
Text File.
Regards
Sachin

Re: [OpenSTA-users] Performance testing with Open STA

[Bernie V. <Ber...@iP...>]

<Chris wrote>

> You are right there appears to be a bottleneck somewhere as the system

Monitoring CPU utilization on the servers under test (SUTs)  would be a good 
start. If you have Hyperthreading capable CPUs on the SUT(s), turn HT off 
(it distorts CPU accounting and can cause the OS to under-report CPU 
utilization by 40-50% under most workloads. This can only be done at the 
console at boot time on the servers I am familiar with).

> cannot support 5 or 10 users using the system simultaneously. The
> developers informed me that this is not a ralistic situation as there is
> no way 5 or 10 users will hit the same buttons and perform the same
> function at the same time.

Thats a prettylow number based on what you say in the following paragraph. 
But I have no idea of the system configuration, how demanding the 
transactions are, what if anything is happening on the systems you are 
testing, nor the network bandwidth between the OpenSTA load generator and 
the SUT(s). All these are worth considering and understanding to put the 
"5-10" user limit into context.

> I am currently running a test for 5 virtual users, and ramping up the
> users such that 1 user is added every 30 seconds with a 10 seconds delay
> between batches and the test is run for an hour. The recorded test takes
> about 5 minutes to run (Login, Create order Logout)for a virtual user
> and this emulates the real life situation. The problem im having now is,
> although there are no error in the application's logs, there are time
> out errors in the error log of OpenSTA, the orders appears to be
> correctly created in the database. Could this be OpenSTA timing out, I
> understand there is a timeout of 1 minute used by OpenSTA, will there be
> any effect on my application if this timeout is increased?

As a rule of thumb, I would set my ramp up period to be no less then the 
longest running script, in your case, 5 minutes. I would ignore response 
times during the ramp up and instead watch what happens to response times 
and server resource utilization (disks, network, CPU, memory,...) in the 10 
or 15 minutes following the end of the rampup period.  Also, increase the 
OpenSTA timeout to something large, say 300000 (unites are milliseconds by 
default, so this will give you up 5 minute timeout ) so you can see the true 
response times. Someone earlier on mentioned how to do that. Its a setting 
in an .ini file. Just Google OpenSTA timeout if you can't find it.

-Bernie
(www.iPerformax.com)

Re: [OpenSTA-users] OpenSTA & Jboss

[Flint, K. W <kf...@vf...>]

Thanks for the info Olaf!
I've prepended my responses with [KWF].

Flint, Kent W schrieb:
> I have been using OpenSTA for quite a while now against a web app=20
> running on Weblogic and it's been working great.
> We are now in the process of beginning to convert over to JBoss app=20
> server.
> =20
> We have a Jboss environment up and I'm trying to run my OpenSTA tests=20
> against this JBoss environment and am running into problems.
> The problem I'm up against right now is a POST command to the=20
> server(which is the actual login page) and I'm loading the=20
> Response_Info Header into cookie_7_0, WITH "Set-Cookie,prtcpntId", and

> when OpenSTA is parsing these header contents, it cannot find the
cookie 'prtpcntId'.
> I've also tried just straight loading the Response_Info Header into=20
> cookie_7_0 variable, and logging that to output, and it's empty.
> So I'm wondering why this would work fine with Weblogic, but nothing=20
> in the Response_Info Header for JBoss...

It seems, that while you recorded, the server (whatever brand and
version it was) sent a cookie named prtcpntId and this was recorded into
your script.

When now, at runtime, this cookie is not being sent any more, this is no
problem that OpenSTA has with your server, but a problem that your
script has with your application.

[KWF] - Ah, I see. Will talk to development to see why this cookie might
not be sent anymore in Jboss.

You'll have to look for other cookies that are sent with any request and
need to be re-sent later during 'playback' of your script.

This kind of scripting is kind of annoying, but please keep in mind that
you should know and understand your application well enough to know when
a cookie will be expected to be sent from the server. This all
sacrifices the load-test requirement of using as little processing power
as possible on the client (unless your script explicitly analyses more)
in order to run as many parallel client processes as possible on given
hardware. It'd be a lot easier to load test from 1000 different boxes,
but if you want to simulate 1000 users from 1-5 boxes, you'd better
don't analyse too much of http traffic by default.

> Anybody else run into any problems using OpenSTA with JBoss?
> And/or have any ideas what the problem might be here?
> =20
> Any help will be greatly appreciated!

Regarding your concrete problem: Did you record agains WebLogic and play
back to JBoss? prtpcntId might be a Weblogic cookie (I don't know about
that...)

[KWF] - Yes, I originally recorded my scripts against Weblogic and am
re-playing the same scripts against the same application which is now
running on Jboss. (prtcpntId is actually an application
cookie...although it could be that Weblogic is handling this cookie
differently than Jboss...?)

Cheers,
Olaf

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the author.

Re: [OpenSTA-users] Performance testing with Open STA

[Osoata, C. <Chr...@at...>]

<Chris writes>

Thanks Michael and B
You are right there appears to be a bottleneck somewhere as the system
cannot support 5 or 10 users using the system simultaneously. The
developers informed me that this is not a ralistic situation as there is
no way 5 or 10 users will hit the same buttons and perform the same
function at the same time.

I am currently running a test for 5 virtual users, and ramping up the
users such that 1 user is added every 30 seconds with a 10 seconds delay
between batches and the test is run for an hour. The recorded test takes
about 5 minutes to run (Login, Create order Logout)for a virtual user
and this emulates the real life situation. The problem im having now is,
although there are no error in the application's logs, there are time
out errors in the error log of OpenSTA, the orders appears to be
correctly created in the database. Could this be OpenSTA timing out, I
understand there is a timeout of 1 minute used by OpenSTA, will there be
any effect on my application if this timeout is increased?

Many thanks



> So OpenSTA timing out could be an indication of server application=20
> overloading.  And if the scripts are recorded and modeled correctly,=20
> that could well be the point that Chris is looking for to stop putting

> more load when doing the throughput test.
>
> --Michael

Hi Michael,

I agree as long as the default timeout is appropriate given how long the
transaction runs for a single user. I am testing an application right
now that does complex delivery scheduling for a package delivery service
where some transactions take 3 minutes when no one else is using the
system! Given the work that is being done, it is completely reasonable.
Forget usability factors, it is what it is and the users are thankful
the task is automated.=20
If I used a default timeout of 1 minute, an OpenSTA error would not
indicate a server problem. This is an extreme example, but I don't have
any idea what Chris is modeling, so I'm pointing it out.

Next, I don't know how close Chris' scripts emulate "reality".
Determining that the system supports 10 VUs tells me absolutely nothing
about it's capacity unless I know how a VUs work compares to "real life"
users. IF a VU is a reasonable approximation of a real user and the
system under test begins to timeout at 10 VUs, then it is appropriate to
say that the system has a severe bottleneck at 10 users. I suspect in
this case, performance at
9 users was also bad. To determine a limit meaningful for capacity
planning, you need to have emulate virtual users in a realistic way and
judge capacity limits by looking at how response times, throughput, and
server resources vary as load changes.

-B

=20





This email and any attached files are confidential and copyright protected.=
 If you are not the addressee, any dissemination of this communication is s=
trictly prohibited. Unless otherwise expressly agreed in writing, nothing s=
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The ultimate parent company of the Atkins Group is WS Atkins plc.  Register=
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Consider the environment. Please don't print this e-mail unless you really =
need to.=20

Re: [OpenSTA-users] trouble with the portal

[Olaf K. <ok...@ab...>]

Olaf Kock schrieb:

> I believe, you've done everything correctly - somehow it must be the
> friday-effect. Thanks for mentioning that here. Usually you should be
> able to register and post news, I've just had problems registering an
> account or receiving mail containing the password. Please stand by...
> it'll get better soon...

Well, so much for that. My own stupidity prevented registering with a
deactivated email account. These tenacious mail servers strictly won't
accept mail for accounts, that I deactivated some months ago ;-)

On the other hand, there *are* configuration issues with the server,
that need to be worked on. Please stay calm...

(There's no real news here apart from my own stupidity, but I wanted to
let you know that I have been the first cause of my own troubles. Now
that I'm out of the way, the real causes might be worked on).

Cheers,

Olaf

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Re: [OpenSTA-users] trouble with the portal

[Olaf K. <ok...@ab...>]

Stephen Kay schrieb:
> Hello,
> My first OpenSTA question and I've got 2 questions about the portal and one
> about OpenSTA.
> 
> 1)  How do I go about posting an example article?  I wanted to write an
> article about using a database to populate a variable (triggered from a
> discussion over on SQAForums).  I registered but was told I didn't have
> access to add news so I ended up adding a couple of updates to the FAQ
> instead, but it would have been better as an article.
> 
> 2) When I try and log in now I'm told I need to enable cookies.  I get this
> in Both IE and Firefox, both of which have cookies enabled.  Am I doing
> something wrong?  Is it all falling apart because it's Friday?

Hi Stephen,

I believe, you've done everything correctly - somehow it must be the
friday-effect. Thanks for mentioning that here. Usually you should be
able to register and post news, I've just had problems registering an
account or receiving mail containing the password. Please stand by...
it'll get better soon...

> 3) I have some SVG content that I'm trying to interrogate.  We have some
> scripting in the SVG that triggers an HTTP request for a map, but I need to
> interrogate the first SVG response to get the ID of the map to be used in
> the next request.
> 
> The server header says the content is "image/svg+xml" and if I request the
> SVG using a little vbscript and xmlhttp, I can see that the response is in
> XML.  However, OpenSTA obviously does something clever because if I try to
> log the response I get 2 unprintable characters.
> 
> Does anyone know how to interrogate an SVG response?

Not sure about that. You mean there's 2 unprintable characters instead
of the complete SVG-XML text? I've can't remember to have experienced
that. But then, I usually stopped at analysing and logging HTML...

How about extracting a short string from the response and logging this
(for a start, in order to debug some more)?

Cheers,
Olaf

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Re: [OpenSTA-users] Performance testing with Open STA

[Olaf K. <ok...@ab...>]

Bernie Velivis schrieb:
> Thanks for the compliment Olaf. Coming from you, that means a lot.

<blush>Now its my turn to thank for the compliment</blush>

> I think that in some cases I have used far too few words, like referring to 
> the first type of testing as "capacity planning" which is much more then 
> testing. More accurately, I should have referred it as capacity testing 
> which can be part of capacity planning. There are other cases where capacity 
> planning is just monitoring load and extrapolating what additional hardware 
> would be required to stay ahead of  increased demand using complex modeling 
> tools, spreadsheets, and Ouija boards.

Well, I read it as a starting point to make the reader think about what
s/he wants to achieve - not as encyclopedic reference... Even if I did
so, I believe I'd been happy with it.

I also like Michaels point about "don't ask me how many concurrent users
the system can support without defining what a concurrent user is.".
Certainly this is easily understood as an insult (by the one that asked
the question) but it summarizes what you dissected as different testing
purposes.

As this thread carries the generic name "Performance testing with
OpenSTA" you provided a foundation vocabulary to refer to in later posts
on this list. Hopefully questions get more information about their
circumstances with this vocabulary.

> I'll try and clean it up so that, if taken literally, does more
> good then harm and then submit it under testing strategies as
> you requested.

Great - thanks.

Olaf

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[OpenSTA-users] trouble with the portal

[Stephen K. <Ste...@on...>]

Hello,
My first OpenSTA question and I've got 2 questions about the portal and one
about OpenSTA.

1)  How do I go about posting an example article?  I wanted to write an
article about using a database to populate a variable (triggered from a
discussion over on SQAForums).  I registered but was told I didn't have
access to add news so I ended up adding a couple of updates to the FAQ
instead, but it would have been better as an article.

2) When I try and log in now I'm told I need to enable cookies.  I get this
in Both IE and Firefox, both of which have cookies enabled.  Am I doing
something wrong?  Is it all falling apart because it's Friday?

3) I have some SVG content that I'm trying to interrogate.  We have some
scripting in the SVG that triggers an HTTP request for a map, but I need to
interrogate the first SVG response to get the ID of the map to be used in
the next request.

The server header says the content is "image/svg+xml" and if I request the
SVG using a little vbscript and xmlhttp, I can see that the response is in
XML.  However, OpenSTA obviously does something clever because if I try to
log the response I get 2 unprintable characters.

Does anyone know how to interrogate an SVG response?

Thanks in advance.

Stephen Kay
http://www.kentestman.com




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Re: [OpenSTA-users] Performance testing with Open STA

[Olaf K. <ok...@ab...>]

Osoata, Christabel schrieb:

> Hi Olaf,
> I'm a bit confussed now actually, does this mean that it's OoenSTA that
> is timing out and not the application under test? as in the error log
> there are loads of 'The wait operation timed out error messages' and
> Timeout generated for Socket )x360 error messages.

I've more or less given an example about the mechanics of http. Maybe
I've misled you by phrasing the example this way. On the other hand you
are right: If OpenSTA times out waiting for a response, that does not
mean, that the action caused by the request does not happen - e.g. an
order might be placed even though the client chooses not to wait any
longer for the result. Compare this with ordering at a restaurant: Place
an order and wait. If you wait long enough and then leave the
restaurant, you can't tell if your meal will be delivered when you're
gone - maybe it will, maybe it wont. The same applies to http
requests/responses.

Have you tried Bernies reference to
http://www.google.com/search?q=opensta+timeout and read a few of the
articles?

Cheers,
Olaf

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