I assume mod_proxy will do a round-robin scheduling of the initial
request. Even if subsequent requests in the same session are tied to the
same appserver, I would think that you should see an even distribution
as each session (on avg) should be placing the same load.
Let's see if Akara has better insights.
Shanti
Harold Lim wrote:
Hi Akara,
Currently, what I have is an apache front-end using mod_proxy as a load
balancer for multiple glassfish servers. In Faban, I just enter the address of
the apache server. It works fine but I have to turn on sticky session. Without
sticky session, it's not allowing the pages to log-in (i think because it's
returning with different glassfish server each time).
The problem I have now is that when I run my benchmark run, the load is not
balanced. It is skewed towards one of the glassfish server (i.e, 1 glassfish
server has 70+% utilization, the other 2 only has 40+%).
I was looking at the UIDriver of Olio and saw that the httpconnection instance is being reused. It only gets "a new fresh state" in the doLogout. But, doLogout is only being called by doLogin() and in doAddPerson().
What is the best way to address this problem? Do I call doLogout() at the end
of each benchmark operation function (i.e, in doTagSearch(), etc)? I feel that
if I do that, it breaks the realism of the simulation/benchmark run.
In Faban, how does it determine or what constitutes a "session". I would think
a session is something like a user going to a website, browsing a couple of the pages
within that site and then leaving. Ideally, what we want is having something like that,
with the leaving part corresponding to calling the doLogout method.
Thanks,
-Harold
--- On Fri, 11/6/09, Akara Sucharitakul <[email protected]> wrote:
From: Akara Sucharitakul <[email protected]>
Subject: Re: Question about Faban/workload driver + multiple Glassfish servers
To: "Harold Lim" <[email protected]>
Date: Friday, November 6, 2009, 4:13 PM
OK, with that version it is probably
harder to achieve what you're
trying to do (go through switches). Check out the new
benchmark class.
-Akara
Harold Lim wrote:
Hi Akara,
Yes. I built my olio package from the Java source (a
few months back).
-Harold
--- On Fri, 11/6/09, Akara Sucharitakul <[email protected]>
wrote:
From: Akara Sucharitakul <[email protected]>
Subject: Re: Question about Faban/workload driver
+ multiple Glassfish servers
To: "Harold Lim" <[email protected]>
Date: Friday, November 6, 2009, 3:11 PM
Sorry, I meant the Olio kit. It is
the Olio benchmarking process that
causes this issue.
-Akara
Harold Lim wrote:
Hi Akara,
I'm using the faban binary you gave me last
September
19 with the load variation fix.
-Harold
--- On Fri, 11/6/09, Akara Sucharitakul <[email protected]>
wrote:
From: Akara Sucharitakul <[email protected]>
Subject: Re: Question about Faban/workload
driver
+ multiple Glassfish servers
To: [email protected]
Date: Friday, November 6, 2009, 2:47 PM
Hmmm, based on previous questions I
thought you were on the latest and
pretty much in-sync with the repository.
Apparently not.
OlioBenchmark.configure no longer makes a
call to
getFile.
This has been
eliminated in favor of the Faban
services/tools
infrastructure we had in
place lately.
Did you build the kit yourself? Or is this
based
on a
released kit. Thanks.
-Akara
Harold Lim wrote:
Hi Akara,
Here is the stack trace:
Logger:
com.sun.faban.harness.engine.GenericBenchmark
Thread Class
Method
11
com.sun.faban.harness.engine.GenericBenchmark
start
Exception:
Message:
com.sun.faban.harness.FabanHostUnknownException:
Host
xxx.xxx.xxx.xxx not found!
Stack Trace:
Class Method
Line
com.sun.faban.harness.engine.CmdService
get
1276
com.sun.faban.harness.RunContext
getFile 346
org.apache.olio.workload.harness.OlioBenchmark
configure
107
com.sun.faban.harness.engine.InterfaceBenchmarkWrapper
configure
56
com.sun.faban.harness.engine.GenericBenchmark
start
264
com.sun.faban.harness.engine.RunDaemon
run
338
java.lang.Thread
run
619
Thanks!
-Harold
--- On Thu, 11/5/09, Akara
Sucharitakul <[email protected]>
wrote:
From: Akara Sucharitakul <[email protected]>
Subject: Re: Question about
Faban/workload
driver
+ multiple Glassfish servers
To: [email protected]
Date: Thursday, November 5, 2009,
4:37 PM
Can you get me the stack trace?
Thanks.
-Akara
Harold Lim wrote:
Hi Akara,
When I set hostConfig/enabled
to
false, I am
getting
FabanUnknownHostException pointing
to the
address
of the
switch. But If I set it to true,
it fails
because
it is not
able to connect to the agent
(which I
don't have)
in the
machine that has the switch.
-Harold
--- On Fri, 10/30/09, Akara
Sucharitakul
<[email protected]>
wrote:
From: Akara Sucharitakul
<[email protected]>
Subject: Re: Question
about
Faban/workload
driver
+ multiple Glassfish servers
To: [email protected]
Date: Friday, October 30,
2009,
7:56 PM
Lets say it has not been
tested
this
way. It certainly cannot
dynamically add
servers
into the
driver. But you can use a
switch
that
allows
dynamic
addition of the servers.
If you
want
stats
collection for
all the servers behind
that
switch, we may
need to
add an
explicit URL field in the
configuration
(which
will default
to the web servers if left
blank.
If
that's not
needed, just
specify the single server
representing the
switch
and set
hostConfig/enabled to
false to
prevent
Faban
starting an
agent there. Thanks.
-Akara
Harold Lim wrote:
Hi,
Does the workload
driver
supports
dynamically
adding a
glassfish server, while a
benchmark test
is
running?
Currently, I specify
all the
glassfish
servers
in the
host:pair field of the web
server
tab.
If not, is there any
way
around it? Do
you
have any
ideas of how to deal with
adding
or
removing
glassfish
servers dynamically?
-Harold
