gridsim-users — For general queries and feedbacks

Re: [GridSim-users] Gridlet input transfer to a grid resource

[Leonardo de A. <leo...@gm...>]

Hello again,

Can I create a new Link class that simulate this behavior? Or it is better
to create a new Machine class that warns the application that the input
transfer of a Gridlet finished?

Thanks

[]'s
Leonardo

On Sun, Aug 24, 2008 at 10:31 AM, Anthony Sulistio <
an...@cs...> wrote:

>
>  Is it possible to know when the input transfer of a Gridlet is finished?
>>
>
> you can roughly estimate the transfer time, by checking the current
> network condition using GridSimCore#ping() and
> compare it with the file size to be transferred.
>
> anthony
>



-- 
Leonardo de Assis
Computação - UFCG
leo...@gm...

[GridSim-users] Working with Gridsim tool reg

[Jeyarani R. <sym...@gm...>]

hai all,
 We are working in gridsim toolkit. We have problems with working on Example
8. We would like to know the definition of send() and receive() method

Two more questions...
1. How jobs from different users are submitted to same resource
    when the following constraints are included?
        - User's policy may differ
        - Multiple Brokers submitting multiple jobs to the same resorce may
compete with each other to complete their own job first. Whose job will be
done first? How the problem is resolved?

[GridSim-users] some questions

[Andrey N. <ne...@ma...>]

Hello, Anthony!
I have some questions about GridSim.

I've tried to make some test about files transfer  in GridSim. I've 
created two resources, 3 routers between (one direct link and one link 
through third router ), and one user on one of resource. Files were on 
one resource. User try to replicate files from Res_1 to res_2.
Config:

3
Router1
Router2
Router3
Router1 Router2 0.10 10.0 1500
Router1 Router3 1.2 10.0 1500
Router2 Router3 1.2 10.0 1500

Res1 25000 0.1 Router1 regionalRC1 File_name_0 File_name_1 File_name_2 
File_name_3 File_name_4 File_name_5 File_name_6 File_name_7 File_name_8 
File_name_9 Res2 20000 0.1 Router2 regionalRC1

user__Res1 Router1 regionalRC1
regionalRC1 0.10 Router1



Questions:
1. Is the any algorithm in GridSim to chose the "best" network way? 
because in my case simulator use only direct link Router1-Router2 
(100Mb/s) and not Router1-Router3-Router2 (1.2Gb/s).
2. Is the any relations between resources characteristic and file 
transfer time? Or file transfer time just depend on size of file and 
bandwidth?
3.  When I've tried to send 100Mb files through network with a different 
bandwidth (10Mb/s, 100Mb/s, 1000Mb/s) I always received the same time - 
something about 669. Why it is?
But when  I've tried to use the same bandwidth (100Mb/s) for different 
files (10Mb, 100Mb, 1000Mb),
i received the next time: 69.8; 669.8; 6669.8. And for transfer one file 
1000Mb I have to wait half an hour, it's to long can it be faster?!
As you said we couldn't have any correlation of this simulation time 
with the real, for example, we've got 6669.8 and it does not mean that 
real file would be transfered in 10 minutes. But what this time mean? 
just that something happened in this time?


Thanks in advance,  I hope you have time to answering me

Best regards, Andrey

Re: [GridSim-users] java errors

[Anthony S. <an...@cs...>]

show us the whole command line syntax and error.
it's hard to tell what's wrong.
my guess is you haven't set the gridsim or classpath properly.
set the classpath and try again.

have you followed the instruction in readme file closely?
To compile the example source code:
     In Unix/Linux: javac -classpath $GRIDSIM/jars/gridsim.jar:. Example1.java
     In Windows:    javac -classpath %GRIDSIM%\jars\gridsim.jar;. Example1.java

where $GRIDSIM or %GRIDSIM% is the location of the gridsimtoolkit package.


To run the class file:
     In Unix/Linux: java -classpath $GRIDSIM/jars/gridsim.jar:. Example1
     In Windows:    java -classpath %GRIDSIM%\jars\gridsim.jar;. Example1

anthony


On Sun, 24 Aug 2008, shyam kumar wrote:

> while compiling example1 i get the following errors
>    example1 uses unchecked or unsafe mode operations
> recompile with Xlint:unchecked for details
>  
> while running i get the following error
>  
> exception in thread main:no classdefinition found.
>  
> kindly help me..

Re: [GridSim-users] some questions

[Anthony S. <an...@cs...>]

Questions:
>1. Is the any algorithm in GridSim to chose the "best" network way? 
>because in my case simulator use only direct link
>Router1-Router2 (100Mb/s) and not Router1-Router3-Router2 (1.2Gb/s).

In FloodingRouter.java and RIPRouter.java description:
"In case there are more than two routes to a destination, the route with 
the lower hopcount is used."
You can add a new router that finds the biggest pipe instead.

>2. Is the any relations between resources characteristic and file
>transfer time? Or file transfer time just depend on
>size of file and bandwidth?

file transfer time just depend on size of file and bandwidth.

>3.  When I've tried to send 100Mb files through network with a different 
>bandwidth (10Mb/s, 100Mb/s, 1000Mb/s) I always
>received the same time - something about 669. Why it is?

I don't know. Perhaps the router finds the shortest route
which may have the bottleneck/small pipe.


>But when  I've tried to use the same bandwidth (100Mb/s) for different 
>files (10Mb, 100Mb, 1000Mb),
>i received the next time: 69.8; 669.8; 6669.8. And for transfer one file 
>1000Mb I have to wait half an hour, it's to
>long can it be faster?!

the half an hour simulation time is due to overheads of creating
many Java objects for network packets, scheduling them,
and synchronization of threads.
This time refers to simulation/experiment runtime.
It has nothing to do with GridSim.clock().

A large object is partitioned into packets
according to MTU. Hence, num packets = object size / MTU.
In GridSim, we set Link#DEFAULT_MTU = 1500.

That's why for datagrid, my colleague, James, has come up with
the flow network simulation that aims to make the simulation
runs faster.

I have integrated his work to the main trunk.
It is available on
http://gridsim.svn.sourceforge.net/viewvc/gridsim/trunk/

You can help us with testing this functionality.
It is not yet ready for release.


anthony


> I have some questions about GridSim.
>
> I've tried to make some test about files transfer  in GridSim. I've created 
> two resources, 3 routers between (one direct link and one link through third 
> router ), and one user on one of resource. Files were on one resource. User 
> try to replicate files from Res_1 to res_2.
> Config:
>
> 3
> Router1
> Router2
> Router3
> Router1 Router2 0.10 10.0 1500
> Router1 Router3 1.2 10.0 1500
> Router2 Router3 1.2 10.0 1500
>
> Res1 25000 0.1 Router1 regionalRC1 File_name_0 File_name_1 File_name_2 
> File_name_3 File_name_4 File_name_5 File_name_6 File_name_7 File_name_8 
> File_name_9 Res2 20000 0.1 Router2 regionalRC1
>
> user__Res1 Router1 regionalRC1 
> regionalRC1 0.10 Router1
>
>
>
> Questions:
> 1. Is the any algorithm in GridSim to chose the "best" network way? because 
> in my case simulator use only direct link Router1-Router2 (100Mb/s) and not 
> Router1-Router3-Router2 (1.2Gb/s).
> 2. Is the any relations between resources characteristic and file transfer 
> time? Or file transfer time just depend on size of file and bandwidth?
> 3.  When I've tried to send 100Mb files through network with a different 
> bandwidth (10Mb/s, 100Mb/s, 1000Mb/s) I always received the same time - 
> something about 669. Why it is?
> But when  I've tried to use the same bandwidth (100Mb/s) for different files 
> (10Mb, 100Mb, 1000Mb),
> i received the next time: 69.8; 669.8; 6669.8. And for transfer one file 
> 1000Mb I have to wait half an hour, it's to long can it be faster?!
> As you said we couldn't have any correlation of this simulation time with the 
> real, for example, we've got 6669.8 and it does not mean that real file would 
> be transfered in 10 minutes. But what this time mean? just that something 
> happened in this time?
>
>
> Thanks in advance,  I hope you have time to answering me
>
> Best regards, Andrey
>

Re: [GridSim-users] Gridlet input transfer to a grid resource

[Anthony S. <an...@cs...>]

> Is it possible to know when the input transfer of a Gridlet is finished?

you can roughly estimate the transfer time, by checking the current
network condition using GridSimCore#ping() and
compare it with the file size to be transferred.

anthony

Re: [GridSim-users] Getting the amount of computation executed so far

[Anthony S. <an...@cs...>]

Hi Vinicius,

> So, I made two simple tests submitting a gridlet. First I submited it to a
> GridResource. In the second I submitted it to a GridResource and after
> holding for 100 secs I moved to another GridResource with the same
> characteristics (one machine with one PE). The result is that the execution
> seems to start from the beggining, ignoring the amount executed so far.
> Bellow are the gridlet history for the two executions. So, do you know a
> wise way to resume the gridlet execution from the point where it stopped?

I thought in the 2nd scenario, it shows clearly:


0,00 Creates Gridlet ID #0
0,00 Assigns the Gridlet to Try (ID #13)
8,28 Allocates this Gridlet to Resource_0 (ID #5) with cost = $0.0/sec
...
109,32   Sets the length's finished so far to 202080.0
109,40   Moves Gridlet from Resource_0 (ID #5) to Resource_1 (ID #9) with cost = $0.0/sec
...
Gridlet #0, length = 480000.0, finished so far = 480000.0


So, I am not sure what the problem is.

anthony

[GridSim-users] java errors

[shyam k. <shy...@ya...>]

while compiling example1 i get the following errors 
   example1 uses unchecked or unsafe mode operations
recompile with Xlint:unchecked for details 
 
while running i get the following error
 
exception in thread main:no classdefinition found.
 
kindly help me..


      Unlimited freedom, unlimited storage. Get it now, on http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/

[GridSim-users] query

[shyam k. <shy...@ya...>]

while compiling i receiver an error "import gridsim.*  package doesnot exists.please help me..


      Unlimited freedom, unlimited storage. Get it now, on http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/

[GridSim-users] Load calculation and PE ratings

[Azin M. <az...@ma...>]

Hi all,

I am trying to run a scheduler simulation with GridSim.
There is a default function for calculation of the load of a resource 
in AllocPolicy class. However, this calculation does not take into 
account that the PEs have different ratings but i guess this ratings 
have effect on load calculation...am I right ?

How can I do the calculation taking into account the rating of PEs ?

Best Reards,
Azin

[GridSim-users] Gridlet input transfer to a grid resource

[Leonardo de A. <leo...@gm...>]

Hi,

Is it possible to know when the input transfer of a Gridlet is finished?

thanks.

[]'s

-- 
Leonardo de Assis
Computação - UFCG
leo...@gm...

Re: [GridSim-users] Getting the amount of computation executed so far

[Vinicius P. <vin...@gm...>]

Hi Anthony,

So, I made two simple tests submitting a gridlet. First I submited it to a
GridResource. In the second I submitted it to a GridResource and after
holding for 100 secs I moved to another GridResource with the same
characteristics (one machine with one PE). The result is that the execution
seems to start from the beggining, ignoring the amount executed so far.
Bellow are the gridlet history for the two executions. So, do you know a
wise way to resume the gridlet execution from the point where it stopped?

Regards,

Vinicius

========== OUTPUT ==========
Gridlet ID    STATUS    Resource ID    Cost
    0        SUCCESS        5        0.0
Time below denotes the simulation time.
Time (sec)       Description Gridlet #0
------------------------------------------
0,00   Creates Gridlet ID #0
0,00   Assigns the Gridlet to Try (ID #13)
8,28   Allocates this Gridlet to Resource_0 (ID #5) with cost = $0.0/sec
8,28   Sets the submission time to 8,28
8,28   Sets Gridlet status from Created to InExec
8,28   Sets the execution start time to 8,28
248,28   Sets Gridlet status from InExec to Success
248,28   Sets the wall clock time to 240,00 and the actual CPU time to
240,00
248,28   Sets the length's finished so far to 480000.0
Gridlet #0, length = 480000.0, finished so far = 480000.0
===========================================


========== OUTPUT ==========
Gridlet ID    STATUS    Resource ID    Cost
    0        SUCCESS        9        0.0
Time below denotes the simulation time.
Time (sec)       Description Gridlet #0
------------------------------------------
0,00   Creates Gridlet ID #0
0,00   Assigns the Gridlet to Try (ID #13)
8,28   Allocates this Gridlet to Resource_0 (ID #5) with cost = $0.0/sec
8,28   Sets the submission time to 8,28
8,28   Sets Gridlet status from Created to InExec
8,28   Sets the execution start time to 8,28
109,32   Sets Gridlet status from InExec to Canceled
109,32   Sets the wall clock time to 101,04 and the actual CPU time to
101,04
109,32   Sets the length's finished so far to 202080.0
109,40   Moves Gridlet from Resource_0 (ID #5) to Resource_1 (ID #9) with
cost = $0.0/sec
109,40   Sets the submission time to 109,40
109,40   Sets Gridlet status from Canceled to InExec
109,40   Sets the execution start time to 109,40
350,40   Sets Gridlet status from InExec to Success
350,40   Sets the wall clock time to 241,00 and the actual CPU time to
241,00
350,40   Sets the length's finished so far to 480000.0
Gridlet #0, length = 480000.0, finished so far = 480000.0
===========================================


2008/8/18 Anthony Sulistio <an...@cs...>

>
> I think it resume its execution from the point where it stopped.
> However, pls double check on this one for me.
>
> anthony
>
>
>
> On Mon, 18 Aug 2008, Vinicius Pinheiro wrote:
>
>  Hi Anthony,
>>
>> Thank you! It really worked for me now. But I have one more question: when
>> the gridlet is moved to another grid resource it resume its execution from
>> begining or from the point where it stopped? I did some tests because I'm
>> trying to simulate a checkpoint mechanism and I need to know this for
>> sure.
>>
>> Thanks
>>
>> Vinicius
>>
>>
>> 2008/8/18 Anthony Sulistio <an...@cs...>
>>
>>
>>> Hello,
>>>
>>> The resource scheduler i.e. SpaceShared or TimeShared
>>> will update the gridlet length or call
>>> Gridlet#setGridletFinishedSoFar() method,
>>> according the following conditions:
>>> - the gridlet is finished executing
>>> - the gridlet is cancelled
>>> - the gridlet is migrated to another resource
>>>
>>> The reason is GridSim is a discrete-event simulation, hence, the
>>> simulation
>>> time is not continuous, e.g. time = 1, 2, 3, 4, ...
>>> Instead, the time jumps based on the arrival of new events,
>>> e.g. simulation time = 0, 40, 100, 700, ...
>>>
>>>
>>> Thus, the best way to check the status of a gridlet is by using
>>> the GridSim#gridletStatus() method.
>>> This method returns the current Gridlet status or -1 if not found.
>>> The various Gridlet status can be found in Gridlet class.
>>> Note that you should only call this method at a certain interval,
>>> not in a loop, since it will slow down the simulation.
>>> In addition, the gridlet length will still be zero, until
>>> one of the 3 conditions is satisfied.
>>>
>>>
>>>
>>> anthony
>>>
>>>
>>>
>>> On Wed, 13 Aug 2008, Vinicius Pinheiro wrote:
>>>
>>>  Hi,
>>>
>>>>
>>>> I'm having problems in getting the amount of computation executed so
>>>> far.
>>>> The method Gridlet.getGridletFinishedSoFar() always return 0. Just when
>>>> the
>>>> Gridlet has finished is that it returns the size of the gridlet, what is
>>>> useless at this point.
>>>> My code something like:
>>>>
>>>> while(gridletNotFinished()) {
>>>>  double amount = gridlet.getGridletFinishedSoFar();
>>>>  System.out.println("FinishedSofar: " + amount);
>>>> }
>>>>
>>>> Is there something there I have to do in order to get this method
>>>> working
>>>> properly?
>>>>
>>>> Thanks in advance,
>>>>
>>>> Vinicius Pinheiro
>>>>
>>>>
>>>>
>>

Re: [GridSim-users] Getting the amount of computation executed so far

[Anthony S. <an...@cs...>]

I think it resume its execution from the point where it stopped.
However, pls double check on this one for me.

anthony


On Mon, 18 Aug 2008, Vinicius Pinheiro wrote:

> Hi Anthony,
>
> Thank you! It really worked for me now. But I have one more question: when
> the gridlet is moved to another grid resource it resume its execution from
> begining or from the point where it stopped? I did some tests because I'm
> trying to simulate a checkpoint mechanism and I need to know this for sure.
>
> Thanks
>
> Vinicius
>
>
> 2008/8/18 Anthony Sulistio <an...@cs...>
>
>>
>> Hello,
>>
>> The resource scheduler i.e. SpaceShared or TimeShared
>> will update the gridlet length or call
>> Gridlet#setGridletFinishedSoFar() method,
>> according the following conditions:
>> - the gridlet is finished executing
>> - the gridlet is cancelled
>> - the gridlet is migrated to another resource
>>
>> The reason is GridSim is a discrete-event simulation, hence, the simulation
>> time is not continuous, e.g. time = 1, 2, 3, 4, ...
>> Instead, the time jumps based on the arrival of new events,
>> e.g. simulation time = 0, 40, 100, 700, ...
>>
>>
>> Thus, the best way to check the status of a gridlet is by using
>> the GridSim#gridletStatus() method.
>> This method returns the current Gridlet status or -1 if not found.
>> The various Gridlet status can be found in Gridlet class.
>> Note that you should only call this method at a certain interval,
>> not in a loop, since it will slow down the simulation.
>> In addition, the gridlet length will still be zero, until
>> one of the 3 conditions is satisfied.
>>
>>
>>
>> anthony
>>
>>
>>
>> On Wed, 13 Aug 2008, Vinicius Pinheiro wrote:
>>
>>  Hi,
>>>
>>> I'm having problems in getting the amount of computation executed so far.
>>> The method Gridlet.getGridletFinishedSoFar() always return 0. Just when
>>> the
>>> Gridlet has finished is that it returns the size of the gridlet, what is
>>> useless at this point.
>>> My code something like:
>>>
>>> while(gridletNotFinished()) {
>>>   double amount = gridlet.getGridletFinishedSoFar();
>>>   System.out.println("FinishedSofar: " + amount);
>>> }
>>>
>>> Is there something there I have to do in order to get this method working
>>> properly?
>>>
>>> Thanks in advance,
>>>
>>> Vinicius Pinheiro
>>>
>>>
>

Re: [GridSim-users] simulation time

[Anthony S. <an...@cs...>]

GridSim.clock() is in second (default unit).
It is not real time, instead it is a DISCRETE time.
The GridSim time jumps based on the arrival of new events,
e.g. simulation time = 0, 40, 100, 700, ...
As an anology, the time is similar to a train/bus timetable
on a particular station/stop.

For example, you run a GridSim experiment.
The clock time in your PC says Tuesday, 19 Aug 2008, 11:00
When simulation starts, GridSim.clock() = 0.
When GridSim.clock() shows 1000, it means
that at time 1000, a new event is happening
in the experiment.

It has nothing to do with the actual CPU time.
Your experiment might finish 2 minutes later at
Tuesday, 19 Aug 2008, 11:02.

anthony


On Mon, 18 Aug 2008, Andrey NECHAEVSKIY wrote:

> Hello all,
> I have a question about simulation time.
> GridSim.clock() - in milliseconds? and how this time of simulation
> correlate with real time, for example GridSim.clock shows 1000 - what
> does it mean?  What it is in real?
> Thanks in advance.
>
> best regards, Andrey
>
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[GridSim-users] simulation time

[Andrey N. <ne...@ma...>]

Hello all,
I have a question about simulation time.
GridSim.clock() - in milliseconds? and how this time of simulation 
correlate with real time, for example GridSim.clock shows 1000 - what 
does it mean?  What it is in real?
Thanks in advance.

best regards, Andrey

Re: [GridSim-users] Help regarding Example 8

[Anthony S. <an...@cs...>]

The communication between GridSim entities is done through sending
a message or event. To know how to response to an incoming event
or what each event wants, each event has a specific tag name.
These tag names are defined in GridSimTags.java (majority of them).
These are the basic principals of GridSim or SimJava.

Example8 shows how you can create a new resource scheduler without
worrying the low-level details, i.e. receiving/sending events.
Thus, a skeleton is provided so that you only concentrate on
implementing these abstract methods to make a new scheduler.

In Example8, the Example8 class sends jobs to a resource.
The resource scheduler is happened to be a NewPolicy object.
Thus, the incoming events, or more specifically, jobs/gridlets
are arriving in the gridletSubmit() function.

Follow the sequence of this example:
http://www.gridbus.org/gridsim/example/Example08/output.txt


anthony



On Sat, 16 Aug 2008, Anish Khanna wrote:

> Hi all,
>
> I came across a class file Example 8 from
> http://www.gridbus.org/gridsim/example/Example08/Example8.java,
>
> While tracing this program using NetBeans IDE, I found that the line
> success = gridletSubmit(gridlet, resourceID[id], 0.0, true);
>
> Takes the program execution to another file NewAllocPolicy.java which is
> another class file in the project.. and calls the gridletSubmit ( ) function
> in there instead of the function in *EXAMPLE8 CLASS* !!!
>
> I am not able to understand if this happens due to interleaving of multiple
> threads..
>
> I am not sure of how articulate I have been in this mail.. But I am sure
> you'd have faced a similar situation had you worked wit Example8..
> I am a tyro to GRIDSIM and NetBeans so excuse me if my doubt is very silly
> :)
>
> Any kinda help regarding this will be appreciated..
> Thanks,
> Anish
>

Re: [GridSim-users] Getting the amount of computation executed so far

[Anthony S. <an...@cs...>]

Hello,

The resource scheduler i.e. SpaceShared or TimeShared
will update the gridlet length or call
Gridlet#setGridletFinishedSoFar() method,
according the following conditions:
- the gridlet is finished executing
- the gridlet is cancelled
- the gridlet is migrated to another resource

The reason is GridSim is a discrete-event simulation, hence, the 
simulation time is not continuous, e.g. time = 1, 2, 3, 4, ...
Instead, the time jumps based on the arrival of new events,
e.g. simulation time = 0, 40, 100, 700, ...


Thus, the best way to check the status of a gridlet is by using
the GridSim#gridletStatus() method.
This method returns the current Gridlet status or -1 if not found.
The various Gridlet status can be found in Gridlet class.
Note that you should only call this method at a certain interval,
not in a loop, since it will slow down the simulation.
In addition, the gridlet length will still be zero, until
one of the 3 conditions is satisfied.



anthony


On Wed, 13 Aug 2008, Vinicius Pinheiro wrote:

> Hi,
>
> I'm having problems in getting the amount of computation executed so far.
> The method Gridlet.getGridletFinishedSoFar() always return 0. Just when the
> Gridlet has finished is that it returns the size of the gridlet, what is
> useless at this point.
> My code something like:
>
> while(gridletNotFinished()) {
>    double amount = gridlet.getGridletFinishedSoFar();
>    System.out.println("FinishedSofar: " + amount);
> }
>
> Is there something there I have to do in order to get this method working
> properly?
>
> Thanks in advance,
>
> Vinicius Pinheiro
>

Re: [GridSim-users] Executing gridlets that use multiple PEs

[Anthony S. <an...@cs...>]

> After looking around some (e.g,
> https://smarty.isi.edu/svn/repo1/CloudCleanupSimulator/trunk/gridsimtoolkit-4.0/source/gridsim/TimeShared.java),
> it looks like multi-PE execution is not supported in GridSim, so I'm
> wondering if there are any workarounds, implementation suggestions, or
> recent patches that implement this functionality?

you can have a look at the GridSim branches for a parallel version
of SpaceShared.
http://gridsim.svn.sourceforge.net/viewvc/gridsim/branches/

Alternatively, you can modify the existing SpaceShared.java as
the starting point and make it to support multiple PEs.

anthony

[GridSim-users] Help regarding Example 8

[Anish K. <ani...@gm...>]

Hi all,

I came across a class file Example 8 from
http://www.gridbus.org/gridsim/example/Example08/Example8.java,

While tracing this program using NetBeans IDE, I found that the line
success = gridletSubmit(gridlet, resourceID[id], 0.0, true);

Takes the program execution to another file NewAllocPolicy.java which is
another class file in the project.. and calls the gridletSubmit ( ) function
in there instead of the function in *EXAMPLE8 CLASS* !!!

I am not able to understand if this happens due to interleaving of multiple
threads..

I am not sure of how articulate I have been in this mail.. But I am sure
you'd have faced a similar situation had you worked wit Example8..
I am a tyro to GRIDSIM and NetBeans so excuse me if my doubt is very silly
:)

Any kinda help regarding this will be appreciated..
Thanks,
Anish

[GridSim-users] Getting the amount of computation executed so far

[Vinicius P. <vin...@gm...>]

Hi,

I'm having problems in getting the amount of computation executed so far.
The method Gridlet.getGridletFinishedSoFar() always return 0. Just when the
Gridlet has finished is that it returns the size of the gridlet, what is
useless at this point.
My code something like:

while(gridletNotFinished()) {
    double amount = gridlet.getGridletFinishedSoFar();
    System.out.println("FinishedSofar: " + amount);
}

Is there something there I have to do in order to get this method working
properly?

Thanks in advance,

Vinicius Pinheiro

[GridSim-users] Executing gridlets that use multiple PEs

[Enis A. <af...@ua...>]

Hello,
I'm running into some trouble with executing gridlets that have numPEs set
to a value greater than 1. When creating a gridlet, I set the number of PEs
for it to use, but once executed the numPEs is reset to 1 and the following
message appears in the stdout:
Gridlet #0 from SimEx user requires 3 PEs.
--> Process this Gridlet to 1 PE only.

After looking around some (e.g,
https://smarty.isi.edu/svn/repo1/CloudCleanupSimulator/trunk/gridsimtoolkit-4.0/source/gridsim/TimeShared.java),
it looks like multi-PE execution is not supported in GridSim, so I'm
wondering if there are any workarounds, implementation suggestions, or
recent patches that implement this functionality?

Thanks,
Enis

[GridSim-users] (no subject)

[Jeyarani R. <sym...@gm...>]

email: sym...@gm...

Re: [GridSim-users] Help!

[Marcos D. de A. <ma...@cs...>]

Hi Mehtab,

I am sorry for the delay.

I guess you want to specify a maximum period of time over which  
participants will send asks and bids. After that time, the auctioneer  
will clear the auction. To do that, you don't set this time at the  
auctioneer, but at the auction.

You set this time in the constructor. For example:

/**
  * Default constructor
  * @param auctionName A name for the auction
  * @param auctionProtocol the auction protocol
  * @param durationOfAuction duration of the auction in simulation time
  * @throws Exception
  */
public DoubleAuction(String auctionName,
	int auctionProtocol, double durationOfAuction)throws Exception {
	super(auctionName, auctionProtocol);
	this.durationOfAuction = durationOfAuction;
}

One event will be scheduled to be received by the Auction entity  
after the duration provided. When that event is received, the  
DoubleAuction, for example, calls the closeAuction() method.

You can extend DoubleAuction and implement the closeAuction() method  
that suits you. I am attaching an example of double auction that only  
receives asks and bids, puts them in lists and implements the  
closeAuction() method. It does nothing at the moment, but you can see  
where your code should be inserted.

Please let me know if you face any other problem.

Regards,

Marcos


On 15/07/2008, at 5:45 PM, Mehtab Arif wrote:

> Hi, Marcos
>
> i have a problem ,if you help me.     " i sends bids and asks to  
> auctioneer,then i recieved bids and asks from onRecieve funtions  
> and satisfy some conditions. and get the results, but i want to   
> set time  on auctioneer  like 100 sec to recieve ask and bid and  
> send final price. and start the auction again".
>
>
>
> thanx
> Mehtab
>
> Get news, entertainment and everything you care about at Live.com.  
> Check it out!

Marcos Dias de Assuncao
Grid Computing and Distributed Systems (GRIDS) Laboratory
Department of Computer Science and Software Engineering
The University of Melbourne, Australia
Email: ma...@cs...

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[GridSim-users] Fwd: time interval in double auction

[Srikumar V. <sri...@gm...>]

---------- Forwarded message ----------
From: Mehtab Arif <mus...@ho...>
Date: Fri, Jul 11, 2008 at 2:17 PM
Subject: RE: time interval in double auction
To: Srikumar Venugopal <sri...@gm...>


Hi Srikumar
Thanx for response  I,m using GridSim to implement discrete time
double auction  let assume i have 3 users sending bids to auctioneer
and at the same time let we have 3 resource provider sends asks to
auctioneer. auctioneer have 60 sec to gatehr the bids and ask and
select the the winner bid and ask from all asks and bid . my question
is in gridSim auctioneer class how i define a time interval to gather
the bids and asks


Mehtab Arif

> Date: Fri, 11 Jul 2008 11:57:09 +1000
> From: sri...@gm...
> To: mus...@ho...
> Subject: Re: time interval in double auction
>
> Hi Arif,
> Unfortunately, I have not been able to understand which system you
> are working on. Can you give me more details ?
>
> Srikumar.
>
> On Fri, Jul 11, 2008 at 1:01 AM, Mehtab Arif <mus...@ho...> wrote:
> > Hi Srikumar
> >
> >
> > i,m going to implement discrete time double auction in which auctioneer
> > gather bids and ask for some time interval for example 60 sec and then
> > announce the winner, and then start auction again, I want to know whats
> > functionality i'll use to gather the bids and ask for some time interval ?.
> > I,m waiting for your expertly comments
> >
> >
> > Thanx
> >
> >
> > Mehtab Arif
> >
> > ________________________________
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