Hello there. I have a research project on distributed systems, I asked the Prof. if i can work on MapReduce and he is giving me hard time that MapReduce is very broad and asked me to pick a specific problem about either distributed systems frameworks like MapReduce or something else that has networking and distributed computing in it. ...
Hi everyone, I would like to know what tools, frameworks or libraries you would use, to spread your C++ application across multiple machines. Im searching for a way to create a framework/environment, in which a master-server can hand many seperated Jobs to different seperated clients, who give back their result on a special Job. The res...
I have a system where some loosely coupled components are communicating by exchanging messages over JMS. I am now looking at a new requirement which leads to some shared resource needing protection from access by two or more components at the same time (more or less an instance of the reader/write problem). I am looking for a way to coor...
Hey guys, i m new to SVN.. have downloaded visualsvn server and client with tortoiseSVN.. the problem is.. we are group of 4 ppl..we are developin a website on asp.net.. i want the solution file to be in a repository on a machine which can be a server(desktop). and rest are all laptops tryin to gather the updated data.. we are working f...
Hi, I'm writing some kind of Computing farm with central server giving tasks and nodes that compute them. I wanted to write it in such way, that nodes don't know what exactly they are computing. They get (from server) an object that implements IComputable iterface, has one method, .compute() that returns IResult type object and send it...
I am looking for an algorithm to change it's keys every period and can still be deciphered. Basically I am looking for a way to maintain a secured link between mobile clients and a stationary server in such a way that even if you intercepted the hash or even the authentication credentials themselves they would change on both sides every ...
I have a computation task which is split in several individual program executions, with dependencies. I'm using Condor 7 as task scheduler (with the Vanilla Universe, due do constraints on the programs beyond my reach, so no checkpointing is involved), so DAG looks like a natural solution. However some of the programs need to run on the ...
Hi all, I am new to RIM, and currently taking the tutorial at http://java.sun.com/docs/books/tutorial/rmi/overview.html I am able to start server like: C:\Documents and Settings\myHome>java -cp c:\home\ann\src;c:\home\ann\public_ html\classes\compute.jar -Djava.rmi.server.codebase=file:/c:/home/ann/public_htm l/classes/compute.jar -Dj...
Hello, I have a problem using a distributed WSDL File ( scheme / other definitions are declared outside the actual wsdl) with php's SoapClient. This is the Fault Message I get: SOAP-ERROR: Parsing WSDL: 'getSomeInfo' already defined. After some googling , it seems to be a bug inside php as someone else discovered exactly the same pr...
I am a Git newbee with UNIX SCCS and Microsoft Visual SourceSafe experience. I’m just learning Git and it seems to have a huge and painful learning curve. I’ve already seen Git blow away all the data files I hadn’t committed, which concerns me. (How a utility can delete data files without warning is beyond me). Linus Torvalds, in his vi...
Hey guys, Over the last few months I've often come across the same Design obstacles when developing certain kinds of distributed applications. Firstly, let me set out my environment, and distributed applications: .NET enviroment All communication is done over HTTP Applications are often on different servers Usually is a combination o...
I am working on a JAVA project in which there are multiple terminals. These terminals act as client and servers. For example if there are 3 terminals A,B and C.Then at any given point in time one of them say A, will be a client making broadcast request. The other two terminals, B and C, will reply. I am using sockets to make them communi...
The file that's mystifying me is v5/employer/controllers/_employer.php. In the first image, you'll see that Brian changed the file in a commit on 14:55:47 called "time to commit stuff". But that commit's only child (second image), a merge operation Brian did at 14:56:45, does not show any changes to that file. But it's different! ...
Hello, Is it possible to implement a system similar to this: 1 Centralized assembly storage in a central web application N Client web applications consuming types in assemblies in this centralized web app. It should work this way. I design an interface and deploy it with every client application Client application request for a spe...
Hi, I have this strange problem with ehcache 2.0 that I hope someone can help me with. I have set up a cluster of two hosts, A and B. I can see that heartbeats are received at both ends, so I'm pretty sure the networking and multicast stuff is working. The problem is that is I put an element into the cache at host A, I can see in the lo...
Is it possible to implement at most n users based on majority voting, or voting district by Maekawa? "At most n users" here means n users can access the resource at the same time. I think both of them are not possible, as there's always a case that can violate the rule. ...
Are there any tools that will allow me to plan and manage a project using an agile/iterative style from the command-line, storing the data on the filesystem, similar to how BugsEverywhere/ditz/ticgit work? ...
I am a bit confused about this. If you're building a distributed application, which in some cases may perform parallel operations (although not necessarily mathematical), should you use ASIO or something like MPI? I take it MPI is a higher level than ASIO, but it's not clear where in the stack one would begin. ...
Is using JBoss Cache as distributed state repository a good idea? Can JBoss Cache be applied in situation when you need the guarantee that each time you read something from repository you get the newest version of it? - and irrespective of which node in a cluster we consider? ...
In C++, I've written a mathematical program (for diffusion limited aggregation) where each new point calculated is dependent on all of the preceding points. Is it possible to have such a program work in a parallel or distributed manner to increase computing speed? If so, what type of modifications to the code would I need to look into? ...