jueves, 29 de marzo de 2012

Report #8

I make a research about How to replicate data from a server to another server, and I found some things interesting like Couchdb.

Couchdb is plugged into the web, all you could use HTTP for creating and making queries (GET/PUT/POST/DELETE...), and it's RESTful, plus the fact that it's portable and great for peer to peer sharing and provides a different model for data storage than a traditional relational database in that it does not represent data as rows within tables, instead it stores data as "documents" in JSON format.

We can handling using python like in this tutorial that explain How to make a replication I found here:

The objective that I have to this week and the next is try to make a Demo or something.

To start I'll type in the wiki how to install the enviroment.

My nomination for this week is:

  Mr. X

jueves, 1 de marzo de 2012

Basic Concepts

Signal or Signals are an operating system feature that provide a means of notifying your program of an event, and having it handled asynchronously.  

 Just wait for synchronization operation something like lock acquisition to complete a task.  

It's the direction where a file or something is allocated.  

A processor is the logic circuitry that responds to and processes the basic instructions that drive a computer.  

A Thread is a concurrent unit of execution. It has its own call stack for methods being invoked, their arguments and local variables.

Distributed computing is a field of computer science that studies distributed systems.A distributed system consists of multiple autonomous computers that communicate through a computer network. The computers interact with each other in order to achieve a common goal. A computer program that runs in a distributed system is called a distributed program, and distributed programming is the process of writing such programs.  

Quality software is reasonably bug-free, delivered on time and within budget, meets requirements and/or expectations, and is maintainable.
Synchronization refers to one of two distinct but related concepts: synchronization of processes, and synchronization of data. Process synchronization refers to the idea that multiple processes are to join up or handshake at a certain point, so as to reach an agreement or commit to a certain sequence of action. Data synchronization refers to the idea of keeping multiple copies of a dataset in coherence with one another, or to maintain data integrity.  

 A port is an application-specific or process-specific software construct serving as a communications endpoint in a computer's host operating system.It's associated with an IP address of the host, as well as the type of protocol used for communication.  

A user is an agent, either a human agent (end-user) or software agent, who uses a computer or network service.  

A software message indicating that something has happened, such as a keystroke or mouse click.

Transfers per second and its more common derivatives gigatransfers per second (abbreviated GT/s) and megatransfers per second (MT/s) are informal language that refer to the number of operations transferring data that occur in each second in some given data-transfer channel.


My report #5

I explained what was happening in the code that was made in C, using the library MPI.Because we just had the code and nobody knew what was happening.

This is the link:


Now I don't have a clear idea what to do next week, any suggestions will be welcome.