kazakosvas / system-programming

System Programming Project

System-programming

Project description

This project was created for System-programming class. The project was divided into 3 tasks.

In the 1st task, I implemented a set of data structures (Hash tables, red-black trees) to answer queries in a large dataset of records. The dataset is about monitoring the statistics of hospitals.

In the 2nd task, I implemented a distributed multi-process system that answers queries about viruses and diseases. A parent process is creating worker processes that handle the questions. The parent forwards the questions and receives answers through pipes and select syscall. Finally, I do some signal handling when having functions like read, write and select that may fail when a signal is caught.

In the 3rd task, I implemented:

1. A multi-threaded client, in which each thread sends a request to the server.

2. A multi-threaded server, in which each thread plays the role of consumer or producer. Producer thread accepts requests over the network and places them in a "circular" buffer. Consumer threads wait for a request to be accepted and then forward the request to a backend system over the network and send the answer back to the Client. Also, the server does signal handling in a multi-threaded context.

3. A multi-process backend system was created in the second task but it was updated to answer requests over the network.

Complile & Execute

In the first directory:

• Compile all programs: make

• Execute:

bill@LAPTOP-V9A2M01E:/Github/System-programming$ ./backend_system 123
bind: Permission denied
Port 123 was not available. System gave you port 38371

bill@LAPTOP-V9A2M01E:/Github/System-programming$ ./server -SP 1999 -system--name LAPTOP-V9A2M01E -system--port 43609

bill@LAPTOP-V9A2M01E:/Github/System-programming$ ./client -SP 1999 -server--name LAPTOP-V9A2M01E -file--questions questions/file_questions