Implemented by Shreyas Vinayakumar, Jeyenth Veerarahavan for CSCE 662 Distributed Systems by Radu Stoleru
A basic distributed system that can harness the power of many processors to speed up a compute-intensive task in the face of packet loss and an unreliable network
Learning goals: -features required to create a robust system, -handling lost or duplicated Internet packets, as well as failing clients and servers. -creating a set of layered abstractions in bridging between low-level network protocols and high-level applications.
This program can be used to find the reverse of the MD5 hash for moderately sized input strings. It works by dividing the task and assigning it to available agents called as "workers". The workers are co-ordinated by a single server process. The "server" accepts requests constantly from "client" entities and schedules them optimally among the available workers All communication between entities is over UDP using the specified protocol.
g++, make, Google Protobufs
To run the code on multiple systems, a LAN network is required
Run the following command the first time you build: make To remove old executables and build files make clean
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The server is started using the following command, specifying the port number for the server to use:
./server port
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One or more workers are started using the following command, specifying the address and port number of the server:
./worker host:port
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When a worker starts, it sends a join request message to the server, letting the server know that it is available.
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The user generates a cracking request by giving the following command, specifying the address and port of the server, the hash signature to be inverted, and the length of the password ./request host:port hash len
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The request client should generate a crack request message giving lower and upper values aa...a and zz...z, where the number of a’s and z’s is based on the length of the desired password.
-If it finds password pass, it should print Found: pass
- If it does not find a password, it should print Not Found
- If the client loses the connection to the server, it should print Disconnected
Packet loss may be simulated by setting the PACKET_DROP_RATE macro in the file lsp.h You can observe the effects of dropping packets on the performance