Main Module to parse arguments and control Module to start Server/Clients Usage:
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Starts Server and Local Worker processes to mine ./project1
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Starts Remote Client and Local Workers + connects with Server ./project1 <server_ip>
Generates strings, mines locally and have a process waiting for remote clients to send strings Functions:
- start => Start Node, register name globally, server control
- work_local => Runs Worker processes locally
- allocator => Allocate works to processes (local/remote) => Sends/Receives messages & zeros count from processes and puts it to output
- generate_random_strings => generate strings of count particular count
- random_string => random string generation of fixed length
Spawns processes, connects to server if its a remote connection before spawning. Checks the no of cores to Functions:
- spawn_process => Spawn a process to work & send/receive messages to/from server
- connection => Connect to server by createing
- run_workers => Run workers based on the no of cores.
- server_status => Checks the server status and exits if server is not reachable
- miner => Mines the strings to bitcoins and send valid coins
- get_valid_bitcoins => Takes strings list and converts to bitcoins, check validity
- sha256 => string to bitcoin convertor
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Starting Server & Mining coins locally reaches cumulative cpu usage to ~85%.
- Generating one string at a time and sending for the processes to mine is the best case.
- No Network latency so best option is with 1 string per process and 100 * #cores
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Max Number of machines connected remotely to server
- Server connected on our machine (with local machine)
- Connected 4 working machines on the same network and was able to mine zeros_length of 6 with high speed
- Was able to do the same by getting all the machines to storm servers
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For zeros_length=5, the ratio of CPU time to REAL TIME = 3.4 (Machine i7 4cores 3.16GHz).
| String | Hash |
|---|---|
| saibandi;-W5c0KaUNEJakjV | 00000A731689E702FBA2E95C869B77BCD4B3BF49B4B9D75B49D680A8ED074788 |
| saibandi;i4Z0i91HUxuivu- | 00000D52F6B9D72A4ABA6D0A52EC2FA92EE814DDAC0D27C14E2A7CD31B086FC3 |
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Max bitcoins zeros length
- Was able to Mine bitcoin zeros_length = 10 which took for 2hrs
- Successfully able to mine zeros_length = 7, within 10min (local workers) i5 with 4 Logical Processors.
Prefix String Hash saibandi; pYNysqw3Cn4hGs3 000000750544C060BA263FB37FD32F72BB13304C458AE9973F4B1CC2FCADB9F6 saibandi; OM4RKHOcTJic0S7 000000613F49B44C235536D735F61CE6855799B24AB719494471ADEA26FD0E3C saibandi; NbmxrNIuonIjY7S 000000C7BBC016B467EC8F703A261923C0D44EAD0F1A58E3CC3195238ED1AA5F saibandi; qFwxpe98mspw4Io 0000005C18D6F577B37688791BDD5B7D59F4F32687C524EF5250C9A9604A7BED saibandi; 4TQDBOkypduvzUV 0000006E8C92A3C8A16D3EE8322CCAADD316615DF2E414E511BDA4364A8B432D -
With Multiple remote clients (2), No of strings generated to mines creates impact on performance.
- Too many strings (~20000) => keeps the client waiting for the server to generate strings [Server stays at 100% utilization, Client has fluctuations waiting ranging from 40-60]
- Too Few strings (~100) => network latency issues; too much time spent sending and receiving [Server has 60-70% utilization, Client has 30-40% utilization - Under utilized]
- Optimal cases (over the network)
- Best Multiple bitcoin mining (15000) [Server stays at 80-90% utilization, Client has almost constant 50% utilization]