Team 7: SUPER B RBAMAN 18-749: Fault-Tolerant Distributed Systems. Team Members. Mike Seto mseto@. Jeremy Ng jwng@. Wee Ming wmc@. Ian Kalinowski igk@. http://www.ece.cmu.edu/~ece749/teams/team7/ or just for ‘borbaman’. Baseline Application 1. SYNOPSIS:
Team 7: SUPER B RBAMAN
18-749: Fault-Tolerant Distributed Systems
or just for ‘borbaman’
pre-establish connections with working servers.
Before and after multi-threaded optimization
What went wrong?
Reduced the update period from 200 us to 500 ms
With faults…but why the high periodic jitter?
13 spikes above 200 ms
Bug discovered and fixed from analyzing results
3 spikes above 200 ms
However, these numbers are not realistically useful because
- Cluster variability influences jitter considerably
- Measurements are environment dependent
% of Outliers before = 0.1286%
% of Outliers after = 0.0296%
Load Balancing Worsens RTT Performance
Average RTT (µs)
Load-Balancing with DB lock bug fixed
Varying Server Load Affects RTT