samolds / mcmemcached

An experiment warming up a cold Memcached cache using various techniques.

McMemcached

Class Project for University of Utah Distributed Systems

Dependencies

• wget
• apt-get (ubuntu) OR brew (osx)

Getting client memcache running up against memcache server on fresh ubuntu

git clone https://cs6963.utah.systems/u0810837/memcached.git mcmemcached
cd mcmemcached
./setup.sh
source ~/.bashrc

./run.sh

Experiments

There are 4 main experiments, located in src/experiments/. If you have the memcache servers running, you can run them with:

go run src/experiments/<dir>/<filename>.go

OR, you can use the provided ./run.sh shell script. If provided 1 of the following arguments, it will spin up the memcache servers and run the associated experiment against the servers:

Command	Experiment Source
./run.sh	src/experiments/1naive/client_zipf.go
./run.sh 1z	src/experiments/1naive/client_zipf.go
./run.sh 1n	src/experiments/1naive/client_n.go
./run.sh 2	src/experiments/2coldstart/client.go
./run.sh 3	src/experiments/3querycold/client.go
./run.sh 4	src/experiments/4hotkey/client.go

To make changes to memcache source and run full tamale

• cd memcache
• Edit memcache source as desired
• make
• cd ..
• ./run.sh

To make plots with R:

setwd("~/Desktop")
ee<-read.csv("time_stats_1z.csv")
plot(x=ee$time, y=ee$mean_response_time, main="Experiment 1", ylab="Mean Response Time", xlab="Time (ms)", xlim=c(0,1200000), ylim=c(1,6))

References

• Facebook Memcache
• Saving Cash by Using Less Cache

Contributors:

• Keith Downie
• Rehan Ghori
• Sam Olds