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Building

Install the following libraries:

 sudo apt-get install protobuf-compiler libcrypto++9v5 libcrypto++9v5-dbg libcrypto++-dev libprotobuf9v5 libprotobuf-dev scons libnuma-dev libconfig-dev build-essential psmisc python-matplotlib

Get the source code:

git clone git://github.com/moritzraho/logcabin.git
cd logcabin
git submodule update --init

To build for IX set the following variable in Local.sc. If set to 0 the build will be done for Linux:

IX=1

Build:

scons

In a separate directory clone and build IX, refer to https://github.com/ix-project/ix.

Starting a cluster and running the Benchmark

Create a file logcabin-1.conf:

serverId = 1 #should be unique for every machine in the cluster
listenAddresses = 192.168.17.1:1234 #should be the same address as in ix.conf
snapshotWatchdogMilliseconds = 0

For running on Linux:

rm -rf storage
build/LogCabin --config logcabin-1.conf --bootstrap

Removing the storage cleans any previous instance of the cluster. The server with ID 1 will now have a valid cluster membership configuration in its log. At this point, there's only 1 server in the cluster, so only 1 vote is needed: it'll be able to elect itself leader and commit new entries. We can now start this server (leave it running):

build/LogCabin --config logcabin-1.conf

Otherwise, for running LogCabin on IX, do:

cd path/to/ix
sudo rm -rf storage
sudo ./dp/ix -l 5 -- path/to/logcabin/build/LogCabin --config path/to/logcabin/logcabin-1.conf --bootstrap
(CTRL + C)
sudo ./dp/ix -l 5 -- path/to/logcabin/build/LogCabin --config path/to/logcabin/logcabin-1.conf

To start other machines repeat these steps without bootstrapping and by changing the serverId and address in the logcabin-1.conf file.

Now build LogCabin for Linux on another machine and use the reconfiguration command to add the servers to the cluster:

ALLSERVERS=192.168.17.1:1234,ip:port,...
build/Examples/Reconfigure --cluster=$ALLSERVERS set ip:port ip:port ...

We will run the benchmarks from this same machine, first add this to scripts/localconfig.py:

smokehosts = hosts = [
    ('192.168.17.1', '192.168.17.1:1234', 1),
    ('ip', 'ip:port', serverId),
    ...
]

Run the benchmark, be sure that psmisc is installed (the script uses killall to kill background jobs):

python scripts/bench_script.py

Results can be found in results/lat_res#ofmachines and results/rps_res#ofmachines. A script plotting the results is located in results/plot.py. To generate a graph, modify the RES_FILES and LABELS variables in plot.py and make sure that python-matplotlib is installed.

cd results
python plot.py

(for more details refer to the README in https://github.com/logcabin/logcabin)