A script to reproduce an issue with docker build and many concurrent build requests.
To reproduce:
# stop dockerd and restart it with stdout logging
./setup.sh
# run the test
./run.py [num concurrent build]
# cleanup and restore docker service
./cleanup
Below are the results of running x concurrent builds
Docker version 1.3.3, build d344625
Kernel Version: 3.13.0-35-generic
CPUs: 8
build 1: elapsed 8.411
build 2: elapsed 19.825
build 3: elapsed 30.438
build 4: elapsed 41.650
build 5: elapsed 54.865
build 10: elapsed 115.551
build 20: elapsed 321.406
With latest
Docker version 1.4.0, build 4595d4f
build 1: elapsed 8.410
build 5: elapsed 50.860
build 10: elapsed 113.535