Steps with explanations to set up a server using:
- Virtualenv
- Virtualenvwrapper
- Django
- Gunicorn
#!/bin/bash | |
NAME="hello_app" # Name of the application | |
DJANGODIR=/webapps/hello_django/hello # Django project directory | |
SOCKFILE=/webapps/hello_django/run/gunicorn.sock # we will communicte using this unix socket | |
USER=hello # the user to run as | |
GROUP=webapps # the group to run as | |
NUM_WORKERS=3 # how many worker processes should Gunicorn spawn | |
DJANGO_SETTINGS_MODULE=hello.settings # which settings file should Django use | |
DJANGO_WSGI_MODULE=hello.wsgi # WSGI module name |
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |