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توضیحات

Basic database persistance / connection pooling for Django + Postgres.

ویژگی	مقدار
سیستم عامل	-
نام فایل	django-db-pool-0.0.9
نام	django-db-pool
نسخه کتابخانه	0.0.9
نگهدارنده	[]
ایمیل نگهدارنده	[]
نویسنده	Greg McGuire
ایمیل نویسنده	gregjmcguire+github@gmail.com
آدرس صفحه اصلی	https://github.com/gmcguire/django-db-pool
آدرس اینترنتی	https://pypi.org/project/django-db-pool/
مجوز	BSD licence, see LICENSE

Django DB Pool ============= **Note that this code has not been rigorously tested in high-volume production systems! You should perform your own load / concurrency tests prior to any deployment. And of course, patches are highly appreciated.** Another connection pool "solution"? ----------------------------------- Yes, alas. Django punts on the problem of pooled / persistant connections ([1][1]), generally telling folks to use a dedicated application like PGBouncer (for Postgres.) However that's not always workable on app-centric platforms like Heroku, where each application runs in isolation. Thus this package. There are others ([2][2]), but this one attempts to provide connection persistance / pooling with as few dependencies as possible. Currently only the Django's postgres_psycopg2 / postgis drivers are supported. Connection pooling is implemented by thinly wrapping a psycopg2 connection object with a pool-aware class. The actual pool implementation is psycop2g's built-in [ThreadedConnectionPool](http://initd.org/psycopg/docs/pool.html), which handles thread safety for the pool instance, as well as simple dead connection testing when connections are returned. Because this implementation sits inside the python interpreter, in a multi-process app server environment the pool will never be larger than one connection. However, you can still benefit from connection persistance (no connection creation overhead, query plan caching, etc.) so the (minimal) additional overhead of the pool should be outweighed by these benefits. TODO: back this up with some data! Requirements ------------ * [Django 1.3 - 1.5](https://www.djangoproject.com/download/) * [PostgreSQL](http://www.postgresql.org/) or [PostGIS](http://postgis.net/) for your database Installation ------------ pip install django-db-pool Usage ----- * PostgreSQL * Change your `DATABASES` -> `ENGINE` from `'django.db.backends.postgresql_psycopg2'` to `'dbpool.db.backends.postgresql_psycopg2'`. * PostGIS * Change your `DATABASES` -> `ENGINE` from `'django.contrib.gis.db.backends.postgis'` to `'dbpool.db.backends.postgis'`. If you are in a multithreaded environment, also set `MAX_CONNS` and optionally `MIN_CONNS` in the `OPTIONS`, like this: 'default': { 'ENGINE': 'dbpool.db.backends.postgresql_psycopg2', 'OPTIONS': {'MAX_CONNS': 1}, # These options will be used to generate the connection pool instance # on first use and should remain unchanged from your previous entries 'NAME': 'test', 'USER': 'test', 'PASSWORD': 'test123', 'HOST': 'localhost', 'PORT': '', } See the [code][base] for more information on settings `MAX_CONNS` and `MIN_CONNS`. You can set `TEST_ON_BORROW` (also in the `OPTIONS`) to True if you would like a connection to be validated each time it is checked out. If you enable this, any connection that fails a test query will be discarded from the pool and a new connection fetched, retrying up to the largest size of the pool. Since this incurs some overhead you should weigh it against the benefit of transparently recovering from database connection failures. Lastly, if you use [South](http://south.aeracode.org/) (and you should!) you'll want to make sure it knows that you're still using Postgres: SOUTH_DATABASE_ADAPTERS = { 'default': 'south.db.postgresql_psycopg2', } [1]: https://groups.google.com/d/topic/django-users/m1jeE4Cxr9A/discussion [2]: https://github.com/jinzo/django-dbpool-backend [base]: https://github.com/gmcguire/django-db-pool/blob/0.0.8/dbpool/db/backends/postgresql_psycopg2/base.py#L47-60

نحوه نصب

نصب پکیج whl django-db-pool-0.0.9:

pip install django-db-pool-0.0.9.whl

نصب پکیج tar.gz django-db-pool-0.0.9:

pip install django-db-pool-0.0.9.tar.gz