October 2020
Intermediate to advanced
261 pages
5h 32m
Chinese
Content preview from Graphite监控
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Peter
的
Graphite
故事
｜
225
示例9-11：转储SQLite数据库的副本
$ cd /opt/graphite/webapp/graphite/
$ PYTHONPATH=/opt/graphite/webapp \
django-admin.py dumpdata --settings=graphite.settings > ~/initial_data.json
你可能会问自己，为什么我会选择一个看似随意的文件名，比如
initial_data.json
。如
果你和我一样，经常会发现自己习惯将各种命令行输出重定向到
foo.txt
或
why_even_
did_I_do_this.poop
等文件。事实证明，
Django
提供了一种自主（非交互）的方法来运
行
fixtures
。这个功能依赖一个数据文件的存在，你现在可能已经猜到了，它的名字叫
initial_data.json
。
在我们继续之前，现在是更新
local_settings.py
中的
DATABASES
指令块的最佳时机（参见
示例
9-12
）。就像我们在进行全新安装时做的那样，你需要改变所有的属性来匹配你的
新
PostgreSQL
角色和数据库名称。
ENGINEE
属性必须更新成新的
psycopg2
驱动。
示例9-12：在导入数据前更新数据库配置
DATABASES = {
'default': {
'NAME': 'graphite',
'ENGINE': 'django.db.backends.postgresql_psycopg2', ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.