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PSDI Army
yii2
Commits
bcdd8b26
Commit
bcdd8b26
authored
Jun 26, 2014
by
Riverlet
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caching-data.md
docs/guide-zh-CN/caching-data.md
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docs/guide-zh-CN/caching-data.md
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bcdd8b26
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@@ -24,7 +24,7 @@ if ($data === false) {
## 缓存组件 <a name="cache-components"></a>
数据缓存需要称作“
*缓存组件*
”的东西提供支持,它代表着各种缓存存储
介质
,例如内存,文件,数据库。
数据缓存需要称作“
*缓存组件*
”的东西提供支持,它代表着各种缓存存储
器
,例如内存,文件,数据库。
缓存组件通常注册为应用程序组件,这样它们就可以接受全局性配置和调用。如下代码演示了如何配置
`cache`
应用程序组件使用两个
[
memcached
](
http://memcached.org/
)
服务器:
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@@ -66,41 +66,30 @@ if ($data === false) {
> Tip: 你可以注册多个缓存组件,很多依赖缓存的类默认调用名为 `cache` 的组件(例如 [[yii\web\UrlManager]])。
### Supported Cache Storage <a name="supported-cache-storage"></a>
Yii supports a wide range of cache storage. The following is a summary:
*
[
[yii\caching\ApcCache
]
]: uses PHP
[
APC
](
http://php.net/manual/en/book.apc.php
)
extension. This option can be
considered as the fastest one when dealing with cache for a centralized thick application (e.g. one
server, no dedicated load balancers, etc.).
*
[
[yii\caching\DbCache
]
]: uses a database table to store cached data. To use this cache, you must
create a table as specified in
[
[yii\caching\DbCache::cacheTable
]
].
*
[
[yii\caching\DummyCache
]
]: serves as a cache placeholder which does no real caching.
The purpose of this component is to simplify the code that needs to check the availability of cache.
For example, during development or if the server doesn't have actual cache support, you may configure
a cache component to use this cache. When an actual cache support is enabled, you can switch to use
the corresponding cache component. In both cases, you may use the same code
`Yii::$app->cache->get($key)`
to attempt retrieving data from the cache without worrying that
`Yii::$app->cache`
might be
`null`
.
*
[
[yii\caching\FileCache
]
]: uses standard files to store cached data. This is particular suitable
to cache large chunk of data, such as page content.
*
[
[yii\caching\MemCache
]
]: uses PHP
[
memcache
](
http://php.net/manual/en/book.memcache.php
)
and
[
memcached
](
http://php.net/manual/en/book.memcached.php
)
extensions. This option can be considered as
the fastest one when dealing with cache in a distributed applications (e.g. with several servers, load
balancers, etc.)
*
[
[yii\redis\Cache
]
]: implements a cache component based on
[
Redis
](
http://redis.io/
)
key-value store
(redis version 2.6.12 or higher is required).
*
[
[yii\caching\WinCache
]
]: uses PHP
[
WinCache
](
http://iis.net/downloads/microsoft/wincache-extension
)
(
[
see also
](
http://php.net/manual/en/book.wincache.php
)
) extension.
*
[
[yii\caching\XCache
]
]: uses PHP
[
XCache
](
http://xcache.lighttpd.net/
)
extension.
*
[
[yii\caching\ZendDataCache
]
]: uses
### 支持的缓存存储器 <a name="supported-cache-storage"></a>
Yii 支持一系列缓存存储器,概况如下:
*
[
[yii\caching\ApcCache
]
]: 使用 PHP
[
APC
](
http://php.net/manual/en/book.apc.php
)
扩展。这个选项可以认为是集中式应用程序环境中(例如:单一服务器,没有独立的负载均衡器等)最快的缓存方案。
*
[
[yii\caching\DbCache
]
]: 使用一个数据库的表存储缓存数据。要使用这个缓存,你必须创建一个
[
[yii\caching\DbCache::cacheTable
]
] 对应的表。
*
[
[yii\caching\DummyCache
]
]: 仅作为一个缓存占位符,不实现任何真正的缓存功能。
这个组件的目的是为了简化那些需要查询缓存有效性的代码。例如,在开发中如果服务器没有实际的缓存支持,你就可以用它配置一个缓存组件。
一个真正的缓存服务启用后,就可以切换为使用相应的缓存组件。两种条件下你都可以使用同样的代码
`Yii::$app->cache->get($key)`
尝试从缓存中获取数据而不用担心
`Yii::$app->cache`
可能是
`null`
。
*
[
[yii\caching\FileCache
]
]: 使用标准文件存储缓存数据。这个特别适用于缓存大块数据,例如一个网页的内容。
*
[
[yii\caching\MemCache
]
]: 使用 PHP
[
memcache
](
http://php.net/manual/en/book.memcache.php
)
和
[
memcached
](
http://php.net/manual/en/book.memcached.php
)
扩展。这个选项可以认为是分布式应用程序环境中(例如:多台服务器,有负载均衡等)最快的缓存方案。
*
[
[yii\redis\Cache
]
]: 实现了一个基于
[
Redis
](
http://redis.io/
)
键值对存储器的缓存组件(需要 redis 2.6.12 及以上版本的支持 )。
*
[
[yii\caching\WinCache
]
]: 使用 PHP
[
WinCache
](
http://iis.net/downloads/microsoft/wincache-extension
)
(
[
另可参考
](
http://php.net/manual/en/book.wincache.php
)
) 扩展.
*
[
[yii\caching\XCache
]
]: 使用 PHP
[
XCache
](
http://xcache.lighttpd.net/
)
扩展。
*
[
[yii\caching\ZendDataCache
]
]: 使用
[
Zend Data Cache
](
http://files.zend.com/help/Zend-Server-6/zend-server.htm#data_cache_component.htm
)
as the underlying caching medium.
作为底层缓存介质。
> Tip: You may use different cache storage in the same application. A common strategy is to use memory-based
cache storage to store data that is small but constantly used (e.g. statistical data), and use file-based
or database-based cache storage to store data that is big and less frequently used (e.g. page content).
> Tip: 你可以在同一个应用程序中使用不同的缓存存储器。一个常见的策略是使用基于内存的缓存存储器存储小而常用的数据(例如:统计数据),使用基于文件或数据库的缓存存储器存储大而不太常用的数据(例如:网页内容)。
## Cache APIs <a name="cache-apis"></a>
...
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