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Вы можете ознакомиться и скачать презентацию на тему Page Cache. Доклад-сообщение содержит 20 слайдов. Презентации для любого класса можно скачать бесплатно. Если материал и наш сайт презентаций Mypresentation Вам понравились – поделитесь им с друзьями с помощью социальных кнопок и добавьте в закладки в своем браузере.

Слайды и текст этой презентации

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Page Cache 28.09.2012, Sven Blüge

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Technical Overview Programming

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Why to use page cache Rendering pages is expensive Reuse rendered snippets Increase overall performance Decrease page load time Decrease server load

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What is Page Cache

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Page Cache Example

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Page Cache Options Static content (js, css, images, …) Global time based Dynamic content (result of a pipeline) No cache Cache based on URL Cache personalized based on URL and PGID Number of possible PGIDs decreases hit ratio URL and PGID are part of the key used to determine a page from the cache PGID: Personalization Group ID, an ID generated by the system which contains for example user group assignments

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Page Cache Configuration - SMC

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Page Cache Configuration – Back Office

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Page Cache Invalidation Full invalidation Keyword based invalidation (Selective page cache clearing) Can be done using Back Office, Pipelet or plain Java Code

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Programming How to influence page cache behavior ISML level CMS Remote Slot/Includes Remote Pagelet

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Programming – isCache Describes the cache behavior of the current snippet Forbidden is useful to prevent the caching of uncachable areas. Conflicts result in entries in the error log The shortest period will win (this is different from older versions)

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Programming – isContent Defines if a snippet has to be cached personalized Personalized: snipped depends on the PGID

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Programming – isCacheKey Defines a cache key for the current snippet Can be a string or an object An object will be translates by a provider into a string

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Programming – isInclude Includes an isml template, an url or a directory By using isinclude you can divide a page into snippets with different caching properties

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Programming – isInclude Remote include vs. Local include

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Programming - CMS Slot/Include: remoteInclude="true„

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Programming - CMS Component: remoteInclude=„true“

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Programming – Hints Caching behavior definition happens at isml level Enable Page Cache during development time Use tags very careful and as high in the template hierarchy as possible Mark templates which are uncacheable as such Do no cache snippets which rely on data which is not present in the url or PGID Use remote includes to make as much cacheable as possible Minimize the usage of different urls with the same result (ViewProduct-Start?SKU=foo | ViewProduct-Start?UUID=XXX)

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$Programming – Hints share\system\config\cluster\webadapter.properties Override page cache settings by reloading a page in a browser  F5 bypasses the...$

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Programming – Hints share\system\config\cluster\webadapter.properties Override page cache settings by reloading a page in a browser  F5 bypasses the page cache pagecache.ignoreGetCacheControlHeaders = false Disable the page cache without using Back Office pagecache.static.enabled = false pagecache.pipeline.enabled = false