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large_​file_​optimization


The Large File Optimization (LFO) feature improves performance and reliability when delivering large files. You need this behavior for objects larger than 1.​8GB, and you should apply it to anything over 100MB. You should apply it only to the specific content to be optimized, such as a download directory's .gz files, and enable the use_​versioning option while enforcing your own filename versioning policy. Make sure you meet all the requirements and best practices for the LFO delivery.

Note that it is best to use Net​Storage for objects larger than 1.​8GB.

See also the large​_file​_optimization​_advanced behavior, which provides additional options for to configure partial object caching and HTTP/2 prefetching.

OptionTypeDescriptionRequires
enabledboolean

Enables the file optimization behavior.

{"displayType":"boolean","tag":"input","type":"checkbox"}
enable_​partial_​object_​cachingenum

Specifies whether to cache partial objects.

{"displayType":"enum","options":["PARTIAL_OBJECT_CACHING","NON_PARTIAL_OBJECT_CACHING"],"tag":"select"}
{"if":{"attribute":"enabled","op":"eq","value":true}}
PARTIAL_​OBJECT_​CACHING

Allows partial-object caching, which always applies to large objects served from Net​Storage. The size of the object to be cached can't be greater than 323 GB. To enable this, the origin needs to support byte range requests.

NON_​PARTIAL_​OBJECT_​CACHING

Caches entire objects. The size of the object to be cached can't be greater than 1800 MB.

minimum_​sizestring

Optimization only applies to files larger than this, expressed as a number suffixed with a unit string such as MB or GB.

enable_​partial_​object_​caching is PARTIAL_​OBJECT_​CACHING
{"displayType":"string","tag":"input","type":"text"}
{"if":{"attribute":"enablePartialObjectCaching","op":"eq","value":"PARTIAL_OBJECT_CACHING"}}
maximum_​sizestring

Optimization does not apply to files larger than this, expressed as a number suffixed with a unit string such as MB or GB. The size of a file can't be greater than 323 GB. If you need to optimize a larger file, contact Akamai Professional Services for help.

enable_​partial_​object_​caching is PARTIAL_​OBJECT_​CACHING
{"displayType":"string","tag":"input","type":"text"}
{"if":{"attribute":"enablePartialObjectCaching","op":"eq","value":"PARTIAL_OBJECT_CACHING"}}
use_​versioningboolean

When enable_​partial_​object_​caching is set to PARTIAL_​OBJECT_​CACHING, enabling this option signals your intention to vary filenames by version, strongly recommended to avoid serving corrupt content when chunks come from different versions of the same file.

enable_​partial_​object_​caching is PARTIAL_​OBJECT_​CACHING
{"displayType":"boolean","tag":"input","type":"checkbox"}
{"if":{"attribute":"enablePartialObjectCaching","op":"eq","value":"PARTIAL_OBJECT_CACHING"}}