Dynamic per-node pre-pulling in distributed computing

A computer-program product tangibly embodied in a non-transitory machine-readable storage medium, the computer-program product including instructions operable to cause at least one processor to perform pre-pulling operations at a time prior to receiving a request to execute an application routine, the pre-pulling operations comprising:

• receive, at the at least one processor and from a node device via a network:
• an indication of ability of the node device to provide a resource required to support execution of the application routine within the node device;
• at least one identifier of at least one image that is stored within a cache of the node device, and that comprises an executable routine that is required to support the execution of application routine within the node device;
• and
• an indication of at least one revision level of the at least one image stored within the cache, wherein:
• portions of contents of the cache are evicted from the cache based on at least one of which portion of the contents is least recently accessed or which portion of the contents is least frequently accessed;
• and
• at least one portion of the contents of the cache includes the at least one image;
• analyze the indication of ability of the node device to provide the resource to determine whether the node device is able to support the execution of the application routine;
• in response to a determination that the node device is able to support the execution of the application routine, identify a first image that is stored in a repository, and that comprises an executable routine that is required to support the execution of the application routine within the node device;
• compare each identifier of the at least one identifier to the identity of the first image to determine whether, among the at least one image stored in the cache of the node device, there is a second image that comprises an executable routine that matches the executable routine of the first image;
• and
• in response to a match between the identity of the first image stored in the repository and an identifier of a second image stored within the cache of the node device, the at least one processor is caused to perform operations comprising:
• compare a revision level of a most recent version of the first image to a revision level of the second image;
• and
• in response to the revision level of the most recent version of the first image being more recent than the revision level of the second image, the at least one processor is caused to perform operations comprising:
• retrieve the most recent version of the first image from the repository;
• and
• store the most recent version of the first image within the node device, wherein:
• the storage of the most recent version of the first image within the node device triggers storage of a copy of the most recent version of the first image within the cache of the node device to enable retrieval of the executable routine of the most recent version of the first image from within the cache to support execution of the application routine within the node device in response to subsequently receiving the request to execute the application routine.

A computer-implemented method comprises performing pre-pulling operations at a time prior to receiving a request to execute an application routine, the pre-pulling operations comprising:

• receiving, by at least one processor and from a node device via a network:
• an indication of ability of the node device to provide a resource required to support execution of the application routine within the node device;
• at least one identifier of at least one image that is stored within a cache of the node device, and that comprises an executable routine that is required to support the execution of application routine within the node device;
• and
• an indication of at least one revision level of the at least one image stored within the cache, wherein:
• portions of contents of the cache are evicted from the cache based on at least one of which portion of the contents is least recently accessed or which portion of the contents is least frequently accessed;
• and
• at least one portion of the contents of the cache includes the at least one image;
• analyzing, by the at least one processor, the indication of ability of the node device to provide the resource to determine whether the node device is able to support the execution of the application routine;
• in response to a determination that the node device is able to support the execution of the application routine, identifying, by the at least one processor, a first image that is stored in a repository, and that comprises an executable routine that is required to support the execution of the application routine within the node device;
• comparing each identifier of the at least one identifier to the identity of the first image to determine whether, among the at least one image stored in the cache of the node device, there is a second image that comprises an executable routine that matches the executable routine of the first image;
• and
• in response to a match between the identity of the first image stored in the repository and an identifier of a second image stored within the cache of the node device, performing operations comprising:
• comparing a revision level of a most recent version of the first image to a revision level of the second image;
• and
• in response to the revision level of the most recent version of the first image being more recent than the revision level of the second image, performing operations comprising:
• retrieving the most recent version of the first image from the repository;
• and
• storing the most recent version of the first image within the node device, wherein:
• the storage of the most recent version of the first image within the node device triggers storage of a copy of the most recent version of the first image within the cache of the node device to enable retrieval of the executable routine of the most recent version of the first image from within the cache to support execution of the application routine within the node device in response to subsequently receiving the request to execute the application routine.