Abstract: A system includes a data store and a memory cache subsystem. A method for pre-fetching data from the data store for the cache includes determining a performance characteristic of a data store. The method also includes identifying a pre-fetch policy configured to utilize the determined performance characteristic of the data store. The method also includes pre-fetching data stored in the data store by copying data from the data store to the cache according to the pre-fetch policy identified to utilize the determined performance characteristic of the data store.

Abstract: A compression manager generates a reduced-size data set for a page. The reduced-size data set is stored on a storage medium by a storage module, and unused portions of the page are identified and/or recorded by the storage module. The reduced-size data set may be generated by compressing the page. The reduced-size data set may be written in response to a request from a client, which provides a message that identifies the unused portion(s) of the page. The page may be stored in a file, and the unused portion may correspond to empty portion(s) within the file. The storage module may maintain an index to map the page to the reduced-size data set, such that portions of the page are unmapped. The storage capacity used by the page may correspond to the mapped portion of the page, and exclude portion(s) of the page that are unmapped.

Abstract: A compression manager generates a reduced-size data set for a page. The reduced-size data set is stored on a storage medium by a storage module, and unused portions of the page are identified and/or recorded by the storage module. The reduced-size data set may be generated by compressing the page. The reduced-size data set may be written in response to a request from a client, which provides a message that identifies the unused portion(s) of the page. The page may be stored in a file, and the unused portion may correspond to empty portion(s) within the file. The storage module may maintain an index to map the page to the reduced-size data set, such that portions of the page are unmapped. The storage capacity used by the page may correspond to the mapped portion of the page, and exclude portion(s) of the page that are unmapped.

Abstract: A system includes a data store and a memory cache subsystem. A method for pre-fetching data from the data store for the cache includes determining a performance characteristic of a data store. The method also includes identifying a pre-fetch policy configured to utilize the determined performance characteristic of the data store. The method also includes pre-fetching data stored in the data store by copying data from the data store to the cache according to the pre-fetch policy identified to utilize the determined performance characteristic of the data store.

Abstract: One embodiment is a method that transmits a packet having a bit field with a Time-to-live (TTL) value from a requesting node to a plurality of receiving nodes. The TTL value is decreased at each of the receiving nodes, and the packet is sent back to the requesting node that compares a value in the bit field with the TTL value to determine a topology of the receiving nodes connected to the requesting node.

Abstract: One embodiment is a method that transmits a packet having a bit field with a Time-to-live (TTL) value from a requesting node to a plurality of receiving nodes. The TTL value is decreased at each of the receiving nodes, and the packet is sent back to the requesting node that compares a value in the bit field with the TTL value to determine a topology of the receiving nodes connected to the requesting node.