Network-based erasure-coded memory reserve

A computer program product comprising:

• one or more computer readable storage media;
• and
• program instructions stored on the one or more storage media and configured to perform operations comprising:
• configuring a first memory as a first erasure-coded memory in a plurality of erasure-coded memories at a first device of a plurality of devices, the plurality of devices configured to deliver a network service using common data, the first erasure-coded memory participating in an erasure-coded memory reserve, the erasure-coded memory reserve comprising the plurality of erasure-coded memories corresponding to the plurality of devices;
• storing, in the first erasure-coded memory, a first slice of the common data;
• transmitting a first request for a second slice of the common data from the first device to a second device in the plurality of devices responsive to a request for the network service at the first device, wherein the second slice is stored in a second erasure-coded memory in the second device;
• and
• constructing the common data at the first device using the first slice and the second slice without communicating with a common source of the common data, wherein the common data comprises more slices than the first slice and the second slice, and wherein the first slice and the second slice are each erasure-coded such that the common data can be constructed without the more slices.

A computer system comprising a processor and one or more computer readable storage media, and program instructions collectively stored on the one or more computer readable storage media, the program instructions executable by the processor to cause the processor to perform operations comprising:

• configuring a first memory as a first erasure-coded memory in a plurality of erasure-coded memories at a first device of a plurality of devices, the plurality of devices configured to deliver a network service using common data, the first erasure-coded memory participating in an erasure-coded memory reserve, the erasure-coded memory reserve comprising the plurality of erasure-coded memories corresponding to the plurality of devices;
• storing, in the first erasure-coded memory, a first slice of the common data;
• transmitting a first request for a second slice of the common data from the first device to a second device in the plurality of devices responsive to a request for the network service at the first device, wherein the second slice is stored in a second erasure-coded memory in the second device;
• and
• constructing the common data at the first device using the first slice and the second slice without communicating with a common source of the common data, wherein the common data comprises more slices than the first slice and the second slice, and wherein the first slice and the second slice are each erasure-coded such that the common data can be constructed without the more slices.