Risk based rebuild of data objects in an erasure coded storage system

One or more machine-readable media comprising program code for data object rebuild in a distributed erasure coded storage system, the program code to:

• in response to receipt of indications of data object fragments available for data object rebuild from a plurality of storage nodes throughout the distributed erasure coded storage system, quantify risks of losing the capability to rebuild each of a plurality of data objects corresponding to the data object fragments, wherein the program code to quantify risks comprises program code to quantify the risks based, at least in part, on a count of data object fragments indicated as available for rebuild of a corresponding data object relative to a minimum number of data object fragments for an erasure coding of the distributed erasure coded storage system;
• prioritize rebuild of the plurality of data objects based, at least in part, on the quantified risks of the plurality of data objects;
• and
• initiate rebuild, within a background execution space, of the plurality of data objects according to the prioritization.

An apparatus comprising:

• a processor;
• and
• a machine-readable medium comprising program code executable by the processor to cause the apparatus to,
• obtain, from a plurality of storage nodes throughout a storage system, indications of constituent fragments for data objects, wherein each of the data objects has been divided into constituent fragments in the storage system according to an erasure coding technique;
• for each of the data objects, quantify risk of losing capability to rebuild the data object based, at least in part, on the indications of constituent fragments for the data object;
• and
• request rebuild of those of the data objects with a quantified risk that exceeds a first threshold.