Failure fault tolerance in distributed memory systems

Abstract

Disclosed in some examples are methods, systems, devices, and architectures which provide for techniques for memory device and memory fabric redundancy within distributed memory systems. In some examples, two memory devices are paired and each stores a same set of data such that writes to the memory devices are duplicated and reads may be satisfied from either device. In some examples, a memory processing unit (MPU) may be incorporated into the memory architecture to support these paired memory devices. The MPU may be placed between the host and a multi-planed memory fabric which connects to multi-ported CXL memory devices. In some examples, the MPU may also enable the use of alternative fabric links. That is, if a memory fabric link between the MPU and a memory device is unavailable, an alternative link may be utilized to restore connectivity to a memory device.