Cache access management for resiliency and redundancy

A computer system including:

• at least one computing device;
• a set of one or more computer readable storage media;
• and
• program instructions, collectively stored in the set of one or more computer readable storage media, for causing the at least one computing device to perform computer operations including:
• establishing, by a host system that hosts virtual machines, access to a network-accessible cache device, wherein the network-accessible cache device is provided by a remote system across a network between the host system and the remote system, and wherein the establishing the access provides access to the network-accessible cache device to virtual input/output (I/O) servers of the host system;
• virtualizing the network-accessible cache device into cache partitions of a cache pool of the host system, wherein each cache partition of the cache partitions is assigned to cache data accessed by a respective virtual machine of the virtual machines, and each of the virtual I/O servers has access to the cache partitions;
• and
• managing accesses to the cache partitions by the virtual I/O servers in handing access requests by the virtual machines to access the cache partitions, wherein the managing load balances virtual machine access requests to access an assigned cache partition of the cache partitions across multiple virtual I/O servers of the virtual I/O servers, and provides failover recovery to recover from a failed virtual I/O server of the virtual I/O servers.

A computer program product including:

• a set of one or more computer readable storage media;
• and
• program instructions, collectively stored in the set of one or more computer readable storage media, for causing at least one computing device to perform computer operations including:
• establishing, by a host system that hosts virtual machines, access to a network-accessible cache device, wherein the network-accessible cache device is provided by a remote system across a network between the host system and the remote system, and wherein the establishing the access provides access to the network-accessible cache device to virtual input/output (I/O) servers of the host system;
• virtualizing the network-accessible cache device into cache partitions of a cache pool of the host system, wherein each cache partition of the cache partitions is assigned to cache data accessed by a respective virtual machine of the virtual machines, and each of the virtual I/O servers has access to the cache partitions;
• and
• managing accesses to the cache partitions by the virtual I/O servers in handing access requests by the virtual machines to access the cache partitions, wherein the managing load balances virtual machine access requests to access an assigned cache partition of the cache partitions across multiple virtual I/O servers of the virtual I/O servers, and provides failover recovery to recover from a failed virtual I/O server of the virtual I/O servers.