Patent ID: 11954346
Assignee: EMC IP HOLDING COMPANY LLC
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. A non-transitory computer-readable medium storing one or more processor-executable instructions, which, when executed by one or more processors of a storage processor, cause the one or more processors to perform the operations of:
receiving a write request, the write request including a request to store user data in a storage array that includes a plurality of solid-state drives (SSD) , the storage array the storage processor being part of a storage system;
reserving, by an allocation layer, one or more physical logical blocks (PLBs), each of the reserved PLBs being part of a respective one of a plurality of stripes; and
executing the write request by: identifying metadata that is associated with the write request, and writing the user data and the metadata to different data streams that are opened on the plurality of SSDs, wherein writing the user data and the metadata to different data streams causes: (i) the user data to be stored in one or more first erase units that are part of any of the plurality of SSDs, and (ii) the metadata to be stored in one or more second erase units that are part of any of the plurality of SSDs, such that no part of the metadata is stored on any of the first erase units, and no part of the user data is stored on any of the second erase units, the first and second erase units being part of a plurality of erase units that are mapped to the reserved PLBs,
wherein the storage array is a Redundant Array of Independent Disks (RAID) array,
wherein the allocation layer is configured to allocate only PLBs that are part of active stripes, and
wehrein a maximum number of stripes that are present in the in the storage system at any given time is determined in accordance with the equation of:

Sm=(Ndrives×Nstripes)/N_raid_drives

where Sm is the maximum number of stripes, Ndrives is a count of SSDs in the RAID array, and Nraid_drives is a count of drives in an uber of the RAID array.