1. A method comprising: organizing a storage array of solid state drives (SSDs) coupled to a node as at least one redundant array of independent disks (RAID) group; organizing data and metadata on the SSDs in a sequential log-structured layout, the data stored as extents of a logical unit (LUN) served by the node; gathering the extents to form at least one stripe written as a write operation that spans all of the SSDs in the RAID group; and controlling a frequency and a size of the write operation to sustain a streaming bandwidth to the SSDs and to override garbage collection in the SSDs.