Maximizing OSD Performance with EBOFS

The current and coming generations of large distributed file systems stripe data across large numbers of objectbased storage devices (OSDs). Subsequently, individual OSD workloads tend to exhibit no inter-object locality of reference. Small object sizes reduce OSD efficiency due to disk seek overheads. EBOFS, an extent and B+tree based object file system, allows arbitrarily sized objects and preserves intra-object locality of reference by allocating data contiguously on disk, and maintains high levels of contiguity even over the entire lifetime of a disk’s file system, allowing OSDs to operate more efficiently and distributed file systems to maximize performance.