Linux and object storage devices
Posted Nov 5, 2008 2:01 UTC (Wed) by gdt
Parent article: Linux and object storage devices
OSD isn't really aimed at drives, it's aimed at managed storage devices. At the moment these either need to handle disk blocks, which is pretty low level, or implement a network file system, which is pretty high level. You really want a protocol which allows the managed storage to understand which blocks comprise a file with buying into all of the semantics of file handling. That allows the storage to migrate the file to nearline storage, duplicate the entire file for redundancy, etc.
The protocol is an extension to SCSI not because OSD drives are expected to be common, but because that's the transport above Fiber Channel and iSCSI -- the dominant storage attachment protocols.
to post comments)