|blkmapd(8)||System Manager's Manual||blkmapd(8)|
The pNFS block layout protocol builds a complex storage hierarchy from a set of simple volumes. These simple volumes are addressed by content, using a signature on the volume to uniquely name each one. The daemon locates a volume by examining each block device in the system for the given signature.
The topology typically consists of a hierarchy of volumes built by striping, slicing, and concatenating the simple volumes. The blkmapd daemon uses the device-mapper driver to construct logical devices that reflect the server topology, and passes these devices to the kernel for use by the pNFS block layout client.
- Display usage message.
- Performs device discovery only then exits.
- Runs blkmapd in the foreground and sends output to stderr (as opposed to syslogd)
- Tells blkmapd where to look for the rpc_pipefs filesystem. The default value is /var/lib/nfs/rpc_pipefs.
RFC 5661 for the NFS version 4.1 specification.
RFC 5663 for the pNFS block layout specification.
Jim Rees <email@example.com>
|11 August 2011|