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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | CONFIGURATION FILE | SEE ALSO | AUTHORS | COLOPHON |
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blkmapd(8) System Manager's Manual blkmapd(8)
blkmapd - pNFS block layout mapping daemon
blkmapd [-h] [-d] [-f]
The blkmapd daemon performs device discovery and mapping for the
parallel NFS (pNFS) block layout client [RFC5663].
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.
-h Display usage message.
-d Performs device discovery only then exits.
-f Runs blkmapd in the foreground and sends output to stderr (as
opposed to syslogd)
The blkmapd daemon recognizes the following value from the [general]
section of the /etc/nfs.conf configuration file:
pipefs-directory
Tells blkmapd where to look for the rpc_pipefs filesystem.
The default value is /var/lib/nfs/rpc_pipefs.
nfs(5), dmsetup(8), nfs.conf(5)
RFC 5661 for the NFS version 4.1 specification.
RFC 5663 for the pNFS block layout specification.
Haiying Tang <Tang_Haiying@emc.com>
Jim Rees <rees@umich.edu>
This page is part of the nfs-utils (NFS utilities) project.
Information about the project can be found at
⟨http://linux-nfs.org/wiki/index.php/Main_Page⟩. If you have a bug
report for this manual page, see
⟨http://linux-nfs.org/wiki/index.php/Main_Page⟩. This page was
obtained from the project's upstream Git repository
⟨http://git.linux-nfs.org/?p=steved/nfs-utils.git;a=summary⟩ on
2018-02-02. (At that time, the date of the most recent commit that
was found in the repository was 2018-01-17.) If you discover any
rendering problems in this HTML version of the page, or you believe
there is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
11 August 2011 blkmapd(8)
Pages that refer to this page: nfs.conf(5)
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