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Go Back   Linux Archive > Redhat > Device-mapper Development

 
 
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Old 01-27-2012, 07:42 PM
Benjamin Marzinski
 
Default multipath: Update multipath.conf man page

Update the multipath.conf man page.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
---
multipath/multipath.conf.5 | 79 ++++++++++++++++++++++++++++++++++++---------
1 file changed, 64 insertions(+), 15 deletions(-)

Index: multipath-tools-120123/multipath/multipath.conf.5
================================================== =================
--- multipath-tools-120123.orig/multipath/multipath.conf.5
+++ multipath-tools-120123/multipath/multipath.conf.5
@@ -82,6 +82,11 @@ maximal interval between two path checks
directory where udev creates its device nodes; default is
.I /dev
.TP
+.B multipath_dir
+directory where the dynamic shared objects are stored; default is system
+dependent, commonly
+.I /lib/multipath
+.TP
.B verbosity
default verbosity. Higher values increase the verbosity level. Valid
levels are between 0 and 6; default is
@@ -141,7 +146,7 @@ Default value is fImultibusfR.
The default program and args to callout to obtain a unique path
identifier. Should be specified with an absolute path. Default value
is
-.I /lib/udev/scsi_id --whitelisted --device=/dev/%n
+.I /lib/udev/scsi_id --whitelisted --replace-whitespace --device=/dev/%n
.TP
.B prio
The name of the path priority routine. The specified routine
@@ -177,17 +182,22 @@ Generate the path priority for Hitachi H
.B random
Generate a random priority between 1 and 10.
.TP 12
-.B weightedpath <hbtl|devname> <regex1> <prio1> <regex2> <prio2> ...
-.I hbtl
-regex can be of SCSI H:B:T:L format Ex: 1:0:.:. , *:0:0:.
-.I devname
-regex can be of device name format Ex: sda , sd.e
+.B weightedpath
Generate the path priority based on the regular expression and the
-priority provided as argument.
+priority provided as argument. requires prio_args keyword.
.TP
Default value is fBnonefR.
.RE
.TP
+.B prio_args
+Arguments to pass to to the prio function. Currently only used with
+.I weighted, which needs a value of the form
+.I "<hbtl|devname> <regex1> <prio1> <regex2> <prio2> ..."
+.I hbtl
+regex can be of SCSI H:B:T:L format Ex: 1:0:.:. , *:0:0:.
+.I devname
+regex can be of device name format Ex: sda , sd.e
+.TP
.B features
Specify any device-mapper features to be used. Syntax is
.I num list
@@ -238,19 +248,33 @@ Default value is fIdirectiofR.
.RE
.TP
.B failback
-Tell the daemon to manage path group failback, or not to. 0 or
-.I immediate
-means immediate failback, values >0 means deferred failback (in
-seconds).
-.I manual
-means no failback. Default value is
-.I manual
+Tell multipathd how to manage path group failback.
+.RS
+.TP 12
+.B immediate
+Immediately failback to the highest priority pathgroup that contains
+active paths.
+.TP
+.B manual
+Do not perform automatic failback.
+.TP
+.B values > 0
+deferred failback (time to defer in seconds)
+.TP
+Default value is fImanualfR.
+.RE
.TP
.B rr_min_io
The number of IO to route to a path before switching to the next in
-the same path group. Default is
+the same path group. This is only for BIO based multipath. Default is
.I 1000
.TP
+.B rr_min_io_q
+The number of IO requests to route to a path before switching to the
+next in the same path group. This is only for request based multipath.
+Default is
+.I 1
+.TP
.B rr_weight
If set to fIprioritiesfR the multipath configurator will assign
path weights as "path prio * rr_min_io". Possible values are
@@ -280,6 +304,13 @@ be overriden by any specific aliases in
Default is
.I no
.TP
+.B flush_on_last_del
+If set to
+.I yes
+, multipathd will disable queueing when the last path to a device has been
+deleted. Default is
+.I no
+.TP
.B max_fds
Specify the maximum number of file descriptors that can be opened by multipath
and multipathd. This is equivalent to ulimit -n. A value of fImaxfR will set
@@ -413,12 +444,20 @@ section:
.TP
.B prio
.TP
+.B prio_args
+.TP
.B failback
.TP
+.B rr_weight
+.TP
+.B flush_on_last_del
+.TP
.B no_path_retry
.TP
.B rr_min_io
.TP
+.B rr_min_io_q
+.TP
.B features
.RE
.PD
@@ -446,6 +485,10 @@ subsection recognizes the following attr
.B product_blacklist
(Optional) Product strings to blacklist for this vendor
.TP
+.B alias_prefix
+(Optional) The user_friendly_names prefix to use for this
+device type, instead of the default "mpath"
+.TP
.B hardware_handler
(Optional) The hardware handler to use for this device type.
The following hardware handler are implemented:
@@ -483,6 +526,8 @@ section:
.TP
.B prio
.TP
+.B prio_args
+.TP
.B features
.TP
.B failback
@@ -493,9 +538,13 @@ section:
.TP
.B rr_min_io
.TP
+.B rr_min_io_rq
+.TP
.B fast_io_fail_tmo
.TP
.B dev_loss_tmo
+.TP
+.B flush_on_last_del
.RE
.PD
.LP

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