Chinaunix

标题: multipath device 的wwid如何得到 [打印本页]

作者: origin2004 时间: 2008-05-14 09:41
标题: multipath device 的wwid如何得到
在使用readhat as 4.5自带的device mapper multipath时,有一个配置文件/var/lib/multipath/binding.是设置multipath device的别名与wwid之间的绑定关系.请问multipath device的wwid是如何生成的.看multipath手册,好象是scsi_id -g -u -s /block/%n生成的,但在命令行中没有实验出来.请帮助.

作者: yddll 时间: 2008-05-14 09:43
把手册内容贴出来大家看看

作者: origin2004 时间: 2008-05-14 09:56
标题: 回复 #1 origin2004 的帖子
MULTIPATH(

Linux Administrator鈥檚 Manual MULTIPATH(

NAME
   multipath - Device mapper target autoconfig

SYNOPSIS
   multipath [options] [device]

DESCRIPTION
   multipath is used to detect multiple paths to devices for fail-over or
   performance reasons and coalesces them

OPTIONS
   -b bindings_file
      specify an alternate location for the user friendly names bind-
      ings file. The default location is /var/lib/multipath/bindings.

   -d    dry run, do not create or update devmaps

   -f    flush a multipath device map specified as parameter, if unused

   -F    flush all unused multipath device maps

   -l    show the current multipath topology from information fetched in
      sysfs and the device mapper

   -ll show the current multipath topology from all available informa-
      tion (sysfs, the device mapper ...)

   -p policy
      force maps to specified policy:

   failover 1 path per priority group

   multibus all paths in 1 priority group

   group_by_serial
         1 priority group per serial

   group_by_prio
         1 priority group per priority  value.  Priori-
         ties are determined by callout programs speci-
         fied as a global, per-controler or  per-multi-
         path option in the configuration file

   group_by_node_name
         1  priority group per target node name. Target
         node names are fetched in /sys/class/fc_trans-
         port/target*/node_name.
   -v level verbosity, print all paths and multipaths

   0          no output

   1          print  the  created or updated multipath names
         only, for use to feed other tools like kpartx

   2 +          print all info  :  detected  paths,  coalesced
         paths (ie multipaths) and device maps

   device update only the devmap the path pointed by device is in.
      device is in the /dev/sdb (as shown by udev in the $DEV-
      NAME variable) or major:minor format.  device may alter-
      natively be a multipath mapname

FILES
   /etc/multipath.conf
      Configuration file for the multipath and multipathd pro-
      grams.

   /var/lib/multipath/bindings
      The  bindings  file used if the user friendly names con-
      figuration option is selected. This file should  usually
      not need to be modified by hand. To ensure That the mul-
      tipath devices have the same names on all nodes  access-
      ing  them,  this file can be copied from one node to all
      the others.

SEE ALSO
   udev(

, dmsetup(

hotplug(

AUTHORS
   multipath was    developed by    Christophe    Varoqui,
   <christophe.varoqui@free.fr> and others.

February 2004    MULTIPATH(

作者: origin2004 时间: 2008-05-14 09:57
标题: 回复 #1 origin2004 的帖子
##
## This is a template multipath-tools configuration file
## Uncomment the lines relevent to your environment
##
#
##
## name  : defaults
## desc  : multipath-tools default settings
##
#defaults {
# #
# # name : udev_dir
# # desc : directory where udev creates its device nodes
# # default : /udev
# #
# udev_dir /dev
#
# #
# # name : polling_interval
# # scope : multipathd
# # desc : interval between two path checks in seconds
# # values  : n > 0
# # default : 5
# #
# polling_interval 10
#
# #
# # name : selector
# # scope : multipath
# # desc : the default path selector algorithm to use
# #          these algorithms are offered by the kernel multipath target
# # values  : "round-robin 0"
# # default : "round-robin 0"
# #
# selector "round-robin 0"
#
# #
# # name : path_grouping_policy
# # scope : multipath
# # desc : the default path grouping policy to apply to unspecified
# #          multipaths
# # values  : failover          = 1 path per priority group
# #          multibus          = all valid paths in 1 priority group
# #          group_by_serial = 1 priority group per detected serial
# #    number
# #       group_by_prio    = 1 priority group per path priority
# #    value
# #       group_by_node_name = 1 priority group per target node name
# # default : failover
# #
# path_grouping_policy multibus
#
# #
# # name : getuid_callout
# # scope : multipath
# # desc : the default program and args to callout to obtain a unique
# #          path identifier. Absolute path required
# # default : /sbin/scsi_id -g -u -s
# #
# getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
#
# #
# # name : prio_callout
# # scope : multipath
# # desc : the default program and args to callout to obtain a path
# #          priority value. The ALUA bits in SPC-3 provide an
# #          exploitable prio value for example. "none" is a valid value
# # default : (null)
# #
# #prio_callout "/bin/true"
#
# #
# # name : path_checker
# # scope : multipath & multipathd
# # desc : the default method used to determine the paths' state
# # values  : readsector0|tur|emc_clariion|hp_sw|directio
# # default : readsector0
# #
# path_checker readsector0
#
# #
# # name : rr_min_io
# # scope : multipath
# # desc : the number of IO to route to a path before switching
# #          to the next in the same path group
# # default : 1000
# #
# rr_min_io 100
#
# #
# # name : rr_weight
# # scope : multipath
# # desc : if set to priorities the multipath configurator will assign
# #       path weights as "path prio * rr_min_io"
# # values  : priorities|uniform
# # default : uniform
# #
# rr_weight priorities
#
# #
# # name : failback
# # scope : multipathd
# # desc : tell the daemon to manage path group failback, or not to.
# #       0 means immediate failback, values >0 means deffered
# #       failback expressed in seconds.
# # values  : manual|immediate|n > 0
# # default : immediate
# #
# failback manual
#
# #
# # name : no_path_retry
# # scope : multipath & multipathd
# # desc : tell the number of retries until disable queueing, or
# #          "fail" means immediate failure (no queueing),
# #          "queue" means never stop queueing
# # values  : queue|fail|n (>0)
# # default : (null)
# #
# no_path_retry  queue
#
# #
# # name : user_friendly_names
# # scope : multipath
# # desc : If set to "yes", using the bindings file
# #          /var/lib/multipath/bindings to assign a persistent and
# #          unique alias to the multipath, in the form of mpath<n>.
# #          If set to "no" use the WWID as the alias. In either case
# #          this be will be overriden by any specific aliases in this
# #          file.
# # values  : yes|no
# # default : no
# user_friendly_names no
#
#}
#
##
## name : blacklist
## scope : multipath & multipathd
## desc : list of device names to discard as not multipath candidates.
##          Devices can identified by either their device node name "devnode"
##          or their WWID "wwid".
## default : cciss, fd, hd, md, dm, sr, scd, st, ram, raw, loop
##
#blacklist {
#    wwid 26353900f02796769
# devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
# devnode "^hd[a-z]"
# devnode "^cciss!c[0-9]d[0-9]*"
#}
#
##
## name : multipaths
## scope : multipath & multipathd
## desc : list of multipaths finest-grained settings
##
#multipaths {
# #
# # name  : multipath
# # scope : multipath & multipathd
# # desc  : container for settings that apply to one specific multipath
# #
# multipath {
# #
# # name  : wwid
# # scope : multipath & multipathd
# # desc  : index of the container
# #
# wwid 3600508b4000156d700012000000b0000
#
# #
# # name : alias
# # scope : multipath
# # desc : symbolic name for the multipath
# #
# alias yellow
#
# #
# # name : path_grouping_policy
# # scope : multipath
# # desc : path grouping policy to apply to this multipath
# # values  : failover          = 1 path per priority group
# #          multibus          = all valid paths in 1 priority
# #    group
# #          group_by_serial = 1 priority group per detected
# #    serial number
# #       group_by_prio    = 1 priority group per path
# #    priority value
# #       group_by_node_name = 1 priority group per target
# #    node name
# # default : failover
# #
# path_grouping_policy multibus
#
# #
# #
# # name : path_selector
# # desc : the path selector algorithm to use for this mpath
# #          these algo are offered by the kernel mpath target
# # values  : "round-robin 0"
# # default : "round-robin 0"
# #
# path_selector "round-robin 0"
#
# #
# # name : failback
# # scope : multipathd
# # desc : tell the daemon to manage path group failback, or
# #       not to. 0 means immediate failback, values >0 means
# #       deffered failback expressed in seconds.
# # values  : manual|immediate|n > 0
# # default : immediate
# #
# failback manual
#
# #
# # name : rr_weight
# # scope : multipath
# # desc : if set to priorities the multipath configurator will
# #       assign path weights as "path prio * rr_min_io"
# # values  : priorities|uniform
# # default : uniform
# #
# rr_weight priorities
#
# #
# # name : no_path_retry
# # scope : multipath & multipathd
# # desc : tell the number of retries until disable queueing,
# #          or "fail" means immediate failure (no queueing),
# #          "queue" means never stop queueing
# # values  : queue|fail|n (>0)
# # default : (null)
# #
# no_path_retry  queue
# }
# multipath {
# wwid 1DEC_____321816758474
# alias red
# rr_weight priorities
# }
#}
#
##
## name  : devices
## scope : multipath & multipathd
## desc  : list of per storage controler settings
##    overrides default settings (device_maps block)
##       overriden by per multipath settings (multipaths block)
##
#devices {
# #
# # name  : device
# # scope : multipath & multipathd
# # desc  : settings for this specific storage controler
# #
# device {
# #
# # name  : vendor, product
# # scope : multipath & multipathd
# # desc  : index for the block
# #
# vendor "COMPAQ  "
# product "HSV110 (C)COMPAQ"
#
# #
# # name : bl_product
# # scope : multipath & multipathd
# # desc : a regular expression used to blacklist devices
# #       by vendor/product. NOTE For a device to get
# #       blacklisted, the vendor, product, and bl_product
# #       strings must all match, not just the vendor and
# #       bl_product strings as in the upstream version.
# # default : (null)
# bl_product "LUN_Z"
#
# #
# # name : path_grouping_policy
# # scope : multipath
# # desc : path grouping policy to apply to multipath hosted
# #          by this storage controler
# # values  : failover          = 1 path per priority group
# #          multibus          = all valid paths in 1 priority
# #    group
# #          group_by_serial = 1 priority group per detected
# #    serial number
# #       group_by_prio    = 1 priority group per path
# #    priority value
# #       group_by_node_name = 1 priority group per target
# #    node name
# # default : failover
# #
# path_grouping_policy multibus
#
# #
# # name : getuid_callout
# # scope : multipath
# # desc : the program and args to callout to obtain a unique
# #          path identifier. Absolute path required
# # default : /sbin/scsi_id -g -u -s
# #
# getuid_callout       "/sbin/scsi_id -g -u -s /block/%n"
#
# #
# # name : prio_callout
# # scope : multipath
# # desc : the program and args to callout to obtain a path
# #          weight. Weights are summed for each path group to
# #       determine the next PG to use case of failure.
# #       "none" is a valid value.
# # default : no callout, all paths equals
# #
# prio_callout       "/sbin/mpath_prio_balance_units %d"
#
# #
# # name : path_checker
# # scope : multipathd
# # desc : path checking alorithm to use to check path state
# # values  : readsector0, tur
# # default : readsector0
# #
# path_checker readsector0
#
# #
# # name : path_selector
# # desc : the path selector algorithm to use for this mpath
# #          these algo are offered by the kernel mpath target
# # values  : "round-robin 0"
# # default : "round-robin 0"
# #
# path_selector "round-robin 0"
#
# #
# # name : failback
# # scope : multipathd
# # desc : tell the daemon to manage path group failback, or
# #       not to. 0 means immediate failback, values >0 means
# #       deffered failback expressed in seconds.
# # values  : manual|immediate|n > 0
# # default : immediate
# #
# failback 30
#
# #
# # name : hardware_handler
# # scope : multipath
# # desc : If set, it specifies a module that will be used to
# #          perform hardware specific actions when switching
# #       path groups or handling IO errors
# # values  : "0"|"1 emc"
# # default : "0"
# #
# hardware_handler "1 emc"
#
# #
# # name : rr_weight
# # scope : multipath
# # desc : if set to priorities the multipath configurator will
# #       assign path weights as "path prio * rr_min_io"
# # values  : priorities|uniform
# # default : uniform
# #
# rr_weight priorities
#
# #
# # name : no_path_retry
# # scope : multipath & multipathd
# # desc : tell the number of retries until disable queueing,
# #          or "fail" means immediate failure (no queueing),
# #          "queue" means never stop queueing
# # values  : queue|fail|n (>0)
# # default : (null)
# #
# no_path_retry  queue
# }
# device {
# vendor "COMPAQ  "
# product "MSA1000       "
# path_grouping_policy multibus
# path_checker tur
# rr_weight priorities
# }
#}

作者: origin2004 时间: 2008-05-14 10:00
标题: 回复 #1 origin2004 的帖子
mpath1 (360a9800043346536534a344a794e6d59)
#左边是别名,右边是wwid

作者: origin2004 时间: 2008-05-14 10:03
标题: 回复 #1 origin2004 的帖子
也看了scsi_id的手册,意思很清楚,就是在命令行中试不出来.

作者: smyjgj 时间: 2011-11-21 10:01
/sbin/scsi_id -g -u -s /block/sdx ，大侠们不屑于这些简单的问题。

欢迎光临 Chinaunix (http://bbs.chinaunix.net/)