Red Hat DEVICE-MAPPER MULTIPATH 5.2 Instrukcja Użytkownika Pobierz pdf (Strona 29)

DotHill – Linux Device Mapper Multipath “How To” for Storage Revision 4

# #

# # 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,

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Red Hat DEVICE-MAPPER MULTIPATH 5.2 Instrukcja Użytkownika Strona 29