Red Hat GNBD WITH GLOBAL FILE SYSTEM IN RHEL 4.5 Przewodnik Instalacji Pobierz pdf (Strona 33)

Configuration File Devices

Attribute Description

A numeric value greater than zero specifies deferred failback,

expressed in seconds.

A value of manual specifies that failback can happen only with

operator intervention.

rr_min_io Specifies the number of I/O requests to route to a path before

switching to the next path in the current path group.

fast_io_fail_tmo (Red Hat Enterprise Linux release 5.7 and later) The number

of seconds the SCSI layer will wait after a problem has been

detected on an FC remote port before failing I/O to devices on

that remote port. This value should be smaller than the value of

dev_loss_tmo. Setting this to off will disable the timeout.

dev_loss_tmo (Red Hat Enterprise Linux release 5.7 and later) The number

of seconds the SCSI layer will wait after a problem has been

detected on an FC remote port before removing it from the

system.

flush_on_last_del (Red Hat Enterprise Linux 5.3 and later) If set to yes, the

multipathd daemon will disable queueing when the last path to

a device has been deleted.

product_blacklist Specifies a regular expression used to blacklist devices by

product.

The following example shows a device entry in the multipath configuration file.

# }

# device {

# vendor "COMPAQ "

# product "MSA1000 "

# path_grouping_policy multibus

# path_checker tur

# rr_weight priorities

# }

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 43 44

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Red Hat GNBD WITH GLOBAL FILE SYSTEM IN RHEL 4.5 Przewodnik Instalacji Strona 33