- #How to setup multipath switching in 5nine manager how to#
- #How to setup multipath switching in 5nine manager serial#
- #How to setup multipath switching in 5nine manager code#
# using the `no_path_retry' keyword instead. # values : queue_if_no_path = Queue IO if no path is active consider # number of features in the following (possibly empty) list of # desc : The default extra features of multipath devices. # prio_args "timeout=1000 preferredsds=foo" # Most prio functions do not need arguments. # desc : The arguments string passed to the prio function # desc : the default function to call to obtain a path Getuid_callout "/lib/udev/scsi_id -whitelisted -device=/dev/%n" # default : /lib/udev/scsi_id -whitelisted -device=/dev/%n # This parameter is deprecated, superseded by uid_attribute # desc : the default program and args to callout to obtain a unique # desc : the default udev attribute from which the path # group_by_node_name = 1 priority group per target node name # group_by_prio = 1 priority group per path priority
#How to setup multipath switching in 5nine manager serial#
# group_by_serial = 1 priority group per detected serial # multibus = all valid paths in 1 priority group # values : failover = 1 path per priority group # desc : the default path grouping policy to apply to unspecified # based on the amount of outstanding IO to # "service-time 0" = Choose the path for the next bunch of IO # with the least amount of outstanding IO. # "queue-length 0" = Send the next bunch of IO down the path # values : "round-robin 0" = Loop through every path in the path group, # these algorithms are offered by the kernel multipath target # desc : the default path selector algorithm to use # will gradually increase to (4 * polling_interval). # properly functioning paths, the interval between checks # desc : interval between two path checks in seconds. Make sure to read every defaults section attribute comments and change it based on your environment needs.
#How to setup multipath switching in 5nine manager code#
With the internal attributes, described above, and the given example bellow, you will likely be able to create your /etc/nf file by squashing the code blocks bellow. This does not mean the default configuration variables should be used in production: they don’t treat important parameters your storage might need. Multipath is usually able to work out-of-the-box with most common storages. The internal attributes database can be acquired by doing: All the non-declared in nf attributes are taken from multipath-tools internal database and its internal blacklist. If boot from SAN is desired, then the multipath-tools-boot package is also required.Ī very simple /etc/nf file exists, as explained in Device Mapper Multipathing - Configuration session.
#How to setup multipath switching in 5nine manager how to#
Shows how to ignore disks with blacklistsīefore setting up multipath on your system, ensure that your system has been updated and includes the multipath-tools package. This section provides step-by-step example procedures for configuring multipath. Device Mapper Multipathing - Configuration Device Mapper Multipathing - Introduction 2.