Red Hat DEVICE-MAPPER MULTIPATH 5.2 Manual do Utilizador descarregar pdf (Página 14)

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

6.3.5 Unified Lun (ULP) settings (devices)

The per-device settings here are used when using a DotHill Storage product with Unified Luns.

The important settings for ULP performance are the “path_grouping_policy” and the

“prio_callout” flags. This example is taken from the DotHill R/Evolution 2330, which is an

iSCSI storage array.

devices {

device {

vendor "DotHill"

product "R/Evo 2330-2R"

path_grouping_policy group_by_prio

getuid_callout "/sbin/scsi_id -g -u -s /block/%n"

path_checker tur

path_selector "round-robin 0"

hardware_handler "0"

prio_callout “ /sbin/mpath_prio_alua /dev/%n”

failback immediate

rr_weight uniform

no_path_retry 12

}

6.4 Multipath.conf (Recommended DotHill Storage Settings)

6.4.1 SANnet II

SANnet II - The following are the recommended attributes for the SANnet II arrays specified in

the per-storage-array section:

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Red Hat DEVICE-MAPPER MULTIPATH 5.2 Manual do Utilizador Página 14