Dell PowerStore 5200T EMC PowerStore Host Configuration Guide - Page 67

Configuring with Device Mapper Multipathing for NVMe, Configuration with PowerPath

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Parameter Description Value devices have it set by their device driver, and the multipath device inherits it from the path devices. NOTE: In PowerStore cluster, the maximum I/O size is 1 MB. PowerStore does not set an optimal transfer size. Configuring with Device Mapper Multipathing for NVMe When configuring NVMe/FC on a Linux host that is connected to PowerStore, also configure DM-multipathing to setup multiple I/O paths between the Linux host and the PowerStore array into a single device over NVMe/FC. When configuring DM-multipathing for PowerStore NVMe/FC devices on the Linux host, configure the multipath settings file /etc/multipath.conf: NOTE: To resolve a known issue described in RedHat Knowledge Article 6298681 (multipathd crashes when...), it is highly recommended to update the device-mapper-multipath package to version 0.4.9-135.el7_9 (or later). ## Use user friendly names, instead of using WWIDs as names. defaults { user_friendly_names yes disable_changed_wwids yes } devices { device { vendor .* product dellemc-powerstore uid_attribute ID_WWN prio ana failback immediate path_grouping_policy "group_by_prio" # path_checker directio path_selector "queue-length 0" detect_prio "yes" fast_io_fail_tmo 15 no_path_retry 3 rr_min_io_rq 1 } ## other devices } Configuration with PowerPath PowerStore supports multipathing using Dell EMC PowerPath on a Linux host. For the most updated information about PowerPath support with PowerStore, see the PowerStore Simple Support Matrix. For details on installing and configuring PowerPath with PowerStore on your host, see Dell EMC PowerPath on Linux Installation and Administration Guide for the PowerPath version you are installing. NOTE: Ensure that the multipath.conf file includes the max_sectors_kb setting if working with iSCSI or Fibre Channel. Configuring Oracle ASM For proper functioning with Linux hosts using Oracle ASM with PowerStore, configure the Oracle ASM settings file. Prerequisites For a PowerStore cluster to function properly with Linux hosts that are using the Oracle ASM volume management software with ASMLib driver, follow these steps to configure the /etc/sysconfig/oracleasm settings file: Host Configuration for Linux 67

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Parameter
Description
Value
devices have it set by their device driver, and the multipath device
inherits it from the path devices.
NOTE:
In PowerStore cluster, the maximum I/O size is 1 MB.
PowerStore does not set an optimal transfer size.
Configuring with Device Mapper Multipathing for NVMe
When configuring NVMe/FC on a Linux host that is connected to PowerStore, also configure DM-multipathing to setup multiple
I/O paths between the Linux host and the PowerStore array into a single device over NVMe/FC.
When configuring DM-multipathing for PowerStore NVMe/FC devices on the Linux host, configure the multipath settings
file
/etc/multipath.conf
:
NOTE:
To resolve a known issue described in
RedHat Knowledge Article 6298681 (multipathd crashes when...)
, it is highly
recommended to update the
device-mapper-multipath
package to version 0.4.9-135.el7_9 (or later).
## Use user friendly names, instead of using WWIDs as names.
defaults {
user_friendly_names yes
disable_changed_wwids yes
}
devices {
device {
vendor .*
product dellemc-powerstore
uid_attribute ID_WWN
prio ana
failback immediate
path_grouping_policy "group_by_prio"
# path_checker directio
path_selector "queue-length 0"
detect_prio "yes"
fast_io_fail_tmo 15
no_path_retry 3
rr_min_io_rq 1
}
## other devices
}
Configuration with PowerPath
PowerStore supports multipathing using Dell EMC PowerPath on a Linux host.
For the most updated information about PowerPath support with PowerStore, see the
PowerStore Simple Support Matrix
.
For details on installing and configuring PowerPath with PowerStore on your host, see
Dell EMC PowerPath on Linux Installation
and Administration Guide
for the PowerPath version you are installing.
NOTE:
Ensure that the multipath.conf file includes the
max_sectors_kb
setting if working with iSCSI or Fibre Channel.
Configuring Oracle ASM
For proper functioning with Linux hosts using Oracle ASM with PowerStore, configure the Oracle ASM settings file.
Prerequisites
For a PowerStore cluster to function properly with Linux hosts that are using the Oracle ASM volume management software
with ASMLib driver, follow these steps to configure the
/etc/sysconfig/oracleasm
settings file:
Host Configuration for Linux
67