Difference between revisions of "Multipath"
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↑ https://www.thegeekdiary.com/understanding-the-dm-multipath-configuration-file-etc-multipath-conf/
↑ https://en.wikipedia.org/wiki/Linux_DM_Multipath
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* <code>/etc/multipath.conf</code><ref>https://www.thegeekdiary.com/understanding-the-dm-multipath-configuration-file-etc-multipath-conf/</ref><code>https://manpages.debian.org/unstable/multipath-tools/multipath.conf.5.en.html</code> | * <code>/etc/multipath.conf</code><ref>https://www.thegeekdiary.com/understanding-the-dm-multipath-configuration-file-etc-multipath-conf/</ref><code>https://manpages.debian.org/unstable/multipath-tools/multipath.conf.5.en.html</code> | ||
* <code>/etc/multipath/wwids</code> | * <code>/etc/multipath/wwids</code> | ||
+ | |||
+ | == Configuration file: /etc/multipath.conf <ref>https://en.wikipedia.org/wiki/Linux_DM_Multipath</ref>== | ||
+ | # System level defaults (''defaults''): User can override system level defaults. | ||
+ | # Blacklisted devices (''blacklist''): User specifies the list of devices that is not to be under the control of DM-MPIO. | ||
+ | # Blacklist exceptions (''blacklist_exceptions''): Specific devices to be treated as multipath devices even if listed in the blacklist. | ||
+ | # Storage controller specific settings (''devices''): User specified configuration settings will be applied to devices with specified "Vendor" and "Product" information. | ||
+ | # Device specific settings (''multipaths''): Fine tune the configuration settings for individual LUNs. | ||
+ | |||
+ | |||
== Default multipath.conf configuration == | == Default multipath.conf configuration == |
Revision as of 09:45, 9 December 2019
https://en.wikipedia.org/wiki/Linux_DM_Multipath
multipath -l
multipath -t
-t
Display the currently used multipathd configuration
multipathd show config
- Ubuntu:
multipath-tools
package- Binaries:
multipath
multipathd
mpathpersist
- Binaries:
- RHEL:
device-mapper-multipath
package
Config files:
/etc/multipath.conf
[1]https://manpages.debian.org/unstable/multipath-tools/multipath.conf.5.en.html
/etc/multipath/wwids
Configuration file: /etc/multipath.conf [2]
- System level defaults (defaults): User can override system level defaults.
- Blacklisted devices (blacklist): User specifies the list of devices that is not to be under the control of DM-MPIO.
- Blacklist exceptions (blacklist_exceptions): Specific devices to be treated as multipath devices even if listed in the blacklist.
- Storage controller specific settings (devices): User specified configuration settings will be applied to devices with specified "Vendor" and "Product" information.
- Device specific settings (multipaths): Fine tune the configuration settings for individual LUNs.
Default multipath.conf configuration
RHEL cat /etc/multipath.conf | grep -v "#" | grep . defaults { polling_interval 5 no_path_retry 4 user_friendly_names no flush_on_last_del yes fast_io_fail_tmo 5 dev_loss_tmo 30 max_fds 4096 } blacklist { protocol "(scsi:adt|scsi:sbp)" } devices { device { all_devs yes no_path_retry 4 } }
See also
- EMC
powerpath
- Fibre Channel: SAN, HBA, LUN, WWN, WWPN, LIF,
rescan-scsi-bus.sh
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