[LU-9121] Multi-Rail: User Defined Selection Policy

• Type: New Feature
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.15.0
• Assignee: Amir Shehata (Inactive)
• Reporter: Amir Shehata (Inactive)

Description

It is sometimes desirable to fine tune the selection of local/remote NIs used for communication. For example currently if there are two networks an o2ib and a tcp network, both will be used. Especially if the traffic volume is low the credits criteria will be equivalent between the nodes, and both networks will be used in round robin. However, the user might want to use one network for all traffic and keep the other network free unless the other network goes down.

User Defined Selection Policies (UDSP) will allow this type of control. 

UDSPs are configured from lnetctl via either command line or YAML config files and then passed to the kernel. Policies are applied to all local networks and remote peers then stored in the kernel. Whenever new peers/peer_nis/local networks/local nis are added they are matched against the rules.

Issue Links

• has to be finished together with: LUDOC-438 LNet UDSP Documentation

Comments

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40202
Subject: LU-9121 lnet: User Defined Selection Policy (UDSP)
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 9b9b8729ce687905b61a3f11018345ec539c49e2

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40200
Subject: LU-9121 lnet: add show udsp command
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 1c2f45bd9578a7f2d2a9df4e7c3d8d74bc51ed52

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40201
Subject: LU-9121 lnet: Add info on udsp to lnetctl man page
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 5596671a24d69e16d06dd9d9866cef930e1d54cc

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40189
Subject: LU-9121 lnet: UDSP handling
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: cf5f7c8dff9d5b24b229226c97f037021bbdb8a8

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40190
Subject: LU-9121 lnet: Apply UDSP on local and remote NIs
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 06255a31e09b44afe9f5eed49c67d6fe6ddb1f45

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40187
Subject: LU-9121 lnet: Select NI/peer NI with highest prio
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 58a20e17bbbca6dd631edfa3db6e4dce02b0034c

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40192
Subject: LU-9121 lnet: Add the kernel level De-Marshalling API
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 202f560085a8b595874e01de9afd3ea66744516a

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40186
Subject: LU-9121 lnet: Preferred gateway selection
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 05875427e4fc9a902a87d83d8e39f26c003ad71e

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40188
Subject: LU-9121 lnet: select best peer and local net
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 6e6a8e25164d2e73cde4a41503364a247e7596d9

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40185
Subject: LU-9121 lnet: foundation patch for selection mod
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: a30e9aaa52e02c7e945f87be47d7bfdf28695592

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40184
Subject: LU-9121 lnet: UDSP liblnetconfig structure def
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 54e7cd8949774f469873412bf783513835717ae8