[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/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

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40196
Subject: LU-9121 lnet: Add the userspace De-Marshalling API
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: fbefa82d60070381f5cf94aac31b37bd0250f2a9

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40198
Subject: LU-9121 lnet: Add a selection policy
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: b668431f931570364d6c7c8c3e5eb1245a62d235

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40199
Subject: LU-9121 lnet: Delete a selection policy
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: ad07f6e23131f850ed61f6895e67d4c1ea775154

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40193
Subject: LU-9121 lnet: Add the ioctl handler for "add policy"
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 5d141f437dbaadff5dc8da7343518484dce70728

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40183
Subject: LU-9121 lnet: UDSP storage and marshalled structs
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 220a7439fd2bf97bb69a8103e16e02694a32130f

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40194
Subject: LU-9121 lnet: ioctl handler for "delete policy"
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 7307e3530f47469af4f6a9bd1e51b596872c37c7

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40191
Subject: LU-9121 lnet: Add the kernel level Marshalling API
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: fb167b9185ce0301c111f46d81083ab79dc31d9a

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40197
Subject: LU-9121 lnet: Add the userspace Marshalling API
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 43a7950a6762262a713d712d427a80f6305dc1a5

[Gerrit Updater]

Amir Shehata ([e-mail]) uploaded a new patch: https://review.whamcloud.com/40195
Subject: LU-9121 lnet: ioctl handler for get policy info
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: b0159ff10af4bb7cafcf4696b574460402d5bf86