[LU-13] Frequent Client Evictions

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.1.0
• Affects Version/s: Lustre 1.8.6
• Severity: 3
• Bugzilla ID: 23,352

Epic

client eviction

• Assignee: Liang Zhen (Inactive)
• Reporter: Dan Ferber (Inactive)

Description

Local tracking bug for 23352.

Comments

[Build Master (Inactive)]

Integrated in lustre-master-centos5 #180
LU-13 updated patch to fix at_min issue

Oleg Drokin : 16f6533558685185eee78b7f74be03e0ece51005
Files :

• lustre/include/lustre_import.h

[Build Master (Inactive)]

Integrated in lustre-master » client,ubuntu-x86_64 #13
LU-13 updated patch to fix at_min issue

Oleg Drokin : 16f6533558685185eee78b7f74be03e0ece51005
Files :

• lustre/include/lustre_import.h

[Build Master (Inactive)]

Integrated in lustre-master » client,el6-x86_64 #13
LU-13 updated patch to fix at_min issue

Oleg Drokin : 16f6533558685185eee78b7f74be03e0ece51005
Files :

• lustre/include/lustre_import.h

[Build Master (Inactive)]

Integrated in lustre-master » client,el6-i686 #13
LU-13 updated patch to fix at_min issue

Oleg Drokin : 16f6533558685185eee78b7f74be03e0ece51005
Files :

• lustre/include/lustre_import.h

[Build Master (Inactive)]

Integrated in lustre-master » client,el5-x86_64 #13
LU-13 updated patch to fix at_min issue

Oleg Drokin : 16f6533558685185eee78b7f74be03e0ece51005
Files :

• lustre/include/lustre_import.h

[Build Master (Inactive)]

Integrated in lustre-master » client,el5-i686 #13
LU-13 updated patch to fix at_min issue

Oleg Drokin : 16f6533558685185eee78b7f74be03e0ece51005
Files :

• lustre/include/lustre_import.h

[Peter Jones]

Liang

We would like to get this landed for 2.1. Are you able to handle this or shall we reassign? I know that you have other things on your mind atm

Peter

[Christopher Morrone (Inactive)]

Nothing is happening with the patch in http://review.whamcloud.com/306. I just asked Oleg for review to get it attention.

This should be included in 2.1.

[Build Master (Inactive)]

Integrated in reviews-centos5 #408
LU-13 updated patch to fix at_min issue

Christopher J. Morrone : 8d934d614f105ea0984033087e9919e97c888179
Files :

• lustre/include/lustre_import.h

[Christopher Morrone (Inactive)]

The at_min has been a huge help. I am fairly certain that LU-25 is the really the root issue. But at_min clearly is not honored without this patch and needs to be fixed. The fix was landed on 1.8.6, and just needs landing on master.

I've pushed it for landing:

http://review.whamcloud.com/306

[Christopher Morrone (Inactive)]

Patch to fix at_min made it on to one set of servers. It seems to have completely worked around the timeouts and evictions we were seeing. The sysamdins are going to roll it out onto all servers.

I am somewhat suspicious that LU-25 is behind some of the unexpectedly long delays in the client's reply reaching the server.