[LU-9436] DNE2 - performance improvement with wide stripping directory Created: 02/May/17  Updated: 19/Jul/21

Status: Open
Project: Lustre
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Improvement Priority: Minor
Reporter: Jinshan Xiong (Inactive) Assignee: WC Triage
Resolution: Unresolved Votes: 0
Labels: llnl

Issue Links:
Related
is related to LU-6864 DNE3: Support multiple modify RPCs in... Resolved
is related to LU-11999 DNE performance improvement Resolved
is related to LU-13287 DNE2 - Shared directory performance d... Resolved
Rank (Obsolete): 9223372036854775807

 Description   

For DNE2, when the stripe count of a directory exceeds 16, metadata performance declined significantly. The number is reported from 20k IOPS to double digit IOPS.

 Comments   
Comment by Cory Spitz [ 22/Oct/18 ]

jinshan, were you measuring all ops or just certain ops?  Is the problem related to striped directory inheritance (-D option)?

Comment by Cory Spitz [ 04/Jun/21 ]

I suppose we should reevaluate this one after LU-6864 is completed.

Comment by James A Simmons [ 06/Jun/21 ]

The patch for LU-6864 has been revived. I'm currently running scaling test to see what impact its doing.

Comment by Cory Spitz [ 19/Jul/21 ]

simmonsja, any news on your performance testing?

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