[LU-11784] PFL layouts can exceed EA size limits

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Labels: PFL2
• Severity: 3
• Assignee: Patrick Farrell
• Reporter: Patrick Farrell

Description

The current code for limiting layout sizes is not fully updated for PFL.  In particular, some of the limits use LOV_MAX_STRIPE_COUNT and the size of a stripe to fix the maximum layout size.  This breaks down with multiple components.

The overstriping feature in LU-9846 makes it easy to reach high stripe counts, and so makes it more urgent to address this issue.

This ticket is to work out what the actual current limit on EA size is (there are several different ones documented in the code, and Lustre crashes below all of them) and update the layout code to not allow creation of layouts that exceed it.

Issue Links

• is related to: LU-9846 Overstriping - more than stripe per OST per component