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Bug #8491

uberblock on-disk padding to reserve space for smoothly merging zpool checkpoint & MMP in ZFS

Added by Serapheim Dimitropoulos about 2 years ago. Updated about 2 years ago.

Status:
Closed
Priority:
Normal
Category:
zfs - Zettabyte File System
Start date:
2017-07-13
Due date:
% Done:

100%

Estimated time:
Difficulty:
Medium
Tags:
needs-triage

Description

The zpool checkpoint feature in DxOS added a new field in the uberblock.

The Multi-Modifier Protection Pull Request from ZoL adds two new fields in the uberblock (Reference: https://github.com/zfsonlinux/zfs/pull/6279).

As these two changes come from two different sources and once upstreamed and deployed will introduce an incompatibility with each other we want
to upstream a change that will reserve the padding for both of them so integration goes smoothly and everyone gets both features.

History

#1

Updated by Electric Monk about 2 years ago

  • % Done changed from 0 to 100
  • Status changed from New to Closed

git commit 79c2b812ee2010ebf20fdd92dc5f06b59000a94c

commit  79c2b812ee2010ebf20fdd92dc5f06b59000a94c
Author: Serapheim Dimitropoulos <serapheim@delphix.com>
Date:   2017-07-22T00:27:52.000Z

    8491 uberblock on-disk padding to reserve space for smoothly merging zpool checkpoint & MMP in ZFS
    Reviewed by: Matthew Ahrens <mahrens@delphix.com>
    Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
    Reviewed by: Olaf Faaland <faaland1@llnl.gov>
    Approved by: Gordon Ross <gwr@nexenta.com>

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