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Feature #4103

closed

space map object blocksize should be increased

Added by Christopher Siden about 8 years ago. Updated almost 8 years ago.

Status:
Closed
Priority:
Normal
Category:
zfs - Zettabyte File System
Start date:
2013-09-04
Due date:
% Done:

100%

Estimated time:
Difficulty:
Medium
Tags:
needs-triage
Gerrit CR:

Description

Feature request by George Wilson:

The space map object blocksize is currently 4K which has several implications:

1). 4K sector devices will not see any compression benefit
2). large space_maps require more metadata on-disk
3). large space_maps require more time to load (typically random reads)

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