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Feature #21366

tools/ceph-objectstore-tool: split filestore directories offline to target hash level

Added by Zhi Zhang 10 months ago. Updated 7 days ago.

Status:
Pending Backport
Priority:
Normal
Assignee:
-
Category:
Administration/Usability
Target version:
-
Start date:
09/12/2017
Due date:
% Done:

0%

Source:
Community (dev)
Tags:
Backport:
luminous
Reviewed:
Affected Versions:
Component(RADOS):
objectstore-tool

Description

Currently ceph-objectstore-tool can only split dirs that already meet the usual object number criteria. It won't reduce the cost of online split for those dirs that would meet the criteria online.

Following PR uses 'arg1' option for apply-layout-settings to specify the target hash level wants to split to. Then dirs will be split offline no matters how many objects they have. This also helps those pools that forgot to do pre-splitting at their creation time.

For example,

sudo ceph-objectstore-tool --data-path /data/lib/ceph/osd/ceph-0/ --op apply-layout-settings --pool "cephfs_data" --arg1 5

This will split all "cephfs_data" pool's PGs on OSD.0 offline to the 5th hash level no matter how many objects each dir has right now, to avoid potential costly online split.


Related issues

Copied to RADOS - Backport #24845: luminous: tools/ceph-objectstore-tool: split filestore directories offline to target hash level New

History

#2 Updated by Josh Durgin 7 days ago

  • Project changed from Ceph to RADOS
  • Category changed from OSD to Administration/Usability
  • Status changed from New to Pending Backport
  • Backport set to luminous
  • Component(RADOS) objectstore-tool added

#3 Updated by Nathan Cutler 7 days ago

  • Copied to Backport #24845: luminous: tools/ceph-objectstore-tool: split filestore directories offline to target hash level added

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