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Bug #57650

mon-stretch: reweighting an osd back to original causes uneven weights

Added by Kamoltat (Junior) Sirivadhna 4 months ago. Updated 4 months ago.

Status:
In Progress
Priority:
Normal
Category:
Stretch Clusters
Target version:
-
% Done:

0%

Source:
Tags:
Backport:
Regression:
No
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Component(RADOS):
Pull request ID:
Crash signature (v1):
Crash signature (v2):

Description

Reweight an osd from 0.0900 to 0.7000
and then reweight back to 0.0900. Causes uneven weights between
two zones reported by root. Although, each zone says its correct weight.

According to root: zone iris is 11796 and zone pze is 11795.

    {
            "id": -1,
            "name": "default",
            "type_id": 11,
            "type_name": "root",
            "weight": 23591,
            "alg": "straw2",
            "hash": "rjenkins1",
            "items": [
                {
                    "id": -5,
                    "weight": 11796,
                    "pos": 0
                },
                {
                    "id": -7,
                    "weight": 11795,
                    "pos": 1
                }
            ]
        },

        {
            "id": -5,
            "name": "iris",
            "type_id": 9,
            "type_name": "zone",
            "weight": 11796,
            "alg": "straw2",
            "hash": "rjenkins1",
            "items": [
                {
                    "id": -9,
                    "weight": 5898,
                    "pos": 0
                },
                {
                    "id": -10,
                    "weight": 5898,
                    "pos": 1
                }
            ]
        },
      {
            "id": -7,
            "name": "pze",
            "type_id": 9,
            "type_name": "zone",
            "weight": 11796,
            "alg": "straw2",
            "hash": "rjenkins1",
            "items": [
                {
                    "id": -11,
                    "weight": 5898,
                    "pos": 0
                },
                {
                    "id": -12,
                    "weight": 5898,
                    "pos": 1
                }
            ]
        },

History

#1 Updated by Kamoltat (Junior) Sirivadhna 4 months ago

ceph osd tree:

ID   CLASS  WEIGHT   TYPE NAME            STATUS  REWEIGHT  PRI-AFF
 -1         0.35997  root default                                  
 -5         0.17999      zone iris                                 
 -9         0.09000          host node-2                           
  0    hdd  0.09000              osd.0        up   1.00000  1.00000
-10         0.09000          host node-3                           
  1    hdd  0.09000              osd.1        up   1.00000  1.00000
 -7         0.17998      zone pze                                  
-11         0.09000          host node-4                           
  2    hdd  0.09000              osd.2        up   1.00000  1.00000
-12         0.09000          host node-5                           
  3    hdd  0.09000              osd.3        up   1.00000  1.00000

#2 Updated by Kamoltat (Junior) Sirivadhna 4 months ago

  • Description updated (diff)

#3 Updated by Radoslaw Zarzynski 4 months ago

  • Status changed from New to In Progress

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