[PVE-User] Ceph df

[PVE-User] Ceph df

[Сергей Цаболов]

Hi to all.

I have cluster with  7 pve nodes

After ceph complete to  set the health: HEALTH_OK

I for info  with command check the MAX AVAILABLE  storage :

CLASS  SIZE     AVAIL   USED    RAW USED  %RAW USED
hdd    `106 TiB  96 TiB  10 TiB    10 TiB       9.51
TOTAL  106 TiB  96 TiB  10 TiB    10 TiB       9.51

--- POOLS ---
POOL                               ID  PGS  STORED   OBJECTS USED     
%USED  MAX AVAIL
device_health_metrics      1    1   14 MiB       22   28 MiB             
0     42 TiB
vm.pool                             2  512  2.7 TiB      799.37k    8.3 
TiB   8.95     28 TiB
cephfs_data                      3   32  927 GiB  237.28k 1.8 TiB   
2.11     42 TiB
cephfs_metadata              4   32   30 MiB       28     60 MiB      
0     42 TiB

I understand why is show it like that.

My question is how I can  decrease MAX AVAIL in default pool 
device_health_metrics + cephfs_metadata and set it to vm.pool and 
cephfs_data


Thank you.



Sergey TS
The best Regard

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Re: [PVE-User] Ceph df

[Сергей Цаболов]

Hello Alwin,

In this post 
https://forum.proxmox.com/threads/ceph-octopus-upgrade-notes-think-twice-before-enabling-auto-scale.80105/#post-399654

I read about *target ratio to 1 and call it a day *, in my case I set to 
vm.pool  Target ratio 1 :

ceph osd pool autoscale-status
POOL                                         SIZE TARGET SIZE      RATE  
RAW CAPACITY   RATIO  TARGET RATIO EFFECTIVE RATIO  BIAS  PG_NUM  NEW 
PG_NUM  AUTOSCALE
device_health_metrics          22216k       500.0G   2.0 106.4T  0.0092 
                                                     1.0            8 on
vm.pool                                     2734G             3.0        
106.4T  0.0753        1.0000                                       
0.8180 1.0             512 on
cephfs_data                                    0              2.0        
106.4T  0.0000             0.2000 0.1636   1.0             128         
     on
cephfs_metadata                  27843k         500.0G 2.0        
106.4T  0.0092    4.0              32              on

What you think  I need to set target ratio on cephfs_metadata & 
device_health_metrics?

To pool  cephfs_data I set the target ratio 0.2  .

Or the target ration on vm.pool need not the *1* but more?


*
*

31.01.2022 15:05, Alwin Antreich пишет:
> Hello Sergey,
>
> January 31, 2022 9:58 AM, "Сергей Цаболов"<tsabolov@t8.ru>  wrote:
>> My question is how I can  decrease MAX AVAIL in default pool
>> device_health_metrics + cephfs_metadata and set it to vm.pool and
>> cephfs_data
> The max_avail is calculated by the cluster-wide AVAIL and pool USED, with respect to the replication size / EC profile.
>
> Cheers,
> Alwin
>
Sergey TS
The best Regard

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Re: [PVE-User] Ceph df

[Сергей Цаболов]

Hello,

I read the documentation before. I know this page.

In the part of page placement-groups this part:

*TARGET RATIO*, if present, is the ratio of storage that the 
administrator has specified that they expect this pool to consume 
relative to other pools with target ratios set. If both target size 
bytes and ratio are specified, the ratio takes precedence.

If I understand  right I can set the Ratio =< 2 or 3 and is right ratio 
for this pool? I'am correct?

02.02.2022 07:43, Alwin Antreich via pve-user пишет:
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Sergey TS
The best Regard

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