You probably have to change the existing crush rule to use OSD as
failure domain instead of host. But if you have only one host, why not
set up some other file storage with (software) raid or something?
Zitat von "mihai.ciubancan" <mihai.ciuban...@eli-np.ro>:
The problem is that I have only one host, and the host doesn't have
a RAID controller...I have set as Anthone suggested, but nothing
changed.Mihai
-------- Original message --------From: Eugen Block <ebl...@nde.ag>
Date: 3/28/25 3:47 PM (GMT+02:00) To: Mihai Ciubancan
<mihai.ciuban...@eli-np.ro> Cc: ceph-users@ceph.io Subject:
[ceph-users] Re: space size issue You have the autoscaler enabled,
but it stuck changing the pg_num. The default replicated_rule
(which you are using) requires as many hosts as your pool size is,
so in your case 2. (If you value your data, don't use replicated
pools with size 2.)You could make it work with only one host (as
Anthony suggested with osd_crush_chooseleaf_type 0), but you don't
any real resiliency. I recommend to reconsider your setup.Zitat von
Mihai Ciubancan <mihai.ciuban...@eli-np.ro>:> Hi Eugen,>> Thanks for
your answer. Please find below the output of the command:>> ceph osd
pool ls detail> pool 1 '.mgr' replicated size 2 min_size 1
crush_rule 0 object_hash > rjenkins pg_num 1 pgp_num 1
autoscale_mode on last_change 323 flags > hashpspool,nearfull
stripe_width 0 pg_num_max 32 pg_num_min 1 > application mgr
read_balance_score 12.50> pool 2 'cephfs.cephfs.meta' replicated
size 2 min_size 1 crush_rule > 0 object_hash rjenkins pg_num 16
pgp_num 1 pgp_num_target 16 > autoscale_mode on last_change 295
lfor 0/0/54 flags > hashpspool,nearfull stripe_width 0
pg_autoscale_bias 4 pg_num_min 16 > recovery_priority 5 application
cephfs read_balance_score 12.50> pool 3 'cephfs.cephfs.data'
replicated size 2 min_size 1 crush_rule > 0 object_hash rjenkins
pg_num 129 pgp_num 1 pg_num_target 512 > pgp_num_target 512
autoscale_mode on last_change 326 lfor 0/0/54 > flags
hashpspool,nearfull,bulk stripe_width 0 application cephfs >
read_balance_score 12.50>>> How can I decrese the number of
pg_num?>> Best,> Mihai>>> On 2025-03-28 13:19, Eugen Block wrote:>>
Do you use size 1 for your data? You know that's bad, right?
Please>> share 'ceph osd pool ls detail'.>> Also, it's recommended
to use a power of 2 for pg_num, so you should>> decrease the pg_num
for the pool cephfs.cephfs.data.>>>> Zitat von Mihai Ciubancan
<mihai.ciuban...@eli-np.ro>:>>>>> Hi Anthony,>>> Thanks for the
answer:>>>>>> The output of 'ceph osd df' is:>>>>>> ceph osd df
tree>>> ID CLASS WEIGHT REWEIGHT SIZE RAW USE DATA
OMAP >>> META AVAIL %USE VAR PGS STATUS TYPE
NAME>>> -1 167.64825 - 168 TiB 12 TiB 12 TiB
100 MiB >>> 27 GiB 156 TiB 7.13 1.00 - root
default>>> -3 167.64825 - 168 TiB 12 TiB 12
TiB 100 MiB >>> 27 GiB 156 TiB 7.13 1.00 -
host >>> sto-core-hpc01>>> 0 ssd 13.97069 1.00000 14 TiB
32 MiB 4.1 MiB 12 KiB >>> 28 MiB 14 TiB 0 0
0 up osd.0>>> 1 ssd 13.97069 1.00000 14 TiB
12 TiB 12 TiB 6 KiB >>> 26 GiB 2.0 TiB 85.53 12.00
129 up osd.1>>> 2 ssd 13.97069 1.00000 14
TiB 32 MiB 4.1 MiB 12 KiB >>> 28 MiB 14 TiB 0
0 0 up osd.2>>> 3 ssd 13.97069 1.00000 14
TiB 1.7 GiB 258 MiB 100 MiB >>> 1.3 GiB 14 TiB 0.01
0.00 16 up osd.3>>> 4 ssd 13.97069 1.00000
14 TiB 32 MiB 4.1 MiB 12 KiB >>> 28 MiB 14 TiB
0 0 0 up osd.4>>> 5 ssd 13.97069
1.00000 14 TiB 32 MiB 4.1 MiB 12 KiB >>> 28 MiB 14
TiB 0 0 0 up osd.5>>> 6 ssd
13.97069 1.00000 14 TiB 32 MiB 4.1 MiB 12 KiB >>> 28
MiB 14 TiB 0 0 0 up osd.6>>> 7 ssd
13.97069 1.00000 14 TiB 32 MiB 4.1 MiB 12 KiB >>> 28
MiB 14 TiB 0 0 0 up osd.7>>> 8 ssd
13.97069 1.00000 14 TiB 68 MiB 4.8 MiB 12 KiB >>> 63
MiB 14 TiB 0 0 1 up osd.8>>> 9 ssd
13.97069 1.00000 14 TiB 32 MiB 4.1 MiB 12 KiB >>> 28
MiB 14 TiB 0 0 0 up osd.9>>> 10
ssd 13.97069 1.00000 14 TiB 32 MiB 4.1 MiB 12 KiB >>>
28 MiB 14 TiB 0 0 0 up osd.10>>> 11
ssd 13.97069 1.00000 14 TiB 68 MiB 4.8 MiB 12 KiB >>>
63 MiB 14 TiB 0 0 1 up
osd.11>>> TOTAL 168 TiB 12 TiB 12 TiB
100 MiB >>> 27 GiB 156 TiB 7.13>>>>>> So all the date is on
osd.1>>>>>> But I have checked the balancer and seems active:>>>
ceph balancer status>>> {>>> "active": true,>>>
"last_optimize_duration": "0:00:00.000368",>>>
"last_optimize_started": "Fri Mar 28 10:55:06 2025",>>> "mode":
"upmap",>>> "no_optimization_needed": false,>>>
"optimize_result": "Some objects (0.500000) are degraded; try >>>
again later",>>> "plans": []>>> }>>>>>> But the output of the
commnad 'ceph config dump|grep balancer' >>> gives me
nothing.>>>>>> Best,>>> Mihai>>>>>> On 2025-03-27 23:06, Anthony
D'Atri wrote:>>>> Look at `ceph osd df`. Is the balancer
enabled?>>>>>>>>> On Mar 27, 2025, at 8:50 AM, Mihai Ciubancan
>>>>> <mihai.ciuban...@eli-np.ro> wrote:>>>>>>>>>> Hello,>>>>>>>>>>
My name is Mihai, and I have started using CEPH this mount for a
>>>>> HPC cluster.>>>>> When was lunch in the production the
available space shown was >>>>> 80TB now is 16TB and I didn't do
anything, while I'm having 12 >>>>> OSD (SSD of 14TB):>>>>>>>>>>
sudo ceph osd tree>>>>> ID CLASS WEIGHT TYPE
NAME STATUS REWEIGHT PRI-AFF>>>>> -1
167.64825 root default>>>>> -3 167.64825 host
sto-core-hpc01>>>>> 0 ssd 13.97069
osd.0 up 1.00000 1.00000>>>>> 1 ssd
13.97069 osd.1 up 1.00000 1.00000>>>>>
2 ssd 13.97069 osd.2 up 1.00000
1.00000>>>>> 3 ssd 13.97069 osd.3 up
1.00000 1.00000>>>>> 4 ssd 13.97069
osd.4 up 1.00000 1.00000>>>>> 5 ssd
13.97069 osd.5 up 1.00000 1.00000>>>>>
6 ssd 13.97069 osd.6 up 1.00000
1.00000>>>>> 7 ssd 13.97069 osd.7 up
1.00000 1.00000>>>>> 8 ssd 13.97069
osd.8 up 1.00000 1.00000>>>>> 9 ssd
13.97069 osd.9 up 1.00000 1.00000>>>>>
10 ssd 13.97069 osd.10 up 1.00000
1.00000>>>>> 11 ssd 13.97069 osd.11 up
1.00000 1.00000>>>>>>>>>> sudo ceph df detail>>>>> --- RAW STORAGE
--->>>>> CLASS SIZE AVAIL USED RAW USED %RAW USED>>>>>
ssd 168 TiB 156 TiB 12 TiB 12 TiB 7.12>>>>> TOTAL 168
TiB 156 TiB 12 TiB 12 TiB 7.12>>>>>>>>>> --- POOLS
--->>>>> POOL ID PGS STORED (DATA) (OMAP)
OBJECTS >>>>> USED (DATA) (OMAP) %USED MAX AVAIL QUOTA
OBJECTS QUOTA >>>>> BYTES DIRTY USED COMPR UNDER COMPR>>>>>
.mgr 1 1 705 KiB 705 KiB 0 B 2
>>>>> 1.4 MiB 1.4 MiB 0 B 0 8.1 TiB
N/A >>>>> N/A N/A 0 B 0 B>>>>>
cephfs.cephfs.meta 2 16 270 MiB 270 MiB 0 B 85.96k
>>>>> 270 MiB 270 MiB 0 B 0 16 TiB
N/A >>>>> N/A N/A 0 B 0 B>>>>>
cephfs.cephfs.data 3 129 12 TiB 12 TiB 0 B 3.73M
>>>>> 12 TiB 12 TiB 0 B 42.49 16 TiB
N/A >>>>> N/A N/A 0 B 0 B>>>>>>>>>>
While on the client side I have this:>>>>>>>>>> $ df -h>>>>>
10.18.31.1:6789:/ 21T 13T 8.1T 61%
/data>>>>>>>>>> I don't know where it's gone all the space that was
at the beginning.>>>>> Someone has any hint?>>>>>>>>>> Best
regards,>>>>> Mihai>>>>>
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