To get everything up to a working state, you will need to set your
failure domain to "osd" instead of "host" in the default rule, and as it
has been said before, pool size should be 3 and min_size 2.
With that said, you will eventually need more hosts to get the most out
of ceph.
Den 2025-03-28 kl. 16:05, skrev mihai.ciubancan:
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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