[PVE-User] New Disk on one node of Cluster.

[Eneko Lacunza]

Hi Sergey,

So, does this really make sense? If you put the new 2 disks in node7 in 
a pool, that data won't be able to survive node7 failure.

If you're trying to benchmark the disks, that wouldn't be a good test, 
because in a real deployment disk IO for only one VM would be worse (due 
to replication and network latencies).

What IOPS are you getting in your 4K tests? You won't get near direct 
disk IOPS...

Did you try with multiple parallel VMs? Aggregate 4K results should be 
much better :)

Cheers

El 16/2/22 a las 10:24, Сергей Цаболов escribió:
>
> Hi Eneko,
>
> 16.02.2022 11:58, Eneko Lacunza пишет:
>> Hi Sergey,
>>
>> El 16/2/22 a las 9:52, Сергей Цаболов escribió:
>>>
>>> I have 7 node's PVE Cluster + Ceph storage
>>>
>>> In 7 node I add new 2 disks and want to make specific new osd pool 
>>> on Ceph.
>>>
>>> Is possible with new  disk create specific pool ?
>>
>> You are adding 2 additional disk in each node, right?
> No, I add the new disk on node 7, not on each node of cluster.
>>
>> You can assign them to a new pool, creating custom crush rules.
>
> Yes this I know how is make new rules
>
> In one node I for test added 2 ssd disk and make the new rules|
> |
>
> |ceph osd crush rule create-replicated replicated_ssd default host 
> ssd  and with this rule I  make new pool vm.ssd
> |
>>
>> Why do you want to use those disks for a different pool? What disks 
>> do you have now, and what disk are the new? (for example, are all HDD 
>> or SSD...)
>
> I want make new pool with HDD - SAS for specific storage of some 
> Windows Server VM.
>
> In existing pools :
>
> vm.pool  base pool for VM disks
> cephfs_data  some disks and ISO and other datas
> vm.ssd   new pool I make from 2 ssd disk
>
> I try to test the Windows Server disk speed for Read/Write and RND4K 
> Q32T1 with CrystalDiskMark 8.0.4x64
>
> If I configure the VM disk to Sata and SSD emulation,Cache: Write back 
> and Discard, Speed write/read is very good  something like :
>
> SEQ1M Q8T1 1797.43/1713.07
>
> SEQ1M Q1T1 1790.77/1350.55
>
> but the RND4K Q32T1 and RND4K Q1T1 is not good, very small.
>
> After the test I think if I add 2 new disks,  configure is for 
> specific pool maybe my speed for  RND4K Q32T1 and RND4K Q1T1 maybe 
> they will get better
>
> Thank you
>
>>
>> Cheers
>>
>> Eneko Lacunza
>> Zuzendari teknikoa | Director técnico
>> Binovo IT Human Project
>>
>> Tel. +34 943 569 206 |https://www.binovo.es
>> Astigarragako Bidea, 2 - 2º izda. Oficina 10-11, 20180 Oiartzun
>>
>> https://www.youtube.com/user/CANALBINOVO
>> https://www.linkedin.com/company/37269706/

Eneko Lacunza
Zuzendari teknikoa | Director técnico
Binovo IT Human Project

Tel. +34 943 569 206 |https://www.binovo.es
Astigarragako Bidea, 2 - 2º izda. Oficina 10-11, 20180 Oiartzun

https://www.youtube.com/user/CANALBINOVO
https://www.linkedin.com/company/37269706/