Re: About ceph disk slowops effect to cluster

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Is it better?


Istvan Szabo
Staff Infrastructure Engineer
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Agoda Services Co., Ltd.
e: istvan.szabo@xxxxxxxxx<mailto:istvan.szabo@xxxxxxxxx>
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________________________________
From: Phong Tran Thanh <tranphong079@xxxxxxxxx>
Sent: Friday, January 12, 2024 3:32 PM
To: David Yang <gmydw1118@xxxxxxxxx>
Cc: ceph-users@xxxxxxx <ceph-users@xxxxxxx>
Subject:  Re: About ceph disk slowops effect to cluster

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________________________________

I update the config
osd_mclock_profile=custom
osd_mclock_scheduler_background_recovery_lim=0.2
osd_mclock_scheduler_background_recovery_res=0.2
osd_mclock_scheduler_client_wgt=6

Vào Th 6, 12 thg 1, 2024 vào lúc 15:31 Phong Tran Thanh <
tranphong079@xxxxxxxxx> đã viết:

> Hi Yang and Anthony,
>
> I found the solution for this problem on a HDD disk 7200rpm
>
> When the cluster recovers, one or multiple disk failures because slowop
> appears and then affects the cluster, we can change these configurations
> and may reduce IOPS when recovery.
> osd_mclock_profile=custom
> osd_mclock_scheduler_background_recovery_lim=0.2
> osd_mclock_scheduler_background_recovery_res=0.2
> osd_mclock_scheduler_client_wgt
>
>
> Vào Th 4, 10 thg 1, 2024 vào lúc 11:22 David Yang <gmydw1118@xxxxxxxxx>
> đã viết:
>
>> The 2*10Gbps shared network seems to be full (1.9GB/s).
>> Is it possible to reduce part of the workload and wait for the cluster
>> to return to a healthy state?
>> Tip: Erasure coding needs to collect all data blocks when recovering
>> data, so it takes up a lot of network card bandwidth and processor
>> resources.
>>
>
>
> --
> Trân trọng,
>
> ----------------------------------------------------------------------------
>
> *Tran Thanh Phong*
>
> Email: tranphong079@xxxxxxxxx
> Skype: tranphong079
>


--
Trân trọng,
----------------------------------------------------------------------------

*Tran Thanh Phong*

Email: tranphong079@xxxxxxxxx
Skype: tranphong079
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