Re: c-states and OSD performance

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



I’ve seen C-states impact mons by dropping a bunch of packets — on nodes that were lightly utilized so they transitioned a lot.  Curiously both CPU and NIC generation seemed to be factors, as it only happened on one cluster out of a dozen or so.

If by SSD you mean SAS/SATA SSDs, then the question is kinda broad, but probably.  With HDD OSDs I suspect not.

> On Jan 26, 2024, at 7:35 PM, Christopher Durham <caduceus42@xxxxxxx> wrote:
> 
> Hi,
> The following article:
> https://ceph.io/en/news/blog/2024/ceph-a-journey-to-1tibps/
> 
> suggests that dsabling C-states on your CPUs (on the OSD nodes) as one method to improve performance. The article seems to indicate that the scenariobeing addressed in the article was with NVMEs as OSDs.
> 
> Questions:
> Will disabling C-states and keeping the processors at max power state help performance for the following:
> 1. NVME OSDs (yes)2. SSD OSDs3. Spinning disk OSDs
> 
> -Chris
> 
> _______________________________________________
> ceph-users mailing list -- ceph-users@xxxxxxx
> To unsubscribe send an email to ceph-users-leave@xxxxxxx
_______________________________________________
ceph-users mailing list -- ceph-users@xxxxxxx
To unsubscribe send an email to ceph-users-leave@xxxxxxx




[Index of Archives]     [Information on CEPH]     [Linux Filesystem Development]     [Ceph Development]     [Ceph Large]     [Ceph Dev]     [Linux USB Development]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [xfs]


  Powered by Linux