topic Re: Metadata-Defrag Warning in HPE SimpliVity

Metadata-Defrag Warning

EduardoMoreira — Thu, 30 Jan 2020 17:17:26 GMT

Hello All,

I have had a warning on my cluster of Simplivity.

Does someone know how I can investigate that?

The warning is:

Simplivity metadata-defrag process falling behind. Avg stripe density is low.

Thank you so much.

Re: Metadata-Defrag Warning

AnkiN — Fri, 31 Jan 2020 00:26:28 GMT

Hi @EduardoMoreira

There are several factors that can decrease metadata-stripe density and trigger this alarm.
Reduce the backup frequency or you may remove the old backup.

Please refer to the Page 59 of the below link for the event reference guide which tell more about this event.
https://support.hpe.com/hpesc/public/docDisplay?docId=a00088863en_us

Re: Metadata-Defrag Warning

DaveOb — Fri, 31 Jan 2020 11:01:34 GMT

I would suggest you open a support ticket on this one as the troubleshooting is beyond what can be provided in a forum.

At a guess i suspect your system is making a lot of changes and the internal defrag process is falling behind.Simplivity writes full 8k blocks overtime the data in the 8k blocks gets deleted once it drops below a percentage normally 20% this block is a candidate for defrag a bunch of these partial 8k blocks are then consolidated.

Perhaps the system is generating more partial blocks then the default setttings can accomadate.Run the command sudo dsv-storage-defrag-show --detail hdd the defraggable stripes should be a low figure <1%-2%The error may also be transient as the defrag may have caught up in the interim.

Re: Metadata-Defrag Warning

EduardoMoreira — Fri, 31 Jan 2020 13:40:07 GMT

Hello @DaveOb

Thank you for your quick answer. I will open a support case to check the environment.

Regards.

Re: Metadata-Defrag Warning

NeoAA — Fri, 05 Jun 2020 18:34:06 GMT

SimpliVity 3.7.10: have the same issue here, "SimliVity data§defrag rocess is falling bahind. Avg stripe density is low." shown on the mainly host (hosting 70% of VMs storage P S) on my cluster of 4 nodes ...

what support tell about your case? thank you

Re: Metadata-Defrag Warning

Anonymous — Sun, 14 Mar 2021 21:22:30 GMT

You shouldn't be allowed to mark a thread as solved by telling someone to contact support. Post a solution or leave it open.

Re: Metadata-Defrag Warning

Maxilib — Wed, 28 Apr 2021 13:03:04 GMT

Hi,

Do you resolv your problem ?