Re: Which EC-code for 6 servers?

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For performance reasons stay with powers of 2 for k. Any of 2+2 or 4+2 will work with your set-up and tolerate one (!) host failure with continued RW access and two host failures with RO (!) access.

To tolerate 2 host failures with RW access, you need m=3, which is probably a bit much with 6 hosts.

Best regards,
=================
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14

________________________________________
From: Szabo, Istvan (Agoda) <Istvan.Szabo@xxxxxxxxx>
Sent: 10 May 2021 10:35:34
To: ceph-users
Subject:  Which EC-code for 6 servers?

Hi,

Thinking to have 2:2 so I can tolerate 2 hosts loss, but if I just want to tolerate 1 host loss, which one better, 3:2  or 4:1?

Istvan Szabo
Senior Infrastructure Engineer
---------------------------------------------------
Agoda Services Co., Ltd.
e: istvan.szabo@xxxxxxxxx<mailto:istvan.szabo@xxxxxxxxx>
---------------------------------------------------


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