[pve-devel] Default cache mode for VM hard drives

[Alexandre DERUMIER]

Hi,
from the drbd doc,

http://www.drbd.org/users-guide/s-disk-flush-support.html

disk flush are supported by drbd, so It should not be a problem with cache=none.


>>What about an option to set default cache mode for a specific storage type (for example "writethrough" for DRBD and "none" for local and others)?

AFAIK, they are no DRBD storage type in proxmox.


----- Mail original ----- 

De: "Stanislav German-Evtushenko" <ginermail at gmail.com> 
À: pve-devel at pve.proxmox.com 
Envoyé: Mardi 18 Novembre 2014 17:02:01 
Objet: [pve-devel] Default cache mode for VM hard drives 



Hello, 


It seems many people who use DRBD doesn't change cache mode and doesn't check DRBD consistency and then blame DRBD or even Proxmox for instability and FS corruptions. 


What about an option to set default cache mode for a specific storage type (for example "writethrough" for DRBD and "none" for local and others)? Or even global default option would be helpful, so we could change it to writethrough or directsync and then use "none" only if we "know what we are doing". 


Best regards, 
Stanislav 

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