NFS SAN for Proxmox VE 4.1 dataset record size?

[sdinet]

Does anyone know what I should set the NFS v3 dataset record size to on Proxmox? Also, where would I configure this setting? I know that VMware's hypervisor requests data using 64k blocks, but what is the kvm/qemu default, and is it possible to alter these settings?

I found some old documentation about NFSv3 here: http://nfs.sourceforge.net/nfs-howto/ar01s05.html
Basically it says that 64K is the biggest you can go.

 

[manu]

It looks like this document is a bit outdated. According to the nfs man page, read and write sblock size can go up to one MB.
This is determined after a client-server negociation process, and you can read the current value by inspecting /proc/mounts

I would not change this value expect if you have serious benchmarking data ( bonnie++, fio) proving that the current auto negociated value is causing performance issue.