>>We need something like tmpfs - running in local memory but support dio. 

Maybe with ramdisk, /dev/ram0  ? 

we can format it with standard filesystem (ext3,ext4,...) so maybe dio works 
with it ?



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

De: "Stefan Priebe - Profihost AG" <s.pri...@profihost.ag> 
À: "Sébastien Han" <han.sebast...@gmail.com> 
Cc: "Mark Nelson" <mark.nel...@inktank.com>, "Alexandre DERUMIER" 
<aderum...@odiso.com>, "ceph-devel" <ceph-devel@vger.kernel.org>, "Mark Kampe" 
<mark.ka...@inktank.com> 
Envoyé: Jeudi 22 Novembre 2012 14:29:03 
Objet: Re: RBD fio Performance concerns 

Am 22.11.2012 14:22, schrieb Sébastien Han: 
> And RAMDISK devices are too expensive. 
> 
> It would make sense in your infra, but yes they are really expensive. 

We need something like tmpfs - running in local memory but support dio. 

Stefan 
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