From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vladislav Bolkhovitin Subject: RDMA power failure write atomicity Date: Thu, 10 Mar 2016 15:45:56 -0800 Message-ID: <56E20734.4030208@vlnb.net> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org Hello, I'm currently considering to use NVDIMM behind RDMA and wonder what is RDMA power failure write atomicity? I mean, what is minimal size and alignment guaranteed to be written atomically in face of power failure (or some other similar failure), i.e. either written in full, or not written at all? For memory writes on Intel it is 8 bytes with 8 bytes alignment. Is there anything like this for RDMA? Or different vendors/implementation have so different expectations and promises, so you can not assume anything >1 byte? I can't find such info anywhere. Thanks, Vlad -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html