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From: Vladislav Bolkhovitin <vst-d+Crzxg7Rs0@public.gmane.org>
To: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: RDMA power failure write atomicity
Date: Thu, 10 Mar 2016 15:45:56 -0800	[thread overview]
Message-ID: <56E20734.4030208@vlnb.net> (raw)

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
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             reply	other threads:[~2016-03-10 23:45 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-10 23:45 Vladislav Bolkhovitin [this message]
     [not found] ` <56E20734.4030208-d+Crzxg7Rs0@public.gmane.org>
2016-03-11  1:33   ` RDMA power failure write atomicity Asgeir Eiriksson
     [not found]     ` <0E25BAE6-9091-4B28-A2A9-2F41BD97145A-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-03-12  0:26       ` Vladislav Bolkhovitin
     [not found]         ` <56E36247.7060605-d+Crzxg7Rs0@public.gmane.org>
2016-03-12  1:14           ` Anuj Kalia
     [not found]             ` <CADPSxAh-Fn8cHekiXeBa6+1rNDM=N0y5wQHDFtM4BxxH0wjzBg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-12  1:54               ` Vladislav Bolkhovitin

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