From mboxrd@z Thu Jan 1 00:00:00 1970 From: Muneendra Kumar M Subject: deterministic io throughput in multipath Date: Mon, 19 Dec 2016 11:50:36 +0000 Message-ID: <1649d4b8538d4b4cb1efacdfe8cf31eb@BRMWP-EXMB12.corp.brocade.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2455925303803120355==" Return-path: Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: "dm-devel@redhat.com" List-Id: dm-devel.ids --===============2455925303803120355== Content-Language: en-US Content-Type: multipart/alternative; boundary="_000_1649d4b8538d4b4cb1efacdfe8cf31ebBRMWPEXMB12corpbrocadec_" --_000_1649d4b8538d4b4cb1efacdfe8cf31ebBRMWPEXMB12corpbrocadec_ Content-Type: text/plain; charset="us-ascii" Customers using Linux host (mostly RHEL host) using a SAN network for block storage, complain the Linux multipath stack is not resilient to handle non-deterministic storage network behaviors. This has caused many customer move away to non-linux based servers. The intent of the below patch and the prevailing issues are given below. With the below design we are seeing the Linux multipath stack becoming resilient to such network issues. We hope by getting this patch accepted will help in more Linux server adoption that use SAN network. I have already sent the design details to the community in a different mail chain and the details are available in the below link. https://www.redhat.com/archives/dm-devel/2016-December/msg00122.html. Can you please go through the design and send the comments to us. Regards, Muneendra. --_000_1649d4b8538d4b4cb1efacdfe8cf31ebBRMWPEXMB12corpbrocadec_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Customers using Linux host (mostly RHEL host) using a SAN net= work for block storage, complain the Linux multipath stack is not resilient= to handle non-deterministic storage network behaviors. This has caused many customer move away to non-linux based serv= ers. The intent of the below patch and the prevailing issues are given belo= w. With the below design we are seeing the Linux multipath stack becoming r= esilient to such network issues. We hope by getting this patch accepted will help in more Linux server adop= tion that use SAN network.

I have already sent the design details to the community in a = different mail chain and the details are available in the below link.

https://www.redhat.com/archives/dm-devel/2016-= December/msg00122.html.

Can you please go through the design and send the comments to= us.  

 

Regards,

Muneendra.

 

 

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