<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>Hi Joel,</div><div><br /></div><div>In my use-case, two-primaries drbd devices are used as the back-end disks of iSCSI respectively,</div><div>then the two iSCSI disks form a multi-path disk.</div><div><br /></div><div>For example, there are two nodes(node-1 and node-2), all of them are primary nodes, suppose there is a drbd <br /></div><div>device called drbd1. Then drbd1 on node-1 is used as a back-end disk of iSCSI target, the peer device on node-2 <br /></div><div>is used as a back-end disk of iSCSI target too. At last, we make these two iSCSI disks into a multi-path disk.<br /></div><div><br /></div><div>Since multi-path may submit writes to two primaries nodes concurrently, conflicting writes will happen and cause</div><div>the drbd become unavailable.<br /></div><div><pre>Best regards,
Xu</pre></div><div><br /></div><br /><br /><br /><div style="position:relative;zoom:1"></div><br /><pre><br />From: Joel Colledge <joel.colledge@linbit.com>
Date: 2022-05-10 19:24:29
To: "rui.xu" <rui.xu@easystack.cn>
Cc: Philipp Reisner <philipp.reisner@linbit.com>,drbd-dev@lists.linbit.com,dongsheng.yang@easystack.cn
Subject: Re: drbd: a proposal of two-primaries mode>Hi Xu,
>
>Could you describe your use case in more detail? What are you trying
>to achieve with DRBD?
>
>This will help understand why you would like to restore the
>functionality. Perhaps there is a simpler solution that also works for
>your purposes.
>
>Best regards,
>Joel
</pre></div><br>