Hello everyone!
My team and I are having trouble getting a 3-Way Synchronous mirror setup on our new storage enclosures from Dell. We are feeding the iSCSI storage to 4x vmware vsphere 7.0U1 hosts
We are currently stable with 2-Way Sync. When we attempt a full-sync of the 3rd SAN we immediately begin experiencing performance issues on the sync partner. We also begin receive error logs indicating underlying storage taking longer than expected and partner node taking longer than expected to respond. For example
"command "WRITE". Request execution time is longer than expected. Response time is 13 sec."
The 3 storage nodes consist of the following hardware
The Starwind host is a Dell Poweredge r740xd with Windows Server 2016 Datacenter
The storage enclosure is a Dell Powervault ME4084 with 56x 12TB 7200RPM SAS drives
The iSCSI Network is 2x 10GbE Mellanox ConnectX-4 LX and Dell S4048-ON switches
The Sync Network is 2x 40GbE Mellanox ConnectX-4 and Dell S6010-ON switches
I have attached a diagram of the hardware setup.
Any help would be greatly appreciated, I am happy to send more information and system logs if needed
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