Discover how to resolve storage contention issues in a Cisco UCS environment by deploying iSCSI storage with Fabric Interconnect appliance ports, ensuring dedicated bandwidth and QoS for optimal database performance.
Table of Contents
Question
A storage administrator receives reports of network delays when database software attempts to access the storage array. The virtual machines that host the database software are installed on different rack servers connected to the Cisco UCS Fabric Interconnect domain. The existing SAN switches are connected to the Fabric Interconnects using two 8 Gb port-channel interfaces to connect the storage array. The storage administrator has decided to deploy iSCSI storage with four 10 Gbps interfaces connected to the Cisco UCS Fabric Interconnects.
Which deployment type resolves the problems with storage contention?
A. iSCSI storage with Cisco UCS Fabric Interconnect in the virtual port-channel mode
B. iSCSI storage with Cisco UCS Fabric Interconnect using an appliance port
C. iSCSI storage appliance on Cisco UCS Fabric Interconnect uplink trunk port
D. iSCSI storage appliance on Cisco UCS Fabric Interconnect in the storage end-host mode
Answer
B. iSCSI storage with Cisco UCS Fabric Interconnect using an appliance port
Explanation
In a Cisco UCS environment, the appliance port mode is specifically designed for connecting storage devices, such as iSCSI storage arrays, to the Fabric Interconnects. This mode provides dedicated bandwidth and Quality of Service (QoS) capabilities for storage traffic, ensuring optimal performance and minimizing contention with other network traffic.
By deploying the iSCSI storage with four 10 Gbps interfaces connected to the Cisco UCS Fabric Interconnects using the appliance port mode, the storage administrator can effectively resolve the reported network delays and storage contention issues. The appliance port mode separates the storage traffic from other data traffic, preventing potential bottlenecks and ensuring that the database software can access the storage array efficiently.
Additionally, the appliance port mode offers features like Enhanced Transmission Selection (ETS) and Data Center Bridging Capability Exchange (DCBX), which further optimize the storage traffic flow and prioritize it over other types of traffic, ensuring low latency and high throughput for the mission-critical database workloads.
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