Broadcom-VMware
2V0-620 · Question #146
2V0-620 Question #146: Real Exam Question with Answer & Explanation
The correct answer is A: Use multiple NICs for the vMotion vmkernel port.. The vMotion quiesce phase is delayed when a VM has a high memory dirty rate; increasing network bandwidth through multiple NICs or a faster NIC reduces the time needed to transfer and synchronize memory pages.
Section 2 – Administer vSphere Resources
Question
An administrator is attempting to migrate a large Hadoop virtual machine using vMotion. The administrator notices a delay when the machine is quiesced. The Hadoop virtual machine is processing many transactions a second to an in-memory database. Which two actions would help reduce the amount of time needed to perform a vMotion on this virtual machine? (Choose two.)
Options
- AUse multiple NICs for the vMotion vmkernel port.
- BUse a 10Gbps Network card for the vMotion vmkernel port.
- CAdd an additional management network to help transmit the data quicker.
- DDisable Fault Tolerance before performing the vMotion.
Explanation
The vMotion quiesce phase is delayed when a VM has a high memory dirty rate; increasing network bandwidth through multiple NICs or a faster NIC reduces the time needed to transfer and synchronize memory pages.
Common mistakes.
- C. The management network handles vCenter-to-host control traffic and has no role in transferring vMotion memory data, so adding a management network does not improve vMotion throughput.
- D. Fault Tolerance prevents vMotion entirely rather than causing a delay - if FT were enabled, the migration attempt described in the question would not be possible at all, not merely slow.
Concept tested. vMotion network bandwidth optimization for high memory workloads
Topics
#vMotion#network bandwidth#NIC teaming#memory copy phase
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