For each running virtual machine, the system reserves physical RAM for the virtual machine’s reservation (if any) and for its virtualization overhead. The total
configured memory sizes of all virtual machines may exceed the amount of available physical memory on the host. However, it doesn't necessarily mean memory is overcommitted. Memory is overcommitted when the combined working memory footprint of all virtual machines exceed that of the host memory sizes. Because of the memory management techniques the
ESXi host uses, your virtual machines can use more virtual RAM than there is physical RAM available on the host. For example, you can have a host with 2GB memory and run four virtual machines with 1GB memory each. In that case, the memory is overcommitted. For instance, if all four virtual machines are idle, the combined consumed memory may be well below 2GB. However, if all 4GB virtual
machines are actively consuming memory, then their memory footprint may exceed 2GB and the ESXi host will become overcommitted. Overcommitment makes sense because, typically, some virtual machines are lightly loaded while others are more heavily loaded, and relative activity levels vary over time. To improve memory
utilization, the ESXi host transfers memory from idle virtual machines to virtual machines that need more memory. Use the Reservation or Shares parameter to preferentially allocate memory to important virtual machines. This memory remains available to other virtual machines if it is not in use. ESXi implements various mechanisms such as ballooning, memory sharing, memory compression and
swapping to provide reasonable performance even if the host is not heavily memory overcommitted. An ESXi host can run out of memory if virtual machines consume all reservable memory in a memory overcommitted environment. Although the powered on virtual machines are not affected, a new virtual
machine might fail to power on due to lack of memory. Note: All virtual machine memory overhead is also considered reserved. In addition, memory compression is enabled by default on ESXi hosts to improve virtual machine performance when memory is overcommitted as described in
Memory Compression.
On Huawei FusionCompute, a management IP address must be configured for each DVS to facilitate unified management
FALSE
When the VM is accessed using VNC, the network is no longer required A Docker image is a key component of Docker. It is used to create a Docker container. It can only be read and cannot be modified directly In the KVM, the I/O virtualization performance is poor by using the QEMU. If the Virtio is introduced, the NIC rate can be improved The IMC policy supports hot migration of CPUs of different models from different vendors. This ensures that hosts in the cluster provide the same CPU function set for VMs Virtualization consists of computing virtualization, storage virtualization, and network virtualization, corresponding to cloud hosts, cloud hard disks, and cloud networks in cloud computing Huawei FusionCompute is able to check the usage of global physical resources during VM running, calculate the optimal host for the VM based on the intelligent scheduling algorithm, and enable the VM to run on the optimal host by means of live migration, thereby improving the overall service experience Which of the following statements is correct?
FALSE
When creating a port group on FusionCompute, set VLAN ID to 10. Which of the following statement is incorrect? Which of the following technologies is used to prevent phone harassment and add the phones marked as sales to the blacklist? Which of the following file formats does not support VM creation in FusionCompute Which of the following scenarios is not suitable for improving the memory overcommitment ratio? Which of the following statements about the FusionCompute cluster is correct? In the development history of the Internet, which of the following key milestone events is not related to the emergence and development of cloud computing
TRUE
TRUE
FALSE
TRUE
TRUE
The method of processing the frames sent by the trunk interface is as follows. If the VLAN ID is the same as the default ID and the VLAN ID is allowed to pass through the interface, remove the tag and send the packet The system will change the tag of data frames with a non-VLAN-10 tag that pass through the port group to VLAN 10 and then forward the data frames Security group
.vmdk In commercial scenarios, the memory overcommitment rate has reached 150% A complete cluster should contain computing, storage, and network resources Reconciliation between American network music service providers and media companies
In Huawei FusionCompute, which of the following statement about the IMC function is false? When creating a port group on FusionCompute, set VLAN ID to 0. Which of the following statements is true? Which of the following statements about the relationship between VRM and CAN is correct? Which of the following statements about creating a VM template is incorrect? Which of the following modules is responsible for providing persistent block storage in the OpenStack solution? Which of the following operation for creating port groups in Huawei FusionCompute is false? In Huawei FusionCompute, if a VM is bound to a host, () is affected Which of the following statements about RAID are correct? Which of the following statements about Virtmanager are correct?
Which of the following operation are correct when you add shared storage to multiple hosts on Huawei FusionCompute? Which of the following storage resources need to be added? Which of the following are features of FusionSphere Which of the following statements about KVM virtualization are correct? Which of the following methods can be used to create VMs on Huawei FusionCompute
How can a VM obtain a MAC address on Huawei FusionCompute? Which of the following parameters can be configured for Huawei FusionCompute CPU QoS feature?
In Huawei FusionSphere, the memory and CPU resources used by a VM can only be provided by the same cluster. Therefore, a maximum of computing resources that can be used by a virtual machine cannot exceed a sum of resources available to all hosts in the cluster. Huawei FusionCompute is able to check the
Do not modify the data packets that pass through the port group
Converting a snapshot into a template Cinder
Set the VLAN ID to 5000 Hot migration, DRS
Virt-manager is an open-source KVM VM management tool Virt-manager is a graphical management tool for KVM VMs
NAS IP SAN
Guest OS can be Windows Guest OS can be Linux Host OS can be Linux Manually create use the VM to clone to import the VM use the template to deploy
Quota Reserved Limit FALSE
TRUE
usage of global physical resources during VM running, calculate the optimal host for the VM based on the intelligent scheduling algorithm, and enable the VM to run on the optimal host by means of live migration, thereby improving the overall service experience. FALSE The virtualization technology can improve hardware resource utilization and reduce O&M costs. Cloud computing also has these advantages. Therefore, cloud computing and virtualization technologies are inseparable from each other. Which of the following technologies can be used to describe "Birds of a feather flock together"?
VLAN
The KVM virtualization architecture includes the KVM module, QEMU, and Libvirt. Which of the following statements about these modules is false?
Libvirt +QEMU can form a virtualization solution.