Which of the following statements about SDS software-defined storage in traditional storage in terms of storage management is correct?

• A.The management unit of SDS is changed from the original traditional storage RAID group and LUN group to application virtual machine.
• B.The external management interface of traditional storage is more automated and standardization.
• C.The LUN configuration of SDS is complicated, and it is difficult to modify the configuration.
• D.SDS mainly refers to SAN storage products with complicated management.

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Which of the following products belong to the distributed storage type in software-defined storage?

• A.Nutanix
• B.Ceph
• C.Huawei FusionCube
• D.EMCVIPR

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Which of the following statements about RAID50 is correct?

• A.The disk utilization of RAID50 is (N-M/N (N is the number of RAID member disks, M is the number of subgroups of RAID)
• B.The read and write performance of RAID50 is average.
• C.RAID50 is a two-level combination of RAID5 and RAID0. RAID0 first, then RAID5
• D.RAID50 is extremely reliable and can tolerate up to 4 disk failures.

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Which of the following statement about HPC high-performance computing is wrong?

• A.HPC is supercomputing, which uses computers to research, design products and support complex decisions.
• B.HPC stands for high-performance computing, which refers to a single computer system that uses many processors or a computing system and environment that uses multiple computer clusters for computing purposes.
• C.Early HPC was based on customized computers, dedicated to specific fields such as basic scientific research and national defense strategy. With the development of technology, most high-performance PCs are now built based on the cluster architecture of X86 servers.
• D.HPC computing cluster is mainly composed of computing servers, shared storage, high-speed interconnection equipment, and supporting management software platform software and application software.

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An application consumes a lot of IO resources. In order to improve the read and write performance of the application, what adjustments should be made to the system parameters?

• A.vm.dirty_background radio=20
• B.vm.swampiness=100
• C.vm.dirty_ background radio=5
• D.vm.swapiness=0

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