Alex_Hunt (http://alexhunt86.wordpress.com) SDRS Interview Questions

Interview Questions SDRS

Ques 1: Can 2 datastores that are part of two differ datacenters be added to a datastore

cluster?

Ques 2: Can we add new datastores to a datastore cluster without incurring any

downtime?

Ques 3: If a datastore is space utilization is above the configured threshold then is the

initial placement of a new VM is possible on such datastore?

Ques 4: What are pre-requisite migrations in terms of SDRS?

Ques 5: What is meant by Max Recursion Depth in SDRS?

Ques 6: What is space utilization ratio difference and what is its default value? What is

the purpose of defining space utilization ratio difference?

Ques 7: Why migrations of powered-off VM is preferred by SDRS for load balancing a

datastore cluster?

Ques 8: What is VM.Observed.Latency in terms of SDRS?

Ques 9: What is meant by Performance Correlated Datastores? How it affects SDRS in generating migrations recommendations?

Ques 10: What is default invocation period for SDRS and why it is not invoked at default

time value for first time when SDRS is enabled on a datastore cluster?

Ques 11: What are the different conditions under which SDRS is invoked?

Ques 12: How does Esxi hosts in a cluster learns what latency is observed by other Esxi

hosts on a given datastore?

Ques 13: How to enable SIOC logging and how we can monitor SIOC logs?

Ques 14: If someone has changed the SIOC log level then which file you will consult to

find out so?

Ques 15: Why it is not considered to be a best practice to group together datastores

coming from different storage arrays in a single datastore cluster?

Ques 16: How SDRS is affected if extended datastores are used in a datastore cluster?

Ques 17: Can we migrate VMs with independent disks using SDRS? If yes then how and if no then why?

Ques 18: How SDRS computes space requirement for a thick and thin provisioned

VMs?

Ques 19: What is mirror drivers and how it works?

Alex_Hunt (http://alexhunt86.wordpress.com) SDRS Interview Questions

Ques 20: What are the types of datamovers which can be used by SDRS?

Ques 21: Why it is recommended to avoid mixing datastores with different block size in

a datastore cluster?

Ques 22: What are the enhancements that was made in SvMotion in vSphere 5.1 as

compared to vSphere 5.0?

Ques 23: What is the max number of simultaneous SvMotion process associated with a

datastore? How to change this value?