E20-655 Online Practice Questions and Answers

You are supporting a customer's cluster with 3 node pools consisting of 10 S200 nodes, 18 X400 nodes, and 30 NL400 nodes. The customer is going to write a large number of 4MB files to the X400 node pool.

The customer is very concerned about minimizing the amount of overhead. Which setting would be best for minimizing the amount of overhead?

A. N+2:1 or N+2 have the same amount of overhead.

B. N+2:1 will have less overhead.

C. I/O optimization should be set to Random.

D. I/O optimization should be set to Streaming

What are some differences between a Major upgrade and a Minor upgrade of OneFS?

A. Major is a change to either of the first two decimal places of the OneFS version and Minor is a change to either of the last two.

B. Major is a change to one of the first three decimals of the OneFS version while Minor is a change to the last digit.

C. Minor is for code patches and Major is for Maintenance releases.

D. Minor includes core operating system changes and Major is for core operating system changes and new OneFS functionality.

Your customer has installed a series of new nodes, and wishes to remove the old node 12 now that the installation is complete. Which command should be used to perform this task cleanly?

A. isi devices -a smartfail -d 12

B. isi_reformat_node -d 12

C. isi_reimage -d 12

D. isi config > remove 12

What is the purpose of an incremental log gather?

A. To gather only additional log data since the last full gather.

B. To gather each node in sequence incrementally.

C. To gather logs and increment by date.

D. To gather current logs and all past tarballs of logs in order.

What is true about the /var/db/celog/events.db file?

A. It is a sqlite3 file and requires additional tools to be read.

B. It holds events generated only on this local node.

C. It holds a master copy of all cluster events.

D. It holds a listing of only events which have not been canceled or quieted.

Which job engine v2.0 component runs on a node, communicates with the job coordinator and coordinates tasks with the three managers on the cluster?

A. Director

B. Coordinator

C. Managers

D. Workers

What type of information is provided by the "isi status" command?

A. critical events, capacity statistics and usage, hardware status

B. firmware version, memory usage, disk serial number

C. warning events, cluster health, voltage status

D. summarized events, cluster statistics, cluster job status

The SmartConnect Service IP acts as which component of the DNS system?

A. Authoritative Name Server

B. Root Server

C. Recursive Resolver

D. Reverse Lookup Zone

The customer has an information security policy which forbids DNS delegations to Isilon clusters. What should you tell the customer about the consequences of this?

A. SmartConnect relies upon DNS delegation to operate, and other load balancing technologies lack SmartConnect's integration with the cluster.

B. SmartConnect relies upon DNS delegation to operate, but other load balancing technologies can substitute for SmartConnect without disadvantage.

C. SmartConnect can operate normally without DNS delegation by integrating with Isilon supported external load balancing technologies.

D. SmartConnect can operate normally without DNS delegation, but licensed features will not be available to the customer.

A customer reports that their SMBv2 clients are not successfully failing over from one node to another when nodes reboot, even though they licensed and configured SmartConnect.

What should you tell the customer?

A. SMBv2 is a stateful protocol, and will not fail over from node to node without reconnection.

B. SMBv2 will fail over correctly once the customer's SmartConnect installation is configured for dynamic pools.

C. SmartConnect will not handle node failures unless the DNS server has been configured to delegate resolution to the cluster.

D. SmartConnect can handle the node failures but an SMB-aware load balancer will make the transition seamless.