EMC EMC Certifications E20-655 Questions & Answers

• Question 41:

  A customer has configured a job to have a high impact level. How will the job engine react to this action?

  A. It will allocate additional resources to the job when it runs.

  B. It will not pause the job for higher priority jobs.

  C. It will preserve the impact level if node load levels are too high.

  D. It will lower the priority level if node load levels are too high.

  Correct Answer: A

• Question 42:

  You have a 6 node cluster consisting of 3 identical S nodes and 3 Identical NL nodes. The S nodes each have 3 SSD drives for metadata acceleration of the data in the S node pool. You SSH into the cluster and login as root. You run the command isi job status and see that a FlexProtect job is currently running.

  What could this indicate?

  A. A disk failure has occurred on the cluster

  B. The NVRAM batteries in one of the nodes have failed

  C. The cluster has lost quorum

  D. Metadata is being migrated from hard drives to SSD drives

  Correct Answer: A

• Question 43:

  What does the job engine do?

  A. It schedules and distributes jobs across the entire cluster.

  B. It ensures that all jobs continue running on an ongoing basis.

  C. It runs jobs from node to node based on the impact level of each job.

  D. It uses the cron daemon on each node to schedule periodic jobs across the cluster.

  Correct Answer: A

• Question 44:

  What is a piece of work delegated by the coordinator to a manager for execution by worker threads?

  A. A task

  B. A phase

  C. A job

  D. An item

  Correct Answer: A

• Question 45:

  How is the job engine's coordinator designated?

  A. The job daemons on each node attempt to lock a file and the one that succeeds becomes the coordinator.

  B. The nodes share performance data with the job daemons and the daemon on the node with the lightest load becomes the coordinator.

  C. The storage administrator selects a node to run the coordinator based on the cluster architecture.

  D. The job daemons generate random numbers, and the one that generates the lowest number becomes the coordinator.

  Correct Answer: A

• Question 46:

  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

  Correct Answer: A

• Question 47:

  In OneFS 7.1 what combination of jobs can be run simultaneously?

  A. One restripe job, one mark job and one of any of the other jobs

  B. Two restripe jobs and two all other jobs

  C. One mark job, two "Protect" jobs, one all other jobs

  D. One high impact job, one medium Impact job, up to three low impact jobs

  Correct Answer: A

• Question 48:

  Your customer has provided CELOG events database from their cluster. Which tools can be used to view this database?

  A. SQLite3 based tools

  B. CSV file tools

  C. XML tools

  D. Standard text editors

  Correct Answer: A

• Question 49:

  What best describes a requirement of the CELOG Master Coalescer node?

  A. The node must be connected to the external network.

  B. The node must have LNN 1

  C. The node performs preliminary analysis of other nodes log files

  D. The node only runs the CELOG service isi_celog_notification

  Correct Answer: A

• Question 50:

  Which condition could make it necessary to reset the CELOG DB?

  A. /var partition is >95% full

  B. Always required as part of an upgrade from OneFS 6.0 to 7.x

  C. The LNN rebooted causing the master coalescer function to move

  D. The master coalescer nodes ext-2 interface was added to a different subnet.

  Correct Answer: A