E20-555 Free Practice Test

Which process is used to protect file system structures against corruption through 32-bit CRC checksums?

1. A. Media Scan
2. B. Isilon Data Integrity
3. C. File System Journal
4. D. Dynamic Sector Repair

Correct Answer: B

What do you need to take into consideration when planning a job schedule?

1. A. Any three other jobs can run at the same time and they can run in conjunction with restripe or mark job phases.
2. B. Multiple restripe category job phases and one-mark category job phase can run at the same time.
3. C. Up to three jobs can run at the same tim
4. D. Multiple restripe or mark job phases can safely and securely run simultaneously without interfering with each other and without risk of data corruption.
5. E. Up to three jobs can run at the same tim
6. F. Multiple restripe or mark job phases cannot safely and securely run simultaneously without interfering with each other and without risk of data corruption.

Correct Answer: A

Your customer's initial use case was Home Directories. They implemented the cluster with four 1Gbps ports and LACP. They are planning to expand their cluster to support their core file services. They plan to upgrade their network infrastructure to 10 GbE to facilitate this.
What are two design impacts this change will have?

1. A. Maximum performance is obtained by only using a single 10GbE interface per node.LACP and multiple links may be used to increase redundancy, but will not provide more overall performance to the system
2. B. LACP and multiple links may be used to increase redundancy, but will not provide more overall performance to the system.FCoE should be considered for the External Network Ports on the nodes.
3. C. Dual 10GbE ports on each node will enable throughput of 20Gbps.Only connect half of the nodes to the network.
4. D. Maximum performance is obtained by only using a single 10GbE interface per node.Isilon can support up to 400MB/s per node

Correct Answer: A

An Isilon customer expressed an interest in more effectively managing their storage. Specifically, they would like to plan for future growth.
Which tool would allow the customer to forecast capacity requirements?

1. A. InsightIQ
2. B. Isilon SNMP MIB
3. C. SyncIQ
4. D. SmartPools

Correct Answer: A

What is the minimum number of connected and available nodes required to maintain quorum in a 25-node Isilon cluster?

1. A. 10
2. B. 12
3. C. 13
4. D. 17

Correct Answer: C