Question : An online HadoopExam.com exam starts at AM. All the participants will do an I/O on a standard EBS backed instance at AM. How can the user initially achieve a higher I/O performance when the EBS is not pre-warmed? 1. Use the ELB to distribute the load on EBS 2. The user should access all the blocks of data before the exam in advance 3. Access Mostly Uused Products by 50000+ Subscribers 4. The user should select the instance with a higher size to avoid an initial low I/O
Explanation: There is a 5 to 50 percent reduction in IOPS when the user first accesses each block of data on a newly created or restored EBS volume. The user can avoid this performance hit by accessing each block in advance or pre-warm the Amazon EBS volumes.
Explanation: Provisioned IOPS volumes are designed to meet the needs of I/O-intensive workloads, particularly database workloads that are sensitive to storage performance and consistency in random access I/O throughput. A provisioned IOPS volume can range in size from 10 GB to 1 TB and the user can provision upto 4000 IOPS per volume. The ratio of IOPS provisioned to the volume size requested can be a maximum of 30; for example, a volume with 3000 IOPS must be at least 100 GB.
Question : You are creating a GB PIOPS volume. What is the minimum IOPS the user should provision to meet the AWS suggested PIOPS / volume size ratio? 1. 1000 2. 2000 3. Access Mostly Uused Products by 50000+ Subscribers 4. 3000
Explanation: Provisioned IOPS volumes are designed to meet the needs of I/O-intensive workloads, particularly database workloads that are sensitive to storage performance and consistency in random access I/O throughput. A provisioned IOPS volume can range in size from 10 GB to 1 TB and the user can provision up to 4000 IOPS per volume. The ratio of IOPS provisioned to the volume size requested can be a maximum of 30; for example, a volume with 3000 IOPS must be at least 100 GB.
Select the correct statement for Amazon VPC 1. When you create a VPC, it automatically create an DHCP option "domain-name-servers=AmazonProvidedDNS" and associate it with the VPC. 2. DHCP does not automatically associates the DNS Server, for the instances that need to communicate over the VPC's internet gateway. 3. Access Mostly Uused Products by 50000+ Subscribers 4. Only 1 and 3 are correct 5. All 1,2 and 3 are correct.
1. The key of a local secondary index consists of a hash key and a range key. 2. For each hash key, the total size of all indexed items must be 10 GB or less. 3. Access Mostly Uused Products by 50000+ Subscribers 4. When you query a local secondary index, you can choose either eventual consistency or strong consistency. 5. The hash key of the index is the same attribute as the hash key of the table. The range key can be any scalar table attribute.