Additional Topics

  1. Bastion host: An AWS bastion host can provide a secure primary connection point as a ‘jump’ server for accessing your private instances via the internet.
    1. Basically bastion host is EC2 running in your public subnet
    2. Allows SSH and RDP only to certain ip ranges
    3. bastion host run in security group that has SSH/RDP permissions to EC2 instances in your Private subnets
    4. You can SSH to bastion using private key and do further SSH to EC2 in private subnet using
      1. Remote Desktop Gateway for windows
      2. Agent forwarding for Linux SSH
  2. Elastic Map Reduce (EMR)
  3. Data Pipeline
  4. Simple Email Service (SES)
  5. Quick Site:
    1. AWS service that will aggregate your data from multiple data sources (S3, DynamoDB, RDS, etc.) and provide business intelligence based on this data.
  6. NAS (Network Attached Storage) EFS (Elastic File System):
    1. An Amazon EFS file system is accessed by EC2 instances running inside one of your VPCs.
    2. Instances connect to a file system by using a network interface called a mount target.
    3. Each mount target has an IP address or DNS (, which AWS assigns automatically or you can specify.
    4. Use linux mount command to mount this to a folder such as /home/mysharedfolder
    5. Cost in .xx US$ per GB/Month units (around 30 cents per GB/hour)
  7. Status Checks
    1. System status check checks the physical host
      1. Examples: Power failure, Network Failure, System software issues, Hardware failure. When this happens, simply stop and restart the VM which will restart it on a different host (hardware)
    2. Instance status check checks the VM/OS
      1. Corrupt memory
      2. Exhausted memory
      3. Misconfigured network
      4. Kernel issues
      5. Reboot will fix
  8. EBS Volume types (16 TB max for all) (burst max 3000 IOPS)
    1. General Purpose SSD: gp2 Can be root/boot volume
      1. General VMs, web servers. Min 1 GB
      2. 3 IOPS/GB max 10,0000 IOPS
    2. Provisioned IOPS SSD: io1 Can be root/boot volume
      1. High volume db server. Min 4 GB
    3. Throughput Optimized HDD:  st1
      1. Can’t be root/boot volume. Min 500 GB
      2. Big data, Data warehousing, Log processing
    4. Cold HDD: sc1 Can’t be root/boot volume
      1. . Min 500 GB
  9. Workplaces
    1. Using AWS WS client one can connect to virtual desktop (windows only)
    2. Workspaces are persistent
    3. data on D drive is backed up every 12 hours
    4. No need to have AWS account
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