Sunday, 14 August 2016

AWS EBS Update - More PIOPS:GB Ratio Change and EBS Snapshot Price Reduction - New!

AWS announce the below two new updates for EBS Volumes.
EBS Snapshots Price Reduction
The snapshot prices for Amazon Elastic Block Store (EBS) volumes (including Gateway-Cached volumes that are used with the AWS Storage Gateway) are reduced by 47% in all regions. Snapshots are typically used to capture a point-in-time backup of the data on EBS volumes, and can be used to instantiate multiple new volumes, expand the size of a volume, or move volumes across Availability Zones. Changes to snapshot pricing are retroactive to the beginning of the month “August 1, 2016”, this new price will be reflected in the statement at the end of the month.
Provisioned IOPS (PIOPS)
The maximum IOPS:GB ratio for EBS Provisioned IOPS SSD (io1) volumes has been increased from 30:1 to 50:1 (66% more IOPS with the same capacity). Prior to this change, we can provision up to 3,000 IOPS for a 100 GB volume. Now, we can provision up to 5,000 IOPS for that same volume. Additionally we can now achieve the maximum 20,000 IOPS with a volume as small as 400 GB, rather than 667 GB under 30:1, reducing storage cost along the way.

Watch the AWS Summit New York Keynote with Werner Vogels, CTO of on AWS YouTube channel!
Read AWS blog for more details.

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Monday, 11 July 2016

East-West and North-South Traffic

East-West Traffic: Traffic that flows within the data centre between servers of same data centre is known as East-West Traffic. E.g. Server to Server traffic.
North-South Traffic: Traffic that enters and exits the data centre is known as North-South Traffic. It means the traffic that is going towards the internet and coming from internet is known as North-South Traffic. E.g. Client-Server traffic.


Monday, 4 July 2016

VMware vSphere 6 VMkernel Traffic Types

  • vMotion Traffic: Enables the VMkernel adapter to advertise itself to another host as the network connection where vMotion traffic is sent. The migration with vMotion to the selected host is not possible if the vMotion service is not enabled for any VMkernel adapter on the default TCP/IP stack, or there are no adapters using the vMotion TCP/IP stack.
  • Provisioning Traffic: Handles the data transferred for virtual machine cold migration, cloning, and snapshot creation.
  • Fault Tolerance Traffic: Enables Fault Tolerance logging on the host. You can use only one VMkernel adapter for FT traffic per host.
  • Management Traffic: Enables the management traffic for the host and vCenter Server. Typically, hosts have such a VMkernel adapter created when the ESXi software is installed. You can create another VMkernel adapter for management traffic on the host to provide redundancy.
  • vSphere Replication Traffic: Handles the outgoing replication data that is sent from the source ESXi host to the vSphere Replication server.
  • vSphere Replication NFC Traffic: Handles the incoming replication data on the target replication site.
  • Virtual SAN Traffic: Enables the Virtual SAN traffic on the host. Every host that is part of a Virtual SAN cluster must have such a VMkernel adapter.