Dimension Data CloudControl Storage upgrade programme: Change to Existing Standard/High Performance/Economy Disks in AP3 (Singapore) Effective November 15th
Scheduled maintenance is currently in progress. We will provide updates as necessary.
Posted Nov 15, 2018 - 15:00 UTC
Scheduled
NOTE: For more background, see previous announcement "Dimension Data CloudControl Storage upgrade programme: Change to Standard/High Performance/Economy Disk Speeds in AP3 (Singapore) Effective November 1st” at: https://cloud-status.dimensiondata.com/incidents/yz5mr2rdydj3
Dear Client
As part of our ongoing improvement initiatives, on November 15th we will implement the second stage of the changes to Standard/High Performance/Economy Disk Speeds in AP3 (Singapore). In this stage, we will be making changes to all disks associated with all existing Cloud Servers.
There is no downtime or maintenance associated with this change, hence the enablement will begin outside of the software upgrade window on November 15, 2018 at approximately 11:00 PM Singapore Time (15:00 UTC). The change will take several hours to take effect across all existing Cloud Servers.
Here is a summary of the impacts that should be expected with the second stage
For all EXISTING disks on all Cloud Servers which existed prior to the November 1st change and have not been updated to the new model:
1. Disks will be allowed to burst up the following IOPS limits announced with the November 1st change.
ECONOMY: Greater of 100 IOPS or 0.5 IOPS/GB based on the size of the disk STANDARD: Greater of 500 IOPS or 3 IOPS/GB based on the size of the disk HIGH PERFORMANCE: Greater of 800 IOPS or 6 IOPS/GB based on the size of the disk
Example: A 100 GB Disk using Standard Disk Speed will be assigned a 500 IOPS maximum. A 180 GB Disk using Standard Disk Speed will be assigned 540 IOPS maximum (180 GB x 3 IOPS/GB).
NOTE: When this change is implemented on a given Cloud Server disk, it will take immediate effect. No restart is required.
2. After the change is applied AND the server is restarted or migrates between ESXi hosts, disks will be allowed to burst up to a Throughput limit equal to the IOPS maximum x 16 KB. This limit applies in addition to the above IOPS limit.
Example: A 100 GB Disk using Standard Disk Speed will be assigned an 8,000 KB/second Throughput maximum (500 IOPS x 16 GB). A 180 GB Disk using Standard Disk Speed will be assigned an 8,640 KB/second Throughput maximum (540 IOPS x 16 KB)
NOTE: When this change is implemented on a given Cloud Server disk, it does not take immediate effect if the server is running. Instead, it will take effect on restart of the server and/or when the server migrated between ESXi hosts as part of normal vSphere Distributed Resource Scheduler (DRS) activities.
For more information please refer to the “Introduction to Disk Speeds" section of the following article: