# Change History

Released On | What's New
--- | ---

2021-10-20

This is the nineteenth official release.

- Added Automatic recovery to the product advantages.
- Added the specifications of c4 DeHs and ECS flavors allowed on c4 DeHs.

2019-02-12 | This issue is the eighteenth official release. Modified the following content: Deleted disk-intensive DeH specifications.
2019-02-06 | This issue is the seventeenth official release. Accepted in OTC 4.0.

2019-01-30

This issue is the sixteenth official release.

Added the following content:

- Migrating ECSs
- Tag Management

Modified the following content:

Added s2-medium DeHs.

2018-12-12 | This issue is the fifteenth official release. Accepted in OTC-3.2/Agile-12.2018.

2018-12-10

This issue is the fourteenth official release.

Modified the following content:

- Optimized description of auto placement in Dedicated Host.
- Adjusted the column width of a table in General-Purpose DeHs.
- Rectified spelling and grammatical errors in General-Purpose DeHs, Memory-Optimized DeHs, Allocating DeHs, Managing ECSs on a DeH, and Managing the ECSs on a DeH in Batches.

2018-08-30 | This is the thirteenth official release. Modified the following content: Optimized the strings and pictures.
2018-07-13 | This issue is the twelfth official release. Added the following content: Dedicated General-Purpose DeHs Modified the following content: Modified the memory sizes of DeHs in General-Purpose DeHs, Dedicated General-Purpose DeHs, and Memory-Optimized DeHs.
2018-05-30 | This issue is the eleventh official release. Accepted in OTC 3.1.
2018-05-21 | This issue is the tenth official release. Added the following content: Key Operations Recorded by CTS Modified the following content: Added the formula for calculating the number of required vCPUs in General-Purpose DeHs.
2018-04-30 | This issue is the ninth official release. Added the following content: Memory-Optimized DeHs Modified the following content: Added DeH flavors deh.s2 and deh.c3 in General-Purpose DeHs.
2018-03-30 | This issue is the eighth official release. Added the following content: Modifying Specifications of ECSs on DeHs

2017-12-30

This issue is the seventh official release.

Modified the following content:

- Added v4 CPU in Overview.
- Modified the description about fees of EVS disks and elastic IP addresses in Do I Need to Pay for ECSs Deployed on My DeHs?

2017-10-30 | This issue is the sixth official release. Modified the following content: Modified the description between DeH and AS in Constraints.

2017-09-30

This issue is the fifth official release.

Modified the following content:

- Added six ECS flavors supported by high-performance DeHs in High-Performance DeHs.
- Added a restriction, that is, Automatic recovery of ECSs created on DeHs is not supported in Constraints.

2017-07-30 | This issue is the fourth official release. Modified the following content: Supported the multi-project function in Basic Concepts and Getting Started.
2017-02-06 | This issue is the third official release. Modified the following content: Modified the available vCPU specifications of the general-computing DeHs in General-Purpose DeHs.
2017-02-03 | This issue is the second official release. Modified the following content: Optimized the description about the auto placement function in Dedicated Host.
2017-01-20 | This issue is the first official release.