Background
ApsaraDB for Memcache (original version) uses distributed cache architecture. It guarantees service reliability but does not guarantee data reliability. When a service node fails you must push the Memcache system in the event of data loss. Because, Memcache does not provide a data persistence policy, which can cause major problems.
To serve our customers better, the Alibaba Cloud ApsaraDB team upgraded ApsaraDB for Memcache (on May 10, 2017) with advanced features including dual-node hot standby, data persistence, and backup recovery. The new Memcache offers you with complete database solutions covering disaster tolerance, recovery, monitoring, migration, and so on, without affecting service reliability.
Product forms comparison
| Module | New Version Memcache | Earlier Version Memcache |
|---|---|---|
| Distributed architecture | Supported | Supported |
| Data persistence guarantee | Supported | Not supported |
| Dual-node hot standby architecture | Supported | Not supported |
| Memcache protocol compatibility | Fully compatible | Fully compatible |
Sales model comparison
The new version has more flexible sales models, and supports both Subscription and Pay-As-You-Go.
| Module | Later Version Memcache | Earlier Version Memcache |
|---|---|---|
| Subscription new purchase | Supported | Not supported |
| Subscription upgrade | Supported | Not supported |
| Subscription renewal | Supported | Not supported |
| Subscription renewal and configuration change | Supported | Not supported |
| Subscription automatic renewal | Supported | Not supported |
| Pay-As-You-Go new purchase | Supported | Supported |
| Pay-As-You-Go configuration change | Supported | Supported |
| Release of Pay-As-You-Go instances | Supported | Supported |
| Changing Pay-As-You-Go to Subscription | Supported | Not supported |
Supported regions
New Memcache supports a wider range of regions, including major international regions and all regions in China.
International regions
| Region | Zone | New Version Memcache | Old Version Memcache |
|---|---|---|---|
| Asia Pacific (Singapore) | Asia Pacific 1 Zone A | Supported | Not supported |
| Japan | Japan Zone A | Supported | Not supported |
| Germany (Frankfurt) | Germany Zone A | Supported | Not supported |
| Southeast Asia Pacific 2 (Sydney) | Australia Zone A | Supported | Not supported |
| Hong Kong (China) | Hong Kong (China) Zone C | Supported | Not supported |
| US East | US East 1 Zone A | Supported | Not supported |
| US (Silicon Valley) | US West 1 Zone B | Supported | Supported |
Regions in mainland China
| Region | Zone | New Version Memcache | Old Version Memcache |
|---|---|---|---|
| East China 1 | East China 1 Zone B | Supported | Supported |
| East China 1 Zone D | Supported | Supported | |
| East China 1 Zone E | Supported | Supported | |
| East China 2 | East China 2 Zone A | Supported | Supported |
| East China 2 Zone B | Supported | Supported | |
| South China 1 | South China 1 Zone A | Supported | Supported |
| South China 1 Zone B | Supported | Supported | |
| North China 1 | North China 1 Zone B | Supported | Supported |
| North China 2 | North China 2 Zone A | Supported | Supported |
| North China 2 Zone B | Supported | Supported | |
| North China 2 Zone C | Supported | Supported |
Functional modules comparison
New Memcache supports more functions, most of which are advanced database functions.
| Categories | Functions | New Version Memcache | Old Version Memcache |
|---|---|---|---|
| Backup recovery | Full backup | Supported | Not supported |
| Backup recovery | Supported | Not supported | |
| Clone instance | Supported | Not supported | |
| Data flow operation | Supported | Simple command lines | |
| Monitoring alarms | Resource monitoring | Supported | Supported |
| Resource alarms | Supported | Supported | |
| Data security | Whitelist | Supported | Not supported |
| VPC | Supported | Supported | |
| Whitelist password-free access | Supported | Supported | |
| Password-free for multiple Memcache instances | Supported | Not supported |
Related FAQs
How can I manage and change the configuration of the earlier version ApsaraDB for Memcache?
A: You can continue managing earlier version ApsaraDB for Memcache instances in Alibaba Cloud console. Activated earlier version instances can be managed, changed in configuration, and released normally.
How can I purchase another earlier version ApsaraDB for Memcache instance?
A: The earlier version ApsaraDB for Memcache no longer supports purchasing new instances. You may only purchase a later version ApsaraDB for Memcache product.
Alibaba Cloud launched single-node ApsaraDB for Memcache in August 2017. The single-node product has the same price as the earlier version ApsaraDB for Memcache does. You can flexibly choose single-node or dual-node product formats to meet diverse business needs.
How can I upgrade an earlier version ApsaraDB for Memcache instance to the new version?
A: Currently ApsaraDB for Memcache does not support one-click upgrade from the earlier version to the new version.
To upgrade Memcache to the new version, you must purchase a new version instance, push data manually, direct your apps to the domain name of the new instance, and then release the earlier version instance.