Hot Upgrade
The HotPlug feature supports hot upgrades, allowing the CPU core count and memory capacity of the cloud host to be upgraded during operation. That is, both CPU and memory support online upgrade expansion. During the upgrade process, the cloud host does not need to be shut down or restarted, and the hot upgrade operation will not affect the performance of applications and services running on the host.
Applicable Scenarios
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In the initial stage of business launch, if users cannot accurately assess the required configuration of the cloud host, they can first apply for a server of ordinary specifications, and then adjust the CPU and memory configuration size of the cloud host through hot upgrade operations later.
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When users encounter a sudden increase in business pressure, they can directly upgrade the CPU core count and memory size of the cloud host through hot upgrades while expanding the number of cloud hosts in parallel.
Limitations
The current SurferCloud hot upgrade operation has the following limitations:
- Machine type: Only General N and High Frequency C support hot upgrades; the Quick Series cloud host does not support it temporarily.
- Base image:
Currently, only some image versions in the base image support hot upgrade operations.
| Support Status | |
|---|---|
| CentOS | Supports CentOS 7.0 64-bit and above |
| Ubuntu | Supports Ubuntu 16.04 64-bit and above |
| Windows | Hot upgrade operation is not supported yet |
| Debian | Supports Debian 9.0 64-bit and above |
| RedHat | Hot upgrade operation is not supported yet |
| Rocky | Hot upgrade operation is not supported yet |
- Limitations on Hot Upgrade:
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CPU: The upper limit for hot upgrading is four times the initial CPU core count of the cloud host. For example, if the cloud host configuration is 2 cores and 2G at the time of purchase, the hot upgrade operation only supports upgrading to a maximum of 8 cores. If you need to upgrade to a larger configuration, please use the "Change Configuration" operation in the management console, that is, offline upgrade method to expand.
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Memory: Only one level of upward hot upgrade is supported for memory. Also, when choosing to upgrade the CPU, the memory capacity also needs to be upgraded in sync with the selected CPU core count. For example, when the current cloud host configuration is 2 cores and 2G, memory hot upgrade only supports upgrading to 4G. If you need to upgrade to a larger configuration, please use the "Change Configuration" operation in the management console, that is, offline upgrade method to expand.
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Billing
The hot upgrade feature is a free host feature and does not incur additional charges.
