Host Reconfiguration Skipping Redundant Steps in Provider Networks
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Solution Overview
Problem
The existing methods for reconfiguring hosts in provider network environments are inefficient, as they require full rebuild procedures that can take several hours, leading to significant delays between client requests for virtual machine provisioning and actual provisioning time.
Innovation Solution
Implementing a method to evaluate and skip certain steps in the full rebuild procedure based on host selection and rebuild strategy criteria, allowing for quicker reconfiguration of hosts by performing only necessary steps, thereby reducing provisioning delays from several hours to minutes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full rebuild procedure is performed on hosts, then reliability of host configuration is improved, but provisioning time increases significantly
Solution Approach 1:
The full rebuild procedure is segmented into multiple discrete steps (hardware vetting, disk cleaning, software installation, updates, reboot). The system evaluates and selectively executes only the necessary segments based on host status, rather than performing all steps uniformly. This segmentation allows the system to maintain reliability by performing critical steps while skipping redundant ones, thereby reducing provisioning time from several hours to minutes.
Solution Approach 2:
Instead of performing the complete rebuild procedure every time, the system applies partial action by evaluating host status and executing only the necessary subset of rebuild steps. The evaluation criteria determine whether hardware vetting, disk cleaning, software installation, or other steps are actually needed, allowing the system to do just enough to ensure reliability without the excessive time cost of a full rebuild.
2Reliability
If full rebuild procedure is performed on hosts, then service reliability is improved, but service efficiency deteriorates
Solution Approach 1:
The system implements feedback mechanisms by continuously monitoring host status information and using this feedback to dynamically determine the appropriate rebuild strategy. The evaluation criteria assess current host conditions and feed this information back into the decision-making process, allowing the system to adjust the rebuild procedure accordingly. This feedback loop ensures service reliability is maintained while optimizing service efficiency by avoiding unnecessary rebuild steps.
Solution Approach 2:
The rebuild procedure transitions from a static, one-size-fits-all approach to a dynamic, adaptive process. The system dynamically evaluates host status and selects from multiple rebuild strategies (full rebuild, partial rebuild, or no rebuild) based on current conditions. This dynamic approach maintains service reliability by performing necessary steps while dramatically improving service efficiency by adapting to each host's specific needs.
3Reliability
If comprehensive rebuild steps are executed, then host security is improved, but reconfiguration time increases
Solution Approach 1:
The system performs preliminary evaluation of host status before executing rebuild steps. By assessing hardware vetting status, disk cleanliness, software version currency, and other security-relevant conditions in advance, the system can determine which security measures are actually needed. This preliminary action allows the system to maintain host security by executing necessary security-focused steps while skipping redundant ones, thereby reducing reconfiguration time.
4Stability of the object's composition
If all rebuild steps are performed uniformly on all hosts, then consistency of host configuration is improved, but operational complexity increases
Solution Approach 1:
The system changes the parameters of the rebuild operation based on host-specific conditions. Instead of applying a uniform rebuild procedure to all hosts, the system adjusts which steps are executed, in what order, and with what intensity based on evaluated host status parameters. This parameter-based approach maintains configuration consistency by ensuring necessary steps are performed while simplifying operational complexity through automated, condition-based decision-making rather than manual assessment of each host.
Data Source
AI summary
Methods and apparatus for reconfiguring hosts in provider network environments in which hosts are evaluated to determine if steps of a full rebuild can be skipped. The hosts may implement slots of different types for virtual machines (VMs). Upon detecting that slots of a particular type are needed, a host that implements slots of another type may be selected for reconfiguration. The host may be evaluated to determine if one or more steps of a full rebuild can be skipped. The host may then be reconfigured to implement slots of the target type according to results of the evaluation. In at least some reconfigurations, at least one step of a full rebuild procedure is not performed for the respective host. Results of previous reconfigurations may be fed back into the evaluation process and used as one of the criteria for determining if steps can be skipped.