Enhanced Control and Flexibility: AWS Unveils Advanced Sharing and Targeting for EC2 Capacity Reservations in Cluster Placement Groups
Seattle, WA – August 12, 2025 – Amazon Web Services (AWS) today announced a significant enhancement to its Amazon Elastic Compute Cloud (EC2) offerings with the introduction of new sharing and targeting capabilities for EC2 On-Demand Capacity Reservations (CRs) specifically designed for cluster placement groups. This update empowers customers with greater control and flexibility when managing their critical compute workloads, particularly those requiring tightly coupled instances for high-performance computing (HPC), machine learning (ML), and other demanding applications.
Historically, AWS customers could reserve EC2 instance capacity in specific Availability Zones to ensure availability for their applications. With the introduction of cluster placement groups, AWS provided a further layer of optimization by enabling instances to be placed in close proximity within a single Availability Zone, minimizing network latency and maximizing throughput. However, the ability to share these reservations across different AWS accounts and to precisely target specific instances within these highly available and performant groups was an area where customers sought further advancement.
The newly unveiled features address this need directly. Customers can now share their On-Demand Capacity Reservations within cluster placement groups across multiple AWS accounts within their organization. This is particularly beneficial for large enterprises with distinct teams or business units that require access to guaranteed capacity for their cluster-based workloads. Instead of managing separate reservations for each account, a central AWS account can now reserve capacity and then share it granularly with other accounts, simplifying capacity management and ensuring consistent availability for all relevant teams.
Furthermore, the update introduces enhanced targeting capabilities. This allows customers to more precisely direct their reserved capacity to specific instances launched within their cluster placement groups. This level of control is invaluable for applications where specific instance configurations or launch attributes need to be guaranteed within the reserved capacity. For instance, a customer running a complex HPC simulation might need to ensure that their reserved capacity is always allocated to instances with specific CPU architectures, memory configurations, or attached storage, all within the context of their tightly networked cluster.
Key Benefits of the New Features:
- Simplified Cross-Account Capacity Management: Centralized reservation management for distributed teams and business units, reducing operational overhead.
- Guaranteed Capacity for Mission-Critical Workloads: Ensures consistent availability of compute resources for applications demanding low latency and high throughput within a cluster.
- Precise Instance Targeting: Allows customers to align reserved capacity with specific instance requirements within their cluster placement groups.
- Cost Optimization: By sharing reservations and ensuring optimal utilization, customers can potentially reduce their overall EC2 spend.
- Increased Flexibility for HPC and ML: Provides the granular control needed for advanced compute workloads that rely on close instance proximity and guaranteed resources.
This advancement underscores AWS’s commitment to providing robust and adaptable infrastructure solutions that meet the evolving needs of its customers. By offering more sophisticated control over EC2 capacity, particularly within the context of cluster placement groups, AWS empowers organizations to build, deploy, and scale their most demanding applications with greater confidence and efficiency.
Customers can now leverage these new capabilities to optimize their resource allocation, streamline their operations, and unlock new levels of performance for their critical workloads. This is a welcome development for any organization that relies on the proximity and guaranteed availability offered by cluster placement groups and seeks to extend these benefits across their organization.
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Amazon published ‘New Sharing and Targeting Capabilities for EC2 On-Demand Capacity Reservations in Cluster Placement Groups’ at 2025-08-12 07:00. Please write a detailed article about this news in a polite tone with relevant information. Please reply in English with the article only.