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Readyon Builds Four Layer Tenant Isolation for Multi Tenant Amazon EKS
ReadyOn has detailed a four-layer tenant isolation architecture for its Harmony platform on Amazon EKS. The design combines Kubernetes namespaces, dedicated Karpenter node pools, VPC security groups, and per-tenant Aurora databases, with controls evaluated against a 10-stage multi-tenant threat model focused on cross-tenant access and lateral movement.
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Wiz Discloses CosmosEscape, and Practitioners Debate What Customers Could Have Done
Wiz Research disclosed CosmosEscape, a chain that escaped Azure Cosmos DB's Gremlin sandbox and reached a platform-wide key granting read and write access to every database on the service. Microsoft blocked the entry point within two days but took until July 2026 to remove the key. Practitioners debated shared responsibility and what that rearchitecture actually cost.
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Instacart Scales Personalized Marketing via Configuration-Driven Multi-Tenant Platform
Instacart redesigned its personalized marketing system using a configuration-driven multi-tenant architecture on Storefront Pro. The system replaces retailer-specific implementations with a shared execution engine, enabling scalable personalization, faster configuration propagation in under a minute, and 99.9% delivery success across hundreds of retail banners through a unified campaign platform.
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Multi-Tenant Data Architecture
The 2nd installment in a series of articles for creating Software as a Service, "Multi-Tenant Data Architecture" is now available from the Microsoft Architecture Strategy Team on MSDN.