Amazon Technologies, Inc.

Theodore Allen Carroll

Abhiram Kumar Hare Ram Singh

Michael Anthony Sciscenti

Karthikeyan Natarajan

Christopher Ryan Baker

Hariharan Subramanian

Bruce Twito

Nathaniel Vaughan Langman

John Scumniotales

Nathanial Vaughan Langman

Techniques for continuous lock-minimal checkpointing and recovery with a distributed log-based datastore are described. A continuous, fault-tolerant checkpoint process is run on a node in a cluster in a compute-optimized or memory-optimized manner, thereby checkpointing the in-memory replica state of the node to a durable checkpoint datastore. A node can partially restore its replica state by obtaining checkpoint data, which includes an identifier of a low-water mark in a journal shard. The node can attach to the journal shard using the low-mater mark as the point of attachment, enabling the node to finalize the restoration of the replica state to be current.

Continuous lock-minimal checkpointing and recovery with a distributed log-based datastore

Techniques for multi-stream transactional event processing under ACID semantics in a distributed log-based append-only datastore are described. A transaction coordinator writes events that are part of a transaction to a transaction buffer, where the events can be made visible to clients involved in the transaction while other clients are not aware. Upon committing the transaction, an optimistic concurrency control based technique is utilized to attempt to obtain locks on all events involved in the transaction across one or multiple shards by one or multiple designated writer nodes. When all involved writer nodes indicate that they are able to commit their events, the transaction can be committed.

Multi-stream transactional event processing in a distributed log-based append-only datastore

The present disclosure generally relates to enabling migration of services between a first and second environment, while maintaining a local availability of those servers within the first environment. Specifically, embodiments enable the services to remain locally available with the first environment without modification of operation of clients within the first environment. A migration gateway is provided in the first environment that, on migration of a service from the first to the second environment, can announce availability of the service at the gateway. The gateway can then act as a proxy for the service in the second environment. In one configuration, the gateway adopts an Internet Protocol (IP) address of a server that has been migrated, such that clients may be unaware that migration has occurred.

Coordinated migration of network-accessible services while maintaining service availability in prior environment

An initial set of one or more data stores is selected for storing configuration data of a first client of a configuration discovery service. Configuration data for various items of the client's computing environment are stored at the initial set for a first time period. A configuration item, whose records were being stored at a first data store, is identified as a candidate for a data store change. Storing of at least some configuration data of the item at a different data store is initiated.

Storage management for configuration discovery data

Methods, systems, and techniques for analyzing and managing time series workload data are provided. Example embodiments provide a Data Management and Analysis platform that enables end users to modernize their system configurations to incorporate external services techniques, such as cloud technologies, and to utilize virtualization technologies to host some of their functions in a manner that improves the overall performance of their configurations. This may be particularly useful in an IT environment with many interdependent systems where it is hard to analyze and determine where externally hosted or hybrid (e.g., both remote and local) systems might improve the overall delivery of services and cost to end users.

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Seattle, WA, United States of America

Theodore Allen Carroll