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Amazon DynamoDB is AWS's fully managed, serverless NoSQL database offering key-value/document storage, change-data capture via Streams, and vector search.
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AWS published a Bedrock AgentCore sample for agents that wake on S3 and scheduled events, capping each agent turn at Lambda's 15-minute timeout. Reviewers can take hours, so the sample stops the agent at every human checkpoint and restarts it from saved state.
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AWS added a SearchVectors API that keeps embeddings in the same table as the data they describe. The second store and the job that feeds it are now optional, and metered three ways.
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JFrog has documented an on-behalf-of exchange so agent calls reach Artifactory as the signed-in user. The price is the Gateway's cached tool search, which per-user discovery gives up.
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Perplexity moved its search serving tier from DynamoDB to CobbleDB, an in-house Rust store, and cut median batch reads from 31.4ms to 5.60ms. The cost case carries to other retrieval teams only at similar payload sizes and request rates.
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AWS says the GetRecord before every PutRecord was burning read capacity and losing concurrent updates. UpdateRecord removes that call, though the post prices nothing and Standard tier feature groups need a new serialization format first.
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A dev.to walkthrough gives a Nova Sonic voice agent and an Amplify AI Kit chat agent one long-term memory in Amazon Bedrock AgentCore Memory, where every record is filed under an actorId and a sessionId. Both channels already had short-term context.
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miruky's console walkthrough puts an order and its outbox event in one DynamoDB transaction, then fails the consumer on purpose to show why redelivery is the consumer's problem. The whole exercise is priced under $5 in us-east-1.
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SQS standard queues and Lambda event source mappings both deliver at least once, and that guarantee is about the envelope. A lab in us-east-1 sent the same 150-real order four times and logged four charges.
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A dev.to test stores each shop's position as a unit-sphere triple and gets ordering that matches haversine to about half a metre across seven places, while the geohash index it was compared against missed the nearest shop.
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A dev.to postmortem traces a 2 AM rollback to per-instance caches and rebuild timers, and the part of the fix that actually crosses instances is a cacheHandler writing invalidation timestamps to shared storage.
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The pattern treats each MCP tool invocation on Amazon Quick as an access event and checks MFA, country, group-to-role mapping and tool permission against claims Entra ID puts in the token. Configuring the identity provider is most of the work.
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DynamoDB's vector search returns at most 100 matches per query against one partition key value. A developer hashed chunk IDs across five shard keys and fanned the query out, then measured what the fan-out cost on a small Lambda.
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New AWS sign-ups federate to a Google, GitHub or Apple login and arrive as a project whose resource permissions are set by the console and by whatever coding agent the owner pastes AWS's setup text into. The rollout covers new customers only.
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Aurora Serverless v2 idles at about $43 a month at its 0.5-ACU floor, close to three times the whole $15 EC2 box being retired, so the read path became a SQLite file in S3 and the writes went to DynamoDB.
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One developer took Nx Plugin for AWS 1.0, the AWS Blocks preview and Amplify Gen 2 to the same file-portal scope, deployed all three against one FSx for ONTAP access point, then deleted everything to see what stayed behind.
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A standard SQS event source mapping climbs toward 1,250 concurrent instances while the default account pool holds 1,000. The setting that would cap it sits on function configuration, at one API call per function to read.
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DynamoDB vector search has been generally available since August 5, 2026. A walkthrough of a serverless search engine shows what a single Lambda actually buys with it, and what choosing 512 dimensions commits a catalogue to.
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A Devico Solutions post splits file ingestion into gate, ingest, extract and derive so a parse retry never repeats an upload, and the synchronous gate rejects bad files in milliseconds by sniffing magic bytes.
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Yvan Saf deployed the same serverless Todo API twice on one AWS account, once bare and once hardened, then attacked both from his own terminal. The bare list route reads the whole DynamoDB table because nothing in the request path knows who is calling.
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Terraform reads an emergency console change as a config mismatch and reverts it on the next scheduled apply. A dev.to writeup builds the CI job that catches it first, and explains why the plan-only role still needs lock writes.
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Build · September 13, 2026 · 1 publisher
Build · September 13, 2026 · 1 publisher
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Build · August 19, 2026 · 1 publisher