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S3 Egress Fees: Why Downloading Your Own Data Costs So Much

Cross-posted from the Runsite blog . You put a few hundred gigabytes of images on object storage, glance at the pricing page, and the numbers look friendly: storage is a couple of dollars a month, basically a rounding error. Then the first real invoice arrives and it's a hundred and something. Nothing about how much you're storing changed. The line that blew up isn't storage at all. It's egress — the charge for data leaving the bucket — and it's the part of the bill nobody shops on. Why the storage bill blows up after the first invoice The pricing page wasn't lying to you. Object storage genuinely is cheap to sit on. On AWS S3 , standard storage runs about $0.023 per GB per month at the time of writing, so a hundred gigabytes of assets costs you around two dollars and change to keep. That's the number you compare when you're choosing where to put your files. The number you don't compare is egress: the fee for moving data out of the provider's network. It doesn't show up when you upload, and it doesn't show up while the files just sit there. It shows up every time someone downloads something — roughly $0.09 per GB to the internet once you're past a small free allowance (about the first 100 GB a month on AWS). Individually those are tiny fractions of a cent. The trouble is you're not billed once. You're billed per download, and a popular file gets downloaded a lot. Where egress hides Egress is data transfer out: every byte that leaves the provider's network. The reason it surprises people is that it isn't a single line you can point at. It's a multiplier that quietly attaches itself to things you'd never think of as "downloading": Serving assets to users. Every image, video, PDF, or download your app hands to a visitor is egress. One 4 MB hero image on a page that gets a million views a month is four terabytes of transfer out, from a single file. CDN origin pulls. Putting a CDN in front of your bucket helps, but it isn't free. Every cache miss means the CDN fetches th

2026-08-19 原文 →
AI 资讯

RDS High Availability and credential rotation without downtime

I got an AWS question and implemented it to make sure that the option is correct. A critical financial application runs on RDS for PostgreSQL. The requirements are tight: 1-second RPO, 60-second RTO, and database credentials rotated every 30 days without taking the application offline. Two independent problems. Two independent solutions. Prerequisites Check these before running terraform apply : RDS Proxy availability RDS Proxy is not available on all instance types. It requires instances with at least 2 vCPUs. db.t3.micro is not supported. db.t3.medium and above work. Terraform executor permissions The IAM principal running Terraform needs, at minimum: rds:CreateDBInstance rds:CreateDBProxy rds:CreateDBProxyTargetGroup rds:RegisterDBProxyTargets rds:ModifyDBInstance iam:CreateRole iam:AttachRolePolicy iam:PutRolePolicy iam:PassRole secretsmanager:CreateSecret secretsmanager:PutSecretValue secretsmanager:RotateSecret lambda:CreateFunction lambda:AddPermission ec2:CreateSecurityGroup ec2:AuthorizeSecurityGroupIngress ec2:CreateDBSubnetGroup AdministratorAccess on the account covers all of these. Lock it down after the initial setup. VPC requirements RDS Proxy runs inside your VPC. You need at least two private subnets in different Availability Zones. The rotation Lambda also runs inside the VPC so it can reach the RDS instance directly during the credential update step. The problem Database failure recovery RPO of 1 second means almost no data loss is acceptable. RTO of 60 seconds means the application must resume within a minute of a failure. A standard single-instance RDS setup fails both requirements: there is no automatic failover, and restoring from a backup takes far longer than 60 seconds. Credential rotation Rotating credentials on a schedule sounds simple until you factor in application downtime. If you update a password and the application still holds connections authenticated with the old one, those connections fail. The rotation mechanism needs to handle

2026-08-19 原文 →
AI 资讯

How to Build an AI Agent That Asks Permission First (Nuxt + AI SDK 7)

Introduction I did something stupid. I built a superhero-themed Nuxt app, connected it to an Anthropic model through Amazon Bedrock , and gave it a tool that deletes files from my computer. In fact, if I wasn't careful, it could have deleted all my files! The first time I tried it, I didn't use any sort of approval mechanism. And as you expected it just deleted things. Then I looked into how my coding agent works, and I learned about tool approvals. I learned that AI SDK 7 has a tool approval at the model-call level. It works by pausing for an approval, showing an approval window, and then deleting it. I then put Kiro CLI behind the same interface using Agent Client Protocol (ACP). Watch the full video on YouTube . Prerequisites You need: Node.js 22 or later. AI SDK 7 requires Node.js 22 and uses ECMAScript modules (ESM). npm 11 or another package manager that works with Nuxt 4. AWS credentials available through the standard provider chain. Access to an Amazon Bedrock model in your AWS Region. The AWS CLI if you want to list the inference profiles available to your account. An authenticated Kiro CLI installation for the optional ACP section. Step 1: Create the Nuxt app Create the project and install the versions used in the recorded demo: npx nuxi@latest init nuxt-agent-approval cd nuxt-agent-approval npm install \ nuxt@4.5.2 \ vue@3.5.41 \ ai@7.0.66 \ @ai-sdk/vue@4.0.66 \ @ai-sdk/amazon-bedrock@5.0.57 \ @aws-sdk/credential-providers@3.1111.0 \ @nuxt/ui@4.10.0 \ zod@4.4.3 npm install -D @iconify-json/lucide@1.2.123 Register Nuxt UI and expose the Amazon Bedrock settings through server-side runtime config: // nuxt.config.ts export default defineNuxtConfig ({ modules : [ ' @nuxt/ui ' ], css : [ ' ~/assets/css/main.css ' ], runtimeConfig : { awsRegion : process . env . AWS_REGION ?? ' us-west-2 ' , bedrockModelId : process . env . NUXT_BEDROCK_MODEL_ID } }) Add the two Nuxt UI imports: /* app/assets/css/main.css */ @import "tailwindcss" ; @import "@nuxt/ui" ; You can c

2026-08-19 原文 →
AI 资讯

Unified Secrets Security with GitGuardian and AWS Secrets Manager

By: Pierre Le Clezio, Lead Product Manager – GitGuardian; Nic Gumina, Senior Security Consultant – AWS; Manu Chandrasekhar, Senior DevOps Consultant – AWS; Dan Parlin, Security Consultant – AWS This article was originally published at AWS blogs . The rise of AI coding assistants and Model Context Protocol (MCP) servers has accelerated the secret management challenge as developers increasingly share configuration files and context with AI tools that inadvertently expose sensitive credentials. API keys, access tokens, and credentials end up in Git repositories and CI/CD logs. Organizations lack answers to critical questions. They don't know which vaulted secrets have been exposed in code, whether developers have shared credentials through AI tool configurations, how many duplicate credentials exist across accounts, or how many orphaned secrets remain that no application uses. The visibility gap leads to: Credential exposure : Hardcoded secrets in version control systems create attack vectors that persist even after rotation Secret sprawl : Duplicate credentials across accounts expand your attack surface Compliance gaps : Inability to track secret lifecycles undermines audit requirements Remediation delays : Without correlation between secret inventory and code exposure, security teams lack the context to prioritize and act quickly With multi-account AWS architectures, the need for unified visibility becomes critical. Organizations need more than just a vault. They need visibility across the entire secret lifecycle, from developer workstations to production environments. GitGuardian and AWS Secrets Manager GitGuardian is an AWS Partner specializing in non-human identity (NHI) security, which focuses on protecting machine credentials such as API keys, service accounts, tokens, and secrets management. GitGuardian can be integrated with code repositories, container registries, package registries, documentation platforms, and messaging channels. GitGuardian's integration w

2026-08-17 原文 →
AI 资讯

Solve It Once: Kelsey Hightower's Talk Applied to Security Verification

✓ Human-authored analysis; AI used for formatting and proofreading. Kelsey Hightower gave a talk at PlatformCon 2026 that was about the arc of a career, from running commands in SharePoint to writing Go tools that play music on your terminal. The stories has an architecture principle that applies to how security verification should work. Solve the problem once, encode the solution as a reusable artifact, and never solve that problem again. The Jira loop He joined a company where deployments were driven by Jira tickets. Someone opens a ticket with deployment parameters. An engineer would read the ticket, copy the parameters, run the commands, paste the output back into the ticket, close it, and wait for the next one. Every hour, another ticket. Same process, commands and manual steps. The engineer became the loop. He wrote a Puppet manifest that watches the tickets, extracts the parameters, runs the deployment, posts the output, and closes the ticket. The loop ran once as automation and then it was over. No engineer in the loop or ticket waiting for a human. The problem was solved, permanently, by encoding the solution into a reusable artifact. Doing a repetitive manual process faster is not the right thing to do. Eliminate the loop by recognizing the abstraction hiding in the repetition and encoding it into an artifact that makes the manual steps unnecessary. The substrate This is the pattern that runs through every transition he describes. It's missed by most people when they talk about automation. System administrators ran deploy.sh manually. Docker didn't automate typing apt-get install . Docker recognized that "application + dependencies + environment" was a repeatable unit. The container image became the substrate. Deployment stopped being a sequence of commands and became a declaration. The commands didn't get faster. They became unnecessary. Operators placed workloads on servers manually. Kubernetes didn't automate SSH-ing into machines to check available mem

2026-08-16 原文 →
AI 资讯

Build an MCP server in Rust with rmcp: a walk-through 🦀

This tutorial walks through building an MCP server in Rust with rmcp , the official Model Context Protocol Rust SDK. The example is a real one: a devops agent that manages AWS EC2 G5g instances — Graviton2 boxes with NVIDIA T4G GPUs — serving Gemma 4 under vLLM. It launches instances, drives them over SSM, and health-checks the model. There's an existing Python version, so at the end we can put the two side by side. Follow along and you'll have a working, registerable MCP server. 🦀 Why Rust for this? Worth answering properly, because the weak version of the argument is easy to make and easy to demolish — and the real one is better anyway. Start with what it isn't: these tools are I/O bound. Every one is an AWS API call — describe_instances , send_command , polling SSM — so 100–500 ms of network per call. The caller's language contributes nothing measurable there. Anyone selling you a Rust rewrite on raw speed for this workload is selling something. Three claims that don't hold, so nobody has to make them in the comments: Claim Why it fails "462 ms startup is slow" stdio servers spawn once per session , not per call "Rust is faster" the work is network round-trips to AWS "smaller supply chain" 241 crates vs 34 Python packages — it's worse What actually justifies it, for this codebase: 1. It's a fleet, not a server. This monorepo has 16 rigs , each with its own MCP server. That changes the units: All loaded together 🐍 Python 🦀 Rust Resident memory 16 × 83 MB ≈ 1.33 GB 16 × 12 MB ≈ 192 MB Session startup 16 × 462 ms ≈ 7.4 s 16 × 2.5 ms ≈ 40 ms A gigabyte of resident Python to expose sixteen tool lists is a real cost. 2. No shared interpreter. These rigs install system-wide — no virtualenvs, by policy — so all sixteen share one Python. Sixteen servers with independently drifting boto3 and mcp pins in one interpreter is a standing conflict risk. A static binary has no such coupling; each rig pins whatever it likes in its own Cargo.lock . 3. The schema can't drift from th

2026-08-16 原文 →
AI 资讯

Build an MCP server in Rust with rmcp: a walk-through 🦀

This tutorial walks through building an MCP server in Rust with rmcp , the official Model Context Protocol Rust SDK. The example is a real one: a devops agent that manages AWS EC2 G5g instances — Graviton2 boxes with NVIDIA T4G GPUs — serving Gemma 4 under vLLM. It launches instances, drives them over SSM, and health-checks the model. There's an existing Python version, so at the end we can put the two side by side. Follow along and you'll have a working, registerable MCP server. 🦀 Why Rust for this? Worth answering properly, because the weak version of the argument is easy to make and easy to demolish — and the real one is better anyway. Start with what it isn't: these tools are I/O bound. Every one is an AWS API call — describe_instances , send_command , polling SSM — so 100–500 ms of network per call. The caller's language contributes nothing measurable there. Anyone selling you a Rust rewrite on raw speed for this workload is selling something. Three claims that don't hold, so nobody has to make them in the comments: Claim Why it fails "462 ms startup is slow" stdio servers spawn once per session , not per call "Rust is faster" the work is network round-trips to AWS "smaller supply chain" 241 crates vs 34 Python packages — it's worse What actually justifies it, for this codebase: 1. It's a fleet, not a server. This monorepo has 16 rigs , each with its own MCP server. That changes the units: All loaded together 🐍 Python 🦀 Rust Resident memory 16 × 83 MB ≈ 1.33 GB 16 × 12 MB ≈ 192 MB Session startup 16 × 462 ms ≈ 7.4 s 16 × 2.5 ms ≈ 40 ms A gigabyte of resident Python to expose sixteen tool lists is a real cost. 2. No shared interpreter. These rigs install system-wide — no virtualenvs, by policy — so all sixteen share one Python. Sixteen servers with independently drifting boto3 and mcp pins in one interpreter is a standing conflict risk. A static binary has no such coupling; each rig pins whatever it likes in its own Cargo.lock . 3. The schema can't drift from th

2026-08-16 原文 →
AI 资讯

My First Time Putting an App on AWS (A Beginner's Story)

Today I did something I've wanted to do for a while — I took an app running on my own laptop and put it "live" on the internet using AWS. It sounds scary when you read about it online, but once I actually did it, it was just a bunch of small, simple steps, one after another. This post is me writing down everything I did, in plain, easy words, so that if you're a beginner like me, you can follow along without getting confused by fancy tech terms. What is AWS, in simple words? AWS (Amazon Web Services) is basically Amazon renting out computers over the internet. Instead of buying your own physical server and keeping it running 24/7 at home, you "rent" a computer from Amazon. That computer runs your app, and anyone with the internet can visit it. The specific service I used is called EC2 . Think of EC2 as one virtual computer that lives in Amazon's data center, and you get to control it like it's your own. Step 1: Set up IAM first Before touching any servers, I went to IAM (Identity and Access Management). This is AWS's way of managing "who is allowed to do what" in your account. In simple words: instead of using your main AWS login for everything (which is risky), IAM lets you create a separate user with its own permissions. It's like giving someone a spare key instead of your master key. I set this up first so my account stays safer. Step 2: Launch an EC2 instance Next, I went to the EC2 section and launched a new instance (a fancy word for "a virtual computer"). During this step, AWS also lets you create a .pem file — this is basically a secret key file. It's like a digital key to a lock. Only someone with this file can get into the server. I downloaded it and kept it safe, because if you lose it, you can't easily get back in. Step 3: Login to the server using SSH Once the server (EC2 instance) was ready, I needed a way to "log in" to it from my own laptop. For that, I used something called SSH, along with the .pem key file I downloaded earlier. In simple words: SSH

2026-08-16 原文 →
AI 资讯

Shipping a vision-model verdict on Bedrock and Lightsail

Built 2026-08-15 against us.amazon.nova-lite-v1:0 via the Bedrock Converse API. FastAPI on Python 3.13, deployed to an Amazon Lightsail container service ( nano , scale 1) in us-east-1 . Scored against the live deployment, not localhost: 20/20 on the fixture set, median 880 ms per scan. Live: Dog or Not: Lite · Source: github.com/xbill9/dog-or-not-lite · Built for the AWS Weekend Challenge: Build a Creative App . TL;DR Make the model fill in a schema instead of writing a sentence. The Converse API's toolConfig plus toolChoice forces a named function call, so is_dog arrives as a boolean because it was declared as one. Every image comes back in the same shape — including the ambiguous ones, which is exactly where free-text output gets creative and a string-matching parser gets it wrong. The app is a webcam scanner that tells you whether the thing you are holding up is a dog. One HTML page, one POST /api/scan , one model call, no build step, no framework. The whole backend is 285 lines. Three AWS specifics are worth the price of admission: Lightsail container services have no IAM task role. There is nothing to attach a policy to, so the container needs a real access key as an environment variable. The mitigation is scope, not secrecy. A cross-region inference profile is authorized against every region it routes to. With the policy pinned to us-east-1 , a call made to us-east-1 was denied naming us-west-2 . Measured, not inferred. --platform linux/amd64 is not optional. An arm64 image builds, pushes and deploys cleanly, then crash-loops with an exec format error that never mentions architecture. And a mock mode that answers every scan locally is what made the frontend free to build — no credentials, no model access, no bill. 1. The shape: one route, one call The classification rule is the only opinionated part. is_dog is true only for a living domestic dog: a wolf is not a dog , nor is a coyote, fox, plush toy, bronze statue, cartoon, or person in a costume. That is a c

2026-08-16 原文 →
开发者

AWS Introduces Native Vector Search for DynamoDB

Amazon DynamoDB recently introduced native vector search, allowing developers to store embeddings alongside application data and run approximate nearest-neighbor queries directly from DynamoDB without using a separate vector database. The feature supports filtered similarity searches and configurable vector indexes for semantic search workloads. By Renato Losio

2026-08-16 原文 →
AI 资讯

Serving Gemma4 with Rust on vLLM 🦀

This tutorial walks through installing and setting up the Rust toolchain for vLLM on an AWS EC2 G5g instance — Graviton2 (aarch64) with an NVIDIA T4G GPU — and getting vLLM's Rust frontend ( vllm-rs ) built, running, and verified . This paper is a follow-on to the original G5g Gemma 4 build. Everything below was run on the box. 🦀 Wait, vLLM has Rust in it? You betcha. Since PR #40848 (merged 2026-05-21), vLLM vendors a 14-crate Rust workspace : bench chat cmd engine-core-client llm managed-engine metrics mock-engine parser parser/python server text tokenizer tracing Edition 2024, resolver 3. Straight from the vendored rust/Cargo.toml : Crate Version Job axum 0.8.8 the HTTP server tokio 1.47.1 async runtime zeromq 0.6.0 talks to the Python engine rmp-serde / rmpv 1.3.1 msgpack on the wire minijinja 2.22 chat templates tonic / prost 0.14.6 / 0.14.3 gRPC — remember this one It's a drop-in replacement for the Python FastAPI server. Two artifacts get built: 🦀 vllm-rs — the axum frontend binary 🐍 vllm._rust_tool_parser — a PyO3 extension module Rust is a build requirement now That's the headline, and it's reason enough on its own: you cannot build vLLM from source at v0.27.2rc0 without Rust in the picture. setup.py imports it at module scope, line 21, unguarded: from setuptools_rust.build import build_rust No try , no feature flag, no opt-out. Metadata generation doesn't happen without it. And this isn't a quirk of one release. vLLM's Rust surface is 14 crates covering the HTTP frontend, the tool parser, the tokenizer and the benchmark client, and it has been growing since it landed. If you build inference infrastructure from source, a Rust toolchain is becoming table stakes — so it's worth knowing how to drive it properly rather than working around it. Three things do get conflated, though, and they have different scopes: Component Needed to build vLLM? Needed to serve? setuptools_rust (Python pkg) yes, always no cargo / rustc toolchain for working Rust artifacts no prot

2026-08-15 原文 →
AI 资讯

AWS News - S1E2

Last week we kicked off a series covering the (data/storage/network) announcements that, in my view, had the most impact. This week I'm bringing 5 more recent launches to run through the fine-tooth comb. Description, the pain point it solved, and my critical take on each one. 1. Aurora DSQL lands in five more regions What it is: Aurora DSQL, AWS's distributed, serverless SQL database, is now available in Asia Pacific (Hong Kong), Asia Pacific (Mumbai), Asia Pacific (Singapore), Europe (Stockholm), and South America (São Paulo). With this launch, it now covers 19 regions total. Official link: https://aws.amazon.com/about-aws/whats-new/2026/05/amazon-aurora-dsql-five-additional-aws-regions/ How it used to be (the pain point): Until now, if you wanted to run Aurora DSQL with decent latency for users in Brazil, there was no regional option here. You either accepted the latency of hitting us-east-1 (an ugly phrase for a transactional application to hear) or gave up on DSQL entirely and went with a traditional Aurora PostgreSQL, purely for geographic proximity. My take: region expansion is the kind of announcement that isn't sexy, but it's what decides whether a service actually goes into production or stays a showcase item. With São Paulo on the list, the main adoption blocker for DSQL around here (latency) drops significantly. That said, it's worth remembering DSQL is still a relatively young product, with compatibility limitations against full PostgreSQL (extensions, certain data types, certain transactional features). Regional presence solves latency, it doesn't solve feature-set maturity. Those are two separate conversations. 2. Aurora DSQL gets a native PHP connector What it is: launch of the Aurora DSQL connector for PHP (PDO_PGSQL), which handles IAM authentication natively: generates a token per connection, guarantees the valid token gets used, and keeps full compatibility with the PDO_PGSQL that the PHP ecosystem already knows. It also brings retry with exponent

2026-08-14 原文 →
AI 资讯

AWS WAF Challenge : bloquer les bots avant qu’ils n’atteignent l’application

Quand on m’a appelé, l’attaque durait depuis environ une semaine. Elle visait la page de connexion d’une application historique qui générait son HTML côté serveur. Les requêtes se comptaient en millions et provenaient d’un très grand nombre d’adresses IP, ce qui rendait un blocage par IP peu efficace. Contrairement à d’autres campagnes que j’avais rencontrées, l’assaillant faisait également tourner ses empreintes JA3 et JA4. Même un rate limiting agrégé sur ces signaux ne pouvait donc apporter qu’une réponse partielle. Quelques jours plus tard, une attaque similaire a visé une deuxième application chez mon client. Cette fois, il ne s’agissait plus de l’ancienne application server-side, mais d’une SPA (single page app) qui appelait une API JSON pour créer les comptes. Ces deux incidents m’ont permis d’utiliser les deux modes d’intégration de la fonctionnalité Challenge d’AWS WAF : le challenge directement renvoyé par le WAF pour une page HTML ; le challenge résolu en amont par challenge.js , puis transmis à une API appelée avec fetch . Pourquoi placer le challenge côté infrastructure ? Si mon client m'a appelé au bout de 7 jours, c'est que l'équipe a d'abord essayé de traiter l'attaque au niveau applicatif, via l'intégration de Cloudflare Turnstile. L’intégration était sérieuse. Un module PrestaShop gérait les clés, l’activation globale et des configurations distinctes selon le tenant. Lors de la soumission, l’application récupérait le jeton du formulaire et le validait elle-même auprès de Cloudflare : $turnstileToken = Tools :: getValue ( 'cf-turnstile-response' ); if ( empty ( $turnstileToken )) { $turnstileValid = false ; } elseif ( ! $this -> verifyTurnstileToken ( $turnstileToken )) { $turnstileValid = false ; } La validation nécessitait ensuite un appel serveur vers siteverify : $response = Tools :: file_get_contents ( 'https://challenges.cloudflare.com/turnstile/v0/siteverify' , false , stream_context_create ([ 'http' => [ 'method' => 'POST' , 'header' => 'Con

2026-08-14 原文 →
AI 资讯

Running Gemma 4 on EC2 G5g: Graviton2 AMD with NVIDIA GPU

A field report on serving Google's Gemma 4 E2B on AWS EC2 **G5g * — a Graviton2 (aarch64) host with an NVIDIA T4G (Turing, SM 7.5) GPU. Three obstacles: an arch list nobody publishes for this combination, a version floor that only the newest vLLM clears, and 64 KiB of shared memory that stops the model dead. Plus the seven things I documented wrong before I had a box.* Model google/gemma-4-E2B-it (reference bf16 release) Hardware AWS EC2 g5g.4xlarge — Graviton2 + 1x NVIDIA T4G, compute capability 7.5 , 15,360 MiB Base image Deep Learning ARM64 AMI OSS Nvidia Driver GPU PyTorch 2.12 (Ubuntu 24.04) Software torch 2.12.0+cu132 · CUDA 13.2 · vLLM v0.27.2rc0 built from source for sm_75 Result 43.1 tok/s single-stream greedy, 329,579-token KV cache — after one patch to vLLM G5g is the only instance AWS has ever shipped that puts an NVIDIA GPU behind a Graviton host. It launched in 2020, it never got a successor, and Graviton is now on its fifth generation without one. That matters more than it sounds. The Arm-plus-CUDA world moved on to NVIDIA's own Arm CPU — Grace, paired with SM 9.0 and 10.0 parts. Turing stayed well supported, on x86. G5g is the only hardware that is aarch64 and compute capability 7.5, and almost nobody publishes a build for that combination. I put a rig on one anyway. The packaging problem was the quick part. Everything after it — a compiler that was not there, a version floor I did not expect, and 32 KiB of shared memory — took far longer, because none of it fails where you are looking. No published build covers aarch64 and SM 7.5 together Start with the obvious candidate. vllm/vllm-openai:v0.27.1 publishes both platforms under one tag, and you can read the arch lists straight out of the image config without pulling a layer: docker buildx imagetools inspect vllm/vllm-openai:v0.27.1 --format '{{json .Image}}' linux/amd64 7.5 8.0 8.6 8.9 9.0 10.0 12.0 linux/arm64 8.0 8.7 8.9 9.0 10.0 11.0 12.0 The one architecture this hardware needs is the only entry

2026-08-14 原文 →
AI 资讯

Running Gemma 4 on EC2 G5g: Graviton2 AMD with NVIDIA GPU

A field report on serving Google's Gemma 4 E2B on AWS EC2 **G5g * — a Graviton2 (aarch64) host with an NVIDIA T4G (Turing, SM 7.5) GPU. Three obstacles: an arch list nobody publishes for this combination, a version floor that only the newest vLLM clears, and 64 KiB of shared memory that stops the model dead. Plus the seven things I documented wrong before I had a box.* Model google/gemma-4-E2B-it (reference bf16 release) Hardware AWS EC2 g5g.4xlarge — Graviton2 + 1x NVIDIA T4G, compute capability 7.5 , 15,360 MiB Base image Deep Learning ARM64 AMI OSS Nvidia Driver GPU PyTorch 2.12 (Ubuntu 24.04) Software torch 2.12.0+cu132 · CUDA 13.2 · vLLM v0.27.2rc0 built from source for sm_75 Result 43.1 tok/s single-stream greedy, 329,579-token KV cache — after one patch to vLLM G5g is the only instance AWS has ever shipped that puts an NVIDIA GPU behind a Graviton host. It launched in 2020, it never got a successor, and Graviton is now on its fifth generation without one. That matters more than it sounds. The Arm-plus-CUDA world moved on to NVIDIA's own Arm CPU — Grace, paired with SM 9.0 and 10.0 parts. Turing stayed well supported, on x86. G5g is the only hardware that is aarch64 and compute capability 7.5, and almost nobody publishes a build for that combination. I put a rig on one anyway. The packaging problem was the quick part. Everything after it — a compiler that was not there, a version floor I did not expect, and 32 KiB of shared memory — took far longer, because none of it fails where you are looking. No published build covers aarch64 and SM 7.5 together Start with the obvious candidate. vllm/vllm-openai:v0.27.1 publishes both platforms under one tag, and you can read the arch lists straight out of the image config without pulling a layer: docker buildx imagetools inspect vllm/vllm-openai:v0.27.1 --format '{{json .Image}}' linux/amd64 7.5 8.0 8.6 8.9 9.0 10.0 12.0 linux/arm64 8.0 8.7 8.9 9.0 10.0 11.0 12.0 The one architecture this hardware needs is the only entry

2026-08-14 原文 →
AI 资讯

I need one picture that shows where the money goes

Someone in every company eventually says this out loud. Usually it's the CFO. Sometimes it's a VP of engineering, or the unlucky engineer who got handed "own our cloud costs" on top of their actual job. The bill comes in, it's up again, the spreadsheet has eleven tabs, and someone finally says: "Stop. I don't want another spreadsheet. I need one picture that shows where the money goes." It's a completely reasonable request. It's also strangely hard to satisfy with the tools most teams already have. This post is about why, where the money usually turns out to be going, and what that one picture actually looks like. The bill answers "how much". The question is "where" A cloud bill is a flat table — a very big one. An AWS Cost and Usage Report can run to millions of rows, and every row is precise: this resource, this hour, this rate. If your question is "how much did we spend on EC2 in July", the tools answer instantly. But "where does the money go" is a different kind of question. A dollar enters the company as one line on an invoice and then travels: through a provider, into an account, into some kind of resource, and finally — ideally — onto somebody's team. It's a path, not a number. Flat tables don't show paths. Native tools slice one dimension at a time. Cost Explorer will show you spend by service. Or by linked account. Or by one tag. Each view is true, and each view is a dead end, because the question in the meeting is always a path through several dimensions at once: which team's non-prod environments, in which account, are driving the compute growth? Answering that with one-dimensional views means six tabs and a join you perform in your head. The join in your head is where the meeting dies. So people fall back to the spreadsheet. Someone brave builds a pivot table; it's accurate for a week, then a re-org or a new account lands and it quietly becomes fiction that everyone still forwards. Where the money usually goes We look at a lot of cloud bills. The leaks a

2026-08-13 原文 →
AI 资讯

Reclaiming Terabytes: How to Cut a Managed Database Bill Without Downtime

Managed databases are the cloud cost line people quietly stop looking at. Compute gets rightsized, storage on the instances gets cleaned, but the RDS, Aurora, or Azure SQL bill just grows, because a database feels too load-bearing to touch. It is not. Here is how I have cut managed database spend without a maintenance window, in the order of least risk to most. The theme throughout: databases give you more no-downtime levers than people assume, and the biggest wins are usually storage and rightsizing, not some exotic re-architecture. Start with the free win: reclaim dead storage Storage is where the surprise terabytes hide, and most of it comes off with zero downtime. Drop what nobody reads. Old audit tables, soft-deleted rows that were never purged, expired sessions, staging data that got promoted to prod years ago. A DELETE in batches plus a purge job is the boring, safe first move. Reclaim space after deletes. On Postgres, deleted rows leave bloat until vacuumed. Run VACUUM (and check pg_stat_user_tables for dead tuples). On SQL Server / Azure SQL, rebuild or reorganize fragmented indexes to reclaim pages. This is where the "reclaimed terabytes" headlines actually come from. Kill redundant indexes. Unused and duplicate indexes cost storage and slow writes. Postgres pg_stat_user_indexes (look for idx_scan = 0 ) and SQL Server's missing/unused index DMVs tell you which ones earn their keep. Dropping an unused index is online. Right-size your storage type. On AWS, moving from gp2 to gp3 lets you provision IOPS and throughput independently and usually costs less for the same performance. The modify is applied without downtime. None of the above requires a window. It is pure hygiene, and on a neglected database it is often the single biggest line-item drop. Rightsize the instance (yes, without downtime) The reflex fear is that resizing a database means an outage. With a Multi-AZ deployment it usually does not. Check if you are oversized first. Pull 30 days of CPU, fre

2026-08-13 原文 →
AI 资讯

Agent Identity and Durable Workflows: The Two Problems MCP Can't Solve

MCP 2026-07-28 dropped sessions. The initialize handshake is gone. The Mcp-Session-Id header is gone from Streamable HTTP. Protocol version, client info, and capabilities now travel in a _meta field on every request, so any instance can serve any call. The protocol is cleaner for it. This is the largest revision since launch, and it leaves both of the questions that block enterprise agent deployments exactly where they were. MCP standardizes how a model reaches a tool. Neither question lives inside that scope, and no future revision is likely to put them there: Who is the agent acting as, and what is it allowed to do? What happens when a process takes three days and the model context is gone? The spoiler: on AWS the parts already exist. Policy in AgentCore evaluates every Gateway call in Cedar against a principal, an action, and a resource, and writes the allow or deny to an audit log. Temporal policies, added in August 2026, extend that across an agent's trajectory, including human approval ahead of a privileged action. AgentCore Identity distributes the credentials. Step Functions holds anything measured in days. The remaining work is composition: deciding which principal each agent acts as, and what it may commit to. No service ships that decision. What the stateless redesign actually solved The stateless redesign removes real pain. Long-held SSE connections forced sticky routing, which pushed teams into shared session stores and gateway packet inspection just to scale horizontally. The new model provisions for request rate instead of concurrent users. A round-robin load balancer is now enough. Lambda, Cloud Run, and Workers become viable backends. Multi Round-Trip Requests (SEP-2322) handle elicitation without a held connection. The server returns an InputRequiredResult carrying what it still needs plus an opaque requestState blob. The client collects the answers and re-issues the same call with inputResponses and the echoed state. Any instance picks up the retr

2026-08-13 原文 →