[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"summary-22a507e9a7c41be0-ditch-preferred-username-for-azure-ad-guest-auth-summary":3,"summaries-facets-categories":134,"summary-related-22a507e9a7c41be0-ditch-preferred-username-for-azure-ad-guest-auth-summary":3703},{"id":4,"title":5,"ai":6,"body":13,"categories":103,"created_at":105,"date_modified":105,"description":97,"extension":106,"faq":105,"featured":107,"kicker_label":105,"meta":108,"navigation":115,"path":116,"published_at":117,"question":105,"scraped_at":118,"seo":119,"sitemap":120,"source_id":121,"source_name":122,"source_type":123,"source_url":124,"stem":125,"tags":126,"thumbnail_url":105,"tldr":131,"tweet":105,"unknown_tags":132,"__hash__":133},"summaries\u002Fsummaries\u002F22a507e9a7c41be0-ditch-preferred-username-for-azure-ad-guest-auth-summary.md","Ditch preferred_username for Azure AD Guest Auth",{"provider":7,"model":8,"input_tokens":9,"output_tokens":10,"processing_time_ms":11,"cost_usd":12},"openrouter","x-ai\u002Fgrok-4.1-fast",3889,1604,23473,0.00107295,{"type":14,"value":15,"toc":96},"minimark",[16,21,33,39,43,48,51,55,66,93],[17,18,20],"h2",{"id":19},"production-bug-exposed-by-b2b-guests","Production Bug Exposed by B2B Guests",[22,23,24,25,29,30,32],"p",{},"Internal QA passed because testers used employee accounts, where Azure AD's ",[26,27,28],"code",{},"preferred_username"," claim reliably matched their email for whitelisting and access control. But three weeks post-launch, a B2B client's guest users logged in successfully yet hit 403 errors due to mismatched identity. Guests have active sessions and valid Azure AD accounts, but ",[26,31,28],{}," doesn't provide a usable email—it's often absent, null, or mismatched for external users invited via B2B collaboration. This single claim broke the entire auth flow, granting sessions without proper rights.",[22,34,35,36,38],{},"To replicate and confirm: Employee flow succeeds (",[26,37,28],{}," == email), guest flow authenticates but fails authorization since the claim can't anchor whitelists reliably.",[17,40,42],{"id":41},"preferred_username-limitations-for-guests","preferred_username Limitations for Guests",[22,44,45,47],{},[26,46,28],{}," isn't a true email field—it's a user-provided hint for login names, populated only for workplace-joined accounts. For B2B guests (external users invited to your tenant), Azure AD doesn't set it to their guest email; it might reflect their home tenant's UPN or be empty. Result: Your system sees a non-email value or null, failing email-based checks for access groups or features.",[22,49,50],{},"Trade-off: Convenient for internal users (matches UPN\u002Femail), but zero fallback for guests. Never use it as the sole identifier—it's not guaranteed unique or stable across user types.",[17,52,54],{"id":53},"anchor-identities-on-oid-for-cross-user-stability","Anchor Identities on oid for Cross-User Stability",[22,56,57,58,61,62,65],{},"Use Azure AD's ",[26,59,60],{},"oid"," (object ID) claim instead: a stable, tenant-wide UUID unique to every user, including guests. Pair it with ",[26,63,64],{},"userType"," (\"Member\" vs \"Guest\") to differentiate and route logic:",[67,68,69,76,90],"ul",{},[70,71,72,73,75],"li",{},"Fetch user details via Microsoft Graph API using ",[26,74,60],{},".",[70,77,78,79,81,82,85,86,89],{},"Check ",[26,80,64],{}," to apply guest-specific handling (e.g., map to external email from ",[26,83,84],{},"mail"," or ",[26,87,88],{},"userPrincipalName",").",[70,91,92],{},"Whitelist based on verified attributes, not fragile claims.",[22,94,95],{},"This ensures employees and guests both resolve correctly without silent failures. Post-fix: Validate claims in dev\u002Fstaging with mixed user types, and monitor auth logs for claim mismatches to catch regressions early.",{"title":97,"searchDepth":98,"depth":98,"links":99},"",2,[100,101,102],{"id":19,"depth":98,"text":20},{"id":41,"depth":98,"text":42},{"id":53,"depth":98,"text":54},[104],"Software Engineering",null,"md",false,{"content_references":109,"triage":110},[],{"relevance":111,"novelty":112,"quality":111,"actionability":111,"composite":113,"reasoning":114},4,3,3.8,"Category: DevOps & Cloud. The article addresses a specific pain point regarding Azure AD authentication for B2B guests, providing actionable guidance on using `oid` instead of `preferred_username` for reliable identification. It offers concrete steps for implementing a more stable authentication flow, which is directly applicable to developers working with Azure AD.",true,"\u002Fsummaries\u002F22a507e9a7c41be0-ditch-preferred-username-for-azure-ad-guest-auth-summary","2026-05-06 14:20:27","2026-05-06 16:13:27",{"title":5,"description":97},{"loc":116},"22a507e9a7c41be0","Level Up Coding","article","https:\u002F\u002Flevelup.gitconnected.com\u002Fwe-shipped-broken-auth-for-every-guest-user-an-azure-ad-oauth-post-mortem-6cf6f70c6909?source=rss----5517fd7b58a6---4","summaries\u002F22a507e9a7c41be0-ditch-preferred-username-for-azure-ad-guest-auth-summary",[127,128,129,130],"backend","devops","cloud","authentication","Using preferred_username as identity anchor worked for employees but failed silently for all B2B guests, causing 403 errors post-launch. Anchor on oid instead for reliable 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Horizontal scaling with Kubernetes replicas behind a load balancer breaks this: clients connect to one pod (e.g., Pod A), but callbacks hit another (Pod B). Pod B processes correctly—validates, logs, persists state, returns 200 OK—but can't deliver since it lacks the in-memory connection. Users see no updates despite healthy metrics (low CPU, latency, errors). This 'distributed client-context problem' emerges because stateless services scale execution but not long-lived connections, which remain process-local state.",[22,3722,3723],{},"Cloud-native statelessness excels for scaling and recovery but ignores that connections bind to specific replicas. Async webhooks and background jobs land anywhere, decoupling execution from delivery without explicit coordination.",[17,3725,3727],{"id":3726},"decouple-processing-from-delivery-using-pubsub","Decouple Processing from Delivery Using Pub\u002FSub",[22,3729,3730],{},"Sticky sessions or switching SSE to WebSockets fail because they don't solve replica mismatch. Instead, add a broadcast layer: receiving replica publishes events to a shared channel (Redis Pub\u002FSub fits for low-latency fan-out). All replicas subscribe; only the connection-owning one forwards to the client.",[22,3732,3733],{},"Derive stable channel IDs from user\u002Frequest IDs. Each pod maps these to active in-memory connections via a shared subscriber, avoiding per-client subscriptions that don't scale. Clean up mappings on disconnect to prevent stale references, memory leaks, or race conditions during reconnects. This makes delivery predictable without routing callbacks to specific pods.",[22,3735,3736],{},"Stateless services don't eliminate state—they relocate it (e.g., to Redis). Coordination treats delivery as a separate concern from processing, enabling clean horizontal scaling.",[17,3738,3740],{"id":3739},"monitor-end-to-end-delivery-not-just-processing","Monitor End-to-End Delivery, Not Just Processing",[22,3742,3743],{},"Dashboards miss this: processing succeeds (green metrics), but delivery fails silently. Propagate correlation IDs across initiation, callback, publication, and client receipt to trace divergences. Alert on coordination health—e.g., published events without deliveries—beyond infrastructure metrics.",[22,3745,3746],{},"Make updates idempotent: duplicates harmless, misses recoverable by client polling authoritative backend state. Streaming enhances UX but isn't correctness; backend state remains source of truth. Redis Pub\u002FSub's transience (lost on restarts) reinforces this discipline.",[17,3748,3750],{"id":3749},"design-rules-prevent-recurrence","Design Rules Prevent Recurrence",[67,3752,3753,3756,3759,3762],{},[70,3754,3755],{},"Treat connections as local state, not shared.",[70,3757,3758],{},"Broadcast for any-node completion.",[70,3760,3761],{},"Track full-path delivery with correlation IDs.",[70,3763,3764],{},"Ensure idempotency and authoritative state.",[22,3766,3767],{},"Ask upfront: which replica owns the connection, and how does the system find it? This beats transport tweaks. Modern Kubernetes dynamism, webhook reliance, and real-time UIs amplify the issue in event-driven SaaS.",{"title":97,"searchDepth":98,"depth":98,"links":3769},[3770,3771,3772,3773],{"id":3716,"depth":98,"text":3717},{"id":3726,"depth":98,"text":3727},{"id":3739,"depth":98,"text":3740},{"id":3749,"depth":98,"text":3750},[456],{},"\u002Fsummaries\u002Fscale-stateless-backends-by-broadcasting-client-up-summary","2026-04-08 21:21:18",{"title":3706,"description":97},{"loc":3776},"8d886af13994638f","https:\u002F\u002Funknown","summaries\u002Fscale-stateless-backends-by-broadcasting-client-up-summary",[128,129,127],"Horizontal scaling routes callbacks to replicas without client SSE\u002FWebSocket connections, silently dropping updates—broadcast via Redis Pub\u002FSub so the owning replica delivers reliably.",[],"TOIjOhsFcV2nmf_hCLl0rioLl1_qbmxOn-UyAQfb22E",{"id":3788,"title":3789,"ai":3790,"body":3795,"categories":3840,"created_at":105,"date_modified":105,"description":97,"extension":106,"faq":105,"featured":107,"kicker_label":105,"meta":3841,"navigation":115,"path":3847,"published_at":3848,"question":105,"scraped_at":3849,"seo":3850,"sitemap":3851,"source_id":3852,"source_name":3853,"source_type":123,"source_url":3854,"stem":3855,"tags":3856,"thumbnail_url":105,"tldr":3857,"tweet":105,"unknown_tags":3858,"__hash__":3859},"summaries\u002Fsummaries\u002F73f55123201134f9-mount-s3-buckets-as-file-systems-with-aws-s3-files-summary.md","Mount S3 Buckets as File Systems with AWS S3 Files",{"provider":7,"model":8,"input_tokens":3791,"output_tokens":3792,"processing_time_ms":3793,"cost_usd":3794},3939,1507,8922,0.00151865,{"type":14,"value":3796,"toc":3835},[3797,3801,3804,3811,3815,3818,3821,3825,3828],[17,3798,3800],{"id":3799},"s3-files-delivers-native-file-system-access-to-s3","S3 Files Delivers Native File System Access to S3",[22,3802,3803],{},"AWS S3 Files transforms object storage into a POSIX-compliant file system mountable on EC2 instances, containers, and Lambda functions. This eliminates custom hacks like FUSE wrappers or periodic sync scripts, providing low-latency read\u002Fwrite access indistinguishable from local disks for AI\u002FML, data engineering, and DevOps workloads. Under the hood, it leverages S3's metadata for directory structures and supports standard file operations without data migration—your existing buckets work immediately.",[22,3805,3806,3807,3810],{},"To implement, grant IAM roles with s3:PutObject, s3:GetObject, etc., permissions scoped to the bucket prefix, then mount via AWS CLI or SDK: ",[26,3808,3809],{},"aws s3files mount s3:\u002F\u002Fyour-bucket \u002Fmnt\u002Fpoint",". This cuts integration time from hours of scripting to minutes, enabling seamless data access in containerized ML training pipelines or serverless inference.",[17,3812,3814],{"id":3813},"realistic-use-cases-in-aiml-and-devops","Realistic Use Cases in AI\u002FML and DevOps",[22,3816,3817],{},"For AI\u002FML teams, mount training datasets directly into Jupyter on EC2 or SageMaker, avoiding costly EBS volumes or data downloads—process petabyte-scale S3 data at near-native speeds. DevOps benefits include containerized ETL jobs reading\u002Fwriting S3 as local files without volume mounts, and Lambda functions handling file I\u002FO for event-driven processing without temporary storage hacks.",[22,3819,3820],{},"Trade-offs: Strong consistency for small files (\u003C100MB), eventual consistency for large ones; throughput caps at S3's request rates (3,500 PUT\u002FGET per prefix\u002Fsec). Ideal for read-heavy ML feature stores or log processing, less so for high-write transactional DBs.",[17,3822,3824],{"id":3823},"avoid-common-pitfalls-security-cost-data-risks","Avoid Common Pitfalls: Security, Cost, Data Risks",[22,3826,3827],{},"Misconfigurations amplify S3's pitfalls: Broad IAM policies expose buckets publicly—use least-privilege with bucket policies denying public access and encrypting at-rest\u002Ftransit. Costs spike from unoptimized PUTs (e.g., frequent small writes); batch operations and use Intelligent-Tiering to mitigate, monitoring via CloudWatch for >$0.023\u002FGB PUT fees.",[22,3829,3830,3831,3834],{},"Data loss hits from concurrent writes without locks—implement app-level semaphores or use S3 atomic operations. Test mounts in staging: unmount with ",[26,3832,3833],{},"aws s3files unmount \u002Fmnt\u002Fpoint"," to verify no corruption. Always enable versioning and MFA-delete on production buckets.",{"title":97,"searchDepth":98,"depth":98,"links":3836},[3837,3838,3839],{"id":3799,"depth":98,"text":3800},{"id":3813,"depth":98,"text":3814},{"id":3823,"depth":98,"text":3824},[456],{"content_references":3842,"triage":3843},[],{"relevance":3844,"novelty":111,"quality":111,"actionability":111,"composite":3845,"reasoning":3846},5,4.35,"Category: DevOps & Cloud. The article provides a detailed explanation of how AWS S3 Files can be used to enhance AI\u002FML workflows by transforming S3 buckets into file systems, addressing a specific pain point for developers looking to streamline data access. It includes practical implementation steps and highlights potential pitfalls, making it actionable for the target audience.","\u002Fsummaries\u002F73f55123201134f9-mount-s3-buckets-as-file-systems-with-aws-s3-files-summary","2026-04-18 18:01:01","2026-04-19 01:22:18",{"title":3789,"description":97},{"loc":3847},"73f55123201134f9","Towards AI","https:\u002F\u002Fpub.towardsai.net\u002Faws-s3-files-explained-the-smarter-way-to-turn-s3-buckets-into-file-systems-3459560f7046?source=rss----98111c9905da---4","summaries\u002F73f55123201134f9-mount-s3-buckets-as-file-systems-with-aws-s3-files-summary",[128,129],"AWS S3 Files mounts buckets directly as file systems on EC2, containers, and Lambda—eliminating FUSE hacks and sync scripts for AI\u002FML workflows, but misconfigurations risk exposing, corrupting, or losing data.",[],"i9cGWnIzxtJTktm1csYQQ2MxZ9wdsHkt8i8DFEsZ0tQ",{"id":3861,"title":3862,"ai":3863,"body":3868,"categories":3894,"created_at":105,"date_modified":105,"description":97,"extension":106,"faq":105,"featured":107,"kicker_label":105,"meta":3895,"navigation":115,"path":3899,"published_at":3900,"question":105,"scraped_at":3901,"seo":3902,"sitemap":3903,"source_id":3904,"source_name":122,"source_type":123,"source_url":3905,"stem":3906,"tags":3907,"thumbnail_url":105,"tldr":3908,"tweet":105,"unknown_tags":3909,"__hash__":3910},"summaries\u002Fsummaries\u002F71dc58e232e9091c-zero-leak-debt-kill-100-leaked-secrets-platform-wi-summary.md","Zero Leak Debt: Kill 100+ Leaked Secrets Platform-Wide",{"provider":7,"model":8,"input_tokens":3864,"output_tokens":3865,"processing_time_ms":3866,"cost_usd":3867},3867,1345,10526,0.00142325,{"type":14,"value":3869,"toc":3890},[3870,3874,3877,3880,3884,3887],[17,3871,3873],{"id":3872},"leak-debt-persists-for-years-undermining-platforms","Leak Debt Persists for Years, Undermining Platforms",[22,3875,3876],{},"Leaked secrets accumulate as 'leak debt,' remaining active long after exposure—transaction keys from 2022 continued processing payments undetected. Every platform accumulates this debt differently based on stack, but it kills security and reliability. The author shares hands-on experience eliminating 100+ live leaks across local development, CI\u002FCD pipelines, and production environments, revealing a universal pattern: sprawl leads to chaos until teams commit to zero tolerance.",[22,3878,3879],{},"Static secrets create ongoing risks because they expire unexpectedly or demand manual rotation, amplifying vulnerabilities. Platforms suffer uniquely—GitOps teams battle repo exposures, service meshes grapple with identity issues—but all chase the same outcome: secrets that self-manage without human intervention.",[17,3881,3883],{"id":3882},"ruthless-audit-and-prevention-path-to-zero-debt","Ruthless Audit and Prevention Path to Zero Debt",[22,3885,3886],{},"Transition from chaos requires three steps: discover the mess through comprehensive scans, audit ruthlessly to prioritize live threats (e.g., still-valid 2022 keys), and enforce prevention via dynamic tools. Teams adopt stack-specific solutions like HashiCorp Vault for centralized management, AWS or GCP Secrets Manager for cloud-native rotation, Sealed Secrets for GitOps, or SPIFFE for service meshes.",[22,3888,3889],{},"This isn't a generic checklist but proven patterns from production battles: replace static secrets entirely to eliminate leak debt. Outcomes include no leaks, automatic rotation, and zero manual interventions, securing platforms end-to-end. The content cuts off mid-journey but emphasizes sharing these learnings for peer teams facing identical sprawl.",{"title":97,"searchDepth":98,"depth":98,"links":3891},[3892,3893],{"id":3872,"depth":98,"text":3873},{"id":3882,"depth":98,"text":3883},[456],{"content_references":3896,"triage":3897},[],{"relevance":111,"novelty":112,"quality":111,"actionability":111,"composite":113,"reasoning":3898},"Category: DevOps & Cloud. The article addresses a specific pain point regarding the management of leaked secrets, which is crucial for maintaining security in AI-powered products. It provides actionable steps for auditing and preventing leak debt, making it relevant for developers and product builders.","\u002Fsummaries\u002F71dc58e232e9091c-zero-leak-debt-kill-100-leaked-secrets-platform-wi-summary","2026-04-15 14:55:38","2026-04-15 15:38:58",{"title":3862,"description":97},{"loc":3899},"71dc58e232e9091c","https:\u002F\u002Flevelup.gitconnected.com\u002Fmost-leaked-secrets-live-for-years-the-hidden-leak-debt-killing-your-platform-47e74da51697?source=rss----5517fd7b58a6---4","summaries\u002F71dc58e232e9091c-zero-leak-debt-kill-100-leaked-secrets-platform-wi-summary",[128,129],"Leaked secrets from 2022 still process payments as 'leak debt'; ruthlessly audit across local dev, CI\u002FCD, and production to reach zero static secrets that never leak, expire unexpectedly, or need manual rotation.",[],"vQXjNu8RKmXyJRZqlJVXzlosWzob2FyNxRtplwh2n3E",{"id":3912,"title":3913,"ai":3914,"body":3919,"categories":3955,"created_at":105,"date_modified":105,"description":97,"extension":106,"faq":105,"featured":107,"kicker_label":105,"meta":3956,"navigation":115,"path":3970,"published_at":3971,"question":105,"scraped_at":3971,"seo":3972,"sitemap":3973,"source_id":3974,"source_name":3975,"source_type":123,"source_url":3976,"stem":3977,"tags":3978,"thumbnail_url":105,"tldr":3980,"tweet":105,"unknown_tags":3981,"__hash__":3982},"summaries\u002Fsummaries\u002Fa2a811b50a4c64f5-mrc-resilient-networking-for-100k-gpu-ai-training-summary.md","MRC: Resilient Networking for 100K+ GPU AI Training",{"provider":7,"model":8,"input_tokens":3915,"output_tokens":3916,"processing_time_ms":3917,"cost_usd":3918},9014,2044,25377,0.0028023,{"type":14,"value":3920,"toc":3949},[3921,3925,3928,3932,3935,3939,3942,3946],[17,3922,3924],{"id":3923},"multi-plane-topologies-slash-switch-tiers-and-power-for-massive-clusters","Multi-Plane Topologies Slash Switch Tiers and Power for Massive Clusters",[22,3926,3927],{},"Traditional 800Gb\u002Fs networks require three or four tiers of switches to connect over 100,000 GPUs, increasing power use, failure points, and cost. MRC splits each 800Gb\u002Fs interface into eight 100Gb\u002Fs links, creating eight parallel 'planes' that connect to separate switches. A 64-port 800Gb\u002Fs switch now handles 512 ports at 100Gb\u002Fs, enabling full connectivity for 131,000 GPUs using only two tiers. This design boosts path diversity—keeping more traffic local to Tier 0 switches—while cutting components, power, and cost compared to single-plane setups. Without changes, single-path flows (like classic RoCE) still congest links as flows collide, especially in AI's collective communications where worst-case latency stalls synchronous training.",[17,3929,3931],{"id":3930},"packet-spraying-and-srv6-eliminate-congestion-and-dynamic-routing","Packet Spraying and SRv6 Eliminate Congestion and Dynamic Routing",[22,3933,3934],{},"MRC sprays packets from a single transfer across hundreds of paths spanning all planes, using final memory addresses for out-of-order reassembly at the destination. Adaptive load-balancing monitors paths: congestion triggers path swaps, packet loss retires the path (with probes for recovery), and 'packet trimming' at switches forwards headers only during destination congestion to prompt retransmits without false failure alarms. This achieves microsecond failure detection and rerouting, versus seconds for traditional fabrics. MRC replaces BGP dynamic routing with static SRv6 source routing: senders embed full switch ID sequences in IPv6 addresses. Switches shift addresses and follow pre-configured static tables, blindly forwarding without recomputing routes. Failures simply retire paths at endpoints, simplifying control planes and eliminating routing bugs from switch software.",[17,3936,3938],{"id":3937},"production-impact-zero-measurable-downtime-amid-constant-failures","Production Impact: Zero-Measurable Downtime Amid Constant Failures",[22,3940,3941],{},"In OpenAI's NVIDIA GB200 supercomputers (including OCI's Abilene Stargate site and Microsoft's Fairwater), MRC handles millions of links with frequent flaps—multiple per minute between tiers—yet synchronous pretraining jobs show no measurable impact, allowing deferred repairs. Rebooting four Tier-1 switches or repairing links during jobs requires no coordination; MRC avoids bad paths automatically. Real training data shows quick recovery from full T1 switch loss with temporary slowdowns far less than physical capacity loss (e.g., one failed port on an 8-port interface reduces max rate by 1\u002F8th but sustains better effective throughput via path recalculation). Multi-job clusters avoid inter-job interference due to core-wide congestion elimination, maximizing GPU utilization for frontier models like those powering ChatGPT (900M weekly users).",[17,3943,3945],{"id":3944},"strategic-wins-simpler-stacks-for-stargate-scale-compute","Strategic Wins: Simpler Stacks for Stargate-Scale Compute",[22,3947,3948],{},"MRC delivers three edges: two-tier multi-plane redundancy with lower power; zero core congestion for consistent flow throughput in sync training; and SRv6 for instant failure bypass via static planes. Deployed with AMD, Broadcom, Intel, Microsoft, NVIDIA hardware, it's released via Open Compute Project for industry adoption, supporting OpenAI's compute strategy of shared standards to scale AI infrastructure efficiently.",{"title":97,"searchDepth":98,"depth":98,"links":3950},[3951,3952,3953,3954],{"id":3923,"depth":98,"text":3924},{"id":3930,"depth":98,"text":3931},{"id":3937,"depth":98,"text":3938},{"id":3944,"depth":98,"text":3945},[456],{"content_references":3957,"triage":3967},[3958,3963],{"type":3959,"title":3960,"url":3961,"context":3962},"other","OCP MRC 1.0","https:\u002F\u002Fwww.opencompute.org\u002Fdocuments\u002Focp-mrc-1-0-pdf","mentioned",{"type":3964,"title":3965,"url":3966,"context":3962},"paper","Resilient AI Supercomputer Networking using MRC and SRv6","https:\u002F\u002Fcdn.openai.com\u002Fpdf\u002Fresilient-ai-supercomputer-networking-using-mrc-and-srv6.pdf",{"relevance":112,"novelty":112,"quality":111,"actionability":98,"composite":3968,"reasoning":3969},3.05,"Category: DevOps & Cloud. The article discusses the MRC protocol's innovative networking solutions for AI training, which could be relevant for those building AI-powered products. However, it lacks direct actionable insights for the audience, focusing more on technical specifications than practical applications.","\u002Fsummaries\u002Fa2a811b50a4c64f5-mrc-resilient-networking-for-100k-gpu-ai-training-summary","2026-05-11 15:04:27",{"title":3913,"description":97},{"loc":3970},"a2a811b50a4c64f5","OpenAI News","https:\u002F\u002Fopenai.com\u002Findex\u002Fmrc-supercomputer-networking","summaries\u002Fa2a811b50a4c64f5-mrc-resilient-networking-for-100k-gpu-ai-training-summary",[3979,128,129],"machine-learning","OpenAI's MRC protocol uses multi-plane topologies and packet spraying across hundreds of paths with SRv6 source routing to eliminate congestion, route around failures in microseconds, and connect 131k GPUs with just two switch tiers, enabling non-stop frontier model training.",[],"BYXvfLzxxajQIir95xuUTVdTfvID4wPt3TOVHNxrCSU"]