~/talks

Javier Ramirez

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Accelerating QuestDB: Lessons from a 6x Performance BoostBerlin Buzzwords 20252025-06-15
QuestDB (Apache‑2.0) moves from being 33× slower on ClickBench to roughly 3× and reports up to a 6x performance boost on some queries by adding SIMD-style…
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Process and analyze millions of events per second with open source toolsCodemotion Madrid 20252025-05-20
A practical walkthrough of building a high-throughput real-time analytics pipeline using open-source tools: Apache Kafka for event streaming, QuestDB for…
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What You've Missed by Staying on Java 8Nerdearla Mexico 20242024-11-07
Overview of key Java features added since Java 9 up to Java 23, covering language changes that make Java more functional, updates to standard library classes…
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Ingesting over 4 million rows a second on a single instanceBerlin Buzzwords 20232023-06-18
Claims ingesting over 4 million rows/sec on a single instance using QuestDB and a 16‑CPU benchmark; a live demo on an SSD Mac shows ~3.2M/sec. Implementation…
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Ingesting A Million Time Series Per Second On A Single InstanceBig Data LDN 20222022-09-21
Claimed ingest rate exceeds 1.4M rows/sec on a single instance while serving queries concurrently. Implementation details: a columnar, time‑partitioned engine…
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AWS On Air ft. Amazon InspectorAWS re:Invent 20212021-11-29
Reimagined Amazon Inspector runs continual vulnerability management across AWS, scanning EC2 via SSM agent and container images in ECR image scanning without…
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Push Your ML Model to Top Speed (AWS DeepRacer)AWS Summit Online América 20212021-05-12
AWS DeepRacer session about improving reinforcement learning models for racing by using human analysis of RL training logs. It covers examining training logs…
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Ledger Databases and Managed Blockchain in the CloudAWS Summit Online EMEA 20202020-09-01
Explains how Amazon QLDB provides a serverless, centralised ledger with an immutable cryptographically verifiable journal (SHA‑256 hashes chained across…
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Raw Data to Business Insights: What You Need to Build a Modern Data LakeAWS Summit Online EMEA 20202020-09-01
Practical playbook: catalog raw files on Amazon S3, run crawlers with AWS Lake Formation to auto-discover CSV/Parquet schemas and query them serverless with…
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Are Accounting Databases Interesting or Just Part of the Blockchain Hype?Commit Conf 20192019-11-22
Explains ledger databases that keep immutable, auditable histories of data changes and prevent tampering, highlighting Amazon Quantum Ledger Database (QLDB) as…
Talk in Spanish on
We Talk with Javier Ramírez about BlockchainCommit Conf 20192019-11-22
A conversation with Javier Ramírez about when to adopt blockchain, focusing on which client requirements or architectural problems make switching to blockchain…
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Cloud Platform for DevOps ProfessionalsDevOps Pro Vilnius 20162016-05-26
As you know the Google Cloud Platform has a comprehensive offer of services, so I will provide an overview of which of those are more interesting for DevOps. I…
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Everything you always wanted to know about highly available distributed databasesCodemotion Amsterdam 20162016-05-11
Explains how large systems partition with a 32-part ring or similar hash ranges, keep data on three replicas for quorum durability, and use gossip membership…
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IntervistaCodemotion Roma 20142014-04-09
Describes how teowaki.com helps developers share technical information, best practices, gossip and lifehacks and shows concrete integrations used to surface…
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Fun with Ruby and RedisArrrrCamp 20132013-10-03
Claims Redis serves as in‑memory data structures not just a cache and hits half a million inserts per second on one box; integration with Ruby uses…
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