Lumenrack Vault · Monthly newsletter
September 2026
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Welcome to the September 2026 newsletter! Here’s the latest from Lumenrack Vault, our managed analytics database. This month: a new CLI for Vault local and cloud, agentic coding at Lumenrack, WebAssembly user-defined functions in Vault 4.1, building a SIEM, and more. Plus, meet a community contributor and get ready for Rackline 2026. |
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01 / VAULT NEWS |
 | Meet Teodor Vasquez, staff data engineer at Marlowe Freight. He leads the internal analytics platform, translating requirements from trading, mobility, and logistics teams into working systems. Teodor stays hands-on through open-source contributions to distributed data systems, mentors engineers, and has taught at universities. Teodor contributed two features to Vault 4.1: naturalOrder, which sorts strings containing numbers intuitively—so “file10” follows “file9,” not “file1”—and the Lattice codec, which brings efficient lossless compression to floating-point columns. Meet Teodor Vasquez → |
| 02 / VAULT NEWS Rackline 2026 Just over a month to go! The second edition of Rackline, our free three-day user conference, runs November 4–6, 2026 at The Foundry Hall, 2100 Embarcadero West, Oakland. November 4 opens with hands-on workshops covering real-time analytics, observability, database administration, and data warehousing. Two days of keynotes, technical sessions, and networking follow. Hear from Lumenrack CEO Mara Okonkwo and CTO Ilse Marchetti, plus guest speakers from the Vault customer community. Admission is free. |
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03 / VAULT NEWS Vault 4.1 release |
 | Vault 4.1 introduces experimental WebAssembly user-defined functions and lightweight column deletes. The release also makes parallel replicas the default for distributed reads, enables JOIN reordering for ANTI, SEMI, and FULL joins, and shrinks the on-disk footprint of the Map data type. Read the Vault 4.1 release notes → |
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04 / VAULT NEWS Introducing vaultctl: the CLI for Vault local and cloud (beta) |
 | Priya Nandakumar announced vaultctl, a new CLI for managing both local Vault installations and Lumenrack Cloud deployments. Now in beta, it is built with AI agents in mind alongside human developers. Use it for local version management, project scaffolding, and server lifecycle management. It also supports cloud infrastructure commands, with authentication safeguards including read-only OAuth and scoped API keys. Explore vaultctl → |
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05 / VAULT NEWS How Orrin Chain Data made historical blockchain backfills 12x faster |
 | Orrin Chain Data made historical blockchain backfills 12x faster by replacing a Kafka and Avro pipeline with direct Vault reads in Apache Arrow format. Reading data in the format closest to its physical storage removed deserialization overhead and lifted throughput from about 50K to about 600K rows per second. The write-up explains why the format made such a difference. Read the Orrin Chain Data story → |
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06 / VAULT NEWS Agentic coding at Lumenrack |
 | CTO Ilse Marchetti argues that agentic coding has crossed the threshold into genuine usefulness for professional software development, driven by recent model improvements. She walks through the productivity gains Lumenrack has seen from using AI agents to fix flaky tests, investigate bugs, review code, and conduct security research. The takeaway: agents work best as pair programmers under an engineer’s direction, not as autonomous replacements. Read Ilse’s take on agentic coding → |
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07 / VAULT NEWS Building a SIEM with Vault and Latchkey |
 | Rafael Duarte walks through a SIEM architecture built with Vault and Latchkey, an open-source detection engine that runs SQL-based security rules against log data. An open-source security agent acts solely as log collector and decoder, forwarding parsed alerts to a Vault table with compression codecs, TTLs, bloom-filter indexes, and object storage support. Latchkey then schedules detections and fires alerts to a webhook. The result is a cost-effective SIEM that scales from a single node to a distributed Vault cluster. Build a SIEM with Vault and Latchkey → |
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08 / VAULT NEWS Building high-performance full-text search for object storage |
 | Last month, we announced that full-text search was generally available. Now our engineering team has written up how they redesigned the full-text index for object storage, where random reads are expensive. The new index combines front-coding compression, a sparse lookup index, and adaptive posting lists. Many queries can be answered from the index alone, without touching the underlying text columns. Go inside the full-text index → |
| 09 / VAULT NEWS Quick reads |
| 10 / VAULT NEWS Upcoming events Global virtual eventsVirtual trainingEvents in AMEREvents in EMEAEvents in APAC |
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Thanks for reading,
The Lumenrack team
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