Sysadmin Tools 🇺🇦
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Sysadmin/DevOps tools, news and other interesting things from modern IT world.
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https://copy.fail

Most Linux LPEs need a race window or a kernel-specific offset.
Copy Fail is a straight-line logic flaw — it needs neither.
The same 732-byte Python script roots every Linux distribution shipped since 2017.


#linux #kernel #cve
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Firnflow

The cost efficiency of S3 with the speed of local RAM. A multi-tenant vector and full-text search engine featuring a tiered RAM → NVMe → S3 architecture for microsecond latency on top of object storage

https://github.com/gordonmurray/firnflow

#rust #s3 #fulltextsearch
30x faster than Prometheus: How we rebuilt Elasticsearch as a leading columnar metrics datastore

https://www.elastic.co/search-labs/blog/elasticsearch-columnar-metrics-engine-30x-faster-prometheus

#elasticsearch #clickhouse #mimir #prometheus #tsdb
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We replaced Redis with MySQL for inventory reservations—and it scaled

https://shopify.engineering/scaling-inventory-reservations

#mysql #redis #shopify
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Nanotdb

Single-binary observability, time-series database, and built-in dashboard for Raspberry Pi, edge devices, and local metrics.


https://github.com/aymanhs/nanotdb

#timeseries #db #monitoring #observability
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Warpgate

Fully transparent SSH, HTTPS, Kubernetes, MySQL and Postgres bastion/PAM that doesn't need additional client-side software.


https://github.com/warp-tech/warpgate

#wireguard #ssh #security #firewall #vpn
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Deploying k3s on Hetzner Cloud on Private Network with Cluster Autoscaling

https://community.hetzner.com/tutorials/deploy-k3s-on-hetzner-with-autoscaling

#k8s #kubernetes #k3s #hetzner #cloud
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From ClickHouse to RocksDB: How We Rebuilt Solana’s Archival Layer

https://www.helius.dev/blog/migrating-from-clickhouse-to-rocksdb

#clickhouse #rockdb
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Forwarded from Max K
We’re excited to introduce opensource vmestimator, a new component in the VictoriaMetrics ecosystem.

vmestimator measures metrics cardinality across arbitrary label dimensions and exposes the results as Prometheus-compatible metrics. It helps to understand where cardinality comes from, track how it evolves over time, and build early-warning alerts before cardinality becomes a problem.

If you’re operating Prometheus-compatible monitoring systems and want realtime visibility into metric cardinality, give vmestimator a try. We’d love to hear your feedback and learn more about your use cases.

Read more about its design and configuration in the documentation, or explore it yourself in the playground.
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ArcadeDB

Multi-Model Database, one DBMS that supports SQL, Cypher, Gremlin, HTTP/JSON, MongoDB and Redis. ArcadeDB is a conceptual fork of OrientDB, the first Multi-Model DBMS. ArcadeDB supports Vector Embeddings.


https://github.com/ArcadeData/arcadedb

#observability #monitoring #logs #metrics #tsdb #sql #nosql