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4 - 5 December 2024 | Geneva, Switzerland
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Thursday, December 5
 

16:50 CET

Cost-Effective, Dense, and Performant Prometheus Storage via QLC - Anthony D'Atri, Dreamsnake Productions
Thursday December 5, 2024 16:50 - 17:25 CET
Prometheus is the metrics ecosystem of choice for modern computing, with exporters for Ceph, RAID HBAs, Redfish, time synchronization, and the panoply provided by node_exporter. Exporters are scraped multiple times per minute for effective queries, each ingesting as many as several housand metrics per system. Data may be kept locally or in external solutions including Ceph RGW. Retention of a year or more is valuable for trending and comparisons. A moderate-size deployment can easily fill tens or hundreds of terabytes. As retention and cardinality grow, so does processing. Prometheus will GC and flush its WAL every two hours, which can manifest visible yet spurious artifacts in visualization tools like Grafana and false alarms from alertmanager rules. Rotational media just don't cut it. While HDDs of capacities as large as 30TB are available, rotational + seek latencies, SATA stenosis, interminable resilvering, and SMR severely limit their viability. SSDs are increasingly viable as HDD replacements. We can improve cost and density by tailoring to the workload: intermittent sequential writes, and frequent random reads. This is a classic workload for modern QLC SSDs.
Speakers
avatar for Anthony D'Atri

Anthony D'Atri

Principled Engineer, Dreamsnake Productions
Anthony has run Ceph at scale for over eleven years and one can say that it is literally a part of him - ask him in person and he'll show you why. He is also an observability advocate and contributes daily to Ceph documentation and may be open to new opportunities.
Thursday December 5, 2024 16:50 - 17:25 CET
Auditorium C
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