夏锐航-PromQL Got a Boost：用 Rust 重写 Prometheus 的查询引擎.pdf

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1、PromQL Got a BOOST主讲人：Ruihang,GreptimePromQL Got a BOOST:用 Rust 重写 Prometheus 的查询引擎演讲嘉宾介绍Ruihang GreptimeGitHub:waynexiaLosing hair at GreptimeWanna sleep 10 hrs/dayLearn JS every yearHealing the HyruleCONTENT目录2023K+01Backgroundthe Parser the Engine0203Rust Gives04Outlook05Part 01Background About P

2、rometheus and PromQL Why rewrite?What are boosted?PROMETHEUS AND PROMQLThe de facto standard in cloud-native monitor scenarioHas its own query language called“PromQL”rate(api_request_durationhost=“foo”5m)More than a monitor:alert,visualize with many integrationsPROMETHEUS AND PROMQLrate(api_request_

3、durationhost=“foo”5m)OperatorDataFilterRangeSELECT rate(val)OVER(ORDER BY timestamp RANGE BETWEEN 5 minutes PRECEDING AND CURRENT ROW )AS rateFROM api_request_durationWHERE host=fooOURShttps:/ Database(cloud-native,hybrid-workload,distributed)SQL and table modelRead more about GreptimeCloud:https:/

4、REWRITETarget to be the most powerful drop-in replacementPromQL has a good UX for time-series dataAnd it can be better if combine with SQLRIIR,super cooooooool!WHAT ARE BOOSTEDWHAT ARE BOOSTEDPROMQL VIA SQL(1)prepare data using SQL(2)write your PromQL!Part 02the Parser Tech stack Out choiceOUR CHOIC

5、Elrpar-generator,yacc compatiblePromQL has replaced its hand-written parser with yaccBut there are still many slight differencesYACC FILEHOW TO CHOOSEBased on the scenario and pre-requirementE.g.:sqlparser-hand-written combinator nom81,000,000+combinatorpestcombinelalrpop37,500,000+21,700,000+5,500,

6、000+generatorcombinatorgeneratorDownloadsMethodCrateERROR HANDLINGTerminal v.s.textchumsky,nom,winnow?Still exploring Part 03the Engine Which way to rewrite?Apache Arrow&DataFusion Diff between modelsREWRITEAround 1/7 of Prometheus is PromQLA straightforward 3-layer structure Tra