颈尘辫进捗管理机能のアーキテクチャ
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2021-04-09 @ アドテク×アーキテクチャ オレシカナイト-オレシカナイトVol.15- https://cyberagent.connpass.com/event/204170/
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- 2. 坂本 泰規 ? AJA SSP サーバーサイドエンジニア ? ボードゲーマー ? 双剣使い ? ?? sambaiz https://www.sambaiz.net
- 3. 1. imp進 管理機能とは 2. 技术选定 3. 监视
- 4. imp進 管理機能とは
- 5. Imp進 管理機能 ? 案件のimpの出方を管理する機能 ? imp進 管理 予算管理 DSPは広告主にもらった予算を管理する SSPは？
- 6. Programatic Guaranteed (PG) ? PMP(Private Market Place)の一形態 Preferred Deal(PD): 対象のビッダーが優先的に落札できる Private Auction(PA): 対象のビッダーのみが入札できる ? imp数を保証する DSPは全量入札する前提 ? 期間全体に渡る配信 適切なペーシングを行う
- 7. 技术选定
- 8. 処理の概要 ? 時間単位で配信するimp数をペーシングする 現状は未配信imp数の均等割 + 前倒し係数による調整 ? 落札した際にペーシングした値を減らしていく 乖離は後で補正されます ? 0を下回ったらリクエストを止める
- 9. 選定基準 ? コスト ? スケーラビリティ キューで受けて非同期に集計する ? 集計レイテンシ ストリーミング集計
- 10. 比較対象 ? SQS 明示的にスケーリングをコントロールできない ? DynamoDB Streams 想定リクエストパターンとプロビジョニングキャパシ ティのオートスケールの相性が良くない オンデマンドキャパシティは割高でRCも効かない ? Kinesis Data Streams (採用)
- 11. Kinesis Data Streams (KDS) ? スケーラビリティに優れるストリーミングサービス 必要なリクエスト、トラフィックに対して確実に処理できるようにスケールできる ? 主にシャード時間に対する課金 ＋PUTペイロードユニット分 ? オートスケールしない ツールなどは提供されている ? 他のAWSサービスとの連携 DynamoDBからDynamoDB Streamsではなくこちらに送ることもできる https://docs.aws.amazon.com/ja_jp/amazondynamodb/latest/developerguide/ streamsmain.html
- 12. Kinesis Data Analytics (KDA) ? サーバーレスApache Flink SQLを書いてKDSと繋げるだけでストリーミング集計が行える 集計結果はStreamsやLambdaに送られる ? オートスケールするKPUに対する課金 最低1KPU課金される
- 13. 构成
- 14. 所感 ? マネージドサービスの宿命ではあるが、問題の原因調査が難しく感じる ? KDAの開発はマネコン上で行うと良さそう CDK(CFn)で構築するとプレビューが確認できずクエリのsyntax errorにも気付けない ちなみに、V2リソースだとマネコンで内容を見ることができない ? KDAのインフラコストが問題になる未来がある? 1KPU(1vCPU, 4GB) $0.142/hour > c4.large(2vCPU, 8GiB) $0.126/hour ? いずれにしてもKDSに送っておけばその後どうにでもなるのは気が楽
- 15. 监视
- 16. 监视 ? 標準のメトリクス + カスタムメトリクスを Datadogに送っている 各コンポーネント間のレイテンシなど ? 設定はTerraformで管理
- 17. 想定される障害 ? KDSのキャパシティ超過 ? RedisのOOM ? AWS AZ or リージョンの障害? etc.
- 18. 副系統 ? もう一個作っちゃうか
- 19. 技术选定Ⅱ
- 20. 選定基準 ? コスト 可用性が上がることによる利益 < インフラ + 運用コスト ? スケーラビリティ ? 集計レイテンシ
- 21. 比較対象 ? Managed Streaming for Apache Kafka (MSK) コールドスタンバイを試みたが、やはり立ち上がりに時間がかかる ? Glue (採用) 元々集計で使っている 2.0から数秒で起動するようになり、分単位でバッチジョブを実行できるようになった
- 22. 主系統 ? 副系統のスイッチ ? EventBridgeのDatadogインテグレーション アラートが発火したときにLambdaを実行して副系統のcronを有効にしている 現状ap-northeast-1では対応していない
- 23. 构成 主系統 副系統
- 25. 動作確認 ? 無事動作した 本番環境で? ? Fault Inject Simulator (FIS) がKinesisやElastiCacheに対応してくれるとう れしい
- 26. CM ? 求人です ? AJAでABEMAやアメブロなどに広告を配信するシステムを開発しませんか ? Go, TypeScript, React, PySpark, AWS, CDK, Terraform, Datadog, Java, Swift
- 27. ありがとうございました