Lock Management At Microservice Applications

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Lock Management At Microservice Applications Ahmet Pirimoğlu Software Team Lead

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Ahmet Pirimoğlu • 2006 yılından beri yazılım geliştirici • 15+ yıldır farklı sektörlerde • Finans Çözümleri • Yükseköğretim Çözümleri • Genellikle yazılım altyapı ekiplerinde • Yaklaşık 3 yıldır Dgpays • Şu an “Core Banking" projesinin yazılım altyapı takımında "Yazılım Takım Lideri"

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Agenda •Concurrency •Lock Types •Database Locks •Distributed Locks •Pros / Cons

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Concurrency

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Uygulama Katmanları ve Lock Kullanımı Persentation Application Database

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Database Locks 6

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Database Lock Types •Table-Level Lock •Page-Level Lock •Row-Level Lock

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Data Locking Read Lock Write Lock Row Lock Table Lock

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Lock Types Optimistic Locking Pessimistic Locking

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Lock Types Optimistic Locking Pessimistic Locking • Aynı kayıt üzerinde güncelleme yapmaya izin verir • Ancak bir işlem başarılı olur • Diğer işlemler için conflict cevabı dönülür • Kitleme sayısı az işlemler için anlamlı, yoksa kullanıcı sürekli hata alacaktır • Sadece bir işlem güncelleme yapabilir • Diğer işlemler ana işlem işini bitirene kadar bekler • Uzun süren işlemler için sorun oluşturabilir • Veri tutarlılığını garanti eder

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Optimistic Locking * https://www.martinfowler.com/eaaCatalog/optimisticOfflineLock.html

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Pessimistic Lock * https://www.martinfowler.com/eaaCatalog/pessimisticOfflineLock.html

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EF Optimistic Concurrency Lock Load Change Save Conflict

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EF Optimistic Concurrency DbUpdateConcurrencyException

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EF Optimistic Concurrency

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Distributed Lock Darp Üzerinden Redis Kullanımı

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Redis 17

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Redis is not reliable 18

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Redis Bunu Nasıl Yapıyor? RedLock Algorithm

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Dapr Nedir?

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Dapr Üzerinde Distributed Lock Kullanımı

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Dapr Üzerinde Kullanım (Örnek)

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Dapr Üzerinde Kullanım (Örnek)

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Dapr Üzerinde Kullanım (Örnek)

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DistributedLock Package Alternative Approach 26

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DistributedLock Package https://github.com/madelson/DistributedLock

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DistributedLock Package https://github.com/madelson/DistributedLock

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DistributedLock Package / Semaphores

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DistributedLock Package / Reader-writer lock

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Advisory Lock Database Level Distributed Lock 31

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Advisory Lock

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Advisory Lock

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Advisory Lock

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Advisory Lock

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Advisory Lock

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Advisory Lock Implementation

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Lock Problems •Lock fails to release it •Lock contention •Deadlock situation •Memory problems •Performance problems

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Teşekkürler [email protected] https://www.pirimoglu.com https://twitter.com/ahmetpirimoglu https://www.linkedin.com/in/ahmetpirimoglu

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Kaynaklar • https://medium.com/codeboulevard/serialize-access-to-a-shared-resource-in-distributed-systems-with-dlm-distributedlock-manager-5abf5e393e15 • https://erkanguzelkucuk.medium.com/ef-core-optimistik-concurrency-ve-lock-architecture-2d668cfed360 • https://medium.com/software-development-turkey/distributed-locking-92db5b3d4045 • https://softwareengineeringwk.substack.com/p/what-are-database-locks • https://softwareengineeringwk.substack.com/p/a-practical-guide-to-using-advisory • https://shiroyasha.io/advisory-locks-and-how-to-use-them.html • https://medium.com/inspiredbrilliance/a-practical-guide-to-using-advisory-locks-in-your-application-7f0e7908d7e9 • https://github.com/mpyw/laravel-database-advisory-lock • https://careers.saigontechnology.com/blog-detail/implement-distributed-lock-for-a-microservices-software-system • https://medium.com/codeboulevard/distributed-locks-manager-c-and-redis-fd3d86cd1250 • https://www.linkedin.com/posts/sahnlam_top-redis-use-cases-ive-used-redis-in-activity-7152188884104237056-2XO8/ • https://dev.to/lazypro/explain-redlock-in-depth-31jj