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Изворен канал @pythonotes · Post #269 · 7 јул.

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Возможно, стоит пояснить разницу между синхронизацией из thread/process-safe и синхронизацией с помощью Lock🤔 Наша задача — заставить разные процессы и потоки обращаться к базе данных (или любым другим ресурсам) последовательно. Чтобы не случилось так называемого race condition, то есть состояние гонки. Это когда разные потоки или процессы пытаются одновременно что-то сделать с одним и тем же ресурсом. В этом случае нам нужна какая-то логика ограничения. Пока один процесс не завершил своё действие, другие не могут получить доступ к ресурсу. Так вот, thread-safe и process-safe означает что отдельно взятые операции записи в БД гарантированно будут последовательны. Запросы из разных процессов или потоков выстроятся в очередь и не будут мешать друг другу. Лучше всего когда этот блок реализован на уровне БД в виде атомарных операций или ещё как-то. Но зачем нам тогда еще дополнительный Lock? Этот способ синхронизации используется когда процесс никак не укладывается в одно действие и должен сделать множество операций прежде чем дать доступ следующему. В этом случае процесс ставит некий глобальный Lock на ресурс и никто другой, даже получив законное право на доступ, не может ничего сделать. Все ждут пока этот Lock не будет снят. Это решается на уровне приложения и правильность реализации полностью в вашей ответственности. Например, если забыли разблокировать или сделали перекрёстный Lock (Deadlock как на картинке), то всё зависнет в бесконечном ожидании. #basic

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Пронајдени 87 слични објави

Пребарај: #wat

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@ssbclear · Post #9853 · 07.02.2026 г., 02:50

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wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Crisis Education Women Fitness Justice Law Sacrifice

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@ssbclear · Post #9847 · 06.02.2026 г., 02:50

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wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Leader Alone Friend Courage Obstacle Time Nation

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@ssbclear · Post #9841 · 05.02.2026 г., 02:50

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wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Fear Command Influence Courage Stress Risk Challenge

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@ssbclear · Post #9835 · 04.02.2026 г., 02:50

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wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Soldier War Mother Success Abide Allow Danger

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@ssbclear · Post #9830 · 03.02.2026 г., 02:50

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wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Learn Hard work Criticism Bold Team Ability

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@ssbclear · Post #9820 · 01.02.2026 г., 03:29

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#wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Energy Romance Boyfriend Father Deep

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@ssbclear · Post #9813 · 31.01.2026 г., 03:27

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#wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Revise Ahead Thought Adopt Practice

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@ssbclear · Post #9809 · 30.01.2026 г., 03:27

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#wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Legend Sight Sequence Sweet Simmer

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@ssbclear · Post #9804 · 29.01.2026 г., 03:28

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#wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Refine Answer Time Queen Shallow

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@ssbclear · Post #9797 · 28.01.2026 г., 03:25

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#wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Cloud Brave Crook Sad Aware

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@ssbclear · Post #9791 · 27.01.2026 г., 03:25

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#wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Safe Joy Mingle Mercy Follow

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@ssbclear · Post #9784 · 26.01.2026 г., 03:20

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#wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: #wat@ssbclear ⚔️WAT Challenge⚔️ Write sentences— 15 seconds or less for each. 📝Write & Review! ▹ Drop your responses below. ▹ Review at least 2 fellow responses with constructive feedback. Let’s sharpen our thinking and expression— together. 💬🧠 Everyone reviews, everyone gets reviewed!💪🔥 🔤Today’s Words: Above Sink Depression Crime Amount

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