TGINSIGHT SIMILAR POSTS
Изворен канал @pythonotes · Post #269 · 7 јул.
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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Пребарај: #revaya
@MOONIVRSE · Post #49110 · 24.04.2023 г., 12:21
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "Kyujin" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #49107 · 24.04.2023 г., 04:58
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "Yeri" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #49104 · 24.04.2023 г., 04:51
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "Karina" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #49101 · 24.04.2023 г., 03:07
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "Chaewon" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #49098 · 24.04.2023 г., 03:04
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "Bae" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #49095 · 24.04.2023 г., 02:57
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "Sullyoon" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #49092 · 24.04.2023 г., 00:08
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "J STAYC" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #49089 · 24.04.2023 г., 00:05
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "jihoon" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #49086 · 24.04.2023 г., 00:02
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "Minji" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #49083 · 23.04.2023 г., 19:25
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "So Junghwan" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #49080 · 23.04.2023 г., 19:03
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "Ryujin" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #49077 · 23.04.2023 г., 18:21
👩🏻🚀🌧: *𝗕𝗢𝗢𝗠* 🤯🤯 Woah 😵💫😵... What was that 🤔🤔? Its was a super-duper big *boom* 💥💥 that just come to our 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝗺𝗼𝗼𝗻 🌑🌕, and look. They giving us a super-duper adorable 𝗽𝗮𝗰𝗸𝗮𝗴𝗲 📦📦, lets check it now! Ooh 😯😯, its a #Space called "Soobin" from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #revaya . Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)