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: #saturnus
@MOONIVRSE · Post #49201 · 02.05.2023 г., 12:28
💥💥#Saturnus called Cardigan, Taylor Swift from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #49198 · 02.05.2023 г., 12:22
💥💥#Saturnus called Tak Ingin Usai, Keisya Levronka from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #49195 · 02.05.2023 г., 12:21
💥💥#Saturnus called Tak Segampang Itu, Anggi Marito from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #49192 · 02.05.2023 г., 12:15
💥💥#Saturnus called Sampai Jadi Debu, Banda Neira from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #48506 · 31.03.2023 г., 09:56
https://t.me/addtheme/uqKFF4Qom9DRfkBh 👩🏻🚀💄: *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 #Saturnus called " Wonyoung Theme " from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Awäa💄. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #47769 · 13.02.2023 г., 11:37
👩🏻🚀💄: *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 #Saturnus called " Newjeans Minji Username " from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Awäa l. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #47766 · 13.02.2023 г., 11:36
👩🏻🚀💄: *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 #Saturnus called " Truffle Username " from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Awäa l. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #47592 · 09.02.2023 г., 12:26
💥💥#Saturnus called I Wanna Be Yours, Arctic Monkey from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #47589 · 09.02.2023 г., 12:24
💥💥#Saturnus called Hold It In, Treasure from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦 which is #Awäa💄 just arrived! ★✩★ 𝘭𝘪𝘵𝘵𝘭𝘦 𝘯𝘰𝘵𝘦! ✧˚ 𓂃 If you like this song, thank you and also please don't repost. if you want to repost please send your permission to @Tembush before you repost.
@MOONIVRSE · Post #48596 · 02.04.2023 г., 00:17
👩🏻🚀🌙: *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 #Saturnus called Haerin icons edit from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Réuvel. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #48592 · 02.04.2023 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 #Saturnus called Eunchae icons edit from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Réuvel. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)
@MOONIVRSE · Post #48586 · 02.04.2023 г., 00:04
👩🏻🚀🌙: *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 #Saturnus called Seeun icons edit from our 𝗳𝗿𝗶𝗲𝗻𝗱𝘀 👨👩👧👦, which is #Réuvel. Ah, thank you @moonivrse lets check the licence first! Oh, its only for PU (Personal Use)