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: #lassafeverinfo
@ncdcgov · Post #3871 · 22.06.2023 г., 12:02
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 23). This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #3866 · 16.06.2023 г., 09:08
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 22). This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #3741 · 20.02.2023 г., 14:43
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 6). In this reporting week, a total of 68 confirmed cases were recorded. This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #3725 · 10.02.2023 г., 17:25
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 4). This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #3704 · 24.01.2023 г., 18:09
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 2). This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #3649 · 16.12.2022 г., 14:48
#Lassafeverinfo Our latest Lassa Fever Situation Report has been published on our website (week 49). This week's situation report and that of previous weeks can be downloaded via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria
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@ncdcgov · Post #4416 · 25.10.2024 г., 11:05
In total for 2024, 1035 confirmed cases of #LassaFever have been recorded across 28 States in Nigeria. 🔗Download, read, and share our latest #LassaFever situation report via: https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria #LassaFeverInfo
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@ncdcgov · Post #4406 · 11.10.2024 г., 14:38
In total for 2024, 1018 confirmed cases and 172 deaths of #LassaFever have been recorded across 28 States in Nigeria. 🔗Download, read, and share our latest #LassaFever situation report via: https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria #LassaFeverInfo
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@ncdcgov · Post #4389 · 25.09.2024 г., 12:24
In total for 2024, 1005 confirmed cases of #LassaFever have been recorded across 28 States in Nigeria. 🔗Download, read, and share our latest #LassaFever situation report via: https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%20in%20Nigeria #LassaFeverInfo
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@ncdcgov · Post #4282 · 20.05.2024 г., 14:17
In this week's #LassaFever situation report, we provide a summary of the epidemiological situation and response activities in Nigeria. 🔗Download, read, and share via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%ll20in%20Nigeria #LassaFeverInfo
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@ncdcgov · Post #4271 · 08.05.2024 г., 14:38
In this week's #LassaFever situation report, we provide a summary of the epidemiological situation and response activities in Nigeria. 🔗Download, read, and share via https://ncdc.gov.ng/diseases/sitreps/?cat=5&name=An%20update%20of%20Lassa%20fever%20outbreak%ll20in%20Nigeria #LassaFeverInfo
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@ncdcgov · Post #4270 · 08.05.2024 г., 10:17
You can not be too safe! #Lassafever presents with symptoms similar to those of many illnesses like malaria. Healthcare workers are urged to always have a high index of suspicion and practice standard infection prevention and control measures when attending to patients. #LassafeverInfo
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