#Fault_Tolerance

Geekmaster πŸ‘½:system76:Geekmaster@ioc.exchange
2025-01-26

@adastra1930 good advice! #hybrid setups provide #fault_tolerance too. If the cloud provider goes down, or trunk connections are cut, or there's a massive public #DNS outage, or even a large-scale power outage - you can still have #authentication services, and some #connectivity with internally hosted sites and services. Plus, managing an on-prem Domain Controller gives we #sysadmins the control on routes and content delivery for our users and devices, and we can pivot quickly to recover services should the Internets take a massive shit. Of course, there are limits to what can be done today without some #cloud services in place, or even #electricity, but that's not the point here.

There are fewer and fewer of us anymore that actually know how to spec and build out a #physical_server for a target environment, let alone how to make it play well with clouds. And don't get me started on #n00b tech people's lack of understanding on how the #Internet actually functions. It's a lost art form anymore lol.

I still believe A+, and Networking Fundamentals (Level 1 & 2) courses should be required learning for anyone in computer science. Part of passing those courses should be building a PC, building a Server, and building a Network, from scratch. Then break/fix/break/fix until you "get it." We also need more #support for #n00bs landing #industry jobs with quality #leaders who actually #mentor them, making them better than they could be. Teaching these now older concepts of "on-prem" setups and the like.

Now, if I could just get my CEO to release the purse strings a bit, I could continue doing my part. But that's a whole other discussion lol.

#HUZZAH #HugASysadmin

2024-03-29

ΠŸΡ€ΠΎΠ΅ΠΊΡ‚ΠΈΡ€ΡƒΠ΅ΠΌ микросСрвисы с Reactive Manifesto

Π Π°Π±ΠΎΡ‚Π°Π΅Ρ‚Π΅ с распрСдСлСнными систСмами ΠΈΠ»ΠΈ Ρ‚ΠΎΠ»ΡŒΠΊΠΎ ΠΏΡ‹Ρ‚Π°Π΅Ρ‚Π΅ΡΡŒ ΠΊ Π½ΠΈΠΌ ΠΏΠΎΠ΄ΠΎΠ±Ρ€Π°Ρ‚ΡŒΡΡ? ΠŸΡ€ΠΎΠ΅ΠΊΡ‚ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ Ρ‚Π°ΠΊΠΈΠ΅ систСмы с нуля Π±Ρ‹Π²Π°Π΅Ρ‚ слоТно ΠΈ ΡΡ‚Ρ€Π°ΡˆΠ½ΠΎ: Ρ‡Ρ‚ΠΎΠ±Ρ‹ ΡƒΡ‡Π΅ΡΡ‚ΡŒ всС Π½ΡŽΠ°Π½ΡΡ‹, Π½ΡƒΠΆΠ΅Π½ ΠΎΠΏΡ€Π΅Π΄Π΅Π»Π΅Π½Π½Ρ‹ΠΉ Π±Π°Π³Π°ΠΆ Π·Π½Π°Π½ΠΈΠΉ. На ΠΏΠΎΠΌΠΎΡ‰ΡŒ ΠΏΡ€ΠΈΡ…ΠΎΠ΄ΠΈΡ‚ Reactive Manifesto β€” Π΄ΠΎΠΊΡƒΠΌΠ΅Π½Ρ‚, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹ΠΉ ΠΎΠ±ΠΎΠ±Ρ‰ΠΈΠ» ΠΎΠΏΡ‹Ρ‚ Ρ†Π΅Π»ΠΎΠ³ΠΎ ряда ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΉ ΠΏΠΎ созданию распрСдСлСнных систСм. ΠœΠ°Π½ΠΈΡ„Π΅ΡΡ‚ Ρ„ΠΎΡ€ΠΌΡƒΠ»ΠΈΡ€ΡƒΠ΅Ρ‚ Π³Π»Π°Π²Π½Ρ‹Π΅ ΠΏΡ€ΠΈΠ½Ρ†ΠΈΠΏΡ‹, Π½Π° ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ стоит ΠΎΠΏΠΈΡ€Π°Ρ‚ΡŒΡΡ Π½Π° этапС проСктирования ΠΈ эксплуатации Ρ‚Π°ΠΊΠΈΡ… систСм. МСня Π·ΠΎΠ²ΡƒΡ‚ АндрСй ВасилСвский, я систСмный Π°Ρ€Ρ…ΠΈΡ‚Π΅ΠΊΡ‚ΠΎΡ€ Π² Lamoda Tech. Π’ этой ΡΡ‚Π°Ρ‚ΡŒΠ΅ я Π½Π° ΠΏΡ€ΠΈΠΌΠ΅Ρ€Π°Ρ… ΠΈΠ· своСй Ρ€Π°Π±ΠΎΡ‚Ρ‹ ΠΏΠΎΠΊΠ°ΠΆΡƒ, ΠΊΠ°ΠΊ ΠΏΡ€ΠΈΠΌΠ΅Π½ΡΡ‚ΡŒ Reactive Manifesto Π½Π° ΠΏΡ€Π°ΠΊΡ‚ΠΈΠΊΠ΅. Π‘Ρ‚Π°Ρ‚ΡŒΡ Π±ΡƒΠ΄Π΅Ρ‚ ΠΏΠΎΠ»Π΅Π·Π½Π° Ρ‚Π΅ΠΌ, ΠΊΡ‚ΠΎ Ρ‚ΠΎΠ»ΡŒΠΊΠΎ Π½Π°Ρ‡Π°Π» ΠΈΠ·ΡƒΡ‡Π°Ρ‚ΡŒ распрСдСлСнныС систСмы, Ρ…ΠΎΡ‡Π΅Ρ‚ Π·Π°ΠΊΡ€Π΅ΠΏΠΈΡ‚ΡŒ Ρ‚Π΅ΠΎΡ€ΠΈΡŽ ΠΈΠ»ΠΈ Ρ‚Π΅ΠΌ, ΠΊΡ‚ΠΎ Ρ…ΠΎΡ‡Π΅Ρ‚ ΡΡ‚Ρ€ΡƒΠΊΡ‚ΡƒΡ€ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ ΠΏΡ€ΠΎΠ΅ΠΊΡ‚ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ микросСрвисов Π² своСй ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΈ.

habr.com/ru/companies/lamoda/a

#микросСрвисы #domain_driven_design #event_driven_architecture #system_design #architecture #saga #распрСдСлСнныС_систСмы #cap_theorem #fault_tolerance #guideline

TQI Exclusive: DARPA Sees Opportunities in Quantum Computing’s Complex Challenges thequantuminsider.com/?p=23613 #National #Research #DARPA #Defense_Advanced_Research_Projects_Agency #fault_tolerance #Mukund_Vengalattore #quantum #quantumdaily Insider Brief The Defense Advanced Research Projects Agency – DARPA – is actively investigating ways to unlock the transformative power of quantum computing. DARPA looks at the many technological hurdles of quantum computing not as obstacles, bu

2024-02-20

ΠœΠΈΡ„Ρ‹ ΠΈ Ρ€Π΅Π°Π»ΠΈΠΈ Β«ΠœΡƒΠ»ΡŒΡ‚ΠΈΠΌΠ°ΡΡ‚Π΅Ρ€Π°Β» Π² Π°Ρ€Ρ…ΠΈΡ‚Π΅ΠΊΡ‚ΡƒΡ€Π΅ Π‘Π£Π‘Π” PostgreSQL. Π§Π°ΡΡ‚ΡŒ. 1

ΠŸΡ€ΠΈΠ²Π΅Ρ‚, Π₯Π°Π±Ρ€! НСдавно ΠΌΡ‹ Π΄Π΅Π»Π°Π»ΠΈ Π΄ΠΎΠΊΠ»Π°Π΄ Π½Π° ΠΊΠΎΠ½Ρ„Π΅Ρ€Π΅Π½Ρ†ΠΈΠΈ HighLoad 2023 β€” Β«ΠœΠΈΡ„Ρ‹ ΠΈ Ρ€Π΅Π°Π»ΠΈΠΈ ΠœΡƒΠ»ΡŒΡ‚ΠΈΠΌΠ°ΡΡ‚Π΅Ρ€Π° Π² Π°Ρ€Ρ…ΠΈΡ‚Π΅ΠΊΡ‚ΡƒΡ€Π΅ Π‘Π£Π‘Π” PostgreSQLΒ». ΠœΡ‹ β€” это ПавСл ΠšΠΎΠ½ΠΎΡ‚ΠΎΠΏΠΎΠ² (@kakoka) ΠΈ ΠœΠΈΡ…Π°ΠΈΠ» Π–ΠΈΠ»ΠΈΠ½ (@mizhka), сотрудники ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΈ Postgres Professional . ПавСл занимаСтся Π°Ρ€Ρ…ΠΈΡ‚Π΅ΠΊΡ‚ΡƒΡ€ΠΎΠΉ построСния отказоустойчивых кластСров, Π° ΠœΠΈΡ…Π°ΠΈΠ» β€” Π°Π½Π°Π»ΠΈΠ·ΠΎΠΌ ΠΏΡ€ΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΡΡ‚ΠΈ Π‘Π£Π‘Π”. Π£ ΠΊΠ°ΠΆΠ΄ΠΎΠ³ΠΎ Π·Π° ΠΏΠ»Π΅Ρ‡Π°ΠΌΠΈ Π±ΠΎΠ»Π΅Π΅ дСсяти Π»Π΅Ρ‚ ΠΎΠΏΡ‹Ρ‚Π° Π² своСй области. ΠŸΠΎΡ€Π°ΡΡΡƒΠΆΠ΄Π°Π΅ΠΌ ΠΎ Ρ‚ΠΎΠΌ, ΠΊΠ°ΠΊ Ρ€Π°Π·Π²ΠΈΠ²Π°Π»Π°ΡΡŒ тСхнология Β«ΠœΡƒΠ»ΡŒΡ‚ΠΈΠΌΠ°ΡΡ‚Π΅Ρ€Β» Π² экосистСмС PostgreSQL, остановимся Π½Π° Ρ‚ΠΎΠΌ, Ρ‡Ρ‚ΠΎ ΠΎΠ½Π° ΠΈΠ· сСбя прСдставляСт, Π½Π° ΠΊΠ°ΠΊΠΈΡ… Π²Π½ΡƒΡ‚Ρ€Π΅Π½Π½ΠΈΡ… ΠΌΠ΅Ρ…Π°Π½ΠΈΠ·ΠΌΠ°Ρ… PostgreSQL основана ΠΈ ΠΊΠ°ΠΊ Π΅Ρ‘ ΠΌΠΎΠΆΠ½ΠΎ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΠΎΠ²Π°Ρ‚ΡŒ. ΠœΡ‹ Ρ‚Π°ΠΊΠΆΠ΅ ΠΏΠΎΠ³ΠΎΠ²ΠΎΡ€ΠΈΠΌ ΠΎ Ρ‚ΠΎΠΌ, сущСствуСт Π»ΠΈ «ЧСстный ΠœΡƒΠ»ΡŒΡ‚ΠΈΠΌΠ°ΡΡ‚Π΅Ρ€Β» (само понятиС «ЧСстный ΠœΡƒΠ»ΡŒΡ‚ΠΈΠΌΠ°ΡΡ‚Π΅Ρ€Β» достаточно спСцифично ΠΈ Π² основном употрСбляСтся Π² ΠΊΡ€ΡƒΠ³Ρƒ Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚Ρ‡ΠΈΠΊΠΎΠ²), ΠΊΠ°ΠΊΠΈΠ΅ Ρ€Π΅Π°Π»ΠΈΠ·Π°Ρ†ΠΈΠΈ Ρƒ Π½Π΅Π³ΠΎ Π΅ΡΡ‚ΡŒ ΠΈ ΠΊΠ°ΠΊ Π΅Π³ΠΎ слСдуСт ΠΏΡ€ΠΈΠΌΠ΅Π½ΡΡ‚ΡŒ.

habr.com/ru/companies/postgres

#postgresql #postgres_pro #Π±Π°Π·Π°_Π΄Ρ‹Π½Π½Ρ‹Ρ… #ΠΌΡƒΠ»ΡŒΡ‚ΠΈΠΌΠ°ΡΡ‚Π΅Ρ€ #рСпликация #availability #fault_tolerance #conflict_resolution #strong_consistency #tractor

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url: urn.kb.se/resolve?urn=urn%3Anb

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(1995) : Fabre, Jean-charles et al
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Making reliable distributed systems in the presence of software errors
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url: diva-portal.org/smash/record.j

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