neprihlásený Utorok, 4. augusta 2020, dnes má meniny Dominik, Dominika
Ubuntu pred vydaním 20.04 LTS výrazne zoptimalizovalo podporu ZFS

Značky: Ubuntu

DSL.sk, 16.4.2020


Tvorcovia populárnej linuxovej distribúcie Ubuntu pred blížiacim sa vydaním novej verzie Ubuntu 20.04 LTS výrazne zoptimalizovali podporu súborového systému ZFS.

Upozornil na to linuxový Phoronix.

Ubuntu 20.04 bude podporovať inštaláciu na pokročilý súborový systém ZFS, hoci štandardnou voľbou zostáva samozrejme použitie Ext4.

Podľa informácií z marca bude Ubuntu 20.04 v prípade inštalácie na ZFS pri aktualizácii operačného systému respektíve pri akýchkoľvek operáciách s balíčkami systémom APT vytvárať snapshoty súborového systému. To sa umožní jednoducho vrátiť k predchádzajúcemu stavu operačného systému najmä v prípade problémov.

Takýmto spôsobom ale vznikne veľký počet snapshotov a doterajšia verzia mala problém s výkonom pri veľkom počte snapshotov. Napríklad načítanie menu trvalo bootloaderu Grub v prípade 100 systémových snapshotov až 80 sekúnd.

Aktuálne optimalizácie vyriešili tieto problémy a načítanie je teraz aj v takomto prípade okamžité.

ZFS je pokročilým copy-on-write súborovým systémom s podporou pre snapshoty, kontrolné sumy zabezpečujúce integritu dát, kompresiu, deduplikáciu, synchronizáciu a ďalšie pokročilé funkcie vrátane integrovaných funkcií správcu zväzkov s podporou redundancie a využívanie viacerých diskov v podobe rozličných RAID režimov.

ZFS On Linux je štandardne zahrnutý a podporovaný v Ubuntu od verzie 16.04, základná experimentálna podpora inštalácie root súborového systému na ZFS pribudla v desktopovej edícii vo verzii 19.10. Pokročilejšia funkčnosť je pridávaná postupne v nástroji Zsys.

Finálna verzia Ubuntu 20.04 LTS je naplánovaná na 23. apríla, ide o LTS verziu s dlhou päťročnou štandardnou podporou a ďalšou päťročnou rozšírenou bezpečnostnou podporou.


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Diskusia:
                               
 

A kedy sa snapshoty zmazu? Ak nikdy, tak raz dojde disk.
Okrem toho restore snapshotu bude neprijemny. Ubuntu aspon nedavno odporucalo iba jednu particiu pre vsetko (okrem /tmp). Takto uzivatel lahko strati data, ak vrati snapshot.
Odpovedať Známka: 0.0 Hodnotiť:
 

Ubuntu ma /tmp na disku? Nepouziva tmpfs ako vsetci ostatni?
Odpovedať Známka: -3.3 Hodnotiť:
 

Akoze vsetci ostatni popri /dev/shm vytvaraju preventivne priekazne rovnake /tmp?
Odpovedať Známka: -1.4 Hodnotiť:
 

zmažeš ich ručne: sudo apt autoremove
Odpovedať Známka: -10.0 Hodnotiť:
 

ZFS mám na jednej partícii (raidz1 na 3 diskoch), tá obsahuje (u mňa) cca 20 subvolumes. Snapshot nezaberá takmer žiaden priestor pokiaľ sa nemenia dáta, takže ich môžem mať koľko chcem. Snapshoty má každá subvolume svoje, takže keď si vytvoríš subvolume pre /home o žiadne dáta neprídeš.

Odpovedať Známka: 10.0 Hodnotiť:
 

mozno pridali na filesystem stratovu kompresiu pre snapshoty, cize sa kde-tu tisko stratia a bezi to rychlejsie :)
Odpovedať Známka: 0.0 Hodnotiť:
 

integrovali Jarvisa, on to riadi :)
Odpovedať Známka: -6.7 Hodnotiť:
 

Počuje ešte niekto ten tichý hlások, šepotajúci:" Netreba panikáriť. Prvá bezpečnostná aktualizácia nastaví hodnotu okamžité priekazne na 80 sekúnd."?
Odpovedať Známka: -2.9 Hodnotiť:
 

Pridanim Zeleno-Fialoveho smetia do Lastury Tropickeho Slimaka priekazne zvysuje entropiu nafoteneho porna sidliaceho v tej bedni co mas na stole.

Je to vynikajuce a treba to podporit!
Odpovedať Známka: -8.0 Hodnotiť:
 

A kedy bude verzia pre aborigeňov?
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Pojde cez to tlacit vo velkom kancli cez wifi?
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v detskej izbe cez USB kabel
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