{"id":94658,"date":"2020-09-19T13:42:15","date_gmt":"2020-09-19T11:42:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/red-hat-razvivaet-novuyu-fs-nvfs-effektivnuyu-dlya-nvm-pamyati"},"modified":"2020-09-19T13:42:15","modified_gmt":"2020-09-19T11:42:15","slug":"red-hat-razvivaet-novuyu-fs-nvfs-effektivnuyu-dlya-nvm-pamyati","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/red-hat-razvivaet-novuyu-fs-nvfs-effektivnuyu-dlya-nvm-pamyati","title":{"rendered":"Red Hat kehitt\u00e4\u00e4 uutta NVFS-tiedostoj\u00e4rjestelm\u00e4\u00e4, joka on tehokas NVM-muistille.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Mikul\u00e1\u0161 Pato\u010dka, \u00fcks LVM arendajatest ja mitme artikli autor leiutiste<\/a><\/noindex>, mis on seotud salvestuss\u00fcsteemide t\u00f6\u00f6 optimeerimisega, t\u00f6\u00f6tab Red Hat'is, esitles<\/a><\/noindex> Linuxi tuuma arendajate postitusloendis uue failis\u00fcsteemi NVFS<\/a><\/noindex>, mis on suunatud kompaktselt ja kiiresti t\u00f6\u00f6tava failis\u00fcsteemi loomisele energiakindlate m\u00e4lukiipide (NVM, non-volatile memory, n\u00e4iteks NVDIMM) jaoks, mis \u00fchendavad RAM-i j\u00f5udluse pideva andmesalvestamise v\u00f5imalusega. <\/p>\n

NVFSi arendamisel on arvesse v\u00f5etud NOVA<\/a><\/noindex>, mis loodi 2017. aastal spetsiaalselt NVM-m\u00e4lu jaoks, kuid ei j\u00f5udnud Linuxi tuuma koosseisu ja on piiratud<\/a><\/noindex> Linuxi tuumade toetusega alates 4.13 kuni 5.1.
\nEttepanek NVFS-i failis\u00fcsteem on oluliselt lihtsam kui NOVA (4972 koodirida v\u00f5rreldes 21459), pakub utiliiti fsck, omab k\u00f5rgemat j\u00f5udlust, toetab laiendatud atribuute (xattrs), turvemarke, ACL-i ja kvoote, kuid ei toeta snapshots. A\u0308r\u0308hitekktuur<\/a><\/noindex> NVFS on sarnane
\nExt4 failis\u00fcsteemile ja sobib h\u00e4sti VFS aluseks olevate failis\u00fcsteemide mudelisse, mis aitab minimeerida kihte ja kasutada moodulit, mis ei vaja tuuma plaastrite rakendamist.<\/p>\n

NVFS kasutab tuuma liideseid. DAX<\/a><\/noindex> otse parasjuurdep\u00e4\u00e4s seadmetele, mis kasutavad p\u00fcsiv\u00e4lu, vahepealse vahem\u00e4luta. NVM-m\u00e4lu optimeerimise jaoks, kus kasutatakse baitaadressimist, kuvatakse salvestusseadmest saadud sisu m\u00e4luriigi lineaarsetes aadressiruumides ilma traditsioonilise plokitaseme seadme ja vahepealse vahem\u00e4luta. Kataloogide sisu salvestamiseks kasutatakse aluspuud<\/a><\/noindex> (radix tree), kus iga faili nimi on hashitud ja hash-v\u00e4\u00e4rtust kasutatakse otsimisel puus.<\/p>\n

Andmete terviklikkust tagab mehhanism \u201esoft updates<\/a><\/noindex>\u201c (nagu UFS FreeBSD-s ja FFS OpenBSD-s) ilma ajakirjastamiseta. Failide kahjustamise v\u00e4ltimiseks NVFS-is r\u00fchmitatakse andmete muutmise operatsioonid nii, et kokkuvarisemine ei saa p\u00f5hjustada plokkide v\u00f5i inode'ide kaotust, ning struktuuride terviklikkus taastatakse utiliidi fsck abil. Utiliid fsck t\u00f6\u00f6tab mitme teema re\u017eiimis ja tagab j\u00f5udluse 1,6 miljoni inode'i kontrollimisel sekundis.<\/p>\n

V esitustest<\/a><\/noindex> NVFS viis l\u00e4bi Linuxi tuumatekstide kopeerimise operatsiooni NVM-muistikus umbes 10% kiiremini kui NOVA, 30% kiiremini kui ext4 ja 37% kiiremini kui XFS. Andmete otsimise testis osutus FS NVFS NOVA-st 3% kiiremaks ja ext4 ning XFS-st 15% kiiremaks (kuid aktiivse ketta vahem\u00e4lu korral oli NOVA 15% aeglasem).
\nMiljoni kataloogitehingu testis t\u00f5ukas NVFS NOVA-d 40%, ext4 22% ja XFS 46% v\u00f5rra taga. Andmebaasi tegevuse simuleerimisel edestas failis\u00fcsteem NVFS NOVA-d 20%, ext4-d 18 korda ja XFS-i 5 korda. fs_mark testis olid NVFS ja NOVA tulemused umbkaudu samal tasemel, samas kui ext4 ja XFS j\u00e4\u00e4vad umbes 3 korda maha.<\/p>\n

Traditsiooniliste failis\u00fcsteemide mahaj\u00e4\u00e4mus NVM-m\u00e4lus on tingitud sellest, et need ei ole baasitud baitide adresseerimisele, mida rakendatakse energia s\u00f5ltumatutes m\u00e4ludes, mis n\u00e4evad v\u00e4lja nagu tavaline RAM. Tavaliste andmekandjate lugemine tagab operatsiooni aatomilisuse sektori lugemise\/kirjutamise tasandil, samas kui NVM-m\u00e4lu pakub juurdep\u00e4\u00e4su individuaalsete masinakeelsete s\u00f5nade tasemel. Lisaks p\u00fc\u00fcavad traditsioonilised failis\u00fcsteemid v\u00e4hendada m\u00e4lukandjale p\u00f6\u00f6rdumist, mis on eelnevalt peetud aeglasemaks kui operatiivm\u00e4lu, samuti \u00fcritavad nad r\u00fchmitada operatsioone j\u00e4rjestikuse lugemise tagamiseks, kui kasutatakse k\u00f5vakettaid, hallata p\u00e4ringute j\u00e4rjekordi, v\u00f5idelda fragmenteerimisega ja jagada erinevate operatsioonide t\u00e4itmise prioriteete. NVM-m\u00e4lu puhul on sellised keerukused \u00fcleliigsed, kuna andmete juurdep\u00e4\u00e4su kiirus on v\u00f5rreldav RAM-iga ja juurdep\u00e4\u00e4su j\u00e4rjestus pole oluline.<\/p>\n

<\/a><\/noindex><\/p>\n

Allikas: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041c\u0438\u043a\u0443\u043b\u0430\u0448 \u041f\u0430\u0442\u043e\u0447\u043a\u0430 (Mikuláš Patočka), \u043e\u0434\u0438\u043d \u0438\u0437 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 LVM \u0438 \u0430\u0432\u0442\u043e\u0440 \u0440\u044f\u0434\u0430 \u0438\u0437\u043e\u0431\u0440\u0435\u0442\u0435\u043d\u0438\u0439, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u0440\u0430\u0431\u043e\u0442\u044b \u0441\u0438\u0441\u0442\u0435\u043c \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f, \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0439 \u0432 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Red Hat, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b \u0432 \u0441\u043f\u0438\u0441\u043a\u0435 \u0440\u0430\u0441\u0441\u044b\u043b\u043a\u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u044f\u0434\u0440\u0430 Linux \u043d\u043e\u0432\u0443\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u0443\u044e \u0441\u0438\u0441\u0442\u0435\u043c\u0443 NVFS, \u043d\u0430\u0446\u0435\u043b\u0435\u043d\u043d\u0443\u044e \u043d\u0430 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u043e\u0439 \u0438 \u0431\u044b\u0441\u0442\u0440\u043e\u0439 \u0424\u0421 \u0434\u043b\u044f \u0447\u0438\u043f\u043e\u0432 \u044d\u043d\u0435\u0440\u0433\u043e\u043d\u0435\u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 (NVM, non-volatile memory, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440 NVDIMM), \u0441\u043e\u0447\u0435\u0442\u0430\u044e\u0449\u0438\u0445 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u041e\u0417\u0423 \u0441 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c\u044e […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-94658","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Red Hat arendab uut NVFS failis\u00fcsteemi, mis on t\u00f5hus NVM-m\u00e4lu jaoks | ProHoster","description":"Mikul\u00e1\u0161 Pato\u010dka, \u00fcks LVM arendajatest ja mitmete salvestuss\u00fcsteemide t\u00f6\u00f6 optimeerimisega seotud leiutiste autor, kes t\u00f6\u00f6tab ettev\u00f5ttes Red Hat, tutvustas Linuxi tuumaarendajate e-posti loendis uut NVFS failis\u00fcsteemi, mis on suunatud kompaktsete ja 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\u0440\u0430\u0441\u0441\u044b\u043b\u043a\u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u044f\u0434\u0440\u0430 Linux \u043d\u043e\u0432\u0443\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u0443\u044e \u0441\u0438\u0441\u0442\u0435\u043c\u0443 NVFS, \u043d\u0430\u0446\u0435\u043b\u0435\u043d\u043d\u0443\u044e \u043d\u0430 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u043e\u0439 \u0438 \u0431\u044b\u0441\u0442\u0440\u043e\u0439 \u0424\u0421 \u0434\u043b\u044f \u0447\u0438\u043f\u043e\u0432 \u044d\u043d\u0435\u0440\u0433\u043e\u043d\u0435\u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 (NVM, non-volatile memory, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440 NVDIMM), \u0441\u043e\u0447\u0435\u0442\u0430\u044e\u0449\u0438\u0445 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u041e\u0417\u0423 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