{"id":36005,"date":"2019-10-31T22:09:06","date_gmt":"2019-10-31T19:09:06","guid":{"rendered":"https:\/\/prohoster.info\/blog\/otkazoustojchivost-v-shd-qsan\/"},"modified":"2019-10-31T22:09:06","modified_gmt":"2019-10-31T19:09:06","slug":"otkazoustojchivost-v-shd-qsan","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/otkazoustojchivost-v-shd-qsan","title":{"rendered":"Q\u00ebndrueshm\u00ebria n\u00eb sistemin e ruajtjes Qsan","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Sot globalisht n\u00eb infrastruktur\u00ebn IT, me p\u00ebrdorimin e p\u00ebrhapur t\u00eb virtualizimit, sistemet e ruajtjes s\u00eb t\u00eb dh\u00ebnave jan\u00eb b\u00ebrthama q\u00eb ruan t\u00eb gjitha makinat virtuale. D\u00ebshtimi i k\u00ebtij elementi mund t\u00eb ndal\u00eb plot\u00ebsisht funksionimin e qendr\u00ebs s\u00eb t\u00eb dh\u00ebnave. Edhe pse nj\u00eb pjes\u00eb e konsiderueshme e pajisjeve serverike ka mbrojtje nga d\u00ebshtimi n\u00eb nj\u00eb form\u00eb ose n\u00eb nj\u00eb tjet\u00ebr \"automatikisht\", p\u00ebr shkak t\u00eb rolit t\u00eb ve\u00e7ant\u00eb q\u00eb luan sistemi i ruajtjes n\u00eb qendr\u00ebn e t\u00eb dh\u00ebnave, k\u00ebrkesat p\u00ebr \"q\u00ebndrueshm\u00ebri\" jan\u00eb shum\u00eb m\u00eb t\u00eb larta.<\/p>\n

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\"Q\u00ebndrueshm\u00ebria
\n<\/a><\/noindex><\/p>\n

Metoda m\u00eb efektive p\u00ebr t\u00eb siguruar q\u00ebndrueshm\u00ebrin\u00eb n\u00eb IT \u00ebsht\u00eb p\u00ebrdorimi i disa ekzemplar\u00ebve t\u00eb pajisjeve dhe softuer\u00ebve (n\u00eb rastin m\u00eb t\u00eb thjesht\u00eb - duplikimi). Sigurisht, sistemi i ruajtjes mund t\u00eb duplikoj\u00eb plot\u00ebsisht. Dhe p\u00ebr rikuperim pasfatkeq\u00ebsie, ky \u00ebsht\u00eb pik\u00ebrisht qasja q\u00eb p\u00ebrdoret. Por jo t\u00eb gjitha kompanit\u00eb mund ta lejojn\u00eb nj\u00eb zgjidhje t\u00eb till\u00eb. K\u00ebtu nuk flasim vet\u00ebm p\u00ebr dyfishimin e kostos s\u00eb pajisjeve, por edhe p\u00ebr shpenzime t\u00eb tjera q\u00eb lidhen me organizimin e nj\u00eb zgjidhjeje t\u00eb till\u00eb dhe mb\u00ebshtetje t\u00eb saj m\u00eb pas. <\/p>\n

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Megjithat\u00eb, mund\u00ebsia e duplikimit t\u00eb pajisjeve nuk e z\u00ebvend\u00ebson nevoj\u00ebn p\u00ebr t\u00eb siguruar q\u00ebndrueshm\u00ebri n\u00eb nivelin e komponenteve. N\u00eb ve\u00e7anti, n\u00eb sistemin e ruajtjes aplikohet rezervimi p\u00ebr blloqet e energjis\u00eb, nj\u00ebsit\u00eb e ftohjes, disqet, dhe, natyrisht, kontrollet. T\u00eb gjitha k\u00ebto tashm\u00eb jan\u00eb b\u00ebr\u00eb di\u00e7ka e zakonshme. \u00cbsht\u00eb e v\u00ebshtir\u00eb t\u00eb gjesh nj\u00eb sistem ruajtjeje pa p\u00ebrdorimin e nj\u00eb dizajni t\u00eb till\u00eb. Qsan <\/a><\/noindex>k\u00ebtu - nuk \u00ebsht\u00eb p\u00ebrjashtim. Por n\u00eb k\u00ebt\u00eb artikull ne duam t\u00eb flasim p\u00ebr ato aspekte q\u00eb nuk dalin menj\u00ebher\u00eb n\u00eb pah dhe q\u00eb, p\u00ebr m\u00eb tep\u00ebr, jan\u00eb p\u00ebrqendruar kryesisht n\u00eb rritjen e q\u00ebndrueshm\u00ebris\u00eb s\u00eb sistemit n\u00eb t\u00ebr\u00ebsi.<\/p>\n

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Nj\u00ebsit\u00eb e ftohjes<\/h3>\n

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Shum\u00eb shpesh n\u00eb Sistemi i Ruajtjes <\/a><\/noindex>pjes\u00ebt me korpuse 2U-3U p\u00ebrdoren nj\u00ebsit\u00eb e kombinuara, duke bashkuar blloqet e energjis\u00eb dhe ventilator\u00ebt. Nga nj\u00ebra an\u00eb, kjo \u00ebsht\u00eb e p\u00ebrshtatshme, pasi duhet t\u00eb sh\u00ebrbehet vet\u00ebm nj\u00eb moduli. Nga ana tjet\u00ebr, n\u00ebse sistemi i ftohjes d\u00ebshtoj\u00eb, mund t\u00eb ndodh\u00eb q\u00eb blloku i energjis\u00eb t\u00eb p\u00ebrjashtohet p\u00ebr t\u00eb parandaluar mbizot\u00ebrimin e nxeht\u00ebsis\u00eb. Dhe duket se do t\u00eb ket\u00eb nj\u00eb situat\u00eb q\u00eb nuk \u00ebsht\u00eb shum\u00eb kritike, por nuk \u00ebsht\u00eb e men\u00e7ur t\u00eb shtojm\u00eb dob\u00ebsi n\u00eb sistemin e ruajtjes.<\/p>\n

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Ftohja n\u00eb sistemin e ruajtjes Qsan \u00ebsht\u00eb organizuar si nj\u00ebsit\u00eb e ve\u00e7anta me \"ndryshim n\u00eb nxeht\u00ebsi\", t\u00eb pavarura nga blloqet e energjis\u00eb. N\u00eb fakt, blloqet e energjis\u00eb p\u00ebrmbajn\u00eb ventilator\u00ebt e tyre, t\u00eb destinuar p\u00ebr ftohjen e vet\u00eb blloqeve. Nj\u00ebsia e ftohjes ka dy ventilator\u00eb t\u00eb pavarur, t\u00eb cil\u00ebt mb\u00ebshtesin nj\u00ebri-tjetrin. Ka dy nj\u00ebsit\u00eb t\u00eb tilla n\u00eb sistemin e ruajtjes: nj\u00ebra n\u00eb t\u00eb djatht\u00eb dhe tjetra n\u00eb t\u00eb majt\u00eb - p\u00ebr nj\u00eb ftohje efektive t\u00eb t\u00eb gjitha komponenteve. N\u00ebse ndodh d\u00ebshtimi i nj\u00ebrit nga ventilator\u00ebt, t\u00eb gjith\u00eb ventilator\u00ebt e tjer\u00eb automatikisht rrisin xhirimet e tyre p\u00ebr t\u00eb kompensuar munges\u00ebn e fluksit t\u00eb ajrit. Prandaj, nj\u00eb defekt n\u00eb ventilator nuk paraqet rrezik p\u00ebr mbizot\u00ebrimin e gjith\u00eb paisjes.<\/p>\n

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Topologjia e lidhjes s\u00eb rafteve t\u00eb zgjerimit<\/h3>\n

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Skema klasike e lidhjes rafteve t\u00eb zgjerimit<\/a><\/noindex> me sistemin e ruajtjes n\u00ebnkupton nj\u00eb topologji t\u00eb quajtur kaskad\u00eb. N\u00eb k\u00ebt\u00eb rast, kontrollet p\u00ebrkat\u00ebse t\u00eb rafteve dhe sistemit t\u00eb ruajtjes lidhen me nj\u00eb kabllo SAS t\u00eb vetme. N\u00eb total, rezulton 2 kabllo p\u00ebr nj\u00eb sistem me dy kontrolle. N\u00ebse k\u00ebrkohet t\u00eb lidhni nj\u00eb t\u00eb dyt\u00eb, ajo lidhet n\u00eb t\u00eb nj\u00ebjt\u00ebn m\u00ebnyr\u00eb me rafte par\u00eb. Dhe k\u00ebshtu me radh\u00eb. Avantazhi i k\u00ebsaj topologjie \u00ebsht\u00eb thjesht\u00ebsia e realizimit n\u00eb pajisje. Nd\u00ebrsa disavantazhi do t\u00eb jet\u00eb nj\u00eb dob\u00ebsi p\u00ebrball\u00eb ndaljes s\u00eb beft\u00eb t\u00eb zinxhirit SAS p\u00ebr shkak t\u00eb d\u00ebshtimit t\u00eb palidhur t\u00eb kontrolleve t\u00eb sistemit t\u00eb ruajtjes dhe rafteve ose p\u00ebr shkak t\u00eb nd\u00ebrprerjes s\u00eb energjis\u00eb n\u00eb nj\u00eb nga rafte zgjerimi n\u00eb mes t\u00eb zinxhirit. Rezultati do t\u00eb jet\u00eb humbja e aksesit n\u00eb disa disqe dhe e mundshme prishje e grupit RAID, n\u00ebse ai \u00ebsht\u00eb \"i tretur\" n\u00eb disa korpuse.<\/p>\n

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P\u00ebr t\u00eb mbrojtur nga d\u00ebshtimet e palidhura t\u00eb kontrolleve, Qsan ka mbrojtje n\u00eb form\u00ebn e lidhjeve logjike t\u00eb brendshme t\u00eb kontrolleve p\u00ebrmes backend-it t\u00eb sistemit t\u00eb ruajtjes. K\u00ebshtu, kontrolli i sistemit t\u00eb ruajtjes nuk sheh vet\u00ebm kontrollet JBOD, t\u00eb lidhura direkt me t\u00eb, por gjithashtu kontrollin \"fqinji\" p\u00ebrmes nj\u00eb lidhjeje speciale n\u00eb backend. Si rezultat, n\u00ebse ndodh nj\u00eb situat\u00eb e till\u00eb dhe askush fizikisht nuk do t\u00eb t\u00ebrheq\u00eb kabllot SAS midis sistemit t\u00eb ruajtjes dhe rafteve, at\u00ebher\u00eb aksesin n\u00eb t\u00eb gjitha disqet do ta ruhet.<\/p>\n

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\"Q\u00ebndrueshm\u00ebria<\/p>\n

P\u00ebr t\u00eb mbrojtur nga nd\u00ebrprerja e zinxhirit SAS, p\u00ebr shembull, p\u00ebr shkak t\u00eb nd\u00ebrprerjes s\u00eb energjis\u00eb n\u00eb rrethin e zgjerimit, zakonisht p\u00ebrdoret nj\u00eb topologji tjet\u00ebr lidhjeje - kaskada e kund\u00ebrt. N\u00eb k\u00ebt\u00eb rast, sistemi i ruajtjes lidh\u00ebt menj\u00ebher\u00eb me rafte e para dhe t\u00eb fundit n\u00eb zinxhir, duke fituar akses n\u00eb disqet si\u00e7 \u00ebsht\u00eb b\u00ebr\u00eb nga t\u00eb dy an\u00ebt.<\/p>\n

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\"Q\u00ebndrueshm\u00ebria<\/p>\n

N\u00ebse d\u00ebshironi mbrojtje m\u00eb t\u00eb fort\u00eb, mund t\u00eb nd\u00ebrtoni konfiguracione m\u00eb t\u00eb m\u00ebdha, duke p\u00ebrdorur, p\u00ebr shembull, topologjin\u00eb e pem\u00ebs. Ose mund ta komplikonit m\u00eb tej duke kombinuar topologjit\u00eb e p\u00ebrmendura. Kjo \u00ebsht\u00eb e mundur fal\u00eb numrit t\u00eb madh t\u00eb konektor\u00ebve SAS n\u00eb pajisjet (2 p\u00ebr \u00e7do kontrollues t\u00eb sistemit t\u00eb ruajtjes dhe 5 p\u00ebr \u00e7do kontrollues JBOD) me p\u00ebrcaktimin automatik t\u00eb m\u00ebnyrave t\u00eb pun\u00ebs hyrje\/dalje. E r\u00ebnd\u00ebsishme \u00ebsht\u00eb q\u00eb vet\u00eb administratori t\u00eb mos ngat\u00ebrrohet. Nd\u00ebrsa sistemi i ruajtjes do t\u00eb jet\u00eb n\u00eb gjendje t\u00eb konfiguroj\u00eb sakt\u00eb konfigurimin.<\/p>\n

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Rind\u00ebrtim i shpejt\u00eb<\/h3>\n

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Prania n\u00eb sistem e disqeve rezerv\u00eb me nd\u00ebrrim 'n\u00eb gjall\u00eb' (hot spare) p\u00ebrmir\u00ebson ndjesh\u00ebm besueshm\u00ebrin\u00eb e ruajtjes s\u00eb informacionit. Megjithat\u00eb, fakti i thjesht\u00eb se k\u00ebto disqe jan\u00eb t\u00eb ndara nuk do t\u00eb thot\u00eb automatikisht mbrojtje absolute. Problemi \u00ebsht\u00eb se procesi i rikuperimit (rind\u00ebrtimit) \u00ebsht\u00eb mjaft pun\u00ebtor dhe shpesh zgjat gjat\u00eb. Kjo v\u00ebshtir\u00ebsi buron nga qasja e vazhdueshme n\u00eb t\u00eb dh\u00ebnat kryesore. Pra, sistemi, p\u00ebrve\u00e7 pun\u00ebs aktuale, duhet gjithashtu t\u00eb kopjoj\u00eb t\u00eb dh\u00ebnat n\u00eb diskun e ri. Dhe koh\u00ebzgjatja e rind\u00ebrtimit varet direkt nga kapaciteti i ruajt\u00ebsit dhe karakteristikat e tij t\u00eb shpejt\u00ebsis\u00eb. Duke qen\u00eb se sistemi nuk di asgj\u00eb p\u00ebr hap\u00ebsir\u00ebn e v\u00ebrtet\u00eb t\u00eb z\u00ebn\u00eb n\u00eb disqe, ai gjat\u00eb procesit t\u00eb rind\u00ebrtimit thjesht kopjon gjith\u00e7ka: bllok p\u00ebr bllok. <\/p>\n

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Si rezultat, rikuperimi i nj\u00eb disku modern me kapacitet t\u00eb madh mbi 10 TB n\u00ebn ngarkes\u00eb t\u00eb r\u00ebnd\u00eb n\u00eb sistemin e ruajtjes mund t\u00eb zgjas\u00eb leht\u00ebsisht nj\u00eb jav\u00eb e m\u00eb shum\u00eb. Gjithashtu, duhet marr\u00eb parasysh se gjat\u00eb rind\u00ebrtimit rritet ndjesh\u00ebm probabiliteti i d\u00ebshtimit t\u00eb m\u00ebnyrave t\u00eb tjera p\u00ebr shkak t\u00eb ngarkes\u00ebs s\u00eb rritur mbi to. Kjo tashm\u00eb mund t\u00eb paraqes\u00eb nj\u00eb rrezik serioz n\u00eb rastin e p\u00ebrdorimit, p\u00ebr shembull, RAID5.<\/p>\n

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Si zgjidhje p\u00ebr k\u00ebt\u00eb problem, shum\u00eb zhvillues t\u00eb sistemeve t\u00eb ruajtjes jan\u00eb angazhuar n\u00eb p\u00ebrshpejtimin e procesit t\u00eb rikuperimit. P\u00ebr k\u00ebt\u00eb mund t\u00eb aplikohen qasje t\u00eb ndryshme, por thelbi \u00ebsht\u00eb i nj\u00ebjt\u00eb \u2013 kopjimi gjat\u00eb rind\u00ebrtimit vet\u00ebm i blloqeve q\u00eb jan\u00eb realisht t\u00eb z\u00ebna. Qsan nuk ka mbetur jasht\u00eb k\u00ebtij problemi. Te sistemi i ruajtjes s\u00eb k\u00ebtij nd\u00ebrtuesi, me opsionin e aktivizuar Rind\u00ebrtim i Shpejt\u00eb<\/a><\/noindex> sistemi ndjek blloqet e p\u00ebrdorura p\u00ebr shkrim, duke pasur k\u00ebshtu mund\u00ebsin\u00eb, n\u00eb rast d\u00ebshtimi t\u00eb disku, t\u00eb kopjoj\u00eb vet\u00ebm ato n\u00eb nj\u00eb ruajt\u00ebs t\u00eb ri.<\/p>\n

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\"Q\u00ebndrueshm\u00ebria<\/p>\n

Opsioni Rind\u00ebrtim i Shpejt\u00eb nuk aktivizohet automatikisht gjat\u00eb krijimit t\u00eb volumen\u00ebve t\u00eb rinj, pasi p\u00ebrdorimi i tij ka ndikim n\u00eb performanc\u00eb, ve\u00e7an\u00ebrisht gjat\u00eb operacioneve t\u00eb shkruara rast\u00ebsore, sepse:<\/p>\n

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    \n
  1. Nevojitet t\u00eb ndiqet shkrimi n\u00eb blloqe;<\/li>\n
  2. Gjat\u00eb rind\u00ebrtimit nuk ndodhin llogaritje t\u00eb kontrollit p\u00ebr hap\u00ebsir\u00ebn e pa z\u00ebn\u00eb, prandaj, p\u00ebr nj\u00eb shkrim t\u00eb ri n\u00eb k\u00ebt\u00eb zon\u00eb \u00ebsht\u00eb e nevojshme fillimisht 't\u00eb inicializohet' ajo.<\/li>\n<\/ol>\n

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    Prandaj, nuk rekomandohet p\u00ebrdorimi i Rind\u00ebrtimit t\u00eb Shpejt\u00eb p\u00ebr volumet, p.sh., me baza t\u00eb dh\u00ebnash t\u00eb ngarkuara shum\u00eb ose n\u00eb sistemet e mbik\u00ebqyrjes video, ku volumi do t\u00eb jet\u00eb gjithsesi i mbushur n\u00eb 100%. Por, p\u00ebr server\u00ebt e dokumenteve ose t\u00eb post\u00ebs, ky opsion v\u00ebrtet do t\u00eb jet\u00eb shum\u00eb i dobish\u00ebm.<\/p>\n

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    N\u00eb vend t\u00eb p\u00ebrfundimit<\/h2>\n

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    \u00c7do prodhues i sistemeve t\u00eb ruajtjes pretendon se pajisjet e tij jan\u00eb t\u00eb besueshme. N\u00ebse nuk ka llogaritje fatale gjat\u00eb zhvillimit t\u00eb pajisjeve dhe nj\u00eb d\u00ebshir\u00eb e pabesueshme p\u00ebr kursim gjat\u00eb prodhimit dhe testimit t\u00eb tyre, at\u00ebher\u00eb n\u00eb p\u00ebrgjith\u00ebsi mund t\u00eb pajtohemi me nd\u00ebrtuesin. Megjithat\u00eb, duhet kuptuar: <\/p>\n

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