{"id":40729,"date":"2020-02-03T14:42:16","date_gmt":"2020-02-03T11:42:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/kratkoe-sravnenie-arhitektury-sds-ili-poisk-podhodyashhej-platformy-hraneniya-glustervscephvsvirtuozzostorage"},"modified":"2020-02-03T14:42:16","modified_gmt":"2020-02-03T11:42:16","slug":"kratkoe-sravnenie-arhitektury-sds-ili-poisk-podhodyashhej-platformy-hraneniya-glustervscephvsvirtuozzostorage","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/kratkoe-sravnenie-arhitektury-sds-ili-poisk-podhodyashhej-platformy-hraneniya-glustervscephvsvirtuozzostorage","title":{"rendered":"Krahasim i shkurt\u00ebr i arkitektur\u00ebs SDS ose gjetja e platform\u00ebs s\u00eb p\u00ebrshtatshme t\u00eb ruajtjes (GlusterVsCephVsVirtuozzoStorage)","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ky k\u00ebtij artikulli shkruhet p\u00ebr t\u00eb ndihmuar n\u00eb zgjedhjen e zgjidhjes s\u00eb p\u00ebrshtatshme dhe p\u00ebr t\u00eb kuptuar dallimet midis SDS si Gluster, Ceph dhe Vstorage (Virtuozzo).<\/p>\n<p>N\u00eb tekst p\u00ebrdoren lidhje n\u00eb artikuj me nj\u00eb shpjegim m\u00eb t\u00eb detajuar t\u00eb problemeve t\u00eb caktuara, prandaj p\u00ebrshkrimet do t\u00eb jen\u00eb sa m\u00eb t\u00eb shkurtra, duke p\u00ebrdorur pika ky\u00e7e pa informacione t\u00eb panevojshme dhe hyr\u00ebse, t\u00eb cilat mund t\u2019i k\u00ebrkoni vet\u00eb n\u00eb internet. <\/p>\n<p>N\u00eb fakt, temat e prekur k\u00ebrkojn\u00eb nj\u00eb ton specifik t\u00eb tekstit, por n\u00eb bot\u00ebn moderne gjithnj\u00eb e m\u00eb shum\u00eb njer\u00ebz nuk p\u00eblqejn\u00eb t\u00eb lexojn\u00eb shum\u00eb))), prandaj mund t\u00eb lexoni shpejt dhe t\u00eb b\u00ebni zgjedhjen tuaj, dhe n\u00ebse ka di\u00e7ka q\u00eb nuk kuptoni, mund t\u00eb kaloni n\u00eb lidhjet ose t\u00eb hidhni nj\u00eb sy n\u00eb fjal\u00ebt e panjohura))), dhe ky artikull funksionon si nj\u00eb mb\u00ebshtjell\u00ebs transparent p\u00ebr k\u00ebto tema t\u00eb thella, duke treguar p\u00ebrmbajtjen \u2013 pikat kryesore t\u00eb \u00e7do zgjidhjeje.<\/p>\n<h3>Gluster<\/h3>\n<p>\nT\u00eb fillojm\u00eb me Gluster, i cili p\u00ebrdoret gjer\u00ebsisht nga prodhuesit e platformave hiper-konverguese me SDS t\u00eb bazuar n\u00eb open source p\u00ebr mjedise virtuale dhe mund t\u00eb gjendet n\u00eb faqen e RedHat n\u00eb seksionin storage, ku ofrohet zgjedhja midis dy opsioneve SDS: Gluster ose Ceph.<\/p>\n<p>Gluster p\u00ebrb\u00ebhet nga nj\u00eb grup sh\u00ebrbimesh \u2013 sh\u00ebrbime q\u00eb kryejn\u00eb t\u00eb gjitha pun\u00ebt e shp\u00ebrndarjes s\u00eb skedar\u00ebve dhe t\u00eb tjera. Brick \u2013 sh\u00ebrbimi q\u00eb sh\u00ebrben nj\u00eb disk, Volume \u2013 v\u00ebllimi (puli) q\u00eb bashkon k\u00ebto brick. M\u00eb tej sh\u00ebrbimi i shp\u00ebrndarjes s\u00eb skedar\u00ebve n\u00eb grupe p\u00ebrmes funksionit DHT (distributed hash table). Sh\u00ebrbimi i Sharding nuk do t\u00eb p\u00ebrfshihet n\u00eb p\u00ebrshkrim, pasi n\u00eb lidhjet e m\u00ebposhtme do t\u00eb ket\u00eb p\u00ebrshkrime t\u00eb problemeve t\u00eb lidhura me t\u00eb.<\/p>\n<p><img decoding=\"async\" alt=\"Krahasim i shkurt\u00ebr i arkitektur\u00ebs SDS ose gjetja e platform\u00ebs s\u00eb p\u00ebrshtatshme t\u00eb ruajtjes (GlusterVsCephVsVirtuozzoStorage)\" src=\"\/wp-content\/uploads\/2020\/02\/0c54588b5b09c9069ffbd0c5161c5e34.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKur shkruhet, skedari i plot\u00eb vendoset n\u00eb brick dhe kopja e tij shkruhet paralelisht n\u00eb brick n\u00eb serverin e dyt\u00eb. M\u00eb pas, skedari i dyt\u00eb do t\u00eb regjistrohet n\u00eb grupin e dyt\u00eb t\u00eb dy bri\u0441k (ose m\u00eb shum\u00eb) n\u00eb server\u00eb t\u00eb ndrysh\u00ebm.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex> <br \/>\nN\u00ebse skedar\u00ebt jan\u00eb af\u00ebrsisht t\u00eb nj\u00eb madh\u00ebsie dhe v\u00ebllimi do t\u00eb p\u00ebrb\u00ebhet vet\u00ebm nga nj\u00eb grup, gjith\u00e7ka \u00ebsht\u00eb n\u00eb rregull, por n\u00eb kushtet e tjera do t\u00eb lindin problemet e m\u00ebposhtme nga p\u00ebrshkrimet: <\/p>\n<ul>\n<li>hap\u00ebsira n\u00eb grupe p\u00ebrdoret n\u00eb m\u00ebnyr\u00eb t\u00eb pabarabart\u00eb, kjo varet nga madh\u00ebsit\u00eb e skedar\u00ebve dhe n\u00ebse grupi nuk ka mjaft hap\u00ebsir\u00eb p\u00ebr t\u00eb regjistruar skedarin \u2013 ju do t\u00eb merrni nj\u00eb gabim, skedari nuk do t\u00eb regjistrohet dhe nuk do t\u00eb shp\u00ebrndahet n\u00eb nj\u00eb grup tjet\u00ebr;<\/li>\n<li>kur shkruhet nj\u00eb skedar, IO ndodhet vet\u00ebm n\u00eb nj\u00eb grup, grupet e tjera nuk punojn\u00eb;<\/li>\n<li>nuk \u00ebsht\u00eb e mundur t\u00eb arrihet IO i t\u00ebr\u00eb v\u00ebllimit kur shkruhet nj\u00eb skedar;<\/li>\n<li>dhe koncepti i p\u00ebrgjithsh\u00ebm duket se \u00ebsht\u00eb m\u00eb pak efektiv p\u00ebr shkak t\u00eb munges\u00ebs s\u00eb shp\u00ebrndarjes s\u00eb t\u00eb dh\u00ebnave n\u00eb blloqe, ku \u00ebsht\u00eb m\u00eb e leht\u00eb t\u00eb realizohet balancimi dhe t\u00eb zgjidhet problemi i shp\u00ebrndarjes s\u00eb barabart\u00eb, sesa si\u00e7 \u00ebsht\u00eb tani kur fakti vendoset si nj\u00eb bllok i t\u00ebr\u00eb.<\/li>\n<\/ul>\n<p>\nNga p\u00ebrshkrimi zyrtar <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.gluster.org\/en\/latest\/Quick-Start-Guide\/Architecture\/\">arkitektur\u00ebs<\/a><\/noindex> duhet t\u00eb kuptohet se gluster funksionon si nj\u00eb depo e skedar\u00ebve mbi RAID-in klasik. Ka pasur p\u00ebrpjekje p\u00ebr t\u00eb zhvilluar ndarjen (Sharding) e skedar\u00ebve n\u00eb blloqe, por k\u00ebto jan\u00eb plot\u00ebsime q\u00eb imponojn\u00eb humbje n\u00eb performanc\u00eb p\u00ebr qasjen arkitektonike ekzistuese, plus p\u00ebrdorimin e komponent\u00ebve t\u00eb till\u00eb t\u00eb lira me kufizime n\u00eb performanc\u00eb si Fuse. Nuk ka sh\u00ebrbime metadatan, q\u00eb kufizojn\u00eb mund\u00ebsit\u00eb e performanc\u00ebs dhe q\u00ebndrueshm\u00ebris\u00eb s\u00eb depozit\u00ebs n\u00eb shp\u00ebrndarjen e skedar\u00ebve n\u00eb blloqe. T\u00eb dh\u00ebna m\u00eb t\u00eb mira t\u00eb performanc\u00ebs mund t\u00eb v\u00ebrehen n\u00eb konfigurimin \u201cDistributed Replicated\u201d dhe numri i nod\u00ebve duhet t\u00eb jet\u00eb t\u00eb pakt\u00ebn 6 p\u00ebr organizimin e nj\u00eb replike t\u00eb sigurt me 3 me shp\u00ebrndarjen optimale t\u00eb ngarkes\u00ebs.<\/p>\n<p>K\u00ebto konkluzione gjithashtu lidhen me p\u00ebrshkrimin e p\u00ebrvoj\u00ebs s\u00eb p\u00ebrdorimit <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/croccloudteam\/blog\/353666\/\">Gluster<\/a><\/noindex> dhe n\u00eb krahasim me <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/croccloudteam\/blog\/430474\/\">Ceph<\/a><\/noindex>, si dhe ka nj\u00eb p\u00ebrshkrim t\u00eb p\u00ebrvoj\u00ebs p\u00ebr t\u00eb arritur k\u00ebt\u00eb konfigurim m\u00eb t\u00eb q\u00ebndruesh\u00ebm dhe m\u00eb t\u00eb besuesh\u00ebm <noindex><a rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/forum\/general\/13316001\">\u201cReplicated Distributed\u201d.<\/a><\/noindex><br \/>\n<img decoding=\"async\" alt=\"Krahasim i shkurt\u00ebr i arkitektur\u00ebs SDS ose gjetja e platform\u00ebs s\u00eb p\u00ebrshtatshme t\u00eb ruajtjes (GlusterVsCephVsVirtuozzoStorage)\" src=\"\/wp-content\/uploads\/2020\/02\/6868ddf69e18bec0b50ae5aeba74440d.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nN\u00eb figur\u00eb shikohet shp\u00ebrndarja e ngarkes\u00ebs gjat\u00eb shkrimit t\u00eb dy skedar\u00ebve, ku kopjet e skedarit t\u00eb par\u00eb ndahen n\u00eb tre server\u00ebt e par\u00eb, t\u00eb cil\u00ebt jan\u00eb t\u00eb bashkuar n\u00eb grupin volume 0 dhe tre kopjet e skedarit t\u00eb dyt\u00eb vendosen n\u00eb grupin e dyt\u00eb volume1 nga tre server\u00eb. \u00c7do server ka nj\u00eb disk.<\/p>\n<p>Konkluzioni i p\u00ebrgjithsh\u00ebm \u00ebsht\u00eb se Gluster mund t\u00eb p\u00ebrdoret, por me kuptimin se do t\u00eb ket\u00eb kufizime n\u00eb performanc\u00eb dhe q\u00ebndrueshm\u00ebri, q\u00eb krijojn\u00eb v\u00ebshtir\u00ebsi n\u00eb disa kushte t\u00eb zgjidhjes hiper-konverguese, ku burimet jan\u00eb gjithashtu t\u00eb nevojshme p\u00ebr ngarkesat llogarit\u00ebse t\u00eb mjeteve virtuale. <\/p>\n<p>Ka disa pasqyra gjithashtu t\u00eb performanc\u00ebs s\u00eb Gluster, t\u00eb cilat mund t\u00eb arrihen n\u00eb kushte t\u00eb caktuara duke u kufizuar n\u00eb <noindex><a rel=\"nofollow\" href=\"http:\/\/moo.nac.uci.edu\/~hjm\/Performance_in_a_Gluster_Systemv6F.pdf\"> q\u00ebndrueshm\u00ebri.<\/a><\/noindex><\/p>\n<h3>Ceph<\/h3>\n<p>\nTani le t\u00eb shqyrtojm\u00eb Ceph nga p\u00ebrshkrimet e arkitektur\u00ebs q\u00eb kam arritur <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/313644\/\">t\u00eb gjej.<\/a><\/noindex> Ka gjithashtu nj\u00eb krahasim midis <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/croccloudteam\/blog\/430474\/\">Glusterfs dhe Ceph<\/a><\/noindex>, ku mund t\u00eb kuptohet menj\u00ebher\u00eb se Ceph preferohet t\u00eb implementohet n\u00eb servera t\u00eb ve\u00e7ant\u00eb, pasi sh\u00ebrbimet e tij k\u00ebrkojn\u00eb t\u00eb gjitha burimet e harduerit n\u00ebn ngarkes\u00eb. <\/p>\n<p>Arkitektura <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.ceph.com\/docs\/mimic\/architecture\/\">Ceph<\/a><\/noindex> m\u00eb shpesh m\u00eb e komplikuar se Gluster dhe ka sh\u00ebrbime si sh\u00ebrbimet e metadatat, por e gjith\u00eb stina e komponent\u00ebve \u00ebsht\u00eb mjaft e komplikuar dhe jo shum\u00eb fleksib\u00ebl p\u00ebr ta p\u00ebrdorur n\u00eb nj\u00eb zgjidhje virtualizimi. T\u00eb dh\u00ebnat organizohen n\u00eb blloqe, q\u00eb duket se \u00ebsht\u00eb m\u00eb e efektshme, por ka humbje dhe latency n\u00eb hierarkin\u00eb e t\u00eb gjitha sh\u00ebrbimeve (komponent\u00ebve) n\u00ebn disa ngarkesa dhe kushte emergjente, si\u00e7 \u00ebsht\u00eb shembulli i m\u00ebposht\u00ebm. <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/oleg-bunin\/blog\/431536\/\">artikull.<\/a><\/noindex><\/p>\n<p>Nga p\u00ebrshkrimi i arkitektur\u00ebs, n\u00eb qend\u00ebr \u00ebsht\u00eb CRUSH, i cili p\u00ebrcakton vendin e ruajtjes s\u00eb t\u00eb dh\u00ebnave. M\u00eb pas vjen PG - kjo \u00ebsht\u00eb abstraksioni m\u00eb i komplikuar (grupi logic) p\u00ebr t'u kuptuar. PG jan\u00eb t\u00eb nevojshme p\u00ebr t\u00eb b\u00ebr\u00eb CRUSH m\u00eb efikas. Q\u00ebllimi kryesor i PG \u00ebsht\u00eb grupimi i objekteve p\u00ebr t\u00eb ulur konsumimin e burimeve, p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar performanc\u00ebn dhe shkall\u00ebzueshm\u00ebrin\u00eb. Adresimi i objekteve n\u00eb m\u00ebnyr\u00eb t\u00eb drejtp\u00ebrdrejt\u00eb, ve\u00e7mas, pa i bashkuar ato n\u00eb PG do t\u00eb ishte shum\u00eb i shtrenjt\u00eb. OSD - \u00ebsht\u00eb sh\u00ebrbimi p\u00ebr \u00e7do disk t\u00eb ve\u00e7ant\u00eb.<\/p>\n<p><img decoding=\"async\" alt=\"Krahasim i shkurt\u00ebr i arkitektur\u00ebs SDS ose gjetja e platform\u00ebs s\u00eb p\u00ebrshtatshme t\u00eb ruajtjes (GlusterVsCephVsVirtuozzoStorage)\" src=\"\/wp-content\/uploads\/2020\/02\/b7d59066a01db9bbb55bbd87c6e5053a.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Krahasim i shkurt\u00ebr i arkitektur\u00ebs SDS ose gjetja e platform\u00ebs s\u00eb p\u00ebrshtatshme t\u00eb ruajtjes (GlusterVsCephVsVirtuozzoStorage)\" src=\"\/wp-content\/uploads\/2020\/02\/a86622bc051ab820d42a8aa08a3fc759.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKlusteri mund t\u00eb ket\u00eb nj\u00eb ose shum\u00eb rezervar\u00eb t\u00eb dh\u00ebnash me q\u00ebllime t\u00eb ndryshme dhe me konfigurime t\u00eb ndryshme. Reservar\u00ebt ndahen n\u00eb grupe vendosjeje. N\u00eb grupet e vendosjes ruhen objekte, t\u00eb cilat k\u00ebrkohen nga klient\u00ebt. N\u00eb k\u00ebt\u00eb nivel logjik p\u00ebrfundon, dhe fillon ai fizik, sepse secil\u00ebs grup vendosjeje i \u00ebsht\u00eb caktuar nj\u00eb disk kryesor dhe disa disqe-replika (sesa shum\u00eb varet nga faktori i replikimit t\u00eb rezervarit). Me fjal\u00eb t\u00eb tjera, n\u00eb nivelin logjik, objekti ruhet n\u00eb nj\u00eb grup konkret vendosjeje, nd\u00ebrsa n\u00eb nivelin fizik - n\u00eb disqet q\u00eb jan\u00eb caktuar p\u00ebr t\u00eb. Megjithat\u00eb, disqet fizikisht mund t\u00eb jen\u00eb n\u00eb nodo t\u00eb ndryshme ose madje n\u00eb qendra t\u00eb ndryshme t\u00eb t\u00eb dh\u00ebnave.<\/p>\n<p>N\u00eb k\u00ebt\u00eb skem\u00eb, grupet e vendosjes duken si nj\u00eb nivel i nevojsh\u00ebm p\u00ebr fleksibilitetin e t\u00ebr\u00eb zgjidhjes, por nj\u00ebkoh\u00ebsisht edhe si nj\u00eb lidhje e tep\u00ebrt n\u00eb k\u00ebt\u00eb zinxhir, q\u00eb pa dashje ngjall mendime p\u00ebr humbjen e performanc\u00ebs. P\u00ebr shembull, gjat\u00eb regjistrimit t\u00eb t\u00eb dh\u00ebnave, sistemi duhet t'i ndaj\u00eb ato n\u00eb k\u00ebto grupe dhe m\u00eb pas n\u00eb nivelin fizik n\u00eb diskun kryesor dhe n\u00eb disk\u00ebt p\u00ebr replika. Pra, funksioni i hash-it punon gjat\u00eb k\u00ebrkimit dhe vendosjes s\u00eb objektit, por ka nj\u00eb efekt an\u00ebsor \u2013 k\u00ebto jan\u00eb shpenzime t\u00eb m\u00ebdha dhe kufizime n\u00eb rinovimin e hash-it (kur shtohet ose hiqet nj\u00eb disk). Nj\u00eb tjet\u00ebr problem me hash-in \u00ebsht\u00eb vendosja e fiksuar e t\u00eb dh\u00ebnave, t\u00eb cilat nuk mund t\u00eb ndryshohen. Pra, n\u00ebse ndonj\u00eb disk p\u00ebrjeton nj\u00eb ngarkes\u00eb t\u00eb rritur, sistemi nuk ka mund\u00ebsi t\u00eb mos shkruaj\u00eb n\u00eb t\u00eb (duke zgjedhur nj\u00eb disk tjet\u00ebr), funksioni i hash-it e detyron vendosjen e t\u00eb dh\u00ebnave sipas nj\u00eb rregulli, pa marr\u00eb parasysh se sa keq ndjehet disku, prandaj Ceph konsumon shum\u00eb memorie gjat\u00eb rinovimit t\u00eb PG-s\u00eb n\u00eb rastin e vet\u00eb-riparimit ose rritjes s\u00eb magazin\u00ebs. P\u00ebrfundimi \u00ebsht\u00eb se Ceph punon mir\u00eb (edhe pse ngadal\u00eb), por vet\u00ebm kur nuk ka zgjerim, situata emergjente ose azhurnim.<\/p>\n<p>Natyrisht, ka mund\u00ebsi p\u00ebr rritjen e performanc\u00ebs p\u00ebrmes keshtimi dhe keshtirjes, por p\u00ebr k\u00ebt\u00eb nevojitet hardware i mir\u00eb dhe gjithsesi do t\u00eb ket\u00eb humbje. Por n\u00eb p\u00ebrgjith\u00ebsi Ceph duket m\u00eb t\u00ebrheq\u00ebs se Gluster p\u00ebr produktivitet. Gjithashtu, gjat\u00eb p\u00ebrdorimit t\u00eb k\u00ebtyre produkteve duhet t\u00eb merret parasysh nj\u00eb faktor i r\u00ebnd\u00ebsish\u00ebm - niveli i lart\u00eb i kompetencave, p\u00ebrvoj\u00ebs dhe profesionalizmit me nj\u00eb theks t\u00eb madh n\u00eb linux, pasi \u00ebsht\u00eb shum\u00eb e r\u00ebnd\u00ebsishme t\u00eb gjitha t\u00eb vendosen, konfigurohen dhe mbahen si\u00e7 duhet, gj\u00eb q\u00eb krijon m\u00eb shum\u00eb p\u00ebrgjegj\u00ebsi dhe ngarkes\u00eb ndaj administratorit. <\/p>\n<h3>Vstorage<\/h3>\n<p>\nArkitektura duket edhe m\u00eb interesante te <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/virtuozzo\/blog\/334724\/\">Virtuozzo storage(Vstorage)<\/a><\/noindex>, e cila mund t\u00eb p\u00ebrdoret s\u00eb bashku me hipervizorin n\u00eb t\u00eb nj\u00ebjtat nyje, n\u00eb t\u00eb nj\u00ebjtin <noindex><a rel=\"nofollow\" href=\"http:\/\/samag.ru\/archive\/article\/3794\">hardware<\/a><\/noindex>, por \u00ebsht\u00eb shum\u00eb e r\u00ebnd\u00ebsishme ta konfigurosh gjith\u00e7ka si\u00e7 duhet p\u00ebr t\u00eb arritur nj\u00eb performanc\u00eb t\u00eb mir\u00eb. Pra, duke vendosur nj\u00eb produkt t\u00eb till\u00eb nga kutia n\u00eb nj\u00eb konfigurim t\u00eb rast\u00ebsish\u00ebm pa marr\u00eb parasysh rekomandimet n\u00eb p\u00ebrputhje me arkitektur\u00ebn do t\u00eb jet\u00eb shum\u00eb e leht\u00eb, por jo produktive.<\/p>\n<p>\u00c7far\u00eb mund t\u00eb bashk\u00ebjetoj\u00eb p\u00ebr ruajtje pran\u00eb sh\u00ebrbimeve t\u00eb hipervizorit kvm-qemu, dhe kjo jan\u00eb vet\u00ebm disa sh\u00ebrbime, ku \u00ebsht\u00eb gjetur nj\u00eb hierarki kompakt optimale komponentesh: sh\u00ebrbimi i klientit i montuar p\u00ebrmes FUSE (i modifikuar, jo open source), sh\u00ebrbimi i metadatan\u00eb MDS (Sh\u00ebrbimi i Metadatanave), sh\u00ebrbimi i bllokut t\u00eb t\u00eb dh\u00ebnave Chunk service, i cili n\u00eb nivelin fizik \u00ebsht\u00eb i barabart\u00eb me nj\u00eb disk dhe ajo \u00ebsht\u00eb e gjitha. Sigurisht, p\u00ebr shpejt\u00ebsi \u00ebsht\u00eb optimale t\u00eb p\u00ebrdoret nj\u00eb skem\u00eb e q\u00ebndrueshme me dy kopje, por n\u00ebse aktivizohet caching dhe regjistrat n\u00eb disqet SSD, at\u00ebher\u00eb kodimi i q\u00ebndruesh\u00ebm (erase coding ose raid6) mund t\u00eb p\u00ebrshpejtohet ndjesh\u00ebm n\u00eb nj\u00eb skem\u00eb hibride ose madje edhe m\u00eb mir\u00eb n\u00eb all flash. Me EC (erase coding) ka disa disavantazhe: kur modifikohet nj\u00eb bllok i t\u00eb dh\u00ebnave, \u00ebsht\u00eb e nevojshme t\u00eb llogaritet p\u00ebrs\u00ebri somat e paritetit. P\u00ebr t\u00eb shmangur humbjet n\u00eb k\u00ebt\u00eb operacion Ceph shkruan n\u00eb EC si t\u00eb vonuar dhe problemi me performanc\u00ebn mund t\u00eb ndodhi n\u00eb nj\u00eb k\u00ebrkes\u00eb t\u00eb caktuar, kur p\u00ebr shembull nevojitet t\u00eb llogariten t\u00eb gjitha blloqet, nd\u00ebrsa n\u00eb rastin e Virtuozzo Storage, regjistrimi i blloqeve t\u00eb modifikuara b\u00ebhet duke p\u00ebrdorur qasjen \u201clog-structured file system\u201d, q\u00eb minimizon shpenzimet mbi llogaritjen e paritetit. P\u00ebr t\u00eb paramenduar p\u00ebraf\u00ebrsisht opsionet p\u00ebr p\u00ebrshpejtimin e pun\u00ebs me EC dhe pa, ka <noindex><a rel=\"nofollow\" href=\"https:\/\/www.virtuozzo.com\/products\/virtuozzo-storage\/storage-calculator\">nj\u00eb kalkulator.<\/a><\/noindex> \u2013 numrat mund t\u00eb jen\u00eb p\u00ebraf\u00ebrsisht t\u00eb varur nga koeficienti i sakt\u00ebsis\u00eb s\u00eb prodhuesit t\u00eb pajisjeve, por rezultati i llogaritjeve ndihmon shum\u00eb p\u00ebr t\u00eb planifikuar konfigurimin.<\/p>\n<p>Nj\u00eb skem\u00eb e thjesht\u00eb e komponent\u00ebve t\u00eb ruajtjes nuk do t\u00eb thot\u00eb se k\u00ebta komponent\u00eb nuk konsumojn\u00eb <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.virtuozzo.com\/virtuozzo_7_installation_guide\/preparing-for-installation\/planning-storage-cli.html#hardware-requirements\">burime hardueri,<\/a><\/noindex> por n\u00ebse llogariten t\u00eb gjitha shpenzimet paraprakisht, at\u00ebher\u00eb mund t\u00eb pritet nj\u00eb bashk\u00ebpunim pran\u00eb hipervizorit. <br \/>\nKa nj\u00eb skem\u00eb krahasimi t\u00eb konsumit t\u00eb burimeve harduerike nga sh\u00ebrbimet Ceph dhe Virtuozzo storage.<\/p>\n<p><img decoding=\"async\" alt=\"Krahasim i shkurt\u00ebr i arkitektur\u00ebs SDS ose gjetja e platform\u00ebs s\u00eb p\u00ebrshtatshme t\u00eb ruajtjes (GlusterVsCephVsVirtuozzoStorage)\" src=\"\/wp-content\/uploads\/2020\/02\/27de0ab0cc61c2fab6d741bc3105b6cc.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nN\u00ebse m\u00eb par\u00eb, krahasimi i Gluster dhe Ceph mund t\u00eb b\u00ebhej sipas artikujve t\u00eb vjet\u00ebr, duke p\u00ebrdorur rreshtat m\u00eb t\u00eb r\u00ebnd\u00ebsish\u00ebm prej tyre, tani me Virtuozzo \u00ebsht\u00eb m\u00eb e komplikuar. Artikujt p\u00ebr k\u00ebt\u00eb produkt nuk jan\u00eb aq t\u00eb shumt\u00eb dhe informacioni mund t\u00eb merret vet\u00ebm nga dokumentacioni n\u00eb <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.virtuozzo.com\/master\/index.html\">anglisht<\/a><\/noindex> ose n\u00eb rusisht n\u00ebse merret parasysh Vstorage si nj\u00eb ruajtje e p\u00ebrdorur n\u00eb disa zgjidhje hiper t\u00eb konverguara n\u00eb kompani si <noindex><a rel=\"nofollow\" href=\"http:\/\/rosplatforma.ru\/#downloads\">Rospalatforma<\/a><\/noindex> dhe Acronis.<\/p>\n<p>Do ta provoj ndihmoj me p\u00ebrshkrimin e k\u00ebsaj arkitekture, prandaj teksti do t\u00eb jet\u00eb pak m\u00eb i gjat\u00eb, por p\u00ebr t\u00eb kuptuar dokumentacionin vet\u00eb, k\u00ebrkohet shum\u00eb koh\u00eb, dhe dokumentacioni ekzistues mund t\u00eb p\u00ebrdoret vet\u00ebm si referenc\u00eb duke rishikuar p\u00ebrmbajtjen ose duke k\u00ebrkuar me fjal\u00eb ky\u00e7e. <\/p>\n<p>Le t\u00eb shqyrtojm\u00eb procesin e regjistrimit n\u00eb nj\u00eb konfigurim hibrid t\u00eb harduerit me komponent\u00ebt e p\u00ebrshkruar m\u00eb sip\u00ebr: regjistrimi fillon n\u00eb at\u00eb nyje nga e cila e iniciatoi klienti (sh\u00ebrbimi i pik\u00ebs s\u00eb montimit FUSE), por komponenti kryesor i sh\u00ebrbimit t\u00eb metadata (MDS) natyrisht do ta drejtoj\u00eb klientin direkt te sh\u00ebrbimi i \u00e7ankut q\u00eb i nevojitet (sh\u00ebrbimi i ruajtjes s\u00eb blloqeve CS), dmth MDS nuk merr pjes\u00eb n\u00eb procesin e regjistrimit, ai vet\u00ebm e drejton at\u00eb te sh\u00ebrbimi i nevojsh\u00ebm t\u00eb \u00e7ankut. N\u00eb thelb, mund t\u00eb sjellim nj\u00eb analogji t\u00eb regjistrimit me derdhjen e ujit n\u00eb fu\u00e7i. \u00c7do fu\u00e7i \u00ebsht\u00eb nj\u00eb bllok t\u00eb dh\u00ebnash prej 256MB.<\/p>\n<p><img decoding=\"async\" alt=\"Krahasim i shkurt\u00ebr i arkitektur\u00ebs SDS ose gjetja e platform\u00ebs s\u00eb p\u00ebrshtatshme t\u00eb ruajtjes (GlusterVsCephVsVirtuozzoStorage)\" src=\"\/wp-content\/uploads\/2020\/02\/8f10333f1573226fbb50a40377eafc93.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPra, nj\u00eb disk \u00ebsht\u00eb nj\u00eb sasi e caktuar e till\u00eb fu\u00e7ish, dmth v\u00ebllimi i diskut \u00ebsht\u00eb i ndar\u00eb n\u00eb 256MB. \u00c7do kopje derdhet n\u00eb nj\u00eb nyje, e dyta pothuajse paralelisht n\u00eb nj\u00eb nyje tjet\u00ebr, etj... N\u00ebse kemi tre replika dhe disk SSD p\u00ebr kujtes\u00ebn (p\u00ebr lexim dhe revista regjistrimi), at\u00ebher\u00eb konfirmimi i regjistrimit do t\u00eb ndodh\u00eb pas regjistrimit t\u00eb revist\u00ebs n\u00eb SSD, dhe sh\u00ebnimi paralel nga SSD do t\u00eb vazhdoj\u00eb n\u00eb HDD, si\u00e7 do t\u00eb ishte n\u00eb nj\u00eb m\u00ebnyr\u00eb sfond. N\u00eb rastin e tre replikave, komiti i regjistrimit do t\u00eb ndodh\u00eb pas konfirmimit nga SSD i nyj\u00ebs s\u00eb tret\u00eb. Mund t\u00eb duket se shpejt\u00ebsia e regjistrimit t\u00eb tre SSD mund t\u00eb ndahet n\u00eb tre dhe do t\u00eb marrim shpejt\u00ebsin\u00eb e regjistrimit t\u00eb nj\u00eb replike, por regjistrimi i kopjave ndodh n\u00eb paralel dhe latency e rrjetit zakonisht \u00ebsht\u00eb m\u00eb e lart\u00eb se ajo e SSD, dhe n\u00eb thelb, performanca e regjistrimit do t\u00eb varet nga rrjeti. P\u00ebr k\u00ebt\u00eb arsye, p\u00ebr t\u00eb par\u00eb IOPS reale, \u00ebsht\u00eb e nevojshme t\u00eb ngarkoni n\u00eb m\u00ebnyr\u00eb t\u00eb duhur t\u00eb gjith\u00eb Vstorage sipas <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.virtuozzo.com\/pdf\/virtuozzo_infrastructure_platform_3_benchmarking_guide.pdf\">metodologjis\u00eb<\/a><\/noindex>, dmth t\u00eb testoni ngarkes\u00ebn reale, jo kujtes\u00ebn dhe \u043a\u0435\u0448in, ku duhet t\u00eb merren parasysh madh\u00ebsia e sakt\u00eb e bllokut t\u00eb t\u00eb dh\u00ebnave, numri i rrjedhave etj. <\/p>\n<p>Revista de logare men\u021bionat\u0103 mai sus pe SSD func\u021bioneaz\u0103 astfel \u00eenc\u00e2t, imediat ce datele ajung \u00een ea, sunt citite de serviciu \u0219i scrise pe HDD. Exist\u0103 mai multe servicii de metadate (MDS) pe cluster, iar num\u0103rul lor este determinat de cvorumul care func\u021bioneaz\u0103 pe baza algoritmului Paxos. Din perspectiva clientului, punctul de montare FUSE este un folder de stocare a clusterului, care este vizibil tuturor nodurilor clusterului, fiecare nod av\u00e2nd un client montat conform acestui principiu, astfel \u00eenc\u00e2t fiecare nod are acces la acest stocaj.<\/p>\n<p>Pentru performan\u021ba oric\u0103ruia dintre abord\u0103rile men\u021bionate mai sus, este foarte important, \u00een faza de planificare \u0219i desf\u0103\u0219urare, s\u0103 se configureze corect re\u021beaua \u00een care va avea loc echilibrarea prin agregare \u0219i s\u0103 se selecteze corect l\u0103\u021bimea de band\u0103 a canalului de re\u021bea. \u00cen agregare, este esen\u021bial s\u0103 se selecteze corect modul de hash \u0219i dimensiunile cadrelor. Exist\u0103, de asemenea, o diferen\u021b\u0103 semnificativ\u0103 fa\u021b\u0103 de SDS-urile men\u021bionate mai sus, \u0219i anume FUSE cu tehnologia fast path \u00een Virtuozzo Storage. Aceasta, pe l\u00e2ng\u0103 FUSE-ul modernizat, \u00een contrast cu celelalte solu\u021bii open source, cre\u0219te semnificativ IOPS-urile \u0219i permite scalarea at\u00e2t orizontal\u0103, c\u00e2t \u0219i vertical\u0103. \u00cen general, comparativ cu arhitecturile men\u021bionate anterior, aceasta pare mai puternic\u0103, dar pentru acest privilegiu, cu siguran\u021b\u0103, este necesar s\u0103 se achizi\u021bioneze licen\u021be, spre deosebire de Ceph \u0219i Gluster. <\/p>\n<p>\u00cen concluzie, se poate eviden\u021bia topul format din trei: primul loc \u00een ceea ce prive\u0219te performan\u021ba \u0219i fiabilitatea arhitecturii este ocupat de Virtuozzo Storage, al doilea loc este pentru Ceph, iar al treilea pentru Gluster. <\/p>\n<p>Criteriile pentru care a fost ales Virtuozzo Storage sunt: un set optim de componente ale arhitecturii, FUSE-ul modernizat pentru aceast\u0103 abordare cu fast path, un set flexibil de configura\u021bie hardware, un consum mai mic de resurse \u0219i posibilitatea de a fi utilizat \u00eempreun\u0103 cu compute (calculare\/virtualizare), ceea ce \u00eel face complet potrivit pentru o solu\u021bie hiperconvergent\u0103, \u00een cadrul c\u0103reia este inclus. Al doilea loc este ocupat de Ceph, deoarece este o arhitectur\u0103 mai performant\u0103 comparativ cu Gluster, datorit\u0103 oper\u0103rii cu blocuri, precum \u0219i scenariilor mai flexibile \u0219i capacit\u0103\u021bii de a lucra \u00een clustere de dimensiuni mai mari.<\/p>\n<p>N\u00eb planet tona \u00ebsht\u00eb d\u00ebshira t\u00eb shkruajm\u00eb nj\u00eb krahasim nd\u00ebrmjet vSAN, Space Direct Storage, Vstorage dhe Nutanix Storage, p\u00ebr t\u00eb testuar Vstorage n\u00eb pajisje HPE, Huawei, si dhe skenar\u00ebt e integrimit t\u00eb Vstorage me pajisje t\u00eb jashtme t\u00eb SHTM-ve, prandaj n\u00ebse ky artikull ju ka p\u00eblqyer, do t\u00eb ishte mir\u00eb t\u00eb merrnim nga ju komente q\u00eb mund t\u00eb forcojn\u00eb motivimin p\u00ebr artikuj t\u00eb rinj, duke pasur parasysh v\u00ebrejtjet dhe d\u00ebshirat tuaja.<br \/>\n<br \/>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/486392\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u0430\u043d\u043d\u0430\u044f \u0441\u0442\u0430\u0442\u044c\u044f \u043d\u0430\u043f\u0438\u0441\u0430\u043d\u0430 \u0434\u043b\u044f \u0442\u043e\u0433\u043e, \u0447\u0442\u043e\u0431\u044b \u043f\u043e\u043c\u043e\u0447\u044c \u0432\u044b\u0431\u0440\u0430\u0442\u044c \u0434\u043b\u044f \u0441\u0435\u0431\u044f \u043f\u043e\u0434\u0445\u043e\u0434\u044f\u0449\u0435\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \u0438 \u043f\u043e\u043d\u044f\u0442\u044c \u043e\u0442\u043b\u0438\u0447\u0438\u044f \u043c\u0435\u0436\u0434\u0443 \u0442\u0430\u043a\u0438\u043c\u0438 SDS \u043a\u0430\u043a Gluster, Ceph \u0438 Vstorage (Virtuozzo). \u0412 \u0442\u0435\u043a\u0441\u0442\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442\u0441\u044f \u0441\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0441\u0442\u0430\u0442\u044c\u0438 \u0441 \u0431\u043e\u043b\u0435\u0435 \u0434\u0435\u0442\u0430\u043b\u044c\u043d\u044b\u043c \u0440\u0430\u0441\u043a\u0440\u044b\u0442\u0438\u0435\u043c \u0442\u0435\u0445 \u0438\u043b\u0438 \u0438\u043d\u044b\u0445 \u043f\u0440\u043e\u0431\u043b\u0435\u043c, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u044f \u0431\u0443\u0434\u0443\u0442 \u043c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e \u043a\u0440\u0430\u0442\u043a\u0438\u043c\u0438 \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043a\u043b\u044e\u0447\u0435\u0432\u044b\u0445 \u043c\u043e\u043c\u0435\u043d\u0442\u043e\u0432 \u0431\u0435\u0437 \u043b\u0438\u0448\u043d\u0435\u0439 \u0432\u043e\u0434\u044b \u0438 \u0432\u0432\u043e\u0434\u043d\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438, \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u0432\u044b [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":40730,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-40729","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - 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