{"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 k\u00ebrkimi p\u00ebr nj\u00eb platform\u00eb ruajtjeje t\u00eb p\u00ebrshtatshme (GlusterVsCephVsVirtuozzoStorage)","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ky artikull \u00ebsht\u00eb shkruar p\u00ebr t\u00eb ndihmuar n\u00eb zgjedhjen e zgjidhjes s\u00eb duhur dhe p\u00ebr t\u00eb kuptuar dallimet midis SDS si Gluster, Ceph dhe Vstorage (Virtuozzo).<\/p>\n<p>N\u00eb tekst jan\u00eb p\u00ebrdorur lidhje n\u00eb artikuj me nj\u00eb shpjegim m\u00eb t\u00eb detajuar t\u00eb problemeve t\u00eb ndryshme, ndaj p\u00ebrshkrimet do t\u00eb jen\u00eb sa m\u00eb t\u00eb shkurt\u00ebr duke p\u00ebrdorur pika ky\u00e7e pa uj\u00eb t\u00eb tep\u00ebrt dhe informacion hyr\u00ebse, t\u00eb cilat mund t'i gjeni vet\u00eb n\u00eb hap\u00ebsir\u00ebn e internetit. <\/p>\n<p>N\u00eb t\u00eb v\u00ebrtet\u00eb, temat q\u00eb trajtohen k\u00ebrkojn\u00eb nj\u00eb ton t\u00eb caktuar, por n\u00eb bot\u00ebn moderne, gjithnj\u00eb e m\u00eb shum\u00eb njer\u00ebz nuk e duan t\u00eb lexojn\u00eb shum\u00eb))), ndaj mund t\u00eb b\u00ebhet nj\u00eb lexim i shpejt\u00eb dhe t\u00eb b\u00ebsh nj\u00eb zgjedhje, dhe n\u00ebse ka di\u00e7ka t\u00eb paqart\u00eb mund t\u00eb kalosh n\u00eb lidhje ose t\u00eb gurgullosh fjal\u00eb t\u00eb paqarta))), dhe ky artikull \u00ebsht\u00eb si nj\u00eb mb\u00ebshtjell\u00ebs transparent p\u00ebr k\u00ebto tema t\u00eb thella, duke treguar p\u00ebrmbajtjen - momentet kryesore t\u00eb secil\u00ebs zgjidhje.<\/p>\n<h3>Gluster<\/h3>\n<p>\nLe t\u00eb fillojm\u00eb me Gluster, i cili p\u00ebrdoret aktivisht nga prodhuesit e platformave hiper-konvergjente me SDS t\u00eb bazuar n\u00eb open source p\u00ebr mjedise virtuale dhe mund t\u00eb gjendet n\u00eb faqen e internetit t\u00eb RedHat n\u00eb seksionin storage, ku ofrohet mund\u00ebsia t\u00eb zgjidhni 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 skedareve etj. Brick \u2013 sh\u00ebrbimi q\u00eb trajton nj\u00eb disk, Volume \u2013 nj\u00eb v\u00ebllim (pools) \u2013 q\u00eb bashkon k\u00ebto brick. M\u00eb pas ka nj\u00eb sh\u00ebrbim p\u00ebr shp\u00ebrndarjen e skedareve n\u00eb grupe fal\u00eb funksionalitetit DHT (tabela e shkall\u00ebzuar e shp\u00ebrndarjes). Nuk do ta p\u00ebrfshijm\u00eb sh\u00ebrbimin Sharding n\u00eb k\u00ebt\u00eb p\u00ebrshkrim pasi n\u00eb lidhjet e paraqitura m\u00eb posht\u00eb do t\u00eb gjeni p\u00ebrshkrime t\u00eb problemeve q\u00eb lidhen me t\u00eb.<\/p>\n<p><img decoding=\"async\" alt=\"Krahasim i shkurt\u00ebr i arkitektur\u00ebs SDS ose k\u00ebrkimi p\u00ebr nj\u00eb platform\u00eb ruajtjeje t\u00eb p\u00ebrshtatshme (GlusterVsCephVsVirtuozzoStorage)\" src=\"\/wp-content\/uploads\/2020\/02\/0c54588b5b09c9069ffbd0c5161c5e34.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKur shkruhet nj\u00eb skedar, ai shkruhet krejt\u00ebsisht n\u00eb brick dhe nj\u00eb kopje e tij shkruhet paralelisht n\u00eb brick n\u00eb serverin e dyt\u00eb. M\u00eb pas, skedari i dyt\u00eb do t\u00eb shkruhet n\u00eb grupin e dyt\u00eb t\u00eb dy brick'ave (ose m\u00eb shum\u00eb) n\u00eb servera t\u00eb ndrysh\u00ebm.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex> <br \/>\nN\u00ebse skedar\u00ebt kan\u00eb p\u00ebraf\u00ebrsisht t\u00eb nj\u00ebjt\u00ebn madh\u00ebsi 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 kushte t\u00eb tjera do t\u00eb lindin problemet e p\u00ebrshkruara si m\u00eb posht\u00eb: <\/p>\n<ul>\n<li>vendet n\u00eb grupe shp\u00ebrndahet n\u00eb m\u00ebnyr\u00eb t\u00eb pabarabart\u00eb, kjo varet nga p\u00ebrmasat e skedar\u00ebve dhe n\u00ebse n\u00eb grup nuk ka mjaftuesh\u00ebm vend p\u00ebr t\u00eb shkruar skedarin - do t\u00eb merrni nj\u00eb gabim, skedari nuk do t\u00eb shkruhet dhe nuk do t\u00eb shp\u00ebrndahet n\u00eb nj\u00eb grup tjet\u00ebr;<\/li>\n<li>kur shkruhet nj\u00eb skedar, IO ndodh vet\u00ebm n\u00eb nj\u00eb grup, grupet e tjera mbeten t\u00eb pap\u00ebrdorura;<\/li>\n<li>nuk \u00ebsht\u00eb e mundur t\u00eb marr\u00ebsh IO t\u00eb gjith\u00eb volumit kur shkruan nj\u00eb skedar;<\/li>\n<li>dhe koncepti i p\u00ebrgjithsh\u00ebm duket m\u00eb pak efikas 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 realizosh balancimin dhe t\u00eb zgjidh\u00ebsh problemin e shp\u00ebrndarjes s\u00eb barabart\u00eb, p\u00ebrve\u00e7se si\u00e7 \u00ebsht\u00eb tani q\u00eb skedari vendoset n\u00eb bllok t\u00eb 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> vjen edhe ndjenj\u00eb e paq\u00ebllimshme se gluster funksionon si nj\u00eb ruajt\u00ebs skedari mbi RAID-in klasik harduerik. Ishte tentuar t\u00eb zhvillohej ndarje (Sharding) e skedar\u00ebve n\u00eb blloqe, por k\u00ebto jan\u00eb shtesa q\u00eb sjellin humbje t\u00eb performanc\u00ebs mbi qasjen ekzistuese arkitekturore, plus p\u00ebrdorimi i komponent\u00ebve t\u00eb l\u00ebshuar falas me kufizime n\u00eb performanc\u00eb si Fuse. Nuk ka sh\u00ebrbime t\u00eb metadatas, q\u00eb e kufizon performanc\u00ebn dhe disponueshm\u00ebrin\u00eb e ruajtjes gjat\u00eb shp\u00ebrndarjes s\u00eb skedar\u00ebve n\u00eb blloqe. Performanca m\u00eb e mir\u00eb mund t\u00eb v\u00ebrehet n\u00eb konfigurimin \u201cDistributed Replicated\u201d dhe numri i nodave duhet t\u00eb jet\u00eb t\u00eb pakt\u00ebn 6 p\u00ebr t\u00eb organizuar nj\u00eb replikim t\u00eb besuesh\u00ebm n\u00eb 3 me shp\u00ebrndarje optimale t\u00eb ngarkes\u00ebs.<\/p>\n<p>K\u00ebto p\u00ebrfundime jan\u00eb gjithashtu t\u00eb lidhura 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 gjat\u00eb krahasimit 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 n\u00eb kuptimin e k\u00ebsaj konfigurimi m\u00eb t\u00eb avancuar 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 k\u00ebrkimi p\u00ebr nj\u00eb platform\u00eb ruajtjeje t\u00eb p\u00ebrshtatshme (GlusterVsCephVsVirtuozzoStorage)\" src=\"\/wp-content\/uploads\/2020\/02\/6868ddf69e18bec0b50ae5aeba74440d.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nN\u00eb imazh tregohet shp\u00ebrndarja e ngarkes\u00ebs gjat\u00eb regjistrimit t\u00eb dy skedar\u00ebve, ku kopjet e skedarit t\u00eb par\u00eb shp\u00ebrndahen n\u00eb tre serverat e par\u00eb, t\u00eb cil\u00ebt jan\u00eb t\u00eb grupuar n\u00eb grupin volume 0, dhe tre kopjet e skedarit t\u00eb dyt\u00eb vendosen n\u00eb grupin e dyt\u00eb volume 1 t\u00eb tre server\u00ebve. \u00c7do server ka nj\u00eb disk.<\/p>\n<p>Konkluzioni \u00ebsht\u00eb se mund t\u00eb p\u00ebrdoret Gluster, por me kuptimin se ka kufizime n\u00eb performanc\u00eb dhe q\u00ebndrueshm\u00ebri, t\u00eb cilat krijojn\u00eb v\u00ebshtir\u00ebsi n\u00eb kushte t\u00eb caktuara t\u00eb zgjidhjeve hiper-konverguese, ku burimet nevojiten gjithashtu p\u00ebr ngarkesa t\u00eb llogaritjeve t\u00eb mjediseve virtuale. <\/p>\n<p>Ka disa gjithashtu tregues t\u00eb performanc\u00ebs s\u00eb Gluster q\u00eb mund t\u00eb arrihen n\u00ebn kushte t\u00eb caktuara. <noindex><a rel=\"nofollow\" href=\"http:\/\/moo.nac.uci.edu\/~hjm\/Performance_in_a_Gluster_Systemv6F.pdf\"> q\u00ebndrueshm\u00ebris\u00eb.<\/a><\/noindex><\/p>\n<h3>Ceph<\/h3>\n<p>\nTani le t\u00eb shqyrtojm\u00eb Ceph nga p\u00ebrshkrimet e arkitektur\u00ebs, t\u00eb cilat kam arritur t\u00eb gjej. <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/313644\/\">gjeni.<\/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 vendoset n\u00eb servera t\u00eb ve\u00e7ant\u00eb, pasi sh\u00ebrbimeve t\u00eb tij u nevojiten t\u00eb gjitha burimet e harduerit n\u00ebn ngarkesa. <\/p>\n<p>Arkitektura <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.ceph.com\/docs\/mimic\/architecture\/\">Ceph<\/a><\/noindex> m\u00eb e komplikuar se Gluster, dhe ka sh\u00ebrbime si sh\u00ebrbimet e meta-datat, por e gjith\u00eb staka e komponent\u00ebve \u00ebsht\u00eb mjaft e nd\u00ebrlikuar dhe jo shum\u00eb fleksibile p\u00ebr t'u p\u00ebrdorur n\u00eb zgjidhjet e virtualizimit. T\u00eb dh\u00ebnat jan\u00eb t\u00eb vendosura 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\u00eb disa ngarkesa dhe kushte emergjente, p\u00ebr shembull, e m\u00ebposhtme. <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/oleg-bunin\/blog\/431536\/\">artikulli.<\/a><\/noindex><\/p>\n<p>Nga p\u00ebrshkrimi i arkitektur\u00ebs, zemra \u00ebsht\u00eb CRUSH, fal\u00eb t\u00eb cilit zgjidhet vendi p\u00ebr vendosjen e t\u00eb dh\u00ebnave. M\u00eb pas vjen PG \u2013 kjo \u00ebsht\u00eb abstraksioni m\u00eb i komplikuar (grupi logjik) p\u00ebr t'u kuptuar. PG-t\u00eb jan\u00eb t\u00eb nevojshme q\u00eb CRUSH t\u00eb jet\u00eb m\u00eb efikas. Q\u00ebllimi kryesor i PG-s\u00eb \u00ebsht\u00eb grumbullimi i objekteve p\u00ebr t\u00eb reduktuar konsumimin e burimeve, p\u00ebr t\u00eb rritur performanc\u00ebn dhe shkall\u00ebzueshm\u00ebrin\u00eb. Adresimi i objekteve direkt, ve\u00e7 e ve\u00e7, pa i grupuar ato n\u00eb PG do t\u00eb ishte shum\u00eb i kushtuesh\u00ebm. OSD \u2013 \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 k\u00ebrkimi p\u00ebr nj\u00eb platform\u00eb ruajtjeje t\u00eb p\u00ebrshtatshme (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 k\u00ebrkimi p\u00ebr nj\u00eb platform\u00eb ruajtjeje t\u00eb p\u00ebrshtatshme (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 grupe t\u00eb dh\u00ebnash me q\u00ebllime t\u00eb ndryshme dhe me cil\u00ebsime t\u00eb ndryshme. Grupet ndahen n\u00eb grupe vendosjeje. N\u00eb grupet vendosjeje ruhen objektet q\u00eb aksesohen nga klient\u00ebt. N\u00eb k\u00ebt\u00eb nivel logjik p\u00ebrfundon dhe fillon niveli fizik, pasi \u00e7do grup vendosjeje \u00ebsht\u00eb i lidhur me nj\u00eb disk kryesor dhe disa disqe replik\u00eb (sa t\u00eb tilla, varet nga faktori i replikimit t\u00eb grupit). Me fjal\u00eb t\u00eb tjera, n\u00eb nivelin logjik, objekti ruhet n\u00eb nj\u00eb grup vendosjeje t\u00eb caktuar, nd\u00ebrsa n\u00eb nivelin fizik \u2014 n\u00eb disqet q\u00eb jan\u00eb lidhur me t\u00eb. N\u00eb t\u00eb nj\u00ebjt\u00ebn koh\u00eb, disqet fizikisht mund t\u00eb q\u00ebndrojn\u00eb n\u00eb nyje 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 gjithsej zgjidhjes, por nj\u00ebkoh\u00ebsisht si nj\u00eb lidhje e tep\u00ebrt n\u00eb k\u00ebt\u00eb zinxhir, q\u00eb pa dashje ndihmon n\u00eb mendime p\u00ebr humbjet n\u00eb performanc\u00eb. P\u00ebr shembull, kur regjistrohen t\u00eb dh\u00ebnat, 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 diskun e replikave. K\u00ebshtu, funksioni hash funksionon gjat\u00eb k\u00ebrkimit dhe vendosjes s\u00eb objektit, por ka nj\u00eb efekt an\u00ebsor \u2013 kjo k\u00ebrkon shpenzime shum\u00eb t\u00eb m\u00ebdha dhe kufizime n\u00eb rind\u00ebrtimin e hash-it (n\u00eb rastin e shtimit ose fshirjes s\u00eb disku). Nj\u00eb problem tjet\u00ebr i hash-it \u00ebsht\u00eb vendosja e dh\u00ebnave q\u00eb \u00ebsht\u00eb e ngurt\u00eb dhe nuk mund t\u00eb ndryshohet. K\u00ebshtu, n\u00ebse ndonj\u00eb disk p\u00ebrjeton nj\u00eb ngarkes\u00eb t\u00eb madhe, sistemi nuk ka mund\u00ebsi t\u00eb shkruaj\u00eb n\u00eb t\u00eb (duke zgjedhur nj\u00eb disk tjet\u00ebr); funksioni hash e detyron vendosjen e t\u00eb dh\u00ebnave sipas nj\u00eb rregulli, pavar\u00ebsisht se sa i keq i \u00ebsht\u00eb situata diskut. Prandaj, Ceph konsumon shum\u00eb memorie gjat\u00eb rind\u00ebrtimit t\u00eb PG n\u00eb rastin e vet\u00eb-sh\u00ebrimit ose zgjerimit t\u00eb ruajtjes. Konkluzioni \u00ebsht\u00eb se Ceph funksionon mir\u00eb (ndon\u00ebse ngadal\u00eb), por vet\u00ebm kur nuk ka zgjerim, situata emergjente ose p\u00ebrdit\u00ebsim.<\/p>\n<p>Sigurisht ka mund\u00ebsi p\u00ebr t\u00eb p\u00ebrmir\u00ebsuar performanc\u00ebn p\u00ebrmes caching dhe cache-tiering, por kjo k\u00ebrkon harduer t\u00eb mir\u00eb dhe do t\u00eb ket\u00eb humbje gjithsesi. Sidoqoft\u00eb, n\u00eb p\u00ebrgjith\u00ebsi Ceph duket m\u00eb t\u00ebrheq\u00ebs se Gluster p\u00ebr produktet. Gjithashtu, kur p\u00ebrdorni k\u00ebto produkte, duhet t\u00eb keni parasysh nj\u00eb faktor t\u00eb r\u00ebnd\u00ebsish\u00ebm - niveli i lart\u00eb i kompetenc\u00ebs, p\u00ebrvoj\u00ebs dhe profesionalizmit me nj\u00eb theks t\u00eb madh n\u00eb Linux, pasi \u00ebsht\u00eb shum\u00eb e r\u00ebnd\u00ebsishme q\u00eb gjith\u00e7ka t\u00eb vihet n\u00eb pun\u00eb, konfigurohet dhe mbahen si\u00e7 duhet, q\u00eb i v\u00eb edhe m\u00eb shum\u00eb p\u00ebrgjegj\u00ebsi dhe ngarkes\u00eb mbi administratorin. <\/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>, q\u00eb 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\">harduer<\/a><\/noindex>, por \u00ebsht\u00eb shum\u00eb e r\u00ebnd\u00ebsishme ta konfiguroni si\u00e7 duhet p\u00ebr t\u00eb arritur nj\u00eb performanc\u00eb t\u00eb mir\u00eb. Pra, duke instaluar nj\u00eb produkt t\u00eb till\u00eb nga kutia n\u00eb \u00e7do lloj konfigurimi pa marr\u00eb parasysh rekomandimet sipas arkitektur\u00ebs 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 ruajtjen af\u00ebr sh\u00ebrbimeve t\u00eb hipervizorit kvm-qemu, dhe kjo \u00ebsht\u00eb vet\u00ebm nj\u00eb grup sh\u00ebrbimesh, ku shihet nj\u00eb hierarki e kompakt\u00eb optimale e komponent\u00ebve: sh\u00ebrbimi i klientit i montuar p\u00ebrmes FUSE (i modifikuar, jo open source), sh\u00ebrbimi i metadata MDS (Metadata service), sh\u00ebrbimi i blloqeve t\u00eb t\u00eb dh\u00ebnave Chunk service, i cili n\u00eb nivelin fizik \u00ebsht\u00eb i barabart\u00eb me nj\u00eb disk dhe kjo \u00ebsht\u00eb gjith\u00e7ka. N\u00eb shpejt\u00ebsi natyrisht, \u00ebsht\u00eb optimal t\u00eb p\u00ebrdorim nj\u00eb skem\u00eb t\u00eb q\u00ebndrueshm\u00ebris\u00eb me dy kopje, por n\u00ebse p\u00ebrdoren caching dhe regjistrat n\u00eb disk SSD, at\u00ebher\u00eb kodimi p\u00ebr mbrojtje nga nd\u00ebrprerjet (erase coding ose raid6) mund t\u00eb p\u00ebrshpejtohet duksh\u00ebm n\u00eb nj\u00eb skem\u00eb hibride ose madje edhe m\u00eb mir\u00eb n\u00eb all flash. Me EC (erase coding) ka nj\u00eb disavantazh: kur ndryshohet nj\u00eb bllok t\u00eb dh\u00ebnash, nevojitet t\u00eb llogaritet p\u00ebrs\u00ebri shuma e paritetit. P\u00ebr t\u00eb zgjidhur humbjet n\u00eb k\u00ebt\u00eb operacion, Ceph shkruan n\u00eb EC rezerva dhe problemi me performanc\u00ebn mund t\u00eb ndodh\u00eb gjat\u00eb nj\u00eb k\u00ebrkese t\u00eb caktuar, kur, p\u00ebr shembull, nevojitet t\u00eb llogariten t\u00eb gjith\u00eb blloqet, nd\u00ebrsa n\u00eb rastin e Virtuozzo Storage, regjistrimi i blloqeve t\u00eb ndryshuara b\u00ebhet duke p\u00ebrdorur qasjen \u201clog-structured file system\u201d, e cila minimizon kostot p\u00ebr llogaritjen e paritetit. P\u00ebr t\u00eb marr\u00eb nj\u00eb ide t\u00eb p\u00ebraf\u00ebrt p\u00ebr alternativat me p\u00ebrshpejtim t\u00eb pun\u00ebs me EC dhe pa, ka <noindex><a rel=\"nofollow\" href=\"https:\/\/www.virtuozzo.com\/products\/virtuozzo-storage\/storage-calculator\">kalkulator.<\/a><\/noindex> \u2013 numrat mund t\u00eb jen\u00eb t\u00eb p\u00ebraf\u00ebrt n\u00eb var\u00ebsi t\u00eb koeficientit t\u00eb sakt\u00ebsis\u00eb s\u00eb prodhuesit t\u00eb pajisjeve, por rezultati i llogaritjeve ndihmon mir\u00eb n\u00eb planifikimin e konfiguracionit.<\/p>\n<p>Nj\u00eb skem\u00eb e thjesht\u00eb e komponent\u00ebve t\u00eb ruajtjes nuk do t\u00eb thot\u00eb q\u00eb 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 t\u00eb harduerit,<\/a><\/noindex> por n\u00ebse llogariten t\u00eb gjitha shpenzimet paraprakisht, at\u00ebher\u00eb mund t\u00eb shpresohet p\u00ebr nj\u00eb bashk\u00ebpunim p\u00ebrkrah hipervizorit. <br \/>\nKa nj\u00eb skem\u00eb krahasimi t\u00eb konsumit t\u00eb burimeve t\u00eb harduerit nga sh\u00ebrbimet Ceph dhe Virtuozzo storage.<\/p>\n<p><img decoding=\"async\" alt=\"Krahasim i shkurt\u00ebr i arkitektur\u00ebs SDS ose k\u00ebrkimi p\u00ebr nj\u00eb platform\u00eb ruajtjeje t\u00eb p\u00ebrshtatshme (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 nga ata, tani \u00ebsht\u00eb m\u00eb e v\u00ebshtir\u00eb me Virtuozzo. 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 shqyrtohet Vstorage si nj\u00eb ruajtje e p\u00ebrdorur n\u00eb disa zgjidhje hiperzhvistuese n\u00eb kompani t\u00eb tilla si <noindex><a rel=\"nofollow\" href=\"http:\/\/rosplatforma.ru\/#downloads\">Rospatforma<\/a><\/noindex> dhe Acronis.<\/p>\n<p>Do t\u00eb provoj t\u00eb 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'u kuptuar dokumentacioni k\u00ebrkon shum\u00eb koh\u00eb, dhe dokumentacionin e disponuesh\u00ebm mund ta p\u00ebrdorim vet\u00ebm si udh\u00ebzues duke e shqyrtuar 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 nisi klienti (sh\u00ebrbimi i pik\u00ebs s\u00eb montimit FUSE), por komponenti i sh\u00ebrbimit t\u00eb metadatat (MDS) sigurisht q\u00eb do ta drejtoj\u00eb klientin drejtp\u00ebrdrejt n\u00eb sh\u00ebrbimin e nevojsh\u00ebm t\u00eb bllokut (sh\u00ebrbimi i ruajtjes CS), dometh\u00ebn\u00eb MDS nuk merr pjes\u00eb n\u00eb procesin e regjistrimit, por thjesht drejton n\u00eb sh\u00ebrbimin e nevojsh\u00ebm t\u00eb bllokut. N\u00eb p\u00ebrgjith\u00ebsi, mund t\u00eb japim nj\u00eb analogji t\u00eb regjistrimit, si derdhja 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 k\u00ebrkimi p\u00ebr nj\u00eb platform\u00eb ruajtjeje t\u00eb p\u00ebrshtatshme (GlusterVsCephVsVirtuozzoStorage)\" src=\"\/wp-content\/uploads\/2020\/02\/8f10333f1573226fbb50a40377eafc93.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPra ndaj, nj\u00eb disk \u00ebsht\u00eb nj\u00eb sasi e till\u00eb barr\u00eb, q\u00eb do t\u00eb thot\u00eb q\u00eb volumi i diskut ndahen n\u00eb 256MB. \u00c7do kopje shp\u00ebrndahet n\u00eb nj\u00eb n\u00ebnyr\u00eb, e dyta pothuajse paralelisht n\u00eb nj\u00eb n\u00ebnyr\u00eb tjet\u00ebr etj... N\u00ebse kemi tre replika dhe gjithashtu SSD p\u00ebr caching (p\u00ebr lexim dhe regjistrat e shkrimit), konfirmimi i shkrimit do t\u00eb ndodh\u00eb pas regjistrimit t\u00eb regjistrit n\u00eb SSD, dhe nd\u00ebrkoh\u00eb, shkarkimi paralel nga SSD do t\u00eb vazhdoj\u00eb n\u00eb HDD, si nj\u00eb proces n\u00eb prapavij\u00eb. N\u00eb rastin e tre replikave, konfirmimi i shkrimit do t\u00eb jet\u00eb pas konfirmimit nga SSD e n\u00ebnyr\u00ebs s\u00eb tret\u00eb. Mund t\u00eb duket se shpejt\u00ebsia e shkrimit t\u00eb tre SSD-ve mund t\u00eb ndaj\u00eb n\u00eb tre dhe do t\u00eb kemi shpejt\u00ebsin\u00eb e shkrimit t\u00eb nj\u00eb replike, por shkruarja e kopjeve ndodh paralelisht dhe latenca e rrjetit \u00ebsht\u00eb zakonisht m\u00eb e lart\u00eb se ajo e SSD-ve, dhe n\u00eb esenc\u00eb, performanca e shkrimit do t\u00eb varet nga rrjeti. Prandaj, p\u00ebr t\u00eb par\u00eb IOPS reale, \u00ebsht\u00eb e nevojshme t\u00eb ngarkohet sakt\u00ebsisht e 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>, q\u00eb do t\u00eb thot\u00eb, t\u00eb testosh ngarkes\u00ebn reale, dhe jo memorien dhe cache, ku \u00ebsht\u00eb e nevojshme t\u00eb merret parasysh madh\u00ebsia e duhur e bllokut t\u00eb t\u00eb dh\u00ebnave, numri i rrjedhave etj. <\/p>\n<p>Revista e p\u00ebrmendur mbi SSD funksionon n\u00eb m\u00ebnyr\u00eb q\u00eb sa her\u00eb q\u00eb t\u00eb dh\u00ebnat arrijn\u00eb, ato menj\u00ebher\u00eb lexohen nga sh\u00ebrbimi dhe shkruhen n\u00eb HDD. Ka disa sh\u00ebrbime t\u00eb metadatat (MDS) p\u00ebr grumbullin dhe numri i tyre p\u00ebrcaktohet nga kuorumi, i cili operon sipas algoritmit Paxos. Nga pik\u00ebpamja e klientit, pika e montimit FUSE \u00ebsht\u00eb nj\u00eb dosje e ruajtjes s\u00eb grumbullit, e cila \u00ebsht\u00eb e dukshme p\u00ebr t\u00eb gjitha nodet e grumbullit; \u00e7do nod\u00eb ka nj\u00eb klient t\u00eb montuar n\u00eb k\u00ebt\u00eb m\u00ebnyr\u00eb, prandaj kjo ruajtje \u00ebsht\u00eb e aksesueshme p\u00ebr \u00e7do nyje.<\/p>\n<p>P\u00ebr performanc\u00ebn e secil\u00ebs nga qasjet e p\u00ebrmendura m\u00eb sip\u00ebr, \u00ebsht\u00eb shum\u00eb e r\u00ebnd\u00ebsishme, n\u00eb faz\u00ebn e planifikimit dhe implementimit, t\u00eb konfigurohet si\u00e7 duhet rrjeti, ku do t\u00eb b\u00ebhet balancimi p\u00ebrmes agregimit dhe zgjedhjes s\u00eb duhur t\u00eb kapacitetit t\u00eb kanalit rrjet\u00eb. N\u00eb agregim \u00ebsht\u00eb e r\u00ebnd\u00ebsishme t\u00eb p\u00ebrzgjidhen n\u00eb m\u00ebnyr\u00eb t\u00eb duhur modet e hash-it dhe madh\u00ebsit\u00eb e frame-ve. Ka gjithashtu nj\u00eb dallim shum\u00eb t\u00eb fort\u00eb nga SDS-t\u00eb e p\u00ebrmendura m\u00eb sip\u00ebr, kjo \u00ebsht\u00eb fuse me teknologjin\u00eb fast path n\u00eb Virtuozzo Storage. I cili, p\u00ebrve\u00e7 fuse t\u00eb modernizuar, ndryshe nga zgjidhjet e tjera open source, ndjesh\u00ebm rrit IOPS-t\u00eb dhe lejon q\u00eb t\u00eb mos kufizoheni n\u00eb horizontal ose vertikal. N\u00eb p\u00ebrgjith\u00ebsi, n\u00eb krahasim me arkitekturat e p\u00ebrmendura m\u00eb sip\u00ebr, kjo duket m\u00eb e fuqishme, por p\u00ebr k\u00ebt\u00eb k\u00ebnaq\u00ebsi, natyrisht, nevojiten licenca, ndryshe nga Ceph dhe Gluster. <\/p>\n<p>Duke p\u00ebrmbledhur, mund t\u00eb theksojm\u00eb tri t\u00eb parat: vendi i par\u00eb p\u00ebr performanc\u00eb dhe besueshm\u00ebri n\u00eb arkitektur\u00eb i takon Virtuozzo Storage, vendi i dyt\u00eb Ceph dhe vendi i tret\u00eb Gluster. <\/p>\n<p>Kriteret p\u00ebr t\u00eb cilat u zgjodh Virtuozzo Storage: ky \u00ebsht\u00eb nj\u00eb set optimal komponent\u00ebsh arkitekture, i modernizuar p\u00ebr k\u00ebt\u00eb qasje Fuse me fast path, nj\u00eb grup fleksibil konfigurimi t\u00eb harduerit, konsum m\u00eb t\u00eb ul\u00ebt t\u00eb burimeve dhe mund\u00ebsin\u00eb e ndarjes me compute (llogaritjet\/virtualizimin), q\u00eb do t\u00eb thot\u00eb se \u00ebsht\u00eb plot\u00ebsisht i p\u00ebrshtatsh\u00ebm p\u00ebr nj\u00eb zgjidhje hiper-konvergjente, me t\u00eb cil\u00ebn ai shkon. Vendi i dyt\u00eb Ceph, sepse kjo \u00ebsht\u00eb nj\u00eb arkitektur\u00eb m\u00eb e fuqishme p\u00ebrpara Gluster, p\u00ebr shkak t\u00eb operimit me blloqe, si dhe skenar\u00ebve m\u00eb fleksib\u00ebl dhe mund\u00ebsis\u00eb p\u00ebr t\u00eb punuar n\u00eb klastera m\u00eb t\u00eb m\u00ebdhenj.<\/p>\n<p>N\u00eb planet \u00ebsht\u00eb d\u00ebshira p\u00ebr t\u00eb shkruar nj\u00eb krahasim midis vSAN, Space Direct Storage, Vstorage dhe Nutanix Storage, testimi i Vstorage n\u00eb pajisjet HPE, Huawei, si dhe skenar\u00ebt e integrimit t\u00eb Vstorage me pajisje t\u00eb jashtme t\u00eb sistemit t\u00eb ruajtjes, prandaj n\u00ebse artikulli ju p\u00eblqeu, do t\u00eb ishte mir\u00eb t\u00eb merrnim nga ju komente, t\u00eb cilat mund t\u00eb forcojn\u00eb motivimin p\u00ebr artikuj t\u00eb rinj duke marr\u00eb parasysh v\u00ebrejtjet dhe k\u00ebrkesat 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 5.0.0.1 - 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