{"id":31305,"date":"2019-10-31T21:40:34","date_gmt":"2019-10-31T18:40:34","guid":{"rendered":"https:\/\/prohoster.info\/blog\/realizatsiya-ssd-keshirovaniya-v-shd-qsan-xcubesan\/"},"modified":"2019-10-31T21:40:34","modified_gmt":"2019-10-31T18:40:34","slug":"realizatsiya-ssd-keshirovaniya-v-shd-qsan-xcubesan","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/realizatsiya-ssd-keshirovaniya-v-shd-qsan-xcubesan","title":{"rendered":"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Teknologjit\u00eb e rritjes s\u00eb performanc\u00ebs, t\u00eb bazuara n\u00eb p\u00ebrdorimin e SSD dhe t\u00eb aplikueshme gjer\u00ebsisht n\u00eb SAN, jan\u00eb shpikur prej koh\u00ebsh. S\u00eb pari, \u00ebsht\u00eb p\u00ebrdorimi i SSD si hap\u00ebsir\u00eb ruajtjeje, q\u00eb \u00ebsht\u00eb 100% efektive, por e shtrenjt\u00eb. Prandaj, p\u00ebrdoren teknologjit\u00eb e tier-ingut dhe caching, ku SSD p\u00ebrdoren vet\u00ebm p\u00ebr t\u00eb dh\u00ebnat m\u00eb t\u00eb k\u00ebrkuara (\u00abt\u00eb nxehta\u00bb). Tier-ing \u00ebsht\u00eb i mir\u00eb p\u00ebr skenar\u00ebt e p\u00ebrdorimit afatgjat\u00eb (dit\u00eb-jav\u00eb) t\u00eb t\u00eb dh\u00ebnave t\u00eb \u201cnxehta\u201d. Nd\u00ebrsa caching, p\u00ebrkundrazi, p\u00ebr p\u00ebrdorim afatshkurt\u00ebr (minuta-or\u00eb). T\u00eb dy alternativat jan\u00eb zbatuar n\u00eb SAN. <noindex><a rel=\"nofollow\" href=\"http:\/\/www.qsan.su\/goods\/sistemyi-xraneniya-dannyix\/\">QSAN XCubeSAN<\/a><\/noindex>. N\u00eb k\u00ebt\u00eb artikull ne do t\u00eb shqyrtojm\u00eb implementimin e algoritmit t\u00eb dyt\u00eb \u2013 <noindex><a rel=\"nofollow\" href=\"http:\/\/www.qsan.su\/soft\/san-os-4.0\/ssd-keshirovanie-(qcache-2.0).html\">SSD caching<\/a><\/noindex>.<\/p>\n<p>\n<img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/e2e97119a949509f4a3fe8e17a4238ac.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>Thelbi i teknologjis\u00eb s\u00eb SSD caching \u00ebsht\u00eb p\u00ebrdorimi i SSD si nj\u00eb nd\u00ebrmjet\u00ebsues midis hard disk\u00ebve dhe memories RAM t\u00eb kontrollorit. Performanca e SSD, natyrisht, \u00ebsht\u00eb m\u00eb e ul\u00ebt se performanca e caches s\u00eb vet\u00eb kontrollorit, por kapaciteti \u00ebsht\u00eb nj\u00eb rend m\u00eb i lart\u00eb. Prandaj, arrijm\u00eb nj\u00eb kompromis midis shpejt\u00ebsis\u00eb dhe kapacitetit.<\/p>\n<p><\/p>\n<p><b>Shenjat p\u00ebr p\u00ebrdorimin e SSD cache p\u00ebr lexim:<\/b><\/p>\n<p><\/p>\n<ul>\n<li>Dominimi i operacioneve t\u00eb leximit mbi operacionet e shkrimit (zakonisht tipike p\u00ebr bazat e t\u00eb dh\u00ebnave dhe aplikacionet web);<\/li>\n<li>Prania e nj\u00eb ngushtice n\u00eb performanc\u00ebn e grupeve t\u00eb hard disk\u00ebve;<\/li>\n<li>V\u00ebllimi i t\u00eb dh\u00ebnave t\u00eb k\u00ebrkuara \u00ebsht\u00eb m\u00eb i vog\u00ebl se v\u00ebllimi i SSD cache.<\/li>\n<\/ul>\n<p><\/p>\n<p>Shenjat p\u00ebr p\u00ebrdorimin e SSD cache p\u00ebr lexim + shkrim jan\u00eb t\u00eb nj\u00ebjtat arsye, p\u00ebrve\u00e7 natyr\u00ebs s\u00eb operacioneve \u2013 lloj i p\u00ebrzier (p.sh., server skedar\u00ebsh).<\/p>\n<p><\/p>\n<p>Shumica e prodhuesve t\u00eb SAN p\u00ebrdorin n\u00eb produktet e tyre SSD cache vet\u00ebm p\u00ebr operacionet e leximit. Dallimi themelor <noindex><a rel=\"nofollow\" href=\"http:\/\/www.qsan.su\/\">QSAN <\/a><\/noindex>nga ata \u00ebsht\u00eb mund\u00ebsia e p\u00ebrdorimit t\u00eb caches gjithashtu dhe p\u00ebr shkrim. P\u00ebr aktivizimin e funksionalitetit SSD caching n\u00eb SAN QSAN, k\u00ebrkohet blerja e nj\u00eb licenc\u00eb t\u00eb ve\u00e7ant\u00eb (e cila ofrohet n\u00eb form\u00eb elektronike).<\/p>\n<p><\/p>\n<p>SSD cache n\u00eb XCubeSAN \u00ebsht\u00eb fizikisht e realizuar si grupe t\u00eb ve\u00e7anta SSD cache. N\u00eb sistem mund t\u00eb ket\u00eb deri n\u00eb kat\u00ebr. \u00c7do grup, natyrisht, p\u00ebrdor setin e vet t\u00eb SSD. Dhe tashm\u00eb n\u00eb pron\u00ebsit\u00eb e diskut virtual ne p\u00ebrcaktojm\u00eb, n\u00ebse do t\u00eb p\u00ebrdor\u00eb grupin e caches dhe cili dometh\u00ebn\u00eb. Aktivizimi dhe \u00e7aktivizimi i p\u00ebrdorimit t\u00eb caches p\u00ebr volumet mund t\u00eb kryhet n\u00eb m\u00ebnyr\u00eb online pa nd\u00ebrprer\u00eb hyrje\/dali. Gjithashtu n\u00eb \u201cnxeht\u00eb\u201d mund t\u00eb shtohen SSD n\u00eb grup dhe t\u00eb hiqen prej tij. Kur krijohet grupi i SSD cache \u00ebsht\u00eb e nevojshme t\u00eb zgjidhet n\u00eb cilin mod do t\u00eb operej\u00eb: vet\u00ebm lexim ose lexim + shkrim. Kjo p\u00ebrcakton organizimin fizik t\u00eb tij. Nd\u00ebrsa mund t\u00eb ket\u00eb disa grupe caches, funksionaliteti i tyre mund t\u00eb jet\u00eb i ndrysh\u00ebm (pra, n\u00eb sistem mund t\u00eb ket\u00eb nj\u00ebkoh\u00ebsisht grupe caches p\u00ebr lexim dhe p\u00ebr lexim + shkrim).<\/p>\n<p><\/p>\n<p>N\u00eb rastin e p\u00ebrdorimit t\u00eb grupit t\u00eb caches vet\u00ebm p\u00ebr lexim, ai mund t\u00eb p\u00ebrb\u00ebhet nga 1-8 SSD. Disk\u00ebt nuk duhet t\u00eb jen\u00eb domosdoshm\u00ebrisht t\u00eb nj\u00ebjt\u00eb n\u00eb kapacitet dhe nga i nj\u00ebjti prodhues, pasi ato bashkohen n\u00eb struktur\u00ebn NRAID+. T\u00eb gjitha SSD n\u00eb grup p\u00ebrdoren s\u00eb bashku. Sistemi p\u00ebrpiqet t\u00eb ndajn\u00eb k\u00ebrkesat e ardhshme midis t\u00eb gjitha SSD p\u00ebr t\u00eb arritur performanc\u00eb maksimale. N\u00eb rastin e d\u00ebshtimit t\u00eb nj\u00ebrit prej SSD, asgj\u00eb e keqe nuk do t\u00eb ndodh\u00eb: sepse cache p\u00ebrmban vet\u00ebm nj\u00eb kopje t\u00eb t\u00eb dh\u00ebnave q\u00eb ruhen n\u00eb grupin e hard disk\u00ebve. Thjesht kapaciteti i SSD cache do t\u00eb zvog\u00eblohet (ose do t\u00eb b\u00ebhet zero n\u00eb rastin e p\u00ebrdorimit t\u00eb cache-t fillestar t\u00eb SSD nga nj\u00eb ruajt\u00ebs).<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/1e592445ff41335c844e0a47b2e664c3.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>N\u00ebse cache p\u00ebrdoret p\u00ebr operacione lexim + shkrim, at\u00ebher\u00eb numri i SSD n\u00eb grup duhet t\u00eb jet\u00eb i barabart\u00eb me dy, pasi p\u00ebrmbajtja pasqyrohet n\u00eb \u00e7iftin e ruajt\u00ebsve (p\u00ebrdoret struktura NRAID 1+). Dublimi i caches \u00ebsht\u00eb i nevojsh\u00ebm p\u00ebr shkak se n\u00eb t\u00eb mund t\u00eb p\u00ebrmbahen t\u00eb dh\u00ebna q\u00eb ende nuk jan\u00eb shkruar n\u00eb hard disk\u00eb. Dhe n\u00eb k\u00ebt\u00eb rast, d\u00ebshtimi i nj\u00eb SSD nga grupi i caches do t\u00eb \u00e7onte n\u00eb humbjen e informacionit. N\u00eb rastin e NRAID 1+, d\u00ebshtimi i SSD do t\u00eb thot\u00eb thjesht kalimin e caches n\u00eb gjendjen e pun\u00ebs \u201cvet\u00ebm p\u00ebr lexim\u201d me shp\u00ebrndarjen e t\u00eb dh\u00ebnave t\u00eb pa shkruara n\u00eb grupin e hard disk\u00ebve. Pas z\u00ebvend\u00ebsimit t\u00eb SSD t\u00eb prishur, cache do t\u00eb kthehet n\u00eb m\u00ebnyr\u00ebn e tij fillestare t\u00eb pun\u00ebs. P\u00ebr m\u00eb tep\u00ebr, p\u00ebr siguri m\u00eb t\u00eb madhe t\u00eb caches, t\u00eb punoj\u00eb n\u00eb lexim + shkrim, mund t\u00eb caktohet nj\u00eb rezerv\u00eb e nxeht\u00eb e dedikuar.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/61c6ba4b29ab31c3ded112b12f8103ce.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Kur p\u00ebrdoret funksioni i SSD caching n\u00eb XCubeSAN ka disa k\u00ebrkesa p\u00ebr kapacitetin e memories s\u00eb kontrollor\u00ebve t\u00eb SAN: sa m\u00eb shum\u00eb memorie sistemike, aq m\u00eb i madh do t\u00eb jet\u00eb kapaciteti i grupit t\u00eb caches q\u00eb do t\u00eb jet\u00eb n\u00eb dispozicion.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/40da0dba6094c55adaa54b8d9cbc1bcd.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Ndryshe nga shumica e prodhuesve t\u00eb SDD, t\u00eb cil\u00ebt ofrojn\u00eb vet\u00ebm opsionin e aktivizimit\/festimit t\u00eb SSD cache, QSAN ofron mund\u00ebsi m\u00eb t\u00eb shumta. N\u00eb ve\u00e7anti, mund t\u00eb zgjidhni modin e pun\u00ebs s\u00eb caches n\u00eb var\u00ebsi t\u00eb natyr\u00ebs s\u00eb ngarkes\u00ebs. Ka tre shabllona t\u00eb paracaktuar, t\u00eb cil\u00ebt jan\u00eb m\u00eb af\u00ebr funksionimit p\u00ebrkat\u00ebs t\u00eb sh\u00ebrbimeve: baza e t\u00eb dh\u00ebnave, sistemi i skedar\u00ebve, sh\u00ebrbimi web. P\u00ebrve\u00e7 k\u00ebsaj, administrator\u00ebt mund t\u00eb krijojn\u00eb profilin e tyre t\u00eb personalizuar, duke caktuar vlerat e k\u00ebrkuara t\u00eb parametrave: <\/p>\n<p><\/p>\n<ul>\n<li>Madh\u00ebsia e bllokut (Cache Block Size) - 1\/2\/4 MB<\/li>\n<li>Numri i k\u00ebrkesave p\u00ebr lexim t\u00eb bllokut, q\u00eb duhet t\u00eb kopjohet n\u00eb cache (Populate-on-Read Threshold) - 1..4<\/li>\n<li>Numri i k\u00ebrkesave p\u00ebr shkruan bllokun, q\u00eb duhet t\u00eb kopjohet n\u00eb cache (Populate-on-Write Threshold) - 0..4<\/li>\n<\/ul>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/b584e87c4b067ac06a4b78063007f31f.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Profillet mund t\u00eb ndryshohen \"n\u00eb flak\u00eb\", por, sigurisht, me zbrazjen e p\u00ebrmbajtjes s\u00eb caches dhe \"ngrohjen\" e tij t\u00eb re.<\/p>\n<p><\/p>\n<p>Duke shqyrtuar parimin e funksionimit t\u00eb SSD cache, mund t\u00eb p\u00ebrfshihen operacionet kryesore gjat\u00eb pun\u00ebs me t\u00eb:<\/p>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"#1\">Leximi i t\u00eb dh\u00ebnave, kur ato nuk jan\u00eb n\u00eb cache;<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"#2\">Leximi i t\u00eb dh\u00ebnave, kur ato jan\u00eb n\u00eb cache;<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"#3\">Shkrimi i t\u00eb dh\u00ebnave duke p\u00ebrdorur cache p\u00ebr lexim;<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"#4\">Shkrimi i t\u00eb dh\u00ebnave duke p\u00ebrdorur cache p\u00ebr lexim + shkrim.<\/a><\/noindex><\/li>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"1\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/c9f70934f1d9bed5ad60c716bcd3ed30.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Leximi i t\u00eb dh\u00ebnave, kur ato nuk jan\u00eb n\u00eb cache<\/i><\/p>\n<p><\/p>\n<ol>\n<li>K\u00ebrkesa nga hosti arrin n\u00eb kontrollues;<\/li>\n<li>Pasi t\u00eb dh\u00ebnat e k\u00ebrkuara nuk jan\u00eb n\u00eb SSD cache, ato lexohen nga disk\u00ebt e fort\u00eb;<\/li>\n<li>T\u00eb dh\u00ebnat e lexuara d\u00ebrgohen n\u00eb host. N\u00eb t\u00eb nj\u00ebjt\u00ebn koh\u00eb, b\u00ebhet kontrolli n\u00ebse k\u00ebto blloke jan\u00eb \"t\u00eb nxehta\";<\/li>\n<li>Nese po, ato kopjohen n\u00eb SSD cache p\u00ebr p\u00ebrdorim t\u00eb ardhsh\u00ebm.<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"2\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/9eac4b4cf003fb310101b3981dfed177.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Leximi i t\u00eb dh\u00ebnave, kur ato jan\u00eb n\u00eb cache<\/i><\/p>\n<p><\/p>\n<ol>\n<li>K\u00ebrkesa nga hosti arrin n\u00eb kontrollues;<\/li>\n<li>Pasi t\u00eb dh\u00ebnat e k\u00ebrkuara jan\u00eb n\u00eb SSD cache, ato lexohen prej andej;<\/li>\n<li>T\u00eb dh\u00ebnat e lexuara d\u00ebrgohen n\u00eb host.<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"3\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/ae1f52f5882f19916f0b49b0619dae41.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Shkrimi i t\u00eb dh\u00ebnave duke p\u00ebrdorur cache p\u00ebr lexim <\/i><\/p>\n<p><\/p>\n<ol>\n<li>K\u00ebrkesa p\u00ebr shkrim nga hosti arrin n\u00eb kontrollues;<\/li>\n<li>T\u00eb dh\u00ebnat shkruhen n\u00eb disk\u00ebt e fort\u00eb;<\/li>\n<li>Hosti merr nj\u00eb p\u00ebrgjigje p\u00ebr shkrimin e suksessh\u00ebm;<\/li>\n<li>N\u00eb t\u00eb nj\u00ebjt\u00ebn koh\u00eb, kontrollohet n\u00ebse blloku \u00ebsht\u00eb \"i nxeht\u00eb\" (krahasohet parametrin Populate-on-Write Threshold). N\u00ebse po, ai kopjohet n\u00eb SSD cache p\u00ebr p\u00ebrdorim t\u00eb m\u00ebvonsh\u00ebm.<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"4\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/b69debdc836e3c1d93f64aa8724dd322.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Shkrimi i t\u00eb dh\u00ebnave duke p\u00ebrdorur cache p\u00ebr lexim + shkrim<\/i><\/p>\n<p><\/p>\n<ol>\n<li>K\u00ebrkesa p\u00ebr shkrim nga hosti arrin n\u00eb kontrollues;<\/li>\n<li>T\u00eb dh\u00ebnat shkruhen n\u00eb SSD cache;<\/li>\n<li>Hosti merr nj\u00eb p\u00ebrgjigje p\u00ebr shkrimin e suksessh\u00ebm;<\/li>\n<li>T\u00eb dh\u00ebnat nga SSD cache jepen n\u00eb sfond n\u00eb disk\u00ebt e fort\u00eb;<\/li>\n<\/ol>\n<h2>Kontrolli n\u00eb veprim <\/h2>\n<p>\n<b class=\"spoiler_title\">Nj\u00ebsia e testimit<\/b><\/p>\n<p>2 server\u00eb (CPU: 2 x Xeon E5-2620v3 2.4Hz \/ RAM: 32GB) t\u00eb lidhur me dy porte p\u00ebrmes Fibre Channel 16G drejtp\u00ebrdrejt n\u00eb SDD XCubeSAN XS5224D (16GB RAM\/kontrollues).<\/p>\n<p><\/p>\n<p>P\u00ebrdor\u00ebn 16 x Seagate Constellation ES, ST500NM0001, 500GB, SAS 6Gb\/s, t\u00eb kombinuara n\u00eb RAID5 (15+1), p\u00ebr grumbullin e t\u00eb dh\u00ebnave dhe 8 x HGST Ultrastar SSD800MH.B, HUSMH8010BSS200, 100GB, SAS 12Gb\/s si cache.<\/p>\n<p><\/p>\n<p>I jan\u00eb krijuar 2 v\u00ebllime: nj\u00eb p\u00ebr secilin server. <\/p>\n<h3>Testi 1. SSD cache vet\u00ebm p\u00ebr lexim me 1-8 SSD<\/h3>\n<p><\/p>\n<p><b>SSD Cache<\/b><\/p>\n<p><\/p>\n<ul>\n<li>Lloji I\/O: Personalizim<\/li>\n<li>Madh\u00ebsia e Bllokut t\u00eb Cache: 4MB<\/li>\n<li><b>Populate-on-read Threshold: 1<\/b><\/li>\n<li>Populate-on-write Threshold: 0<\/li>\n<\/ul>\n<p><b>Modelo I\/O<\/b> <\/p>\n<p><\/p>\n<ul>\n<li>Mjeti: IOmeter V1.1.0<\/li>\n<li>Pun\u00ebtor\u00ebt: 1<\/li>\n<li>Numri i pritjes (Queue Depth): 128<\/li>\n<li><b>Specifikimet e qasjeve: 4KB, 100% Lexim, 100% Rast\u00ebsor<\/b><\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/6d9f4d3912d066662067fba52eb0e938.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/665aa2f35d5d78bdb4a128eaea55faf2.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Teorikisht, sa m\u00eb shum\u00eb SSD t\u00eb ket\u00eb n\u00eb grupin e caches, aq m\u00eb e lart\u00eb \u00ebsht\u00eb performanca. N\u00eb praktik\u00eb, ky fakt u konfirmua. E vetmja, rritja e dukshme e numrit t\u00eb SSD-n\u00eb nj\u00eb num\u00ebr t\u00eb vog\u00ebl t\u00eb v\u00ebllimeve nuk \u00e7on n\u00eb nj\u00eb efekt eksploziv. <\/p>\n<p><\/p>\n<h3>Testi 2. SSD cache n\u00eb modin lexim + shkrim me 2-8 SSD<\/h3>\n<p><\/p>\n<p><b>SSD Cache<\/b><\/p>\n<p><\/p>\n<ul>\n<li> Lloji I\/O: Personalizim<\/li>\n<li>Madh\u00ebsia e Bllokut t\u00eb Cache: 4MB<\/li>\n<li>Populate-on-read Threshold: 1<\/li>\n<li><b>Populate-on-write Threshold: 1 <\/b><\/li>\n<\/ul>\n<p><b>Modelo I\/O<\/b> <\/p>\n<p><\/p>\n<ul>\n<li>Mjeti: IOmeter V1.1.0<\/li>\n<li>Pun\u00ebtor\u00ebt: 1<\/li>\n<li>Numri i pritjes (Queue Depth): 128<\/li>\n<li><b>Specifikimet e qasjeve: 4KB, 100% Shkrim, 100% Rast\u00ebsor <\/b><\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/6177fe7ef2c74045d760ba94598acb34.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/2e1f749b827d43dd3fa8dcd33243bd9e.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>T\u00eb nj\u00ebjtat rezultate: rritje eksplozive e performanc\u00ebs dhe zgjerimi me rritjen e numrit t\u00eb SSD.<\/p>\n<p><\/p>\n<p>N\u00eb t\u00eb dy testet, volumi i t\u00eb dh\u00ebnave ishte m\u00eb i vog\u00ebl se volumi i p\u00ebrgjithsh\u00ebm i caches. Prandaj, n\u00eb koh\u00ebn, t\u00eb gjitha blloqet u kopjuan n\u00eb cache. Dhe puna tashm\u00eb, n\u00eb esenc\u00eb, u krye me SSD, duke mos prekur pothuajse disk\u00ebt e fort\u00eb. Q\u00ebllimi i k\u00ebtyre testimeve ishte t\u00eb ilustronte qartazi efikasitetin e ngrohjes s\u00eb caches dhe rritjen e performanc\u00ebs n\u00eb var\u00ebsi t\u00eb numrit t\u00eb SSD.<\/p>\n<p><\/p>\n<p>Tani kthehemi n\u00eb tok\u00eb dhe kontrollojm\u00eb nj\u00eb situat\u00eb m\u00eb realiste, kur volumi i t\u00eb dh\u00ebnave \u00ebsht\u00eb m\u00eb i madh se madh\u00ebsia e caches. P\u00ebr t\u00eb realizuar testin brenda nj\u00eb kohe t\u00eb arsyeshme (periudha e \"ngrohjes\" s\u00eb caches rritet shum\u00eb me rritjen e madh\u00ebsis\u00eb s\u00eb v\u00ebllimit), do t\u00eb kufizohemi n\u00eb nj\u00eb madh\u00ebsi v\u00ebllimi prej 120GB. <\/p>\n<p><\/p>\n<h3>Testi 3. Emulimi i pun\u00ebs s\u00eb baz\u00ebs s\u00eb t\u00eb dh\u00ebnave <\/h3>\n<p><\/p>\n<p><b>SSD Cache<\/b><\/p>\n<p><\/p>\n<ul>\n<li> <b>Lloji I\/O: Baza e t\u00eb dh\u00ebnave<\/b><\/li>\n<li>Madh\u00ebsia e Bllokut t\u00eb Cache: 1MB<\/li>\n<li>Populate-on-read Threshold: 2<\/li>\n<li>Populate-on-write Threshold: 1 <\/li>\n<\/ul>\n<p><b>Modelo I\/O<\/b> <\/p>\n<p><\/p>\n<ul>\n<li>Mjeti: IOmeter V1.1.0<\/li>\n<li>Pun\u00ebtor\u00ebt: 1<\/li>\n<li>Numri i pritjes (Queue Depth): 128<\/li>\n<li><b>Specifikimet e qasjeve: 8KB, 67% Lexim, 100% Rast\u00ebsor<\/b><\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Implementimi i SSD caching n\u00eb ruajt\u00ebsin QSAN XCubeSAN\" src=\"\/wp-content\/uploads\/2019\/04\/949b9fc604cf3a932ebf308d19fc9ff1.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h2>Verdikti <\/h2>\n<p><\/p>\n<blockquote><p>Si nj\u00eb p\u00ebrfundim t\u00eb duksh\u00ebm, sigurisht, sugjerohet nj\u00eb efikasitet i mir\u00eb i p\u00ebrdorimit t\u00eb SSD caches p\u00ebr t\u00eb rritur performanc\u00ebn e \u00e7do SDD. P\u00ebrshtatur p\u00ebr <noindex><a rel=\"nofollow\" href=\"http:\/\/www.qsan.su\/goods\/sistemyi-xraneniya-dannyix\/\">QSAN XCubeSAN<\/a><\/noindex> kjo th\u00ebnie zbatohet plot\u00ebsisht: funksioni i SSD caching \u00ebsht\u00eb implementuar shk\u00eblqyesh\u00ebm. Kjo p\u00ebrfshin mb\u00ebshtetje p\u00ebr modulet e lexim dhe lexim + shkrim, si dhe konfigurim fleksib\u00ebl p\u00ebr \u00e7do skenar p\u00ebrdorimi, si dhe rendimentin p\u00ebrfundimtar t\u00eb sistemit n\u00eb t\u00ebr\u00ebsi. Prandaj, p\u00ebr nj\u00eb \u00e7mim t\u00eb arsyesh\u00ebm (\u00e7mimi i licenc\u00ebs \u00ebsht\u00eb n\u00eb p\u00ebrpjes\u00ebtim me \u00e7mimin e 1-2 SSD) mund t\u00eb rritet ndjesh\u00ebm performanca e p\u00ebrgjithshme.<\/p><\/blockquote>\n<p>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/skilline\/blog\/432366\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0422\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438, \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 SSD \u0438 \u0448\u0438\u0440\u043e\u043a\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0435 \u0432 \u0421\u0425\u0414, \u0443\u0436\u0435 \u0434\u0430\u0432\u043d\u043e \u0438\u0437\u043e\u0431\u0440\u0435\u0442\u0435\u043d\u044b. \u041f\u0440\u0435\u0436\u0434\u0435 \u0432\u0441\u0435\u0433\u043e \u2013 \u044d\u0442\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 SSD \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0430 \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f, \u0447\u0442\u043e \u043d\u0430 100% \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e, \u043d\u043e \u0434\u043e\u0440\u043e\u0433\u043e. \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u0432 \u0445\u043e\u0434 \u0438\u0434\u0443\u0442 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u0442\u0438\u0440\u0438\u043d\u0433\u0430 \u0438 \u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f, \u0433\u0434\u0435 SSD \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442\u0441\u044f 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