{"id":145,"date":"2018-02-13T17:31:03","date_gmt":"2018-02-13T16:31:03","guid":{"rendered":"https:\/\/virtualguru.cz\/?p=145"},"modified":"2018-03-16T11:48:45","modified_gmt":"2018-03-16T10:48:45","slug":"orientacni-vypocet-kapacity-vsan","status":"publish","type":"post","link":"https:\/\/virtualguru.cz\/en\/2018\/02\/13\/orientacni-vypocet-kapacity-vsan\/","title":{"rendered":"Orienta\u010dn\u00ed v\u00fdpo\u010det kapacity vSAN"},"content":{"rendered":"<p>Software-defined storage, neboli SDS je jeden za z\u00e1kladn\u00edch pil\u00ed\u0159\u016f &#8222;software-defined data center&#8220; SDDC. Je to aktu\u00e1ln\u011b uplat\u0148ovan\u00fd trend a ur\u010dit\u011b velice sv\u011b\u017e\u00ed z\u00e1van nov\u00fdch technologi\u00ed na sc\u00e9n\u011b diskov\u00fdch pol\u00ed. Softwarov\u011b definovan\u00e1 diskov\u00e1 pole maj\u00ed ur\u010dit\u011b spoustu v\u00fdhod a v mnoha p\u0159\u00edpadech jako zcela nov\u011b vznikaj\u00edc\u00ed produkty netrp\u00ed &#8222;d\u011btsk\u00fdmi nemocemi&#8220; a limity fyzick\u00e9ho sv\u011bta. Nicm\u00e9n\u011b, rozd\u00edly v designu takov\u00e9 SDS, a tady se budeme bavit o vSAN od VMware, jsou zna\u010dn\u011b odli\u0161n\u00e9 od &#8222;klasick\u00fdch&#8220; sc\u00e9n\u00e1\u0159\u016f diskov\u00fdch pol\u00ed.<\/p>\n<p>Jedn\u00edm ze z\u00e1sadn\u00edch rozd\u00edl\u016f vSAN od klasick\u00fdch struktur je absence fyzick\u00fdch RAID\u016f, druh\u00fdm pak \u0161k\u00e1lovatelnost v horizont\u00e1ln\u00ed rovin\u011b neboli &#8222;scale-out&#8220; a v neposledn\u00ed \u0159ad\u011b takzvan\u00fd &#8222;storage policy based management&#8220; SPBM. Rozd\u00edl\u016f je samoz\u0159ejm\u011b mnohem v\u00edce, nicm\u00e9n\u011b tyto maj\u00ed p\u0159\u00edm\u00fd vliv na kapacitu. Pro mnoho spr\u00e1vc\u016f nen\u00ed pak jednoduch\u00e9 p\u0159edstavit si, kolik RAW kapacity pot\u0159ebuj\u00ed a kolik vlastn\u011b z\u016fstane \u010dist\u00e9 vyu\u017eiteln\u00e9 kapacity.<\/p>\n<p>Kalkula\u010dek pro v\u00fdpo\u010det pot\u0159ebn\u00fdch prost\u0159edk\u016f je na internetu spoustu, ty nejlep\u0161\u00ed jsou p\u0159\u00edmo z d\u00edlny VMware, <a href=\"https:\/\/vsantco.vmware.com\">vsantco.vmware.com<\/a> nebo <a href=\"https:\/\/vsansizer.vmware.com\">vsansizer.vmware.com<\/a>. Tyto n\u00e1stroje jsou v\u0161ak pro prvn\u00ed orienta\u010dn\u00ed n\u00e1vrh zbyte\u010dn\u011b komplexn\u00ed, mnoh\u00fd spr\u00e1vce se tak v nich lehce ztrat\u00ed.<\/p>\n<p>Pro pot\u0159eby rychl\u00e9ho a jednoduch\u00e9ho v\u00fdpo\u010dtu jsem vytvo\u0159il malou excelovou kalkula\u010dku, kde zad\u00e1n\u00edm n\u011bkolika m\u00e1lo parametr\u016f dostanete orienta\u010dn\u00ed \u010distou kapacitu.<\/p>\n<p>Pot\u0159ebn\u00e9 parametry:<\/p>\n<ul>\n<li>kolik n\u00f3d\u016f (server\u016f) sou\u010dasn\u011b m\u016f\u017ee b\u00fdt nedostupn\u00fdch (porucha, \u00fadr\u017eba, atd&#8230;)<\/li>\n<li>jak\u00e1 bude uplat\u0148ov\u00e1na politika RAID<\/li>\n<li>po\u017eadovan\u00fd po\u010det n\u00f3d\u016f, minim\u00e1ln\u00ed po\u010det je z\u00e1visl\u00fd na maxim\u00e1ln\u00ed toleranci v\u00fdpadku a RAID politice<\/li>\n<li>typ disk\u016f, vyberete si ze seznamu, ten je napln\u011bn aktu\u00e1ln\u011b nab\u00edzen\u00fdmi disky do HPE server\u016f<\/li>\n<li>zvol\u00edte si po\u010det disk\u016f per n\u00f3d<\/li>\n<li>deduplika\u010dn\u00ed pom\u011br, jen t\u011b\u017eko odhadnuteln\u00fd p\u0159i n\u00e1vrhu, je z\u00e1visl\u00fd na typu dat, polo\u017eka zde je pouze pro p\u0159edstavu, jak se m\u016f\u017ee kapacita m\u011bnit<\/li>\n<\/ul>\n<div class=\"ead-preview\"><div class=\"ead-document\" style=\"position: relative;\"><div class=\"ead-iframe-wrapper\"><iframe src=\"\/\/docs.google.com\/viewer?url=https%3A%2F%2Fvirtualguru.cz%2Fwp-content%2Fuploads%2F2018%2F02%2FvSAN_calc.xlsx&amp;embedded=true&amp;hl=en\" title=\"Embedded Document\" class=\"ead-iframe\" style=\"width: 100%;height: 80%;border: none;min-height: 500px;visibility: hidden;\"><\/iframe><\/div>\t\t\t<div class=\"ead-document-loading\" style=\"width:100%;height:100%;position:absolute;left:0;top:0;z-index:10;\">\n\t\t\t\t<div class=\"ead-loading-wrap\">\n\t\t\t\t\t<div class=\"ead-loading-main\">\n\t\t\t\t\t\t<div class=\"ead-loading\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/virtualguru.cz\/wp-content\/plugins\/embed-any-document\/images\/loading.svg\" width=\"55\" height=\"55\" alt=\"Loader\">\n\t\t\t\t\t\t\t<span>Loading...<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"ead-loading-foot\">\n\t\t\t\t\t\t<div class=\"ead-loading-foot-title\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/virtualguru.cz\/wp-content\/plugins\/embed-any-document\/images\/EAD-logo.svg\" alt=\"EAD Logo\" width=\"36\" height=\"23\"\/>\n\t\t\t\t\t\t\t<span>Taking too long?<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<p>\n\t\t\t\t\t\t\t<div class=\"ead-document-btn ead-reload-btn\" role=\"button\">\n\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/virtualguru.cz\/wp-content\/plugins\/embed-any-document\/images\/reload.svg\" alt=\"Reload\" width=\"12\" height=\"12\"\/> Reload document\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<span>|<\/span>\n\t\t\t\t\t\t\t<a href=\"https:\/\/docs.google.com\/viewer?url=https%3A%2F%2Fvirtualguru.cz%2Fwp-content%2Fuploads%2F2018%2F02%2FvSAN_calc.xlsx&#038;hl=en\" class=\"ead-document-btn\" target=\"_blank\">\n\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/virtualguru.cz\/wp-content\/plugins\/embed-any-document\/images\/open.svg\" alt=\"Open\" width=\"12\" height=\"12\"\/> Open in new tab\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div><p class=\"embed_download\"><a href=\"https:\/\/virtualguru.cz\/wp-content\/uploads\/2018\/02\/vSAN_calc.xlsx\" download>St\u00e1hnout [13.73 KB] <\/a><\/p><\/div>","protected":false},"excerpt":{"rendered":"<p>Software-defined storage, neboli SDS je jeden za z\u00e1kladn\u00edch pil\u00ed\u0159\u016f &#8222;software-defined data center&#8220; SDDC. Je to aktu\u00e1ln\u011b uplat\u0148ovan\u00fd trend a ur\u010dit\u011b velice sv\u011b\u017e\u00ed z\u00e1van nov\u00fdch technologi\u00ed&#8230;<\/p>\n<div class=\"more-link-wrapper\"><a class=\"more-link\" href=\"https:\/\/virtualguru.cz\/en\/2018\/02\/13\/orientacni-vypocet-kapacity-vsan\/\">Continue Reading<span class=\"screen-reader-text\">Orienta\u010dn\u00ed v\u00fdpo\u010det kapacity vSAN<\/span> <i class=\"fas fa-angle-right\"><\/i><\/a><\/div>","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"iawp_total_views":16,"footnotes":""},"categories":[5],"tags":[14,13],"class_list":["post-145","post","type-post","status-publish","format-standard","hentry","category-vsan","tag-sddc","tag-vsan","entry"],"_links":{"self":[{"href":"https:\/\/virtualguru.cz\/en\/wp-json\/wp\/v2\/posts\/145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/virtualguru.cz\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/virtualguru.cz\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/virtualguru.cz\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/virtualguru.cz\/en\/wp-json\/wp\/v2\/comments?post=145"}],"version-history":[{"count":13,"href":"https:\/\/virtualguru.cz\/en\/wp-json\/wp\/v2\/posts\/145\/revisions"}],"predecessor-version":[{"id":163,"href":"https:\/\/virtualguru.cz\/en\/wp-json\/wp\/v2\/posts\/145\/revisions\/163"}],"wp:attachment":[{"href":"https:\/\/virtualguru.cz\/en\/wp-json\/wp\/v2\/media?parent=145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/virtualguru.cz\/en\/wp-json\/wp\/v2\/categories?post=145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/virtualguru.cz\/en\/wp-json\/wp\/v2\/tags?post=145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}