{"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\/hu\/blog\/administrirovanie\/realizatsiya-ssd-keshirovaniya-v-shd-qsan-xcubesan","title":{"rendered":"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A teljes\u00edtm\u00e9nyn\u00f6vel\u0151 technol\u00f3gi\u00e1k, amelyek SSD-k haszn\u00e1lat\u00e1n alapulnak \u00e9s m\u00e1r r\u00e9g\u00f3ta alkalmazz\u00e1k \u0151ket a t\u00e1rol\u00f3rendszerekben, m\u00e1r r\u00e9g\u00f3ta l\u00e9teznek. El\u0151sz\u00f6r is, az SSD-k t\u00e1rol\u00f3helyk\u00e9nt val\u00f3 alkalmaz\u00e1sa 100%-osan hat\u00e9kony, de dr\u00e1ga. Ez\u00e9rt alkalmazz\u00e1k a tiering \u00e9s a cache technol\u00f3gi\u00e1kat, ahol az SSD-ket csak a legkeresettebb (\u201eforr\u00f3\u201d) adatokhoz haszn\u00e1lj\u00e1k. A tiering j\u00f3 megold\u00e1s a \u201eforr\u00f3\u201d adatok hossz\u00fa t\u00e1v\u00fa (napok-hetek) haszn\u00e1lat\u00e1ra. A cache viszont r\u00f6vid t\u00e1v\u00fa (percek-\u00f3r\u00e1k) felhaszn\u00e1l\u00e1sra alkalmas. Mindk\u00e9t megold\u00e1s megval\u00f3s\u00edt\u00e1sra ker\u00fclt a t\u00e1rol\u00f3rendszerekben. <noindex><a rel=\"nofollow\" href=\"http:\/\/www.qsan.su\/goods\/sistemyi-xraneniya-dannyix\/\">QSAN XCubeSAN<\/a><\/noindex>. Ebben a cikkben a m\u00e1sodik algoritmus megval\u00f3s\u00edt\u00e1s\u00e1t fogjuk vizsg\u00e1lni \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=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" 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>Az SSD caching l\u00e9nyege, hogy SSD-t haszn\u00e1lnak k\u00f6zbens\u0151 cache-k\u00e9nt a merevlemezek \u00e9s a vez\u00e9rl\u0151 mem\u00f3ri\u00e1ja k\u00f6z\u00f6tt. Az SSD teljes\u00edtm\u00e9nye term\u00e9szetesen alacsonyabb, mint a vez\u00e9rl\u0151 saj\u00e1t cache-\u00e1nak teljes\u00edtm\u00e9nye, de a kapacit\u00e1sa viszont sokkal nagyobb. \u00cdgy egyfajta kompromisszumi megold\u00e1s sz\u00fcletik a sebess\u00e9g \u00e9s a kapacit\u00e1s k\u00f6z\u00f6tt.<\/p>\n<p><\/p>\n<p><b>Az SSD cache olvas\u00e1si haszn\u00e1lat\u00e1nak indik\u00e1ci\u00f3i:<\/b><\/p>\n<p><\/p>\n<ul>\n<li>A l\u00e9nyeges olvas\u00e1si m\u0171veletek t\u00fals\u00falya az \u00edr\u00e1si m\u0171veletekkel szemben (leggyakrabban adatb\u00e1zisok \u00e9s webalkalmaz\u00e1sok eset\u00e9ben);<\/li>\n<li>A merevlemezes t\u00f6mb teljes\u00edtm\u00e9ny\u00e9vel kapcsolatos sz\u0171k keresztmetszet jelenl\u00e9te;<\/li>\n<li>A keresett adatok mennyis\u00e9ge kisebb, mint az SSD cache kapacit\u00e1sa.<\/li>\n<\/ul>\n<p><\/p>\n<p>Az SSD cache olvas\u00e1s+\u00edr\u00e1s haszn\u00e1lat\u00e1nak indik\u00e1ci\u00f3i ugyanezek, a m\u0171veletek t\u00edpusa kiv\u00e9tel\u00e9vel \u2013 vegyes t\u00edpus (p\u00e9ld\u00e1ul f\u00e1jlszerver).<\/p>\n<p><\/p>\n<p>A t\u00e1rol\u00f3rendszerek t\u00f6bbs\u00e9ge az SSD cache-t csak olvas\u00e1si m\u0171veletekhez haszn\u00e1lja. A l\u00e9nyeges k\u00fcl\u00f6nbs\u00e9g <noindex><a rel=\"nofollow\" href=\"http:\/\/www.qsan.su\/\">QSAN <\/a><\/noindex>k\u00f6zt\u00fck az, hogy a cache-t \u00edr\u00e1sra is lehet haszn\u00e1lni. Az SSD caching funkci\u00f3 aktiv\u00e1l\u00e1s\u00e1hoz a QSAN t\u00e1rol\u00f3rendszerben k\u00fcl\u00f6n enged\u00e9ly megv\u00e1s\u00e1rl\u00e1sa sz\u00fcks\u00e9ges (elektronikus form\u00e1ban ker\u00fcl forgalomba).<\/p>\n<p><\/p>\n<p>Az SSD gyors\u00edt\u00f3t\u00e1r az XCubeSAN rendszerben fizikailag k\u00fcl\u00f6n SSD gyors\u00edt\u00f3t\u00e1r medenc\u00e9k form\u00e1j\u00e1ban val\u00f3sul meg. A rendszerben legfeljebb n\u00e9gy ilyen medence lehet. Minden medence term\u00e9szetesen a saj\u00e1t SSD k\u00e9szlet\u00e9t haszn\u00e1lja. A virtu\u00e1lis lemez tulajdons\u00e1gaiban meghat\u00e1rozzuk, hogy az haszn\u00e1lni fogja-e a gyors\u00edt\u00f3t\u00e1r medenc\u00e9t, \u00e9s ha igen, melyiket. A k\u00f6tetek gyors\u00edt\u00f3t\u00e1r haszn\u00e1lat\u00e1nak enged\u00e9lyez\u00e9se \u00e9s letilt\u00e1sa online m\u00f3dban v\u00e9gezhet\u0151 el, an\u00e9lk\u00fcl, hogy le kellene \u00e1ll\u00edtani a bemeneti\/kimeneti m\u0171veleteket. Ezenk\u00edv\u00fcl \u201eforr\u00f3\u201d cser\u00e9vel SSD-ket is adhatunk a medenc\u00e9hez, vagy elt\u00e1vol\u00edthatjuk \u0151ket onnan. Az SSD gyors\u00edt\u00f3t\u00e1r medence l\u00e9trehoz\u00e1sakor ki kell v\u00e1lasztani, hogy melyik m\u00f3dban m\u0171k\u00f6dik: csak olvas\u00e1s vagy olvas\u00e1s + \u00edr\u00e1s. Ez meghat\u00e1rozza a fizik\u00e1lis elrendez\u00e9s\u00e9t. Mivel t\u00f6bb gyors\u00edt\u00f3t\u00e1r medence is l\u00e9tezhet, ez\u00e9rt a funkci\u00f3ik elt\u00e9r\u0151ek lehetnek (teh\u00e1t a rendszerben egyidej\u0171leg lehetnek olvas\u00e1sra \u00e9s olvas\u00e1sra + \u00edr\u00e1sra sz\u00e1nt gyors\u00edt\u00f3t\u00e1r medenc\u00e9k).<\/p>\n<p><\/p>\n<p>Ha a gyors\u00edt\u00f3t\u00e1r medence csak olvas\u00e1sra szolg\u00e1l, az 1-8 SSD-b\u0151l \u00e1llhat. A meghajt\u00f3knak nem kell azonos kapacit\u00e1s\u00faaknak \u00e9s ugyanannak a gy\u00e1rt\u00f3nak lenni\u00fck, mivel az NRAID+ strukt\u00far\u00e1ba szervez\u0151dnek. Az \u00f6sszes SSD-t k\u00f6z\u00f6sen haszn\u00e1lj\u00e1k a medenc\u00e9ben. A rendszer automatikusan pr\u00f3b\u00e1lja p\u00e1rhuzamos\u00edtani a be\u00e9rkez\u0151 k\u00e9r\u00e9seket az \u00f6sszes SSD k\u00f6z\u00f6tt a maxim\u00e1lis teljes\u00edtm\u00e9ny el\u00e9r\u00e9se \u00e9rdek\u00e9ben. Ha az egyik SSD hib\u00e1sodik meg, az nem okoz komoly probl\u00e9m\u00e1t: a gyors\u00edt\u00f3t\u00e1r csup\u00e1n a merevlemezeken t\u00e1rolt adatok m\u00e1solat\u00e1t tartalmazza. Csak a hozz\u00e1f\u00e9rhet\u0151 SSD gyors\u00edt\u00f3t\u00e1r kapacit\u00e1sa cs\u00f6kken (vagy null\u00e1ra cs\u00f6kken, ha az eredeti SSD gyors\u00edt\u00f3t\u00e1rb\u00f3l egyetlen t\u00e1rol\u00f3egys\u00e9g van haszn\u00e1latban).<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/1e592445ff41335c844e0a47b2e664c3.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Ha a gyors\u00edt\u00f3t\u00e1rat olvas\u00e1s + \u00edr\u00e1s m\u0171veletekhez haszn\u00e1lj\u00e1k, akkor a medenc\u00e9ben l\u00e9v\u0151 SSD-k sz\u00e1m\u00e1nak p\u00e1rosnak kell lennie, mivel a tartalom p\u00e1rhuzamos\u00edtva van a t\u00e1rol\u00f3k p\u00e1rjai k\u00f6z\u00f6tt (NRAID 1+ strukt\u00far\u00e1t haszn\u00e1l). A gyors\u00edt\u00f3t\u00e1r duplik\u00e1l\u00e1sa sz\u00fcks\u00e9ges, mivel olyan adatokat tartalmazhat, amelyek m\u00e9g nem ker\u00fcltek r\u00f6gz\u00edt\u00e9sre a merevlemezeken. Ebben az esetben, ha egy SSD meghib\u00e1sodik a gyors\u00edt\u00f3t\u00e1r medenc\u00e9b\u0151l, az inform\u00e1ci\u00f3veszt\u00e9shez vezetne. A NRAID 1+ eset\u00e9n az SSD meghib\u00e1sod\u00e1sa egyszer\u0171en azt eredm\u00e9nyezi, hogy a gyors\u00edt\u00f3t\u00e1r \u201ecsak olvas\u00e1s\u201d-ra m\u00f3dosul, \u00e9s a nem r\u00f6gz\u00edtett adatokat vissza\u00edrja a merevlemezekre. A hib\u00e1s SSD cser\u00e9je ut\u00e1n a gyors\u00edt\u00f3t\u00e1r visszat\u00e9r az eredeti \u00fczemm\u00f3dj\u00e1ba. Egy\u00e9bk\u00e9nt a nagyobb biztons\u00e1g \u00e9rdek\u00e9ben a gyors\u00edt\u00f3t\u00e1r, amely olvas\u00e1s + \u00edr\u00e1s \u00fczemm\u00f3dban m\u0171k\u00f6dik, dedik\u00e1lt hot spare-t is kaphat.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/61c6ba4b29ab31c3ded112b12f8103ce.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Az XCubeSAN SSD gyors\u00edt\u00f3t\u00e1r funkci\u00f3j\u00e1nak haszn\u00e1lata sor\u00e1n sz\u00e1mos k\u00f6vetelm\u00e9ny \u00e1ll fenn az adatt\u00e1rol\u00f3 vez\u00e9rl\u0151k mem\u00f3ri\u00e1j\u00e1val kapcsolatban: min\u00e9l t\u00f6bb rendszermem\u00f3ria \u00e1ll rendelkez\u00e9sre, ann\u00e1l nagyobb gyors\u00edt\u00f3t\u00e1r kapacit\u00e1s \u00e9rhet\u0151 el.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/40da0dba6094c55adaa54b8d9cbc1bcd.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Ellent\u00e9tben a legt\u00f6bb adatt\u00e1rol\u00f3 gy\u00e1rt\u00f3val, akik csak be- \u00e9s kikapcsol\u00e1si lehet\u0151s\u00e9get k\u00edn\u00e1lnak az SSD gyors\u00edt\u00e1shoz, a QSAN sz\u00e9lesebb lehet\u0151s\u00e9geket biztos\u00edt. K\u00fcl\u00f6n\u00f6sen, lehet\u0151s\u00e9g van a gyors\u00edt\u00f3t\u00e1r m\u0171k\u00f6d\u00e9si m\u00f3dj\u00e1nak kiv\u00e1laszt\u00e1s\u00e1ra a terhel\u00e9s jellege alapj\u00e1n. H\u00e1rom el\u0151re be\u00e1ll\u00edtott sablon \u00e1ll rendelkez\u00e9sre, amelyek a legink\u00e1bb megfelelnek a megfelel\u0151 szolg\u00e1ltat\u00e1soknak: adatb\u00e1zis, f\u00e1jlrendszer, webszolg\u00e1ltat\u00e1s. Ezen k\u00edv\u00fcl a rendszergazda l\u00e9trehozhatja saj\u00e1t profilj\u00e1t, be\u00e1ll\u00edtva a k\u00edv\u00e1nt param\u00e9terek \u00e9rt\u00e9keit: <\/p>\n<p><\/p>\n<ul>\n<li>Blokkm\u00e9ret (Cache Block Size) \u2013 1\/2\/4 MB<\/li>\n<li>Olvas\u00e1si k\u00e9r\u00e9sek sz\u00e1ma, hogy a blokk m\u00e1sol\u00e1sra ker\u00fclj\u00f6n a gyors\u00edt\u00f3t\u00e1rba (Populate-on-Read Threshold) \u2013 1..4<\/li>\n<li>\u00cdr\u00e1si k\u00e9r\u00e9sek sz\u00e1ma, hogy a blokk m\u00e1sol\u00e1sra ker\u00fclj\u00f6n a gyors\u00edt\u00f3t\u00e1rba (Populate-on-Write Threshold) \u2013 0..4<\/li>\n<\/ul>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/b584e87c4b067ac06a4b78063007f31f.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>A profilok \u201e\u00e9l\u0151ben\u201d m\u00f3dos\u00edthat\u00f3k, de term\u00e9szetesen a gyors\u00edt\u00f3t\u00e1r tartalm\u00e1nak t\u00f6rl\u00e9s\u00e9vel \u00e9s \u00faj \u201emeleg\u00edt\u00e9s\u00e9vel\u201d j\u00e1rnak.<\/p>\n<p><\/p>\n<p>Az SSD gyors\u00edt\u00f3t\u00e1r m\u0171k\u00f6d\u00e9si elv\u00e9nek vizsg\u00e1latakor kiemelhet\u0151k az al\u00e1bbi alapvet\u0151 m\u0171veletek:<\/p>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"#1\">Adatok olvas\u00e1sa, amikor azok nincsenek a gyors\u00edt\u00f3t\u00e1rban;<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"#2\">Adatok olvas\u00e1sa, amikor azok a gyors\u00edt\u00f3t\u00e1rban vannak;<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"#3\">Adatok \u00edr\u00e1sa, ha a gyors\u00edt\u00f3t\u00e1r olvas\u00e1sra van konfigur\u00e1lva;<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"#4\">Adatok \u00edr\u00e1sa, ha a gyors\u00edt\u00f3t\u00e1r olvas\u00e1s+\u00edr\u00e1s \u00fczemm\u00f3dban m\u0171k\u00f6dik.<\/a><\/noindex><\/li>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"1\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/c9f70934f1d9bed5ad60c716bcd3ed30.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Adatok olvas\u00e1sa, amikor azok nincsenek a gyors\u00edt\u00f3t\u00e1rban<\/i><\/p>\n<p><\/p>\n<ol>\n<li>A k\u00e9r\u00e9s a gazdag\u00e9pr\u0151l a vez\u00e9rl\u0151h\u00f6z \u00e9rkezik;<\/li>\n<li>Mivel az ig\u00e9nyelt adatok nincsenek az SSD gyors\u00edt\u00f3t\u00e1rban, azok a merevlemezekr\u0151l ker\u00fclnek kiolvas\u00e1sra;<\/li>\n<li>Az olvasott adatokat a gazdag\u00e9phez k\u00fcldik. K\u00f6zben ellen\u0151rz\u00e9s folyik arr\u00f3l, hogy ezek a blokkok \u201eforr\u00f3k\u201d-e;<\/li>\n<li>Ha igen, akkor ezek m\u00e1sol\u00e1sra ker\u00fclnek az SSD gyors\u00edt\u00f3t\u00e1rba a tov\u00e1bbi felhaszn\u00e1l\u00e1s \u00e9rdek\u00e9ben.<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"2\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/9eac4b4cf003fb310101b3981dfed177.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Adatok olvas\u00e1sa, amikor azok a gyors\u00edt\u00f3t\u00e1rban vannak<\/i><\/p>\n<p><\/p>\n<ol>\n<li>A k\u00e9r\u00e9s a gazdag\u00e9pr\u0151l a vez\u00e9rl\u0151h\u00f6z \u00e9rkezik;<\/li>\n<li>Mivel a k\u00e9rt adatok az SSD gyors\u00edt\u00f3t\u00e1rban vannak, onnan ker\u00fclnek kiolvas\u00e1sra;<\/li>\n<li>Az olvasott adatokat a gazdag\u00e9phez k\u00fcldik.<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"3\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/ae1f52f5882f19916f0b49b0619dae41.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Adatok \u00edr\u00e1sa, ha a gyors\u00edt\u00f3t\u00e1r olvas\u00e1sra van konfigur\u00e1lva <\/i><\/p>\n<p><\/p>\n<ol>\n<li>Egy \u00edr\u00e1si k\u00e9r\u00e9s a gazdag\u00e9pr\u0151l a vez\u00e9rl\u0151h\u00f6z \u00e9rkezik;<\/li>\n<li>Az adatok a merevlemezekre ker\u00fclnek \u00edr\u00e1sra;<\/li>\n<li>A gazdag\u00e9p visszajelz\u00e9st kap a sikeres \u00edr\u00e1sr\u00f3l;<\/li>\n<li>K\u00f6zben ellen\u0151rz\u00e9s t\u00f6rt\u00e9nik, hogy a blokk \u201eforr\u00f3\u201d-e (a Populate-on-Write Threshold param\u00e9ter \u00f6sszehasonl\u00edt\u00e1s\u00e1val). Ha igen, akkor az SSD gyors\u00edt\u00f3t\u00e1rba ker\u00fcl a k\u00e9s\u0151bbi felhaszn\u00e1l\u00e1s c\u00e9lj\u00e1b\u00f3l.<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"4\"><\/a><\/noindex><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/b69debdc836e3c1d93f64aa8724dd322.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><i>Adatok \u00edr\u00e1sa, ha a gyors\u00edt\u00f3t\u00e1r olvas\u00e1s+\u00edr\u00e1s \u00fczemm\u00f3dban m\u0171k\u00f6dik<\/i><\/p>\n<p><\/p>\n<ol>\n<li>Egy \u00edr\u00e1si k\u00e9r\u00e9s a gazdag\u00e9pr\u0151l a vez\u00e9rl\u0151h\u00f6z \u00e9rkezik;<\/li>\n<li>Az adatok az SSD gyors\u00edt\u00f3t\u00e1rba \u00edr\u00f3dnak;<\/li>\n<li>A gazdag\u00e9p visszajelz\u00e9st kap a sikeres \u00edr\u00e1sr\u00f3l;<\/li>\n<li>Az SSD gyors\u00edt\u00f3t\u00e1rb\u00f3l sz\u00e1rmaz\u00f3 adatok h\u00e1tt\u00e9rben r\u00f6gz\u00edtve vannak a merevlemezeken;<\/li>\n<\/ol>\n<h2>Eset ellen\u0151rz\u00e9se <\/h2>\n<p>\n<b class=\"spoiler_title\">Tesztk\u00f6rnyezet<\/b><\/p>\n<p>2 szerver (CPU: 2 x Xeon E5-2620v3 2.4Hz \/ RAM: 32GB) k\u00f6zvetlen\u00fcl k\u00e9t porton kereszt\u00fcl van csatlakoztatva a XCubeSAN XS5224D (16GB RAM \/ vez\u00e9rl\u0151) t\u00e1rol\u00f3rendszerhez 16G Fibre Channel-en.<\/p>\n<p><\/p>\n<p>16 x Seagate Constellation ES, ST500NM0001, 500GB, SAS 6Gb\/s, RAID5 (15+1)-ben \u00f6sszevont, az adathalmazon, valamint 8 x HGST Ultrastar SSD800MH.B, HUSMH8010BSS200, 100GB, SAS 12Gb\/s gyors\u00edt\u00f3t\u00e1rk\u00e9nt haszn\u00e1lt\u00e1k.<\/p>\n<p><\/p>\n<p>2 k\u00f6tetet hoztak l\u00e9tre: egyet-egyet minden szerver sz\u00e1m\u00e1ra. <\/p>\n<h3>1. teszt. SSD gyors\u00edt\u00f3t\u00e1r csak olvas\u00e1sra 1-8 SSD-vel<\/h3>\n<p><\/p>\n<p><b>SSD Cache<\/b><\/p>\n<p><\/p>\n<ul>\n<li>I\/O t\u00edpus: Testreszab\u00e1s<\/li>\n<li>Gyors\u00edt\u00f3t\u00e1r blokkm\u00e9ret: 4MB<\/li>\n<li><b>Olvas\u00e1sra t\u00f6lt\u00e9s k\u00fcsz\u00f6b: 1<\/b><\/li>\n<li>\u00cdr\u00e1sra t\u00f6lt\u00e9s k\u00fcsz\u00f6b: 0<\/li>\n<\/ul>\n<p><b>I\/O minta<\/b> <\/p>\n<p><\/p>\n<ul>\n<li>Eszk\u00f6z: IOmeter V1.1.0<\/li>\n<li>Munk\u00e1sok: 1<\/li>\n<li>F\u00fcgg\u0151leges (Soron m\u00e9lys\u00e9g): 128<\/li>\n<li><b>Hozz\u00e1f\u00e9r\u00e9si specifik\u00e1ci\u00f3k: 4KB, 100% olvas\u00e1s, 100% v\u00e9letlen<\/b><\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/6d9f4d3912d066662067fba52eb0e938.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/665aa2f35d5d78bdb4a128eaea55faf2.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Elm\u00e9letileg, min\u00e9l t\u00f6bb SSD van a gyors\u00edt\u00f3t\u00e1r medenc\u00e9ben, ann\u00e1l jobb a teljes\u00edtm\u00e9ny. A gyakorlat ezt meger\u0151s\u00edtette. Az egyetlen jelent\u0151s n\u00f6veked\u00e9s a SSD-k sz\u00e1m\u00e1ban, alacsony k\u00f6tetek mellett nem vezet robban\u00e1sos hat\u00e1shoz. <\/p>\n<p><\/p>\n<h3>2. teszt. SSD gyors\u00edt\u00f3t\u00e1r olvas\u00e1s + \u00edr\u00e1s m\u00f3dban 2-8 SSD-vel<\/h3>\n<p><\/p>\n<p><b>SSD Cache<\/b><\/p>\n<p><\/p>\n<ul>\n<li> I\/O t\u00edpus: Testreszab\u00e1s<\/li>\n<li>Gyors\u00edt\u00f3t\u00e1r blokkm\u00e9ret: 4MB<\/li>\n<li>Olvas\u00e1sra t\u00f6lt\u00e9s k\u00fcsz\u00f6b: 1<\/li>\n<li><b>\u00cdr\u00e1sra t\u00f6lt\u00e9s k\u00fcsz\u00f6b: 1 <\/b><\/li>\n<\/ul>\n<p><b>I\/O minta<\/b> <\/p>\n<p><\/p>\n<ul>\n<li>Eszk\u00f6z: IOmeter V1.1.0<\/li>\n<li>Munk\u00e1sok: 1<\/li>\n<li>F\u00fcgg\u0151leges (Soron m\u00e9lys\u00e9g): 128<\/li>\n<li><b>Hozz\u00e1f\u00e9r\u00e9si specifik\u00e1ci\u00f3k: 4KB, 100% \u00edr\u00e1s, 100% v\u00e9letlen <\/b><\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/6177fe7ef2c74045d760ba94598acb34.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/2e1f749b827d43dd3fa8dcd33243bd9e.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Ugyanez az eredm\u00e9ny: robban\u00e1sszer\u0171 teljes\u00edtm\u00e9nyn\u00f6veked\u00e9s \u00e9s sk\u00e1l\u00e1z\u00e1s a SSD-k sz\u00e1m\u00e1nak n\u00f6vel\u00e9s\u00e9vel.<\/p>\n<p><\/p>\n<p>Mindk\u00e9t teszt sor\u00e1n a munkadathalmaz mennyis\u00e9ge kisebb volt, mint a gyors\u00edt\u00f3t\u00e1r \u00f6sszes\u00edtett kapacit\u00e1sa. Ez\u00e9rt id\u0151vel minden blokk a gyors\u00edt\u00f3t\u00e1rba m\u00e1solt. A munka l\u00e9nyeg\u00e9ben m\u00e1r SSD-n folyt, szinte \u00e9rintetlen\u00fcl hagyva a merevlemezeket. Ezeknek a teszteknek a c\u00e9lja, hogy szeml\u00e9ltess\u00e9k a gyors\u00edt\u00f3t\u00e1r felmeleg\u00edt\u00e9s\u00e9nek \u00e9s teljes\u00edtm\u00e9ny\u00e9nek sk\u00e1l\u00e1z\u00e1si hat\u00e9konys\u00e1g\u00e1t a SSD-k sz\u00e1m\u00e1nak f\u00fcggv\u00e9ny\u00e9ben.<\/p>\n<p><\/p>\n<p>Most t\u00e9rj\u00fcnk vissza a realit\u00e1sokhoz, \u00e9s ellen\u0151rizz\u00fck a val\u00f3s \u00e9lethelyzetet, amikor az adatok volumene meghaladja a gyors\u00edt\u00f3t\u00e1r m\u00e9ret\u00e9t. Annak \u00e9rdek\u00e9ben, hogy a teszt \u00e9sszer\u0171 id\u0151n bel\u00fcl zajl\u00f3djon le (a gyors\u00edt\u00f3t\u00e1r \"meleg\u00edt\u00e9s\" ideje jelent\u0151sen megn\u0151 a k\u00f6tet m\u00e9ret\u00e9nek n\u00f6vel\u00e9s\u00e9vel), a k\u00f6tet m\u00e9ret\u00e9t 120GB-ra korl\u00e1tozzuk. <\/p>\n<p><\/p>\n<h3>3. teszt. Adatb\u00e1zis m\u0171k\u00f6d\u00e9s\u00e9nek szimul\u00e1l\u00e1sa <\/h3>\n<p><\/p>\n<p><b>SSD Cache<\/b><\/p>\n<p><\/p>\n<ul>\n<li> <b>I\/O t\u00edpus: Adatb\u00e1zis<\/b><\/li>\n<li>Gyors\u00edt\u00f3t\u00e1r blokkm\u00e9ret: 1MB<\/li>\n<li>Olvas\u00e1sra t\u00f6lt\u00e9s k\u00fcsz\u00f6b: 2<\/li>\n<li>\u00cdr\u00e1sra t\u00f6lt\u00e9s k\u00fcsz\u00f6b: 1 <\/li>\n<\/ul>\n<p><b>I\/O minta<\/b> <\/p>\n<p><\/p>\n<ul>\n<li>Eszk\u00f6z: IOmeter V1.1.0<\/li>\n<li>Munk\u00e1sok: 1<\/li>\n<li>F\u00fcgg\u0151leges (Soron m\u00e9lys\u00e9g): 128<\/li>\n<li><b>Hozz\u00e1f\u00e9r\u00e9si specifik\u00e1ci\u00f3k: 8KB, 67% olvas\u00e1s, 100% v\u00e9letlen<\/b><\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"SSD gyors\u00edt\u00f3t\u00e1r megval\u00f3s\u00edt\u00e1sa a QSAN XCubeSAN t\u00e1rol\u00f3ban\" src=\"\/wp-content\/uploads\/2019\/04\/949b9fc604cf3a932ebf308d19fc9ff1.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h2>Verdikt <\/h2>\n<p><\/p>\n<blockquote><p>Nyilv\u00e1nval\u00f3 k\u00f6vetkeztet\u00e9s, hogy a SSD gyors\u00edt\u00f3t\u00e1r haszn\u00e1lat\u00e1nak hat\u00e9kony m\u00e9rt\u00e9ke jelent\u0151s a t\u00e1rol\u00f3rendszerek teljes\u00edtm\u00e9ny\u00e9nek n\u00f6vel\u00e9s\u00e9ben. <noindex><a rel=\"nofollow\" href=\"http:\/\/www.qsan.su\/goods\/sistemyi-xraneniya-dannyix\/\">QSAN XCubeSAN<\/a><\/noindex> Ez az \u00e1ll\u00edt\u00e1s teljes m\u00e9rt\u00e9kben igaz: az SSD gyors\u00edt\u00f3t\u00e1r funkci\u00f3 kiv\u00e1l\u00f3an van megval\u00f3s\u00edtva. Ez vonatkozik az olvas\u00e1si \u00e9s olvas\u00e1s + \u00edr\u00e1si m\u00f3dok t\u00e1mogat\u00e1s\u00e1ra, a munkafolyamatok rugalmas be\u00e1ll\u00edt\u00e1s\u00e1ra k\u00fcl\u00f6nb\u00f6z\u0151 felhaszn\u00e1l\u00e1si forgat\u00f3k\u00f6nyvekhez, valamint a rendszer \u00f6sszes\u00edtett teljes\u00edtm\u00e9ny\u00e9re is. Ez\u00e9rt egy nagyon \u00e9sszer\u0171 \u00e1ron (a licenc \u00e1ra egyen\u00e9rt\u00e9k\u0171 1-2 SSD k\u00f6lts\u00e9g\u00e9vel) jelent\u0151sen n\u00f6velhet\u0151 az \u00e1ltal\u00e1nos teljes\u00edtm\u00e9ny.<\/p><\/blockquote>\n<p>Forr\u00e1s: <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 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