{"id":33718,"date":"2019-10-31T21:54:20","date_gmt":"2019-10-31T18:54:20","guid":{"rendered":"https:\/\/prohoster.info\/blog\/optimizatsiya-raboty-pochtovyh-hranilishh-v-zimbra-collaboration-suite\/"},"modified":"2019-10-31T21:54:20","modified_gmt":"2019-10-31T18:54:20","slug":"optimizatsiya-raboty-pochtovyh-hranilishh-v-zimbra-collaboration-suite","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/optimizatsiya-raboty-pochtovyh-hranilishh-v-zimbra-collaboration-suite","title":{"rendered":"E-postihoiustamise t\u00f6\u00f6 optimeerimine Zimbra Collaboration Suite'is","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00dches meie <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/zimbra\/blog\/448148\/\">eelnevatest artiklitest<\/a><\/noindex>, mis k\u00e4sitleb infrastruktuuri planeerimist Zimbra Collaboration Suite'i juurutamisel, m\u00e4rgiti, et peamine piirang selle lahenduse t\u00f6\u00f6ks on andmekandjate sisend-v\u00e4ljundite kiirus postikogudes. T\u00f5epoolest, olukordades, kus sadakond t\u00f6\u00f6tajat p\u00f6\u00f6rdub sama postikogu poole, v\u00f5ib andmeedastuskiirus k\u00f5vaketastelt olla ebapiisav teenuse vastupidavaks toimimiseks. Kuigi v\u00e4ikestes Zimbra seadmetes ei teki see suur probleem, siis suurte ettev\u00f5tete ja SaaS-teenuse pakkujate puhul v\u00f5ib see viia e-posti aeglase t\u00f6\u00f6tamiseni, mille tagaj\u00e4rjeks on t\u00f6\u00f6tajate efektiivsuse langus ja SLA rikkumine. Seet\u00f5ttu tuleb Zimbra suuremahuliste seadete projekteerimisel ja k\u00e4itamisel p\u00f6\u00f6rata erilist t\u00e4helepanu k\u00f5vaketaste t\u00f6\u00f6 optimeerimisele postikogudes. Vaatame kahte juhtumit ja p\u00fc\u00fcame v\u00e4lja selgitada, milliseid optimeerimisv\u00f5tteid andmekogude koormuse v\u00e4hendamiseks saab igas neist rakendada.<\/p>\n<p><img decoding=\"async\" alt=\"E-postihoiustamise t\u00f6\u00f6 optimeerimine Zimbra Collaboration Suite&#039;is\" src=\"\/wp-content\/uploads\/2019\/05\/2e73b4fd68d15459425cfa30d1d388a4.jpeg\" style=\"display:block;margin: 0 auto;\" \/><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p><b>1. Suure mahutavusega Zimbra paigaldamise optimeerimine<\/b><\/p>\n<p>Kuna Zimbra suure koormusega paigalduse kavandamise etapis peab administraator valima, millist andmesalvestuss\u00fcsteemi kasutada. Selle k\u00fcsimuse lahendamiseks on oluline teada, et peamine koormus HDD-dele p\u00e4rineb Zimbra Collaboration Suite'i andmebaasist MariaDB, otsingus\u00fcsteemist Apache Lucene ja BLOB-objektide salvestamisest. Seet\u00f5ttu on nende tarkvaratoodete t\u00f6\u00f6tamiseks k\u00f5rge koormusega tingimustes vajalik kasutada kiiret ja usaldusv\u00e4\u00e4rset riistvara. <\/p>\n<p>Tavalistes tingimustes saab Zimbat paigaldada nii RAID-k\u00f5vakettadele kui ka NFS-protokolli kaudu \u00fchendatud salvestuslahendustele. V\u00e4ikestes paigaldustes on v\u00f5imalik Zimbra paigaldada ka tavalisele SATA-kettale. Kuid suurte paigaldiste korral n\u00e4itavad k\u00f5ik need tehnoloogiad erinevaid puudusi, n\u00e4iteks madalam kirjutamiskiirus v\u00f5i madal usaldusv\u00e4\u00e4rsus, mis ei ole vastuv\u00f5etav suurettev\u00f5tetele ega veel enam SaaS-teenuse pakkujatele.<\/p>\n<p>Seet\u00f5ttu on Zimbra ulatuslike infrastruktuuride tingimustes parim kasutada SAN-i. See suudab praegu pakkuda suurimat l\u00e4bilaskev\u00f5imet salvestusseadmete jaoks ning t\u00e4nu suure arvu vahem\u00e4lu \u00fchendamise v\u00f5imalusele toob selle kasutamine ettev\u00f5ttele praktiliselt nullriski. Hea idee on kasutada NVRAM-i, mida kasutatakse paljudes SAN-ides, et kiirendada kirjutamise ajal. K\u00fcll aga on soovitatav keelata kirjutatavate andmete vahem\u00e4lu kogumine ketastel, kuna see v\u00f5ib p\u00f5hjustada p\u00f6\u00f6rdumatut kahjustumist ja andmete kaotust toiteprobleemide korral.<\/p>\n<p>Mis puudutab failis\u00fcsteemi valikut, siis parim valik on kasutada Linuxi standardseid Ext3\/Ext4. Peamine n\u00fcanss failis\u00fcsteemis on see, et see tuleks monteerida parameetriga <b>-noatime<\/b>. See seade keelab viimase faili juurde p\u00e4\u00e4semise aja fikseerimise, mis oluliselt v\u00e4hendab lugemise ja kirjutamise koormust. \u00dcldiselt peaks Zimbra failis\u00fcsteemi ext3 v\u00f5i ext4 loomisel kasutama j\u00e4rgmisi utiliidi parameetreid. <b>mke2fs<\/b>:<\/p>\n<blockquote><p><b>-j<\/b> \u2014 Failis\u00fcsteemi loomine ext3\/ext4 p\u00e4evikuga.<br \/>\n<b>-L NIMI<\/b> \u2014 Mahu nime loomiseks, et hiljem kasutada seda \/etc\/fstab.<br \/>\n<b>-O dir_index<\/b> \u2014 Failide otsingu kiirendamiseks suuremates kataloogides kasutada hash-puu.<br \/>\n<b>-m 2<\/b> \u2014 2% maht reserveerida suurte failis\u00fcsteemide jaoks juurkatalooge.<br \/>\n<b>-J size=400<\/b> \u2014 Suure p\u00e4eviku loomiseks.<br \/>\n<b>-b 4096<\/b> \u2014 Bloki suuruse m\u00e4\u00e4ramiseks baitides.<br \/>\n<b>-i 10240<\/b> \u2014 S\u00f5numite salvestamiseks peab see parameeter vastama s\u00f5numite keskmisele suurusele. Selle parameetri m\u00e4\u00e4ratlemisele tuleb t\u00e4helepanu p\u00f6\u00f6rata, kuna hiljem ei saa seda muutuda.<\/p><\/blockquote>\n<p>\nLisaks soovitatakse lubada <b>dirsync<\/b> BLOB-objektide, Lucene'i metaandmete otsingutalituse ja MTA j\u00e4rjekorra salvestamiseks. Seda tuleb teha, kuna tavaliselt kasutab Zimbra utiliiti. <b>fsync<\/b> andmete blob garantitud salvestamiseks kettale. Siiski, kui Zimbra postihalduss\u00fcsteem v\u00f5i MTA loob uusi faile s\u00f5numite tarnimise ajal, tekib vajadus salvestada kettale muudatused, mis on toimunud vastavates kaustades. Just seet\u00f5ttu, et isegi juhul, kui fail on juba kettale salvestatud, v\u00f5ib teave selle lisamisest direktori sissehelistamisele mitte j\u00f5uda ja seet\u00f5ttu v\u00f5ib see ootamatute serveri t\u00f5rgete t\u00f5ttu kaduma minna. <b>fsync<\/b>nende probleemide v\u00e4ltimiseks. <b>dirsync<\/b> 2. Zimbra t\u00f6\u00f6tava infrastruktuuri optimeerimine<\/p>\n<p><b>Tihti juhtub, et p\u00e4rast Zimbra kasutamise mitut aastat suureneb kasutajate arv m\u00e4rkimisv\u00e4\u00e4rselt ja teenuse t\u00f6\u00f6 on iga p\u00e4evaga \u00fcha v\u00e4hem vastutulelik. Lahendus ei ole keeruline: tuleb lihtsalt infrastruktuurile lisada uusi servereid, et teenus t\u00f6\u00f6taks taas sama kiiresti nagu varem. Samas ei ole alati v\u00f5imalik kohe lisada uusi servereid, et suurendada infrastruktuuri j\u00f5udlust. Sageli peavad IT-juhid pikalt koosk\u00f5lastama<\/b><\/p>\n<p>Tihti juhtub, et p\u00e4rast mitut aastat Zimbra kasutamist kasvab kasutajate arv oluliselt ja teenuse toimimine muutub iga p\u00e4evaga j\u00e4rjest v\u00e4hem vastutulelikuks. Lahendus sellele probleemile on selge: tuleb lihtsalt lisada uusi servereid infrastruktuuri, et teenus t\u00f6\u00f6taks taas sama kiiresti kui varem. Samas ei ole alati v\u00f5imalik kohe lisada uusi servereid infrastruktuuri, et parandada selle j\u00f5udlust. Sageli peavad IT-juhid pikka aega koosk\u00f5lastama uute serverite ostmist. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/et\/server\/\"   title=\"uute serverite soetamist.\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"770\">uute serverite soetamist.<\/a> raamatupidamise v\u00f5i turbeosakonnaga, lisaks toovad sageli pettuseid ka tarnijad, kes v\u00f5ivad uue serveri hilja toimetada v\u00f5i tuua t\u00e4iesti vale toote.<\/p>\n<p>Muidugi on parim \u00fcles ehitada oma Zimbra infrastruktuuri varuga, et alati oleks ruumi laiendamiseks ja mitte kellelegi s\u00f5ltuda, kuid kui viga on juba tehtud, j\u00e4\u00e4b IT-juhile vaid maksimaalselt siluda selle tagaj\u00e4rgi. N\u00e4iteks v\u00f5ib IT-juhik saavutada v\u00e4ikese j\u00f5udluse kasvu, kasutades ajutist Linuxi s\u00fcsteemiteenuste v\u00e4ljal\u00fclitamist, mis t\u00f6\u00f6tamise k\u00e4igus pidevalt k\u00f5vakettale p\u00f6\u00f6rdub ja seet\u00f5ttu v\u00f5ib negatiivselt m\u00f5jutada Zimbra t\u00f6\u00f6d. N\u00e4iteks v\u00f5ib ajutiselt v\u00e4lja l\u00fclitada:<\/p>\n<blockquote><p><b>autofs, netfs<\/b> \u2014 Kaugfailis\u00fcsteemide avastamise teenused<br \/>\n<b>cups<\/b> \u2014 Printimisteenus<br \/>\n<b>xinetd, vsftpd<\/b> \u2014 Sisseehitatud *NIX teenused, mis t\u00f5en\u00e4oliselt ei ole teile vajalikud <br \/>\n<b>portmap, rpcsvcgssd, rpcgssd, rpcidmapd<\/b> \u2014 Kaugprotseduuride teenused, mida tavaliselt kasutatakse koos v\u00f5rgufailis\u00fcsteemidega<br \/>\n<b>dovecot, cyrus-imapd, sendmail, exim, postfix, ldap<\/b> \u2014 Zimbra Collaboration Suite'i kuuluvate p\u00f5hiteenuste koopiad<br \/>\n<b>slocate\/updatedb<\/b> \u2014 Kuna Zimbra salvestab iga s\u00f5numi eraldi failina, v\u00f5ivad iga p\u00e4ev k\u00e4ivitatavad updatedb teenused tekitada probleeme, seega v\u00f5ib seda teha k\u00e4sitsi k\u00f5ige v\u00e4iksema koormuse ajal serverites.<\/p><\/blockquote>\n<p>\nS\u00fcsteemiressursside s\u00e4\u00e4stmine nende teenuste v\u00e4ljal\u00fclitamise kaudu ei ole v\u00e4ga m\u00e4rkimisv\u00e4\u00e4rne, kuid isegi see v\u00f5ib osutuda \u00e4\u00e4rmiselt kasulikuks kriitilistes olukordades. P\u00e4rast uue serveri lisamist Zimbra infrastruktuuri on soovitatav uuesti lubada eelnevalt v\u00e4lja l\u00fclitatud teenused.<\/p>\n<p>Zimbra t\u00f6\u00f6 efektiivsust saab samuti optimeerida, viies syslog teenuse eraldi serverisse, et see ei koormaks meilis\u00fcsteemide k\u00f5vakettasid t\u00f6\u00f6tamise ajal. Selleks sobib praktiliselt iga arvuti, sealhulgas odav \u00fcheplaadina Raspberry Pi.<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/zimbra\/blog\/451920\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043e\u0434\u043d\u043e\u0439 \u0438\u0437 \u043d\u0430\u0448\u0438\u0445 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u0445 \u0441\u0442\u0430\u0442\u0435\u0439, \u043f\u043e\u0441\u0432\u044f\u0449\u0435\u043d\u043d\u043e\u0439 \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044e \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b \u043f\u0440\u0438 \u0432\u043d\u0435\u0434\u0440\u0435\u043d\u0438\u0438 \u043d\u0430 \u043f\u0440\u0435\u0434\u043f\u0440\u0438\u044f\u0442\u0438\u0438 Zimbra Collabortion Suite, \u0431\u044b\u043b\u043e \u0441\u043a\u0430\u0437\u0430\u043d\u043e, \u0447\u0442\u043e \u0433\u043b\u0430\u0432\u043d\u044b\u043c \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0435\u043c \u043f\u0440\u0438 \u0440\u0430\u0431\u043e\u0442\u0435 \u044d\u0442\u043e\u0433\u043e \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c \u0432\u0432\u043e\u0434\u0430-\u0432\u044b\u0432\u043e\u0434\u0430 \u0434\u0438\u0441\u043a\u043e\u0432\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 \u0432 \u043f\u043e\u0447\u0442\u043e\u0432\u044b\u0445 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430\u0445. \u0418 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0442\u0435\u043b\u044c\u043d\u043e, \u0432 \u0442\u043e \u0432\u0440\u0435\u043c\u044f, \u043a\u043e\u0433\u0434\u0430 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0441\u043e\u0442\u0435\u043d \u0440\u0430\u0431\u043e\u0442\u043d\u0438\u043a\u043e\u0432 \u043f\u0440\u0435\u0434\u043f\u0440\u0438\u044f\u0442\u0438\u044f \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e \u043e\u0431\u0440\u0430\u0449\u0430\u044e\u0442\u0441\u044f \u043a \u043e\u0434\u043d\u043e\u043c\u0443 \u0438 \u0442\u043e\u043c\u0443 \u0436\u0435 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u043c\u0443 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0443, \u0448\u0438\u0440\u0438\u043d\u044b \u043a\u0430\u043d\u0430\u043b\u0430 \u0434\u043b\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25398,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-33718","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com 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