{"id":4312,"date":"2020-10-30T23:27:14","date_gmt":"2020-10-30T22:27:14","guid":{"rendered":"https:\/\/webhosting.de\/?p=4312"},"modified":"2020-10-30T23:27:14","modified_gmt":"2020-10-30T22:27:14","slug":"databasserver","status":"publish","type":"post","link":"https:\/\/webhosting.de\/sv\/datenbank-server\/","title":{"rendered":"Databasserver"},"content":{"rendered":"

En databasserver kan implementeras som mjukvara eller h\u00e5rdvara i ett databassystem. I de flesta fall \u00e4r den en del av en serverarkitektur med flera niv\u00e5er. Databasservern \u00e4r v\u00e4rd f\u00f6r ett eller flera databassystem. Databasservern kan n\u00e5s via applikationsservern, som inneh\u00e5ller programvaran. Databasservrar g\u00f6r till exempel f\u00f6retagsdata tillg\u00e4ngliga f\u00f6r datorer i n\u00e4tverket via till\u00e4mpningsprogrammen. De fungerar som noder i f\u00f6retagets n\u00e4tverksarkitektur. Databasservarnas maskinvara, programvara och till\u00e4mpningsm\u00f6jligheter \u00e4r en del av IT-industrin. Datavetare med kunskaper inom serverarkitektur och n\u00e4tverksteknik \u00e4r specialiserade p\u00e5 underh\u00e5ll, v\u00e5rd och \u00e5terst\u00e4llning av databasservrar efter systemkrascher.<\/p>\n

Programvarubaserad databasserver<\/h3>\n

Databassystem, t.ex. Oracle, Firebird, Microsoft<\/a> SQL Server eller MySQL<\/a> har en enorm spridning av anv\u00e4ndningsomr\u00e5den. De anv\u00e4nds i f\u00f6retagsgrupper, medelstora f\u00f6retag och av privata anv\u00e4ndare. Innan du k\u00f6per och implementerar ett n\u00e4tverk med en databasserver \u00e4r det viktigt att planera i f\u00f6rv\u00e4g. Databasserverns roll i tillhandah\u00e5llandet av data b\u00f6r definieras exakt. Man kan anv\u00e4nda fackpressen och Internet f\u00f6r att unders\u00f6ka om programvaran \u00e4r kompatibel med databassystemet eller databasservern utan fel. Fel i tillhandah\u00e5llandet eller \u00f6verf\u00f6ringen av data leder till st\u00f6rningar i processerna och felaktiga arbetsresultat.<\/p>\n

Databasserver i form av h\u00e5rdvara<\/h3>\n

I sm\u00e5 och medelstora databassystem \u00e4r databasservern utformad p\u00e5 exakt samma s\u00e4tt som en vanlig n\u00e4tverksserver. Minnesenheter, anslutningar och CPU \u00e4r utformade f\u00f6r att anv\u00e4ndas i ett n\u00e4tverk. I storskaliga n\u00e4tverk f\u00f6r medelstora f\u00f6retag och koncerner anv\u00e4nds speciellt konstruerade datorer som servrar och databasservrar.<\/p>\n

Felk\u00e4llor vid anv\u00e4ndning av databasservrar<\/h3>\n

En databasserver uts\u00e4tts f\u00f6r enorma belastningar under drift. M\u00f6jligheterna till fel str\u00e4cker sig fr\u00e5n \u00f6verhettning p\u00e5 grund av kontinuerlig drift, fel i databasprogramvaran, mekaniska skador p\u00e5 lagringsmedierna till skador orsakade av datavirus och hackerattacker. Innan data\u00e5terst\u00e4llningen p\u00e5b\u00f6rjas b\u00f6r felk\u00e4llan fastst\u00e4llas exakt. Programvarufel kan i de flesta fall repareras med hj\u00e4lp av verktyg i databasprogrammet.<\/p>\n

Konsekvenserna av mekaniska skador eller hackarangrepp b\u00f6r \u00e5tg\u00e4rdas av specialister. IT-f\u00f6retag som \u00e4r specialiserade p\u00e5 n\u00e4tverksteknik och serverteknik har l\u00e4mpliga lokaler och teknisk utrustning f\u00f6r professionell data\u00e5terst\u00e4llning. S\u00e4kerhetskopiering av Uppgifter<\/a> fr\u00e5n databasservern kan st\u00f6djas i f\u00f6rv\u00e4g genom regelbundna s\u00e4kerhetskopior. Detta underl\u00e4ttar data\u00e5tervinningen och minimerar skadorna som orsakas av datorhaverier.<\/p>\n

Freeware eller v\u00e4lk\u00e4nt programvaruf\u00f6retag?<\/h3>\n

Produkterna fr\u00e5n v\u00e4lk\u00e4nda programvaruf\u00f6retag som Oracle, Microsoft och SAP har utm\u00e4rkta funktioner. Deras priser kan \u00f6verstiga budgeten f\u00f6r medelstora f\u00f6retag eller sm\u00e5 f\u00f6retag. Programvarubaserade databasservrar som gratisprogram kan fungera lika bra som marknadsledarnas dyra produkter. MySQL fr\u00e5n det svenska programvaruf\u00f6retaget med samma namn utvecklades som en del av ett forskningsprojekt. K\u00e4llkoden \u00e4r fritt tillg\u00e4nglig. Anv\u00e4ndningen \u00e4r gratis. Programvaran f\u00f6r databasservern Firebird skapades som en del av programvaruutvecklingen av Borlans InterBase. SAP DB \u00e4r ett projekt med \u00f6ppen k\u00e4llkod fr\u00e5n den v\u00e4rldsber\u00f6mda programvarutillverkaren i Walldorf, som \u00e4r fritt tillg\u00e4nglig som databasserver. De n\u00e4mnda databasservrarna l\u00e4mpar sig utm\u00e4rkt f\u00f6r administration av data i backend-omr\u00e5det och lagring av databaser f\u00f6r \u00f6verf\u00f6ring till arbetsstationer. Programvarans kompatibilitet med frontmoduler och befintliga dataformat b\u00f6r kontrolleras innan du anv\u00e4nder en gratisprogram-databasserver.<\/p>","protected":false},"excerpt":{"rendered":"

Ein Datenbank Server kann als Software oder als Hardware in einem Datenbanksystem implementiert sein. Er ist in der Mehrzahl der F\u00e4lle Teil einer mehrschichtigen Serverarchitektur. Der Datenbank Server beherbergt ein Datenbanksystem oder mehrere Datenbanksysteme. \u00dcber den sogenannten Applikationsserver, der die Anwendungssoftware beinhaltet, kann auf den Datenbank Server zugegriffen werden. Datenbankserver stellen zum Beispiel Unternehmensdaten \u00fcber 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