Virtuella servrar, \u00e4ven kallade vServrar, \u00e4r ett mycket bra alternativ f\u00f6r vissa hostingprogram. Som ordet virtuell antyder \u00e4r det inte en \"riktig\" server, utan en programvara som drivs via huvudservern. S\u00e5 virtuella servrar kan konfigureras d\u00e4r som en riktig server. Detta ger naturligtvis ocks\u00e5 varje virtuell server en egen IP.
\nNedan beskrivs m\u00f6jliga till\u00e4mpningar och deras f\u00f6r- och nackdelar.<\/p>\n
Virtuella servrar som en l\u00e4genhet i villan<\/p>\n
Virtuella servrar har anv\u00e4nts inom hosting i \u00f6ver 20 \u00e5r och f\u00f6rv\u00e5nansv\u00e4rt nog \u00e4r de fortfarande en nyhet. Det \u00e4r f\u00f6rst nu som de alltmer hamnar i fokus f\u00f6r en st\u00f6rre grupp webbhotellanv\u00e4ndare.
\nF\u00f6ljande bild b\u00f6r hj\u00e4lpa dig att f\u00f6rst\u00e5 tanken med virtuella servrar:
\nHuvudservern \u00e4r en stor villa. I villan kan du hyra enskilda l\u00e4genheter. Varje l\u00e4genhet har sin egen ing\u00e5ng, brevl\u00e5da och d\u00f6rrklocka. N\u00e4r det g\u00e4ller virtuella servrar inneb\u00e4r detta:
\n- Ett eget operativsystem.
\n- egen tillg\u00e5ng
\n- en egen IP<\/p>\n
Alla l\u00e4genheter delar huvudservern som en basmodul f\u00f6r hosting. Denna vidareuthyrning av huvudservern erbjuder olika m\u00f6jligheter: Det g\u00e5r allts\u00e5 att k\u00f6ra mycket olika gamla program och \u00e4ven olika operativsystem. Trots detta bibeh\u00e5lls en h\u00f6g s\u00e4kerhetsniv\u00e5: De virtuella servrarna \u00e4r s\u00e5 oberoende att de \u00e4r j\u00e4mf\u00f6relsevis lika skyddade mot \u00e5tkomst inom servern som en huvudserver \u00e4r mot \u00e5tkomst utifr\u00e5n.
\nAnv\u00e4ndningen av virtuella servrar ger st\u00f6rre variabilitet under p\u00e5g\u00e5ende drift: Systemet kan ut\u00f6kas och uppgraderas efter behov under p\u00e5g\u00e5ende drift. Det finns inga betydande driftstopp. Till och med ett eventuellt h\u00e5rdvaruproblem kan snabbt kringg\u00e5s om det finns tillr\u00e4ckligt med ledig kapacitet: Det p\u00e5g\u00e5ende programmet tilldelas helt enkelt en ny och ledig l\u00e4genhet och \u00e4r omedelbart ig\u00e5ng igen. Under tiden kan du ta hand om h\u00e5rdvaruproblemet i den tillf\u00e4lligt tomma och tidigare l\u00e4genheten.
\nDet var trots allt tekniken med virtuella servrar som l\u00e5g till grund f\u00f6r skapandet och anv\u00e4ndningen av ett moln, som idag \u00e4r en sj\u00e4lvklarhet.<\/p>\n
F\u00f6rdelar med virtuella servrar som v\u00e4rd<\/p>\n
Genom att anv\u00e4nda virtuella servrar kan datacenterna g\u00f6ras mindre. F\u00e4rre maskiner inneb\u00e4r f\u00e4rre kablar och i slut\u00e4ndan mer golvyta. Detta har en liten, men \u00e4nd\u00e5 betydande f\u00f6rdel f\u00f6r milj\u00f6n: mindre el f\u00f6rbrukas och datacentret v\u00e4rms upp mindre.
\nServerutrymme som blir tillg\u00e4ngligt i datacentret kan dock ocks\u00e5 anv\u00e4ndas: Du kan inr\u00e4tta ett litet testcenter med gratis servrar. P\u00e5 s\u00e5 s\u00e4tt kan nya verktyg och program f\u00f6rst observeras och optimeras i lugn och ro, och i v\u00e4rsta fall f\u00f6rst\u00f6rs inte hela systemet.
\nVirtuella servrar \u00e4r mycket enkla att installera. Annars m\u00e5ste du g\u00f6ra komplicerade och tidskr\u00e4vande f\u00f6rfr\u00e5gningar till en ny server. Att konfigurera en ny virtuell server tar d\u00e4remot bara n\u00e5gra minuter.
\nMen hur \u00e4r det med f\u00f6r\u00e5ldrade program? Dessa finns \u00f6verallt i dag: hos privatpersoner, i sm\u00e5 och \u00e4ven i mycket stora f\u00f6retag. Den goda nyheten h\u00e4r: Dessa system, som k\u00f6pts f\u00f6r mycket pengar eller utvecklats internt med mycket tid, skulle normalt sett kr\u00e4va s\u00e4rskild h\u00e5rdvara eller gamla v\u00e4lk\u00e4nda operativsystem. Den virtuella servern ger dock dessa dinosaurier exakt den milj\u00f6 de beh\u00f6ver. P\u00e5 s\u00e5 s\u00e4tt kan s\u00e5dana f\u00f6r\u00e5ldrade program forts\u00e4tta att k\u00f6ras utan problem.
\nSom redan n\u00e4mnts \u00e4r molnteknik ot\u00e4nkbar utan virtuella servrar.
\nEfter alla dessa lovord b\u00f6r de som vill anv\u00e4nda virtuella servrar ocks\u00e5 t\u00e4nka p\u00e5 eventuella negativa effekter.<\/p>\n
Virtuella servrar och deras nackdelar med hosting<\/p>\n
F\u00f6rst och fr\u00e4mst har vi problemet med prestanda: virtuella servrar beh\u00f6ver tillr\u00e4ckligt med serverutrymme. Om detta inte finns tillg\u00e4ngligt och f\u00f6rst m\u00e5ste k\u00f6pas in \u00e4r det en dyr investering. Detta kan fortfarande vara meningsfullt, men m\u00e5ste beaktas i dimensionen. Vem drar nytta av virtuella servrar - en kort slutsats<\/p>\n Oavsett de eventuella konsekvenserna \u00e4r det viktigt att f\u00f6rh\u00e5llandet mellan pris och prestanda \u00e4r r\u00e4tt n\u00e4r man anv\u00e4nder en virtuell server. Det \u00e4r viktigt att vara uppm\u00e4rksam p\u00e5 st\u00f6det och dess tillg\u00e4nglighet f\u00f6r att det ska fungera smidigt. En specifikation f\u00f6r serverstopp p\u00e5 cirka 1 procent \u00e4r acceptabel, vilket motsvarar den normala tiden f\u00f6r underh\u00e5llsarbete. Virtuelle Server, auch vServer genannt, sind f\u00fcr bestimmte Hosting Einsatzbereiche eine sehr gute Option. Wie das Wort virtuell andeutet, handelt es sich ja eigentlich nicht um einen „echten“ Server, sondern um eine Software, die \u00fcber den Hauptserver betrieben wird. So k\u00f6nnen virtuelle Server dort wie ein echter Server konfiguriert werden. Jeder virtuelle Server erh\u00e4lt dadurch 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\nDet \u00e4r lika viktigt att klarg\u00f6ra hur man ska hantera eventuella licensfr\u00e5gor som uppst\u00e5r. Detta \u00e4r tr\u00e5kigt, men n\u00f6dv\u00e4ndigt.
\nVare sig det handlar om att unders\u00f6ka sin egen och redan existerande serverpotential eller om en investering: Den Bandbredd<\/a> f\u00f6r v\u00e4rdskap m\u00e5ste vara tillr\u00e4ckligt stor. Om detta inte f\u00f6ljs blir de virtuella servrarna snabbt bromsar: de s\u00e4nker hastigheten och kan till och med \"t\u00e4ppa till linjen\".
\nVirtualisering kan endast hanteras och kontrolleras p\u00e5 ett f\u00f6rnuftigt s\u00e4tt om den k\u00f6rs med en tillr\u00e4ckligt stor station\u00e4r dator. Det \u00e4r det enda s\u00e4ttet att f\u00e5 f\u00f6rdelen att snabbt kunna ingripa, hantera och kontrollera.
\nMed tanke p\u00e5 de redan n\u00e4mnda prestandabegr\u00e4nsningarna f\u00f6r virtuella servrar kan det h\u00e4nda att s\u00e4rskilt program som kr\u00e4ver mycket utrymme f\u00f6r minne eller grafik inte l\u00e4mpar sig f\u00f6r hosting via en virtuell server. Detta g\u00e4ller s\u00e4rskilt f\u00f6r multimedia, komplexa spel eller till och med omfattande ber\u00e4kningsprogram, f\u00f6r vilka du kanske m\u00e5ste hitta en annan l\u00f6sning.<\/p>\n
\nDen som b\u00f6rjar med virtuella servrar kan b\u00f6rja med ett f\u00f6rsta paket med 10 gigabyte m\u00f6jlig Trafik<\/a> kan du inte g\u00f6ra fel. Om uppgraderingar \u00e4r m\u00f6jliga kan dessa enkelt utnyttjas senare om s\u00e5 kr\u00e4vs.
\nN\u00e4r man talar om att publicera information och Uppgifter<\/a> Om du vill erbjuda ytterligare tj\u00e4nster och konfigurera egna dom\u00e4n- eller e-postservrar \u00e4r virtuella servrar idealiska. Det \u00e4r enkelt och bekv\u00e4mt att komma \u00e5t den, \u00e4ven fr\u00e5n olika platser.
\nDet \u00e4r alltid klokt att j\u00e4mf\u00f6ra priserna. N\u00e4r det g\u00e4ller l\u00e5gpriserbjudanden b\u00f6r du dock s\u00e4rskilt noga se till att det finns tillr\u00e4cklig och tillf\u00f6rlitlig support.<\/p>","protected":false},"excerpt":{"rendered":"