Xairetismata apo Agglia Thn perasmenh Pempth parakolouthisa sto Londino to seminario ths IBM me thema: "Migration from solari to Linux on OpenPower". H IBM exei ftiaxei kati dynata chipakia kai thelei na lansarei servers. Se sygrish me ton G5 pou poulane sthn Apple, o Power 5 exei to idio instruction set kai kwdikas pou trexei ston ena epexergasth trexei kai ston allon. O power 5 omws den exei thn Altivec mhxanh. Antitheta einai...dual core kai exei ena switch mesa ston epexergasth. To idiaitero me ton sygekrimmeno epexergasth einai oti mporei na kanei kapoios partitions sth cpu kai na xrhsimopoiei pososta ths epexergastikhs tou isxuos san na einai omws ena teleiws diaforetiko susthma. Gia epeidhxh eixan enan server me 4 epexergastes o opoios etrexe 9(!) versions tou Linux tautoxrona. Debian, Redhat, Slackware, SuSE me purhnes 2.4.x kai 2.6.x. Mporei etsi kapoios na kanei dynamika anakatanomh stous ypologistikous porous kai na auxhsh to cpu time pou dinetai se kapoion epexergasth. Symfwna me ereunes pou eixe kanei h IBM, mexri kai to 65% enos server mporei na einai idle. Me th dikh tous arxitektonikh tha mporei kapoios na axiopoihsei kalytera tous porous tou epexergasth. Px na exei ena partition gia kathe tier anti na trexei se xexwristous ypologistes. Moiazei me idea mainframe. Sth praxh einai ena mainframe to opoio omws leitourgei san cluster. Yphrxan omilhtes apo th Forrester research pou mas milhsan gia to Linux kai gia to kostos. To kostos sto Linux einai fthnotero apo alla Unix kai leitourgika ths Microsoft giati exei fthnotero kostos apokthshs, fthnotero kostos diaxeirishs kai fthnotero kostos sto na prostheteis efarmoges kai anabathmiseis (incrementation cost). Enas omiliths apo thn Oracle mas milhse gia to poso pisteuei h Oracle sto Linux kai gia to poso prospathoun na piesoun tous pelates tous na gyrisoun se Linux. Thewroun thn platforma openpower ws thn kalyterh platforma auth th stigmh. Epishs mas eipe oti to data centre ths etaireias sto Texas trexei Linux. Oi yphresies business on demand pou parexei h Oracle trexoun se Linux kai exyphretoun 250000 pelates s'olon ton kosmo. Mas milhse kai enas apo thn Novell o opoios proerxontan apo th SuSE. Mas eipe xaritologontas oti h SuSE agorase th Novell. Mas eipe oti h exagora bohthise sumantika kai tous duo. H SuSE htan mia mesaia Eurwpaikh etaireia kai de mporouse na epektathei sthn Amerikanikh agora. H Novell apekthse ena kataplhtktiko proion. H Novell exei shmantika esoda kai tha auxhthoun perissotera apo th Microsoft...kai sto thema twn pwlhsewn kai sto dikastiko thema. Mas milhse gia ta proionta SLES kai Novell enterprise desktop. Basika h diafora tous apo to SuSE Linux professional einai oti auta exoun dokimastei kai oti parexoun sumbolaia support. Yphrxe ena foyer me diaforous ekthetes. Eixa mia syzhthsh me kapoious apo th Novell. Basika den petane to NetWare. Antitheta to epekteinoun mesw tou Linux. To Noven OpenServer exei duo diskakia, to ena exei Linux kai to allo exei to NetWare. Yparxoun periptwseis opou kapoioi mporei na protimhsoun thn egatastash ths mias platformas apo thn allh, opws exoikiwsh me to programmatistiko periballon. Rwthsa thn IBM merika pragmata. Prwtwn den paratane to AIX. To AIX kanei kalytero scalling se pollous epexergastes. To Linux einai kalh kai fthnh lysh se periballonta me ligous epexergastes kai se horizontal scallability. Epishs rwthsa ean kapoios einai hosting provider kai oi ypopshfioi pelates rwthsoun giati einai kalytero na noikiasoun ena partition se open power ap'to na noikiasoun enan dedicated server. Mou apanthse oti sto open power tha mporei ean thelei perissoterh isxuh na to zhthsei kai na to parei amesa kai otan den th xreiazetai pia na thn epistrepsei pisw kai etsi na exei ligoterh xrewsh. An exei enan dedicated server tote tha thelei migration kai tha kostisei parapanw se xrhma kai xrono to na allaxei dedicated server. Telos ton rwthsha pws exasfalizetai enas pelaths ean o antagwnisths tou exei ena allo partition sto systhma. Mou eipe oti sth xrhsh einai teleiws diaforetika systhmata. Akoma kai an crasharei epithdes o enas to diko tou partition, auto de tha exei epiptwseis sta systhmata twn allwn. Endiaferousa arxitektonikh. Pantws de me peithei sto thema tou redundancy. Polles fores mporei kapoios na thelei redundant server kai na to exei se diaforetiko mhxanhma. To na baleis ola ta auga sto idio kalathi, akoma kai an einai ftiagmeno apo aerogel mou prokalei anyshxies. Pali tha protimousa ena redundant server se diaforetiko hardware ap'oti s'ena diaforetiko partition. Eseis ti lete? Giannhs ps: To seminario egine sto xenodoxeio Le Meridien sto Piccadilly. Eixe kai mpoufe to meshmeri. Thymamai perusi Ioulio sto workshop pou eixa erthei sthn Asoee eixame...POLY KALYTERO MPOUFE!!! Eixame epishs kai krues mpuritses.