I-Intel Xeon E5 vs Intel Core i7: Uyini Umehluko?
2024-11-26 09:42:01
Okuqukethwe
Lapho ukhetha phakathi kwamaphrosesa amabili adume kakhulu e-Intel, i-Intel Xeon E5 ne-Intel Core i7, kubalulekile ukubamba izici ezihlukene, amandla okusebenza, nezimakethe eziqondiwe. Iphrosesa ye-Xeon E5 yenzelwe izindawo zeseva nezindawo zokusebenza ezichwepheshile, kuyilapho iphrosesa ye-Core i7 ihloselwe amadeskithophu asebenza kahle kakhulu namalaptop abathengi.
I-Key Takeaway
I-Intel Xeon E5: Ihamba phambili emisebenzini yezinga lebhizinisi, enikeza izici ezifana nenkumbulo ye-ECC nokusekelwa okunamasokhethi amaningi, kodwa ngentengo ephezulu.
I-Intel Core i7: Ithengeka kakhulu futhi ifaneleka kangcono izidingo zabathengi, ihamba phambili emidlalweni nezinhlelo zokusebenza zemultimedia ezinejubane eliphezulu lewashi.
1. Uhlolojikelele olufushane lwe-Intel Xeon E5
I-Intel Xeon E5 iwuchungechunge lwe ama-server-grade processors adizayinelwe iziteshi zokusebenza, izikhungo zedatha, nezindawo zamabhizinisi. Iyingxenye yomndeni wakwa-Intel's Xeon, ogxile ekuletheni ukuthembeka okuphezulu, ukuqina, nokusebenza kwezicelo ezifunwayo ezifana nokwenza ngokoqobo, ukucutshungulwa kwedatha, nokulingisa kwesayensi.
Izici ezibalulekile ze-Xeon E5 zifaka:
I-ECC (Ikhodi Yokulungisa Iphutha) isekela inkumbulo, okuqinisekisa ubuqotho bedatha futhi enciphisa ingcuphe yokuphahlazeka kumasistimu abalulekile emishini.
Amasokhethi amaningi amandla, okuvumela amaphrosesa amaningi ukuthi asebenze ndawonye, okuvumela ukukala okukhulu komthwalo osindayo.
Izibalo eziphezulu eziyinhloko futhi ezithuthukisiwe intambo eminingi ukusebenza, okuvumela i-Xeon E5 ukuthi isingathe imisebenzi eyinkimbinkimbi ngasikhathi sinye, iyenze ilungele izinhlelo zokusebenza ezinzima zedatha.
2. Isingeniso se-Intel Core i7
I-Intel Core i7 iyiphrosesa esebenza kahle kakhulu eyakhelwe ngokuyinhloko amadeskithophu abathengi namalaptop. Nakuba inikeza ukusebenza okuhle kakhulu kwemisebenzi efana nemidlalo, ukuhlela ividiyo, nokunikezela nge-3D, igxile kakhulu ekunikezeni amandla ekhompuyutha yomuntu siqu kunezinhlelo zokusebenza zebhizinisi.
Izici ezibalulekile ze-Core i7 zifaka:
Ubuchwepheshe be-Turbo Boost, okwandisa isivinini sewashi ngokushintshashintshayo uma kudingeka ukuze kunikeze ukusebenza okusheshayo kwemisebenzi enzima.
I-Integrated Graphics (kuye ngemodeli), kunciphisa isidingo sekhadi lehluzo elihlukile ezimweni zansuku zonke zekhompuyutha.
Ubuchwepheshe be-Hyper-Threading, okuvumela umongo ngamunye ukuthi uphathe imicu eminingi ngesikhathi esisodwa, uthuthukise ukusebenza ezinhlelweni ezinemicu eminingi.
I Ingqikithi i7 ilungele abasebenzisi abadinga ukusebenza okuphezulu kwekhompuyutha kuyo yomibili imisebenzi yansuku zonke kanye nemithwalo yemisebenzi ekhethekile efana nemidlalo, ukuhlela ividiyo, nokudalwa kokuqukethwe.
3.Umehluko Obalulekile Phakathi kwe-Intel Xeon E5 ne-Intel Core i7
Uma uqhathanisa i-Intel Xeon E5 ne-Intel Core i7, kubalulekile ukuqonda umehluko obalulekile phakathi kwalawa maphrosesa amabili. Ngenkathi zombili zinikeza ukusebenza okuhle kakhulu, zenzelwe izimo zokusetshenziswa ezihlukile. Ngezansi kunomehluko omkhulu obeka i-Xeon E5 ngaphandle kwe-Core i7.
A. Imakethe Eqondiwe kanye Namacala Okusebenzisa
I-Xeon E5: Ibhizinisi Nezindawo Zokusebenzela
I I-Intel Xeon E5 yakhelwe ngokuyinhloko amaseva, izikhungo zokusebenza, nezikhungo zedatha. Idizayinelwe ukuphatha imithwalo yemisebenzi enzima yezinga lebhizinisi efana ne-virtualization, i-cloud computing, nokucubungula idatha enkulu. Lawa ma-processor alungele izindawo ezitholakala kakhulu lapho isikhathi nokuthembeka kubaluleke kakhulu.
Izimo zokusetshenziswa eziyinhloko zifaka ucwaningo lwesayensi, ukumodela kwezezimali, nokubamba imishini ebonakalayo, lapho kudingeka khona amandla okuhlanganisa nokusimama okudingekayo.
I-Core i7: Amakhompyutha Aphathekayo Abathengi Nasebenza Kakhulu
I I-Intel Core i7, ngakolunye uhlangothi, ihloselwe amadeskithophu asebenza kahle kakhulu namalaptop. Ilungele abathengi abafuna amaphrosesa anamandla emidlalo, ukuhlela ividiyo, nokudala okuqukethwe. Nakuba i-Core i7 yenza kahle kakhulu emisebenzini efana nemidlalo, ukunikezwa kwe-3D, nokwenza izinto eziningi, ayinazo izici ezithuthukile nokuqina okunikezwa i-Xeon E5.
I-Core i7 ilungile kubasebenzisi abafuna isivinini sokucubungula ngokushesha, kodwa ayidingi izici zeleveli yebhizinisi njengememori ye-ECC noma amakhono anesokhethi eningi.
B.Umehluko Wokusebenza
Isivinini Sewashi nokubala Okubalulekile
I-Intel Xeon E5 amaphrosesa ngokuvamile anesivinini esiphansi sewashi uma kuqhathaniswa ne-Core i7, kodwa anxephezela ngokubala okuphezulu okubalulekile. I-Xeon E5 ivamise ukuza nanoma yikuphi kusuka ku-6 kuya ku-22 cores, kuya ngemodeli. Lokhu kuyenza ibe yinhle kakhulu emisebenzini engasebenzisa ukusebenza kwe-multi-core, njengokucubungula idatha nokwenza izinto ezibonakalayo.
I Ingqikithi i7, ngenkathi inikeza ama-cores ambalwa (ngokuvamile angu-4 kuya ku-8), inesivinini esiphezulu sewashi, okuyenza ifanelekele kangcono imisebenzi edinga ukusebenza okuphezulu kwe-single-core, njengokudlala amageyimu noma ukuthuthukiswa kwesofthiwe. I-Core i7 iphinde izuze kubuchwepheshe be-Intel's Turbo Boost, obuvumela iphrosesa ukuthi ikhulise ngokuzenzakalelayo isivinini sewashi ngaphansi komthwalo osindayo.
I-Multi-threading ne-Hyper-Threading
I Xeon E5 isekela i-Hyper-Threading kuwo wonke ama-cores, okuvumela umongo womzimba ngamunye ukuthi uphathe imicu emibili ngesikhathi esisodwa. Lokhu kusiza ukuthuthukisa ukucutshungulwa okuhambisanayo kwemisebenzi engasebenzisa imicu eyengeziwe, njengezinhlelo zokusebenza zeseva nezimo zemisebenzi eminingi.
I Ingqikithi i7 futhi isekela i-Hyper-Threading, kodwa ukubala kwayo okuyisisekelo okuphansi kusho ukuthi, nakuba ingase yenze kangcono izinhlelo zokusebenza ezinomucu owodwa, ingazabalaza nemithwalo yemisebenzi ehambisana kakhulu uma iqhathaniswa ne-Xeon E5.
C. Ukusetshenziswa kwamandla kanye Nempumelelo
I-Thermal Design Power (TDP)
I Xeon E5 amaphrosesa ngokuvamile ane-TDP ephakeme (phakathi kuka-85W kuya ku-140W) uma kuqhathaniswa ne-Core i7, okubenza balambe amandla kakhudlwana. Lokhu kungenxa yokuthi ama-Xeon E5 processors aklanyelwe ukusebenza ngokucushwa okunamasokhethi amaningi futhi asingathe imithwalo esindayo edinga amandla engeziwe.
I Ingqikithi i7 amaphrosesa, ngokuphambene, angonga amandla kakhudlwana, anezilinganiso ze-TDP ezisukela ku-35W kuya ku-95W, okuwenza alungele izinhlelo zedeskithophu nekhompyutha ephathekayo lapho ukusebenza kahle kwamandla kubalulekile empilweni yebhethri nezixazululo zokupholisa.
Ukusebenza Kwamandla Ezindaweni Ezihlukene
I Xeon E5 iphumelela kakhulu ezindaweni lapho kulindeleke khona umthwalo osindayo njalo, njengoba iklanyelwe ukusebenza ngamandla aphelele isikhathi eside ngaphandle kokunyakazisa. Nokho, lokhu kuza ngezindleko zokusetshenziswa kwamandla aphezulu.
I
Ingqikithi i7 inikeza ukusebenza kahle kwamandla okungcono kwezinhlelo zokusebenza zabathengi, okuyenza ifanelekele ukusetshenziswa kwansuku zonke lapho kudingeka khona ukusebenza, kodwa hhayi kumazinga aphezulu afanayo noma ubude besikhathi njengasezindaweni zeseva.
| Isici | I-Intel Xeon E5 | I-Intel Core i7 |
| Imakethe ehlosiwe | Amaseva, Izikhungo Zokusebenzela, Izikhungo Zedatha | Amadeskithophu asebenza kahle kakhulu, amalaptop |
| Ukubala Okubalulekile | 6-22 cores | 4-8 amaphuzu |
| I-Hyper-Threading | Yebo, kuwo wonke ama-cores | Yebo, kumamodeli amaningi |
| Isivinini Sewashi Lesisekelo | Iphansi, ithuthukiselwe imisebenzi enezingqikithi eziningi | Okuphezulu, okulungiselelwe imisebenzi ye-single-core |
| I-TDP | 85W-140W | 35W-95W |
| Ukusekelwa Kwememori ye-ECC | Yebo | Cha |
| Ikesi elingcono kakhulu lokusebenzisa | Ukucutshungulwa Kwedatha, I-Virtualization, Amaseva | Imidlalo, ukuhlela ividiyo, ukudalwa kokuqukethwe |
4.Umehluko Wezakhiwo Nezici Phakathi kwe-Intel Xeon E5 ne-Intel Core i7
Womabili ama-Intel Xeon E5 kanye ne-Intel Core i7 processors afika nezici zezakhiwo ezihlukile eziwenza afanelekele imisebenzi eyahlukene. Ngenkathi womabili amaphrosesa akhiwe nge-Microarchitecture ethuthukisiwe ye-Intel, aqondise izimakethe ezihlukile, okusho ukuthi anikeza izici ezihlukene, ukulungiselelwa kokusebenza, namandla. Kulesi sigaba, sizoqhathanisa izakhiwo nezici ezibalulekile zephrosesa ngayinye, sigxile emandleni azichazayo.
I-A. Xeon E5 Izakhiwo kanye nezici ezithuthukile
I-Intel Xeon E5 yakhelwe ukusebenza kwe-server-grade, ukwethembeka, kanye nokukala. Izakhiwo zayo zakhelwe ukuphatha imithwalo yemisebenzi yebhizinisi, efana nokucubungula idatha, i-virtualization, kanye nekhompyutha esebenza kahle kakhulu. Nazi ezinye izici eziphawulekayo ze-Xeon E5:
Ukusekelwa Kwememori ye-ECC
Imemori Yekhodi Yokulungisa Iphutha (ECC) ingenye yezici ezivelele ze-Xeon E5. Lesi sici sithola ngokuzenzakalelayo futhi silungise amaphutha enkumbulo, okubalulekile ezinhlelweni zokusebenza ezibalulekile lapho ukuphahlazeka kwesistimu noma ukonakala kwedatha kungenakubekezelelwa. Ukusekelwa kwenkumbulo ye-ECC kuqinisekisa ubuqotho bedatha futhi kufanele ube nakho ezindaweni zeseva nezindawo zokusebenza.
Multi-Socket Amakhono
Esinye sezici ezichazayo ze-Xeon E5 yikhono layo lokusekela ukucushwa kwe-multi-socket, okuvumela ama-processor amaningi ukuthi asebenze ndawonye ngaphakathi kwesistimu eyodwa. Lokhu kuthuthukisa ukukala, okwenza amaseva akwazi ukuphatha imithwalo yemisebenzi eyinkimbinkimbi nakakhulu ngokukhuphula ukusebenza ngamaphrosesa engeziwe. Lesi sici siwusizo ikakhulukazi kuzikhungo zedatha nasezindaweni ezidingeka kakhulu ezidinga ukucutshungulwa okufanayo.
I-Intel Turbo Boost ne-Advanced Power Management
Amaphrosesa we-Xeon E5 aphinde afake i-Intel Turbo Boost, ekhulisa ngokuzenzakalelayo isivinini sewashi lewashi lapho kudingeka, iqinisekise ukuthi uhlelo lusebenza kahle kakhulu ngesikhathi somthwalo osindayo. Ukwengeza, izici zokuphatha amandla zisiza ukuthuthukisa ukusetshenziswa kwamandla, ukuqinisekisa ukuthi isistimu isebenza kahle ngisho nangaphansi komthwalo.
Ukusekelwa kwe-AVX kanye Neminye Imiyalo
I-Intel Advanced Vector Extensions (AVX) ithuthukisa ukusebenza kwe-Xeon E5 yezinhlelo zokusebenza ezidinga amandla okuhlanganisa amaphuzu aphezulu antantayo, njengokulingisa kwesayensi nezinhlelo zokusebenza zobunjiniyela. Lezi zandiso zivumela iphrosesa ukuthi iphathe amaphuzu edatha amaningi ngokuhambisana, isheshisa imisebenzi ebingathatha isikhathi eside ezakhiweni ezindala.
B. Core i7 Architecture nezici
Iphrosesa ye-Intel Core i7, eklanyelwe ngokuyinhloko amadeskithophu abathengi namakhompyutha aphathekayo, igxile ekuletheni ukusebenza okuphezulu kwemidlalo, ukudala okuqukethwe, nokwenza imisebenzi eminingi. Izakhiwo zithuthukiselwe ukusebenza okusheshayo, okuwuchungechunge olulodwa nezici ezengeziwe ezihloselwe ukuthuthukisa ulwazi lomsebenzisi. Nazi izici ezibalulekile zezakhiwo ze-Core i7:
I-Integrated Graphics
Amamodeli amaningi e-Core i7 eza nezithombe ezihlanganisiwe, eziqeda isidingo sekhadi lemifanekiso elihlukile kumasistimu athile. Lokhu kunenzuzo ikakhulukazi kumasistimu okukhiqiza amageyimu nabezindaba lapho isikhala, ukusetshenziswa kwamandla, kanye nezindleko kukhathazeka. Imifanekiso ehlanganisiwe ingaphatha imidlalo eyisisekelo nokudlalwa kwevidiyo, nakuba i-GPU ezinikele isanconywa kumageyimu asezingeni eliphezulu.
I-Intel Turbo Boost Technology
Ngokufana ne-Xeon E5, i-Core i7 iphinde isekele i-Intel Turbo Boost. Lesi sici sinyusa isivinini sewashi lephrosesa, sivumela isistimu ukuthi inikeze ukusebenza okwengeziwe lapho kudingeka, ikakhulukazi ezinhlelweni zokusebenza ezinzima ezifana nokuhlela ividiyo nokunikezwa kwe-3D. I-Core i7 isebenzisa i-Turbo Boost ukulinganisela ukusebenza nokusebenza kahle kwamandla ngempumelelo.
Ubuchwepheshe be-Hyper-Threading
I-Core i7 isekela i-Hyper-Threading, ivumela umongo ngamunye ukuthi uphathe imicu emibili ngesikhathi esisodwa. Lokhu kusiza ukuthuthukisa ukusebenza kwemisebenzi enemicu eminingi efana nokwenza izinto eziningi, ukudalwa kwe-multimedia, nokulingisa okuyinkimbinkimbi. Kodwa-ke, ngama-cores ambalwa uma kuqhathaniswa ne-Xeon E5, i-Core i7 isebenza kahle kakhulu ezinhlelweni ezithembele ekusebenzeni okuphezulu kochungechunge olulodwa.
Overclocking Amakhono
Kwabashisekayo, amanye amamodeli e-Core i7 (isb., i-Core i7 K-series) asekela ukufakwa kwewashi okweqile, okuvumela abasebenzisi ukuthi bakhulise iwashi lewashi ngokusebenza okukhulu nakakhulu. Lesi sici silungele abadlali bamageyimu, abasakazi, nabadali bokuqukethwe abadinga konke ukusebenza kwezinhlelo zokusebenza zesikhathi sangempela.
| Isici | I-Intel Xeon E5 | I-Intel Core i7 |
| Ukusekelwa Kwememori ye-ECC | Yebo | Cha |
| Multi-Socket Amandla | Yebo | Cha |
| I-Integrated Graphics | Cha | Yebo (kuya ngemodeli) |
| I-Turbo Boost Technology | Yebo | Yebo |
| I-Hyper-Threading | Yebo | Yebo |
| I-Overclocking | Cha (ngaphandle kwamamodeli athile) | Yebo (amamodeli ochungechunge lwe-K) |
| Ukusekelwa kwe-AVX | Yebo | Ukwesekwa okukhawulelwe kwe-AVX |
5.Intengo Nokuqhathaniswa Kwenani
Uma ucubungula i-Intel Xeon E5 iqhathaniswa ne-Intel Core i7, intengo nenani kudlala indima ebalulekile ekunqumeni ukuthi iyiphi iphrosesa okufanele uyikhethe. Womabili amaphrosesa anikeza ukusebenza okuvelele, kodwa aqondise izimakethe ezihlukene futhi, ngenxa yalokho, eza ngamanani amanani ahlukene. Ake sihlukanise ukucatshangelwa kwentengo kanye nesiphakamiso senani ngakunye.
A. Intel Xeon E5 Ibanga lentengo
Ama-Intel Xeon E5 processors abekwe njengezixazululo ze-premium server-grade, eziklanyelwe izindawo zamabhizinisi, izikhungo zedatha, nezindawo zokusebenza ezisebenza kahle kakhulu. Ngenxa yezici zabo ezithuthukisiwe ezifana nokusekelwa kwenkumbulo ye-ECC, ukulungiselelwa okunamasokhethi amaningi, kanye nokuqina, amaphrosesa we-Xeon E5 avame ukubiza kakhulu kunozakwabo babathengi.
Ibanga lentengo: $300 kuya ku-$3,000+, kuye ngemodeli ethile, ukubala okuyisisekelo, nesizukulwane.
Inani Elingcono Kakhulu: Izinhlelo zokusebenza zamabhizinisi amakhulu, umthwalo wedatha osindayo, kanye nezindawo zokwenza izinto ezibonakalayo. Intengo ephezulu ivunyelwa ikhono lomprosesa lokusingatha imisebenzi enzima nokuqinisekisa ukwethembeka kwesistimu.
B. Intel Core i7 Ibanga Lamanani
I-Intel Core i7, ngenkathi ihlinzeka ngokusebenza okuhle, iqondiswe emakethe yabathengi, ikakhulukazi ama-PC amageyimu, ukuhlelwa kwevidiyo, namalaptop asebenza kahle kakhulu. I-Core i7 inikeza isilinganiso esingcono sentengo-kuya-kukusebenza kubasebenzisi bansuku zonke uma kuqhathaniswa ne-Xeon E5.
Ibanga Lamanani: $250 kuya ku-$500, kuye ngesizukulwane nezici ezithile (isb, amamodeli we-K-series for overclocking).
Ivelu Elingcono Kakhulu Lalo: Abathengi abadinga ukusebenza okuqinile kokudlala, ukudalwa kwemidiya, kanye nekhompuyutha yenjongo evamile ngaphandle kwethegi yentengo yeprimiyamu yamaphrosesa ebanga leseva. Ifaneleka kahle ikakhulukazi kubasebenzisi abangazidingi izici ezifana nememori ye-ECC noma usekelo olunamasokhethi amaningi.
| Isici | I-Intel Xeon E5 | I-Intel Core i7 |
| Inani | $300 kuya ku-$3,000+ | $250 kuya ku-$500 |
| Imakethe ehlosiwe | Ibhizinisi, Iziteshi Zokusebenza | Abathengi, Abathandi |
| Inani elingcono kakhulu le- | Izikhungo Zedatha, I-Virtualization | Amageyimu, Ukudalwa Kokuqukethwe |
6.Iyiphi Iphrosesa Elungele Izidingo Zakho?
Ukukhetha phakathi kwe-Intel Xeon E5 ne-Intel Core i7 ekugcineni kuncike ezidingweni zakho ezithile zokusebenzisa. Womabili amaphrosesa aletha ukusebenza okukhethekile, kodwa aklanyelwe izinhlobo ezahlukene zemithwalo yomsebenzi. Ngezansi izinto ezibalulekile ezingakusiza ukuthi unqume ukuthi iyiphi iphrosesa evumelana nezidingo zakho.
A. Intel Xeon E5: Ilungele Ibhizinisi Nomthwalo Onzima Womsebenzi
I-Intel Xeon E5 yakhelwe izimo zeseva, izikhungo zedatha, nezindawo zokusebenza ezidinga ukwethembeka okuphezulu, ukuqina, kanye nekhono lokusingatha imisebenzi edinga idatha. Uma usebenzisa isofthiwe ye-virtualization, ibamba imishini ye-virtual eminingi (ama-VM), noma icubungula idathasethi enkulu, i-Xeon E5 iyisinqumo esingcono ngenxa yamandla ayo anamasokhethi amaningi kanye nokusekelwa kwenkumbulo ye-ECC, okusiza ekuqinisekiseni ukuzinza kwesistimu nobuqotho bedatha.
Amacala Okusebenzisa Alungile we-Xeon E5:
I-High-performance Computing (HPC) yocwaningo noma yobunjiniyela
I-Virtualization kanye nezindawo zekhompuyutha yamafu
Imisebenzi yesikhungo sedatha lapho isikhathi nokuthembeka kubalulekile
Ukulingisa kwesayensi noma ukucubungula idatha enkulu
B. Intel Core i7: Ilungele Abathengi Nabasebenzisi Bamandla
I-Intel Core i7 yakhelwe abathanda kanye nabasebenzisi bamandla abadinga ukusebenza ngokushesha kwemidlalo, ukuhlela ividiyo, ukudala okuqukethwe, nokwenza imisebenzi eminingi. Ngezivinini eziphakeme zewashi nokusekelwa kwe-Hyper-Threading, i-Core i7 iphumelela kakhulu emisebenzini encike ekusebenzeni okucushwe olulodwa. Kuyisinqumo esihle kakhulu sabasebenzisi abadinga ukusebenza okuphendulayo kodwa abangadingi izici zebhizinisi ezithuthukisiwe ze-Xeon E5.
Izimo ezikahle zokusebenzisa i-Core i7:
Amageyimu nokusakaza lapho ukucubungula ngokushesha kubalulekile
Ukuhlela ividiyo nokunikezwa kwe-3D kochwepheshe bokudala
Ukwenza izinto eziningi nokudalwa kokuqukethwe ezinhlelweni zedeskithophu ezisebenza kahle kakhulu
Ikhompuyutha yenhloso evamile egxile esivinini
Isiphetho
- Khetha i- I-Intel Xeon E5 uma ukugxila kwakho ku imisebenzi yebhizinisi, ukwethembeka, futhi scalability.
- Khetha i- I-Intel Core i7 uma udinga ukusebenza okusheshayo okwe ukudlala, ukuhlela ividiyo, noma izicelo zokudala endaweni yentengo efinyeleleka kakhudlwana.
Ngokucabangela yakho izidingo ezithile futhi isabelomali, ungakhetha iphrosesa enikeza okungcono kakhulu inani ngokwezidingo zakho.
Ukuthi udinga ukusebenza okuphezulu 4u rackmount computer noma i-semi-rugged notebook yezimboni, qiniseka ukuthi ukhetha iphrosesa efana nokusebenza kwakho okuqondile nezidingo zebhajethi.
Ngokucabangela izidingo zakho ezithile kanye nesabelomali, ungakhetha iphrosesa enikeza inani elingcono kakhulu lezidingo zakho.
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