Modernização de software

A modernização de software ou de aplicações é uma prática corrente nas organizações, mas que nem sempre é assumida como tal. Os sistemas legados, ou legacy systems em Inglês, não têm que rodar em sistemas antigos, como o mainframe, isso é apenas uma parte do problema. [1].

Estratégias

Os projectos de modernização de aplicacional são geralmente projectos grandes e plurianuais. Por fazerem parte de sistemas críticos das empresas, a execução deste tipo de projecto tem um conjunto de riscos que têm impacto nas operações do negócio. A abordagem aparentemente mais comum é fazer modernizações incrementais. Em primeiro lugar, é frequente fazer apenas a substituição do sistema operativo (e do hardware), mantendo o código da aplicação inalterado. Após esta migração, pode dar-se continuidade à modernização de forma faseada, reduzindo progressivamente o código legado a favor do código convertido para a nova linguagem de programação. No final, o sistema estará totalmente convertido para a nova tecnologia, não devendo restar software com dependências de tecnologias legadas. A estratégia da migração é fundamental para determinar como é que o sistema continuará a suportar o negócio durante todo o esforço de migração e modernização [2].

A tomada de decisões neste domínio é um processo que ocorre num contexto organizacionl. As tomadas de decisão no "mundo real" das organizações comerciais têm que ser normalmente baseadas em "racionalidade limitada" (em Inglês Bounded_rationality) [3]. O princípio deste conceito é o balanceamenteo entre a informação disponível dentro e fora da organização, a capacidade cognitiva dos decisores e o tempo limite para a tomada de decisão.


Migração

A migração e/ou modernização das aplicações tem mais que ver com a actualização do software que é propriedade da organização, muitas vezes desenvolvido dentro de portas ao longo de vários anos e por diferentes programadores.

Podemos distinguir os seguintes casos:

  • A migração por mudança de plataforma (sistema operativo)
  • A conversão de uma linguagem de programação para outra
  • A desactivação de uma aplicação, mantendo imperativos de acesso aos dados
  • Reprogramação parcial ou total


A migração de software acontece frequentemente quando é preciso mudar de equipamento e de sistema operativo. Também se pode confundir com o acto de portar o código, que é a designação usada em ciências de computação para o processo de converter o código de um sistema operativo para outro. Acontece que, na generalidade dos projectos de migração, é necessário construir na nova plataforma as funcionalidades que a aplicação usava na antiga, como, por exemplo o sub-sistema de impressão ou o acesso à base de dados.

No caso das migrações de mainframe, VMS e Wang, continua a ser escolhida a opção de emulação. Há produtos no mercado que permitem que as aplicações acreditem que têm o mesmo sistema funcional do mainframe, como sejam as chamadas CICS e o processamento por lotes em JCL. É o caso do produto da empresa Clerity e haverá outros.


Referências

  1. ↑ Gardner, D: "Not just a nip and tuck, application modernization extends the lifecycle of legacy code assets”, [1] ZDNet, October 24, 2006
  2. ↑ Uma Abordagem para Migração Gradativa de Aplicações Legadas
  3. ↑ Simon’s Bounded Rationality. Origins and use in Economic Theory

Read other articles:

Big E Langston

Big EBig E di bulan Maret 2015Nama lahirEttore Ewen[1]Lahir1 Maret 1986 (umur 38)[2]Tampa, Florida,Amerika Serikat[2]Alma materUniversity of IowaKarier gulat profesionalNama ringBig E[3]Big E Langston[1][4]Biggie Langston[1]Ettore Ewen[1]William Langston[1]Tinggi5 ft 11 in (1,80 m)[5]Berat285 pon (129 kg)[5]Asal dariTampa, Florida[5]Dilatih olehFlorida Championship Wre...

 

Gabbar Singh (film)

Gabbar SinghPoster filmSutradaraHarish ShankarProduserBandla GaneshSkenarioSatish VegesnaRamesh Reddy[1]CeritaAbhinav KashyapDilip ShuklaPemeranPawan KalyanShruti HaasanPenata musikDevi Sri PrasadSinematograferJayanan VincentPenyuntingGautham RajuPerusahaanproduksiParameswara Art ProductionsTanggal rilis 11 Mei 2012 (2012-05-11)[2] Durasi152 menitNegaraIndiaBahasaTeluguAnggaran₹30 crore [3]Pendapatankotor₹68 crore[4]Gabbar Singh adalah sebuah fil...

 

Frederik Ndoci

Ndoci op het Eurovisiesongfestival van 2007 Frederik Ndoci (Shkodër, 9 februari 1960) is een Albanees zanger. In 1989 won hij de 28ste editie van het Festivali i këngës, een Albanees muziekfestival, met het lied Toka e diellit. In 2006 won hij opnieuw, dit keer aan de zijde van zijn vrouw Aida met het lied Balada e Gurrit. Sinds 2003 is het festival een voorronde van het Eurovisiesongfestival en Frederik en Aida vertegenwoordigden Albanië dan ook op het Eurovisiesongfestival 2007 in Helsi...

Masjid Ferhat Pasha

Masjid Ferhat PashaMasjid FerhadijaAgamaAfiliasiIslam SunniLokasiLokasiBanja Luka, Bosnia dan HerzegovinaKoordinat44°46′02.69″N 17°11′14.44″E / 44.7674139°N 17.1873444°E / 44.7674139; 17.1873444Koordinat: 44°46′02.69″N 17°11′14.44″E / 44.7674139°N 17.1873444°E / 44.7674139; 17.1873444ArsitekturTipeMasjidGaya arsitekturUtsmaniRampung1579SpesifikasiKubah1Menara1Tinggi menara41, 65 m [1] Masjid Ferhat Pasha (bahasa B...

 

Song for the Basilisk

1998 book by Patricia A. McKillip Song for the Basilisk First edition coverAuthorPatricia A. McKillipCover artistKinuko Y. CraftCountryUnited StatesLanguageEnglishGenreFantasyPublisherAce BooksPublication dateSeptember 1, 1998Media typePrintPages314ISBN0-441-00447-4OCLC987642215 Song for the Basilisk is a 1998 fantasy novel by American writer Patricia A. McKillip. It was a Mythopoeic Fantasy Award for Adult Literature finalist in 1999.[1] Summary The sole survivor of a massa...

 

دونالد إل. كاتس

دونالد إل. كاتس معلومات شخصية الميلاد سنة 1907  مقاطعة جاكسون  تاريخ الوفاة 29 مايو 1989 (81–82 سنة)  مواطنة الولايات المتحدة  عضو في الأكاديمية الوطنية للهندسة  الحياة العملية المدرسة الأم جامعة ميشيغان  المهنة كيميائي،  ومهندس  موظف في جامعة ميشيغان  ال...

MetLife Building

Office skyscraper in Manhattan, New York This article is about the building at 200 Park Avenue in Midtown Manhattan. For the buildings near Madison Square Park, see Metropolitan Life Insurance Company Tower and Metropolitan Life North Building. For the building at 200 Park Avenue South, see Everett Building (Manhattan). MetLife BuildingSeen from the south in 2005Former namesPan Am BuildingGeneral informationTypeOfficeArchitectural styleInternationalLocation200 Park AvenueManhattan, New York 1...

 

Music of Liberia

This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This article possibly contains original research. Please improve it by verifying the claims made and adding inline citations. Statements consisting only of original research should be removed. (January 2017) (Learn how and when to remove this template message) This article needs additional citations for verification. Please help improve thi...

 

Eusebio Di Francesco

Italian football manager (born 1969) Eusebio Di Francesco Di Francesco managing Roma in 2018Personal informationFull name Eusebio Di Francesco[1]Date of birth (1969-09-08) 8 September 1969 (age 54)Place of birth Pescara, ItalyHeight 1.78 m (5 ft 10 in)Position(s) MidfielderTeam informationCurrent team Frosinone (manager)Senior career*Years Team Apps (Gls)1987–1991 Empoli 102 (3)1991–1995 Lucchese 139 (12)1995–1997 Piacenza 67 (5)1997–2001 Roma 101 (14)2001�...

جمهورية العمال الفنلندية الاشتراكية

يفتقر محتوى هذه المقالة إلى الاستشهاد بمصادر. فضلاً، ساهم في تطوير هذه المقالة من خلال إضافة مصادر موثوق بها. أي معلومات غير موثقة يمكن التشكيك بها وإزالتها. (فبراير 2016)   جمهورية العمال الفنلندية الاشتراكية جمهورية العمال الفنلندية الاشتراكيةالعلم جمهورية العمال الفنل...

 

土库曼斯坦总统

土库曼斯坦总统土库曼斯坦国徽土库曼斯坦总统旗現任谢尔达尔·别尔德穆哈梅多夫自2022年3月19日官邸阿什哈巴德总统府（Oguzkhan Presidential Palace）機關所在地阿什哈巴德任命者直接选举任期7年，可连选连任首任萨帕尔穆拉特·尼亚佐夫设立1991年10月27日 土库曼斯坦土库曼斯坦政府与政治 国家政府 土库曼斯坦宪法 国旗 国徽 国歌 立法機關（英语：National Council of Turkmenistan） ...

 

莎拉·阿什頓-西里洛

莎拉·阿什頓-西里洛2023年8月，阿什頓-西里洛穿著軍服出生 (1977-07-09) 1977年7月9日（46歲） 美國佛羅里達州国籍 美國别名莎拉·阿什頓（Sarah Ashton）莎拉·西里洛（Sarah Cirillo）金髮女郎（Blonde）职业記者、活動家、政治活動家和候選人、軍醫活跃时期2020年—雇主內華達州共和黨候選人（2020年）《Political.tips》（2020年—）《LGBTQ國度》（2022年3月—2022年10月）烏克蘭媒�...

Taki's Magazine

Political online magazine Taki's redirects here. For the snack food, see Takis (snack). Taki's MagazineAvailable inEnglishHeadquartersUnited StatesOwnerTaki TheodoracopulosEditorMandolyna TheodoracopulosURLwww.takimag.com Launched5 February 2007Current statusactive This article is part of a series onConservatismin the United States Schools Compassionate Fiscal Fusion Libertarian Moderate Movement Neo Paleo Progressive Social Traditionalist Principles American exceptionalism Anti-com...

 

Durham, New Hampshire

Town in New Hampshire, United States Not to be confused with New Durham, New Hampshire. Town in New Hampshire, United StatesDurham, New HampshireTownThompson Hall on the University of New Hampshire campus SealLocation within Strafford County, New HampshireCoordinates: 43°08′02″N 70°55′35″W / 43.13389°N 70.92639°W / 43.13389; -70.92639CountryUnited StatesStateNew HampshireCountyStraffordSettled1635Incorporated1732Government • Town Council Members...

 

The Girl from Nowhere (2012 film)

2012 film by Jean-Claude Brisseau The Girl from NowhereTheatrical release posterFrenchLa Fille de nulle part Directed byJean-Claude BrisseauWritten byJean-Claude BrisseauProduced byJean-Claude BrisseauStarring Virginie Legeay Claude Morel Jean-Claude Brisseau Lise Bellynck Sébastien Bailly Anne Berry Emmanuel Noblet CinematographyDavid ChambilleEdited byMaría Luisa GarcíaProductioncompanyLa Sorcière RougeDistributed byLes AcaciasRelease dates 8 August 2012 (2012-08-08) ...

New Hampshire Indy 225

New Hampshire Indy 225IndyCar SeriesTempatNew Hampshire Motor SpeedwayLomba pertama1992Lomba pertamaICS1996Lomba terakhir2011Jarak tempuh23.805 mi (38.310 km)Jumlah putaran225Nama sebelumnyaNew England 200 (1992-1993, 1995)Slick-50 200 (1994)True Value 200 (1996)Pennzoil 200 (1997) New England Indy 200 (1998) MoveThatBlock.com Indy 225 (2011)Terbanyak menang(pengemudi)no repeat winnersTerbanyak menang(tim)Team Menard (2) New Hampshire Indy 225 adalah sebuah balapan Seri IndyCar di N...

 

USS Montgomery County

USS Montgomery County (LST-1041) moored at Little Creek Amphibious Base, Virginia, 1951 History United States NameUSS LST-1041 BuilderDravo Corporation, Pittsburgh Laid down12 November 1944 Launched20 January 1945 Commissioned19 February 1945 Decommissioned31 January 1956 RenamedUSS Montgomery County (LST-1041), 1 July 1955 Stricken1 June 1960 Fate Sold to West Germany, August 1961 Scrapped, 1968 General characteristics Class and typeLST-542-class tank landing ship Displacement 1,625 long to...

 

Kanaka (actress)

Indian actress (born 1973) KanakaBornKanaka DevadasOccupationActressYears active1989–2006ParentDevika (mother)RelativesRaghupathi Venkaiah Naidu (great-grandfather)Pranika (cousin) Kanaka is an Indian former actress who mainly appeared in Tamil and Malayalam language films and few Telugu language films. She is known of her role in her debut Tamil film Karakaatakkaaran (1989). Personal life Kanaka is the daughter of actress Devika.[1][2] She is also the great-granddaught...

Jeongyeon

South Korean singer (born 1996) In this Korean name, the family name is Yoo. JeongyeonJeongyeon in 2023BornYoo Kyung-wan[1] (1996-11-01) 1 November 1996 (age 27)Suwon, Gyeonggi, South KoreaOccupationSingerRelativesGong Seung-yeon (sister)Musical careerGenresK-popJ-popInstrument(s)VocalsYears active2015–presentLabelsJYPWarner JapanRepublicMember ofTwiceJYP Nation Musical artistKorean nameHangul유정연Hanja俞定延Revised RomanizationYu Jeong-yeonMcCune–ReischauerYu Chŏngy�...

 

Dalatiidae

Family of sharks DalatiidaeTemporal range: Paleogene-Recent, 61.6–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N [1] Kitefin shark, Dalatias licha Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Subclass: Elasmobranchii Subdivision: Selachimorpha Order: Squaliformes Family: DalatiidaeJ. E. Gray, 1851 Type species Squalus lichaBonnaterre, 1788 Diversity Eight genera, 13 species, See text. The Dalatiidae are the family of kitefin sharks ...