B?c em, ?ng h? l? m?t chuy?n c? c?i t?m l? t?t qu? nh?ng m? m?nh c?ng c?n th?m s? ??nh gi? v? l?a ch?n c?a m?nh. Em nh? ??n c? l?n em nh?n th?y c? b?n d?ch... vBulletin, em ngh? l? t?i sao ph?i m?t c?ng d?ch l?i vBulletin thay v? d?ch phpBB v? nh? th? l? m?nh t? d?ng l?m m?t vi?c ch?ng c? l?i m?y chom?i ng??i, n?u kh?ng n?i l? l?m cho ng??i kh?c l?a ch?n vBulletin. M?nh c?ng v?y th?i vi?c b?c ch?n d?ch v? ??a tin g? n?u c? c?c ngu?n tin tin c?y, kh?ch quan v? ch?t l??ng th? kh?ng nh?ng l?m cho ng??i kh?c c? c?ch nh?n ??ng v? chu?n x?c, m? c?n gi?p ti?ng n?i c?a m?nh c? tr?ng l??ng n?a. V?y n?n em ngh? vi?c d?ch ?? n?u c? nh?ng ngu?n tin c? ch?t l??ng nh? t? DeveloperWorks ho?c Google thay v? t? nh?ng blog ch?a ??ng tin c?y (b?c ?? ? c?c comments t? b?i blog m? b?c d?ch th? s? th?y ch? y?u l? ? ki?n kh?ng t?n th?nh), th? t? nhi?n m?nh l?m ???c m?t c?ng m? ??i vi?c, ?? l? v?a c? v? ngu?n m?, l?i v?a ??a th?gn tin h?u ?ch v? ch?nh x?c h?n.
Ch?c b?c cu?i tu?n vui v? v? c?ng c? th?m nhi?u tin cho ch?ng em, - Hu?n. 2008/9/12 Nghia Le Trung <letrungnghia.foss at gmail.com>: > Ch?o Hu?n Tr??ng, > T?i kh?ng c? ? ?? di?t cho ai c?i g?, t?c gi? b?i b?o vi?t th? n?o, m?nh c? > tr?ch nhi?m d?ch l?i nguy?n v?n nh? v?y. C?n vi?c c?c nh? chuy?n m?n tranh > c?i nhau gi?a 2 th? ?y nh? th? n?o tr?n th?c t? l?i kh?ng ph?i vi?c c?a t?i > ?? truy?n ??t. N?u l?m kh?c ?i, kh?ng c? l? t?i s? ph?i d?ch kh?c v?i nh?ng > g? ???c t?c gi? vi?t ra sao? > V? th?, t?i ch? c? th? tr? l?i c?u h?i c?a b?n l? b?i vi?t t?i d?ch n? n?i > nh? v?y m? th?i. > Nh?n v? chuy?n so s?nh gi?a MySQL hay MS SQL t?t h?n, t?i ngh? c?n so s?nh > t?ng ch?c n?ng, v? quan tr?ng h?n c?, v?i b?i to?n c? th? c?a th? tr??ng > ch?ng kho?n th? t?nh n?ng g? l? c?n nh?t. Trong tr??ng h?p n?y, c? th? nh?ng > t?nh n?ng m? MS SQL t?t h?n nh?ng l?i kh?ng n?m trong l?a ch?n ?u ti?n ??i > v?i th? tr??ng ch?ng kho?n ch?ng? ?? ch? l? gi? thi?t c?a c? nh?n t?i, c?n > vi?c ??nh gi? v? vi?c ch?n th? thu?c v? tr?ch nhi?m c?a nh?ng ng??i l?m k? > thu?t, cho d?, n?u theo b?i vi?t, t?i th?y t?c gi? nh? mu?n nh?n m?nh t?nh > n?ng v? performance c?a DBMS, m? v? t?nh n?ng n?y th? MS SQL Server ch?a > ch?c ?? b?ng v?i MySQL > (http://www.tometasoftware.com/MySQL-5-vs-Microsoft-SQL-Server-2005.asp). > T?i c?n cho r?ng, t?c gi? b?i vi?t kh?ng ch? ??a ra l?a ch?n v? MySQL, m? > c?n c? Oracle, DB2 n?a, v? nh?ng th? n?y th? ch?c l? kh?ng sai ??i v?i th? > tr??ng ch?ng kho?n. > Cu?i c?ng, v?i c?ng vi?c d?ch b?i h?ng ng?y nh? t?i ?ang l?m hi?n gi?, th? > quan tr?ng h?n c?, l? d?ch t?i li?u nguy?n v?n m?t c?ch t?t nh?t c? th? > ???c. > M?t v?i d?ng chia s?. > Ch?c b?n vui v? cu?i tu?n > L? Trung Ngh?a > > 2008/9/13 Huan Truong <hnt7438 at truman.edu> >> >> B?c Ngh?a, >> >> >> > "The programmers and serious database administrators in the audience can >> > already see where this is going. Sorry, Microsoft, .NET Framework is >> > simply >> > incapable of performing this kind of work, and SQL Server 2000, or any >> > version of SQL Server really, can't possibly handle the world's number >> > three >> > stock exchange's transaction load on a consistent basis. >> >> Nasdaq runs SQL Server. What's your point? >> >> http://blog.sqlauthority.com/2007/09/17/sqlauthority-news-nasdaq-uses-sql-server-2005-reducing-costs-through-better-data-management/ >> >> >> "Developers of large-scale systems do not rely on the speed >> differences between languages or databases - the speed and scalability >> are built into the systems design. >> >> Most developers do not have experience with applications of this scale. >> >> Here is a great example: The Yahoo! user database (which was probably >> the largest user database at one time) was developed by computer >> scientists from rdbms companies like Informix and Oracle. When they >> designed the Yahoo! database, which rdbms server did they choose? >> None. It was implemented as a **flat-file database**. If you >> understand why, then you are likely familiar with the nuances and >> specificity of different types of data needs and how they are best >> addressed on VLS systems. No one knows enough information about this >> specific case to say whether is was an error with the database, >> language, OS, or applications software, but I suspect the latter." - >> http://digg.com/linux_unix/London_Stock_Exchange_suffers_NET_Crash >> >> ?? l? m?t l?i logic: A s? d?ng B, A kh?ng ho?t ??ng ??ng v?y B y?u. >> >> Vi?c "?? di?t" cho MS v? .NET l? m?t chuy?n kh?ng n?n n?u m?nh ch?a >> hi?u r? nguy?n nh?n t?i sao. >> >> - H. >> >> 2008/9/12 Nghia Le Trung <letrungnghia.foss at gmail.com>: >> > Ch?o b?n Hu?n Tr??ng, >> > ??y l? c?c tr?ch d?n: >> > >> > I'd been hearing from friends who trade on the LSE for ages about how >> > slow >> > the system could get. Now, I know why. >> > >> > What I find really amazing is that the LSE's software stack hadn't blown >> > its >> > top earlier. Even setting aside my feelings for Linux, there's simply no >> > way >> > I'd recommend Server 2003, .NET and SQL Server for a job even a tenth >> > this >> > size. If a customer of mine insisted that they didn't want open source - >> > more fool them - I'd recommended Sun Solaris, JEE (Java Enterprise >> > Edition) >> > and Oracle or IBM AIX or z/OS, WebSphere and DB2. >> > >> > What I'd really prefer to see is RHEL (Red Hat Enterprise Linux), JBoss, >> > and >> > MySQL or Oracle or Novell's SLES (SUSE Linux Enterprise Server), JEE, >> > and, >> > again MySQL or Oracle for the DBMS engine. In any case, though, the real >> > moral of this story is that if you really want HA (high availability) or >> > HPC >> > (high performance computing), Microsoft's products should be at the >> > bottom >> > of your list. Unix, mainframes, and, yes Linux, are far, far better for >> > companies that need fast and reliable computing. >> > >> > You don't have to believe me though. The New York Stock Exchange has >> > already >> > started to use Linux on its servers." >> > >> > Source: >> > http://blogs.computerworld.com/london_stock_exchange_suffers_net_crash >> > L? Trung Ngh?a >> > >> > 2008/9/12 Huan Truong <hnt7438 at truman.edu> >> >> >> >> Tai sao bac Nghia lai nghi rang tai vi dung .NET cho nen no moi sap - >> >> chung ta dau co bang chung gi ve viec nay? >> >> >> >> "A network software problem was behind Monday's disastrous system >> >> crash at the London Stock Exchange. But the LSE said it would not >> >> point the finger of blame at Accenture, which built its crucial >> >> TradElect platform. It said TradElect was not at the source of the >> >> problem." >> >> >> >> Source: >> >> >> >> http://www.computerworlduk.com/management/infrastructure/networks/news/index.cfm?newsid=10912 >> >> >> >> Viec ung ho phan mem nguon mo la tot nhung nen "give credit where >> >> credit is due." Chuyen khuyen dung MySQL... khong phai la mot "loi >> >> khuyen" trong truong hop nay. >> >> >> >> - Huan. >> >> >> >> 2008/9/10 Nghia Le Trung <letrungnghia.foss at gmail.com>: >> >> > K?nh g?i c?c anh ch? th?ng tin m?i ng?y 11/09/08 >> >> > 1. Th? tr??ng ch?ng kho?n London b? thi?t h?i v? .NET >> >> > >> >> > Tr?n Blog n?y ?? t?ng ??a tin v? vi?c h? th?ng th?ng tin c?a c?c th? >> >> > tr??ng >> >> > ch?ng kho?n s? 1 v? s? 2 th? gi?i l? New York v? Tokyo ??u d?a tr?n >> >> > Linux, >> >> > c?n b?i vi?t n?y l? v? th? tr??ng ch?ng kho?n ???c x?p h?ng ? v? tr? >> >> > th? >> >> > 3, >> >> > n?i ?ang s? h?u m?t h? th?ng th?ng tin d?a tr?n c?c s?n ph?m c?a >> >> > Microsoft >> >> > nh? Windows Server 2003, MS SQL Server, c?ng ngh? .NET v? ng?n ng? >> >> > l?p >> >> > tr?nh >> >> > C#. H?y xem t?c gi? vi?t g? v? ch?ng: "Xin l?i, Microsoft, khung c?ng >> >> > vi?c >> >> > .NET (.NET Framework) ??n gi?n l? kh?ng c? kh? n?ng th?c thi ???c >> >> > d?ng >> >> > c?ng >> >> > vi?c nh? th? n?y [c?a th? tr??ng ch?ng kho?n], v? SQL Server 2000, >> >> > ho?c >> >> > th?c >> >> > s? b?t k? phi?n b?n n?o c?a SQL Server, c?ng kh?ng th? c? kh? n?ng >> >> > ?i?u >> >> > khi?n ???c t?i giao d?ch c?a c?i th? tr??ng ch?ng kho?n ??ng h?ng th? >> >> > 3 >> >> > tr?n >> >> > th? gi?i n?y m?t c?ch ?n ??nh". "Ngay c? vi?c b? qua nh?ng c?m t??ng >> >> > c?a >> >> > t?i >> >> > v? Linux, ??n gi?n s? kh?ng bao gi? t?i l?i khuy?n c?o (Microsoft) >> >> > Server >> >> > 2003, .NET v? SQL Server cho m?t c?ng vi?c ngay c? ch? b?ng 1/9 k?ch >> >> > c? >> >> > nh? >> >> > th? n?y. N?u m?t kh?ch h?ng c?a t?i kh?ng kh?ng r?ng h? ?? kh?ng mu?n >> >> > ngu?n >> >> > m? ? l?a ph?nh h? nhi?u h?n ? t?i c? l? ?? khuy?n c?o Sun Solaris, >> >> > JEE >> >> > (Java >> >> > Enterprise Edition) v? Oracle ho?c IBM AIX ho?c z/OS, WebSphere v? >> >> > DB2". >> >> > "Nh?ng g? t?i th?c s? ?u ti?n nh?n th?y l? RHEL (Red Hat Enterprise >> >> > Linux), >> >> > JBoss, v? MySQL ho?c Oracle ho?c SLES (SuSE Linux Enterprise Server) >> >> > c?a >> >> > Novell, JEE, v?, m?t l?n n?a MySQL ho?c Oracle cho m?y h? qu?n tr? c? >> >> > s? >> >> > d? >> >> > li?u - DBMS (Database Management System). Trong m?i tr??ng h?p, tuy >> >> > v?y, >> >> > ??o >> >> > ??c th?c t? c?a c?u chuy?n n?y l? n?u b?n th?c s? mu?n c? m?t h? >> >> > th?ng >> >> > c? ?? >> >> > s?n s?ng cao ? HA, ho?c h? th?ng m?y t?nh hi?u n?ng cao ? HPC (high >> >> > performance computing), th? c?c s?n ph?m c?a Microsoft ph?i ? d??i >> >> > ??y >> >> > danh >> >> > s?ch c?a b?n. Unix, c?c m?y ch? l?n mainframes, v?, v?ng Linux, l? >> >> > t?t >> >> > h?n, >> >> > t?t h?n nhi?u cho c?c c?ng ty c?n h? th?ng m?y t?nh nhanh v? ??ng tin >> >> > c?y". >> >> > >> >> > 2. Dell ??t Linux v? Atom v?o trong Vostro PC cho c?c th? tr??ng ?ang >> >> > n?i >> >> > l?n: >> >> > >> >> > B?y gi? th? Dell kh?ng ch? xu?t c?c m?y t?nh c?i s?n h? ?i?u h?nh >> >> > GNU/Linux >> >> > Ubuntu cho th? tr??ng B?c M? v? ch?u ?u n?a, m? ?? m? r?ng ra to?n >> >> > c?u, >> >> > nh?ng l?n n?y ch? y?u s? d?ng c?c b? vi x? l? s? d?ng n?ng l??ng th?p >> >> > Atom >> >> > c?a Intel. >> >> > >> >> > Xem th?ng tin t?i: http://360.yahoo.com/ltnghia >> >> > >> >> > H?n h?n ???c ph?c v? >> >> > L? Trung Ngh?a >> >> > >> >> > PS: C?c anh ch? n?u kh?ng c? mong mu?n nh?n tin, xin g?i tr? v? ??a >> >> > ch? >> >> > th? >> >> > n?y v?i d?ng: >> >> > "Y?u c?u xo? kh?i danh s?ch th? ??a ch? th? n?y" >> >> > _______________________________________________ >> >> > HanoiLUG mailing lists: http://lists.hanoilug.org/ >> >> > HanoiLUG wiki: http://wiki.hanoilug.org/ >> >> > HanoiLUG blog: http://blog.hanoilug.org/ >> >> > >> >> >> >> >> >> >> >> -- >> >> Huan Truong ? http://tnhh.info ? 1-660-349-8508 >> >> _______________________________________________ >> >> HanoiLUG mailing lists: http://lists.hanoilug.org/ >> >> HanoiLUG wiki: http://wiki.hanoilug.org/ >> >> HanoiLUG blog: http://blog.hanoilug.org/ >> > >> > _______________________________________________ >> > HanoiLUG mailing lists: http://lists.hanoilug.org/ >> > HanoiLUG wiki: http://wiki.hanoilug.org/ >> > HanoiLUG blog: http://blog.hanoilug.org/ >> > >> >> >> >> -- >> Huan Truong ? http://tnhh.info ? 1-660-349-8508 >> _______________________________________________ >> HanoiLUG mailing lists: http://lists.hanoilug.org/ >> HanoiLUG wiki: http://wiki.hanoilug.org/ >> HanoiLUG blog: http://blog.hanoilug.org/ > > _______________________________________________ > HanoiLUG mailing lists: http://lists.hanoilug.org/ > HanoiLUG wiki: http://wiki.hanoilug.org/ > HanoiLUG blog: http://blog.hanoilug.org/ > -- Huan Truong ? http://tnhh.info ? 1-660-349-8508
