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dimecres, 17 / gener / 2007 |
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La nova versió de l'Outlook inclosa a l'Office 2007 té una diferència significativa respecte a qualsevol versió anterior: no fa servir el motor de l'IE per a presentar el contingut HTML, sinó que s'utilitza l'editor del Word 2007. S'explica a Microsoft takes email design back 5 years. A nivell de funcionalitat es perden algunes funcions com les imatges de fons... però es guanya en seguretat.
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  | 16:19 (# Enllaç permanent) | Comentaris: | Trackback:
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Sempre xalo llegint aquests articles sobre la infraestructura que hi ha al darrera de les grans webs: Inside MySpace.com
MySpace started small, with two Web servers talking to a single database server. Originally, they were 2-processor Dell servers loaded with 4 gigabytes of memory
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In the second-generation architecture, MySpace ran on three SQL Server databases—one designated as the master copy to which all new data would be posted and then replicated to the other two, which would concentrate on retrieving data to be displayed on blog and profile pages. This also worked well—for a while—with the addition of more database servers and bigger hard disks to keep up with the continued growth in member accounts and the volume of data being posted.
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The next database architecture was built around the concept of vertical partitioning, with separate databases for parts of the Web site that served different functions such as the log-in screen, user profiles and blogs. Again, the Web site's scalability problems seemed to have been solved—for a while.
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So, MySpace moved to a distributed computing architecture in which many physically separate computer servers were made to function like one logical computer. At the database level, this meant reversing the decision to segment the Web site into multiple applications supported by separate databases, and instead treat the whole Web site as one application. Now there would only be one user table in that database schema because the data to support blogs, profiles and other core features would be stored together.
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When MySpace hit 10 million accounts, it began to see storage bottlenecks again
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In mid-2005, when the service reached 26 million accounts, MySpace switched to SQL Server 2005 while the new edition of Microsoft's database software was still in beta testing
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problem is that MySpace is pushing Microsoft's Web technologies into territory that only Microsoft itself has begun to explore, Benedetto says. As of November, MySpace was exceeding the number of simultaneous connections supported by SQL Server, causing the software to crash.
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| 01:43 (# Enllaç permanent) | Comentaris: | Trackback:
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An Introduction to SQL Injection Attacks for Oracle Developers. Relativament antic (última actualització el febrer del 2004), però la millor referència sobre els atacs d'injecció SQL
Most application developers underestimate the risk of SQL injections attacks against web applications that use Oracle as the back-end database. Our audits of custom web applications show many application developers do not fully understand the risk of SQL injection attacks and simple techniques used to prevent such attacks.
This paper is intended for application developers, database administrators, and application auditors to highlight the risk of SQL injection attacks and demonstrate why web applications may be vulnerable. It is not intended to be a tutorial on executing SQL attacks and does not provide instructions on executing these attacks.
Lectura *obligada*.
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| 01:02 (# Enllaç permanent) | Comentaris: | Trackback:
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© Copyright 1996-2007 Xavier Caballe.  . Si no s'indica expressament el contrari, el material publicat en aquest weblog es distribueix d'acord amb la llicència Creative Commons. El contingut és responsabilitat única i exclusivament del seu autor i no té cap relació amb les seves activitats professionals.
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