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v:ext="edit" spidmax="1027"/> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1"/> </o:shapelayout></xml><![endif]--> </head> <body bgcolor=white lang=EN-US style='tab-interval:.5in'> <div class=WordSection1> <p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:15.0pt;font-family:Calibri;mso-ascii-theme-font:major-latin; mso-fareast-font-family:"Times New Roman";mso-hansi-theme-font:major-latin; mso-bidi-font-family:"Times New Roman"'>CS 542 Distributed Database Systems</span></b><span style='font-size:15.0pt;font-family:Calibri;mso-ascii-theme-font:major-latin; mso-fareast-font-family:"Times New Roman";mso-hansi-theme-font:major-latin; mso-bidi-font-family:"Times New Roman"'> <br> <b>Prof. Bharat <span class=SpellE>Bhargava</span></b> <br> &nbsp; <o:p></o:p></span></p> <p align=center style='text-align:center'><b><span style='font-size:15.0pt; font-family:Calibri;mso-ascii-theme-font:major-latin;mso-hansi-theme-font:major-latin'>Assignment 1</span></b><span style='font-size:15.0pt;font-family:Calibri;mso-ascii-theme-font: major-latin;mso-hansi-theme-font:major-latin'> <br> <b>Due: January 17, 2013</b><o:p></o:p></span></p> <p align=center style='text-align:center'><b><span style='font-size:15.0pt; font-family:Calibri;mso-ascii-theme-font:major-latin;mso-hansi-theme-font:major-latin'>Written homework assignments are due at the start of class on the due date.</span></b><span style='font-size:15.0pt;font-family:Calibri;mso-ascii-theme-font:major-latin; mso-hansi-theme-font:major-latin'><o:p></o:p></span></p> <p style='margin-bottom:12.0pt'><span style='font-family:Calibri;mso-ascii-theme-font: major-latin;mso-hansi-theme-font:major-latin'><o:p>&nbsp;</o:p></span></p> <p><span style='font-size:12.0pt;font-family:Calibri;mso-ascii-theme-font:major-latin; mso-hansi-theme-font:major-latin'>Note: The points of every question are listed. Answer briefly. <o:p></o:p></span></p> <p><span style='font-size:12.0pt;font-family:Calibri;mso-ascii-theme-font:major-latin; mso-hansi-theme-font:major-latin'>Q1: Write one page summary of ideas in the three papers identifying the problem and the solution. (10 points) <br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Three papers are &quot;The Raid Distributed Database System&quot;, &quot;Concurrency Control in Database Systems&quot; and &quot;Building Distributed Database Systems&quot;. <o:p></o:p></span></p> <p><span style='font-size:12.0pt;font-family:Calibri;mso-ascii-theme-font:major-latin; mso-hansi-theme-font:major-latin'>Q2: What are the different performance criteria for evaluating concurrency control algorithms? (10 points) <o:p></o:p></span></p> <p><span style='font-size:12.0pt;font-family:Calibri;mso-ascii-theme-font:major-latin; mso-hansi-theme-font:major-latin'>Q3: Give examples of transaction executions that lead to (10 points) <br> <span class=GramE>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a</span>) lost update <br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) dirty read <o:p></o:p></span></p> <p><span style='font-size:12.0pt;font-family:Calibri;mso-ascii-theme-font:major-latin; mso-hansi-theme-font:major-latin'>Q4: What makes the problems in a distributed database system different (or complex) as compared to the problems in a single site system? (10 points) <o:p></o:p></span></p> <p><span style='font-size:12.0pt;font-family:Calibri;mso-ascii-theme-font:major-latin; mso-hansi-theme-font:major-latin'>Q5: Is there any sense in running a (10 points) <br> <span class=GramE>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a</span>) 'read only' transaction? <br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) '<span class=GramE>write</span> only' transaction? <o:p></o:p></span></p> <p><span style='font-size:12.0pt;font-family:Calibri;mso-ascii-theme-font:major-latin; mso-hansi-theme-font:major-latin'>Q6: Discuss the role of the following issues in distributed database system architecture: (10 points) <br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) autonomy <br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) heterogeneity <br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) scalability. <o:p></o:p></span></p> </div> </body> </html>