<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/78963738-cdc0-4c77-90ff-a963a5c3a780/C071E2A6-D543-4F50-93D8-58F0BB85A37A/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.databasecolumn.com/2008/01/mapreduce-a-major-step-back.html" href="http://www.databasecolumn.com/2008/01/mapreduce-a-major-step-back.html" style="font-size: 11px;">www.databasecolumn.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.databasecolumn.com/2008/01/mapreduce-a-major-step-back.html"><DIV class="asset-header"> <H1 class="asset-name">MapReduce: A major step backwards</H1> <DIV class="asset-meta"> <SPAN class="byline"> By David DeWitt on January 17, 2008 4:20 PM </SPAN> <SPAN class="separator">|</SPAN> <A href="http://www.databasecolumn.com/2008/01/mapreduce-a-major-step-back.html" class="permalink">Permalink</A> | <A href="http://www.databasecolumn.com/2008/01/mapreduce-a-major-step-back.html#comments">Comments (34)</A> | <A href="http://www.databasecolumn.com/2008/01/mapreduce-a-major-step-back.html#trackback">TrackBacks (1)</A> </DIV> </DIV></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.databasecolumn.com/2008/01/mapreduce-a-major-step-back.html"><DIV><B>In Summary</B></DIV></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.databasecolumn.com/2008/01/mapreduce-a-major-step-back.html"><DIV>It is exciting to see a much larger community engaged in the design and implementation of scalable query processing techniques. We, however, assert that they should not overlook the lessons of more than 40 years of database technology -- in particular the many advantages that a data model, physical and logical data independence, and a declarative query language, such as SQL, bring to the design, implementation, and maintenance of application programs. Moreover, computer science communities tend to be insular and do not read the literature of other communities. We would encourage the wider community to examine the parallel DBMS literature of the last 25 years. Last, before MapReduce can measure up to modern DBMSs, there is a large collection of unmet features and required tools that must be added.</DIV></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/C071E2A6-D543-4F50-93D8-58F0BB85A37A/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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