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	<title>Comments on: H-Store is now VoltDB</title>
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	<link>http://www.dbms2.com/2009/06/22/h-store-horizontica-voltdb/</link>
	<description>Choices in data management and analysis</description>
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		<title>By: Clustrix may be doing something interesting &#124; DBMS2 -- DataBase Management System Services</title>
		<link>http://www.dbms2.com/2009/06/22/h-store-horizontica-voltdb/#comment-169379</link>
		<dc:creator>Clustrix may be doing something interesting &#124; DBMS2 -- DataBase Management System Services</dc:creator>
		<pubDate>Thu, 20 May 2010 23:36:40 +0000</pubDate>
		<guid isPermaLink="false">http://www.dbms2.com/?p=818#comment-169379</guid>
		<description>[...] Akiban or VoltDB, Clustrix makes database appliances. The Clustrix software seems to assume a Clustrix [...]</description>
		<content:encoded><![CDATA[<p>[...] Akiban or VoltDB, Clustrix makes database appliances. The Clustrix software seems to assume a Clustrix [...]</p>
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		<title>By: Notes on the evolution of OLTP database management systems &#124; DBMS2 -- DataBase Management System Services</title>
		<link>http://www.dbms2.com/2009/06/22/h-store-horizontica-voltdb/#comment-164713</link>
		<dc:creator>Notes on the evolution of OLTP database management systems &#124; DBMS2 -- DataBase Management System Services</dc:creator>
		<pubDate>Tue, 06 Apr 2010 04:20:55 +0000</pubDate>
		<guid isPermaLink="false">http://www.dbms2.com/?p=818#comment-164713</guid>
		<description>[...] VoltDB is the main exception that jumps to mind. [...]</description>
		<content:encoded><![CDATA[<p>[...] VoltDB is the main exception that jumps to mind. [...]</p>
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		<title>By: NoSQL? &#124; DBMS2 -- DataBase Management System Services</title>
		<link>http://www.dbms2.com/2009/06/22/h-store-horizontica-voltdb/#comment-152422</link>
		<dc:creator>NoSQL? &#124; DBMS2 -- DataBase Management System Services</dc:creator>
		<pubDate>Sat, 12 Dec 2009 04:20:29 +0000</pubDate>
		<guid isPermaLink="false">http://www.dbms2.com/?p=818#comment-152422</guid>
		<description>[...] often-unspecified &#8212; &#8220;overhead&#8221; are interesting to view through the lens of the H-Store/VoltDB project. Mike Stonebraker et [...]</description>
		<content:encoded><![CDATA[<p>[...] often-unspecified &#8212; &#8220;overhead&#8221; are interesting to view through the lens of the H-Store/VoltDB project. Mike Stonebraker et [...]</p>
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		<title>By: Jags Ramnarayan</title>
		<link>http://www.dbms2.com/2009/06/22/h-store-horizontica-voltdb/#comment-137369</link>
		<dc:creator>Jags Ramnarayan</dc:creator>
		<pubDate>Sun, 30 Aug 2009 23:10:45 +0000</pubDate>
		<guid isPermaLink="false">http://www.dbms2.com/?p=818#comment-137369</guid>
		<description>Scale out OLTP products has been around for a while as &quot;object&quot; data management products, extensively used in trading environments (where VoltDB is positioned) offering memory only storage, variety of replication, partitioning strategies and varying levels of concurrency control, all designed to tackle the high scale and reliability problem for OLTP data. GemStone recently announced a SQL centric horizontally partitioned memory oriented product called GemFire SQLFabric (http://community.gemstone.com/display/sqlfabric/SQLFabric).</description>
		<content:encoded><![CDATA[<p>Scale out OLTP products has been around for a while as &#8220;object&#8221; data management products, extensively used in trading environments (where VoltDB is positioned) offering memory only storage, variety of replication, partitioning strategies and varying levels of concurrency control, all designed to tackle the high scale and reliability problem for OLTP data. GemStone recently announced a SQL centric horizontally partitioned memory oriented product called GemFire SQLFabric (<a href="http://community.gemstone.com/display/sqlfabric/SQLFabric" rel="nofollow">http://community.gemstone.com/display/sqlfabric/SQLFabric</a>).</p>
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		<title>By: What are the best choices for scaling Postgres? &#124; DBMS2 -- DataBase Management System Services</title>
		<link>http://www.dbms2.com/2009/06/22/h-store-horizontica-voltdb/#comment-133102</link>
		<dc:creator>What are the best choices for scaling Postgres? &#124; DBMS2 -- DataBase Management System Services</dc:creator>
		<pubDate>Wed, 29 Jul 2009 06:16:05 +0000</pubDate>
		<guid isPermaLink="false">http://www.dbms2.com/?p=818#comment-133102</guid>
		<description>[...] option for OLTP performance and scale-out is of course memory-centric options such as VoltDB or the Groovy SQL Switch.  But this client&#8217;s database is terabyte-scale, so hardware costs [...]</description>
		<content:encoded><![CDATA[<p>[...] option for OLTP performance and scale-out is of course memory-centric options such as VoltDB or the Groovy SQL Switch.  But this client&#8217;s database is terabyte-scale, so hardware costs [...]</p>
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		<title>By: The Groovy SQL Switch &#124; DBMS2 -- DataBase Management System Services</title>
		<link>http://www.dbms2.com/2009/06/22/h-store-horizontica-voltdb/#comment-133083</link>
		<dc:creator>The Groovy SQL Switch &#124; DBMS2 -- DataBase Management System Services</dc:creator>
		<pubDate>Wed, 29 Jul 2009 01:58:10 +0000</pubDate>
		<guid isPermaLink="false">http://www.dbms2.com/?p=818#comment-133083</guid>
		<description>[...] One obvious concern about Groovy&#8217;s approach is RAM cost. If you&#8217;re interested in the Groovy SQL Switch, you probably have a large transaction volume, in which case you probably also have a fast-growing database. Absent some kind of manual partitioning, the Groovy SQL Switch currently requires you to have enough RAM to hold that in its entirety. The same comment, of course, is probably true about VoltDB. [...]</description>
		<content:encoded><![CDATA[<p>[...] One obvious concern about Groovy&#8217;s approach is RAM cost. If you&#8217;re interested in the Groovy SQL Switch, you probably have a large transaction volume, in which case you probably also have a fast-growing database. Absent some kind of manual partitioning, the Groovy SQL Switch currently requires you to have enough RAM to hold that in its entirety. The same comment, of course, is probably true about VoltDB. [...]</p>
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		<title>By: Hasso Plattner calls for in-memory OLTP column stores &#124; DBMS2 -- DataBase Management System Services</title>
		<link>http://www.dbms2.com/2009/06/22/h-store-horizontica-voltdb/#comment-129595</link>
		<dc:creator>Hasso Plattner calls for in-memory OLTP column stores &#124; DBMS2 -- DataBase Management System Services</dc:creator>
		<pubDate>Wed, 08 Jul 2009 16:47:59 +0000</pubDate>
		<guid isPermaLink="false">http://www.dbms2.com/?p=818#comment-129595</guid>
		<description>[...] technology. There also are strong similarities to the MPP in-memory row store project H-Store/VoltDB, although I don&#8217;t know whether Plattner would go so far as to adopt the H-Store view that all [...]</description>
		<content:encoded><![CDATA[<p>[...] technology. There also are strong similarities to the MPP in-memory row store project H-Store/VoltDB, although I don&#8217;t know whether Plattner would go so far as to adopt the H-Store view that all [...]</p>
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		<title>By: Daniel Weinreb</title>
		<link>http://www.dbms2.com/2009/06/22/h-store-horizontica-voltdb/#comment-127888</link>
		<dc:creator>Daniel Weinreb</dc:creator>
		<pubDate>Mon, 29 Jun 2009 04:31:09 +0000</pubDate>
		<guid isPermaLink="false">http://www.dbms2.com/?p=818#comment-127888</guid>
		<description>During discussions I had with VoltDB (as it is now called) engineers, I suggested how useful it would be to have a way to migrate OLTP data gradually out of VoltDB and into Vertica, as particular items of data cease to change and become archival in nature. I suggested this to them and it turns out that they had been thinking along those lines already.  None of this means anything about future product plans or anything, just that they do know about that idea.</description>
		<content:encoded><![CDATA[<p>During discussions I had with VoltDB (as it is now called) engineers, I suggested how useful it would be to have a way to migrate OLTP data gradually out of VoltDB and into Vertica, as particular items of data cease to change and become archival in nature. I suggested this to them and it turns out that they had been thinking along those lines already.  None of this means anything about future product plans or anything, just that they do know about that idea.</p>
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		<title>By: Curt Monash</title>
		<link>http://www.dbms2.com/2009/06/22/h-store-horizontica-voltdb/#comment-127270</link>
		<dc:creator>Curt Monash</dc:creator>
		<pubDate>Fri, 26 Jun 2009 18:39:09 +0000</pubDate>
		<guid isPermaLink="false">http://www.dbms2.com/?p=818#comment-127270</guid>
		<description>Coincidentally, Vertica just gave me a heads-up on something specific Stonebraker plans to do for them. Details are confidential, but I figure it&#039;s OK to mention the general point ... ;)</description>
		<content:encoded><![CDATA[<p>Coincidentally, Vertica just gave me a heads-up on something specific Stonebraker plans to do for them. Details are confidential, but I figure it&#8217;s OK to mention the general point &#8230; <img src='http://www.dbms2.com/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' /> </p>
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		<title>By: Jay Allen</title>
		<link>http://www.dbms2.com/2009/06/22/h-store-horizontica-voltdb/#comment-127033</link>
		<dc:creator>Jay Allen</dc:creator>
		<pubDate>Thu, 25 Jun 2009 17:56:27 +0000</pubDate>
		<guid isPermaLink="false">http://www.dbms2.com/?p=818#comment-127033</guid>
		<description>In response to the first comment, I think the evidence is quite to the contrary.  Mike Stonebraker has suggested very strongly that &quot;one size does not fit all&quot; for database management systems anymore.  Vertica, Streambase and H-Store (now VoltDB) attack different problems.  Vertica isn&#039;t an OLTP database and VoltDB isn&#039;t for data warehousing.  For me, the interesting problem to solve will be how to get data from an OLTP database (say, VoltDB) into a data warehouse database (say, Vertica) to address both the operational and &quot;informational&quot; requirements of most businesses today.

Never underestimate Mike Stonebraker&#039;s insights.  With Ted Codd and Jim Gray gone, Dr. Stonebraker (along with the remaining original System R researchers) is one of the world&#039;s foremost experts on database technology.</description>
		<content:encoded><![CDATA[<p>In response to the first comment, I think the evidence is quite to the contrary.  Mike Stonebraker has suggested very strongly that &#8220;one size does not fit all&#8221; for database management systems anymore.  Vertica, Streambase and H-Store (now VoltDB) attack different problems.  Vertica isn&#8217;t an OLTP database and VoltDB isn&#8217;t for data warehousing.  For me, the interesting problem to solve will be how to get data from an OLTP database (say, VoltDB) into a data warehouse database (say, Vertica) to address both the operational and &#8220;informational&#8221; requirements of most businesses today.</p>
<p>Never underestimate Mike Stonebraker&#8217;s insights.  With Ted Codd and Jim Gray gone, Dr. Stonebraker (along with the remaining original System R researchers) is one of the world&#8217;s foremost experts on database technology.</p>
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