<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:wfw="http://wellformedweb.org/CommentAPI/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
	xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
	>

<channel>
	<title>The Xamin Blog</title>
	<atom:link href="http://skyview.gsfc.nasa.gov/xaminblog/index.php/feed/" rel="self" type="application/rss+xml" />
	<link>http://skyview.gsfc.nasa.gov/xaminblog</link>
	<description></description>
	<lastBuildDate>Tue, 05 Mar 2013 17:44:30 +0000</lastBuildDate>
	<language>en-US</language>
	<sy:updatePeriod>hourly</sy:updatePeriod>
	<sy:updateFrequency>1</sy:updateFrequency>
	<generator>http://wordpress.org/?v=3.5.1</generator>
		<item>
		<title>Xamin V2.2 Released</title>
		<link>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/03/05/xamin-v2-2-released/</link>
		<comments>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/03/05/xamin-v2-2-released/#comments</comments>
		<pubDate>Tue, 05 Mar 2013 17:44:30 +0000</pubDate>
		<dc:creator>Tom</dc:creator>
				<category><![CDATA[Notice]]></category>
		<category><![CDATA[Release]]></category>

		<guid isPermaLink="false">http://skyview.gsfc.nasa.gov/xaminblog/?p=140</guid>
		<description><![CDATA[The major change to this version is that Xamin now generates preview image windows giving SkyView survey cutouts for queries that involve a single position. By default DSS and RASS cutouts are created, but this can be controlled in the &#8230; <a href="http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/03/05/xamin-v2-2-released/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
		<wfw:commentRss>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/03/05/xamin-v2-2-released/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>ConeSearch usage filtering</title>
		<link>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/01/22/conesearch-usage-filtering/</link>
		<comments>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/01/22/conesearch-usage-filtering/#comments</comments>
		<pubDate>Tue, 22 Jan 2013 18:02:52 +0000</pubDate>
		<dc:creator>Tom</dc:creator>
				<category><![CDATA[Discussion]]></category>
		<category><![CDATA[Notice]]></category>
		<category><![CDATA[Cone Search]]></category>
		<category><![CDATA[DOS]]></category>

		<guid isPermaLink="false">http://skyview.gsfc.nasa.gov/xaminblog/?p=136</guid>
		<description><![CDATA[For the past several weeks we have been seeing extremely heavy usage (>~ 1 request per second) with several distinct users sending tens of thousands of cone search requests in rapid succession. Unfortunately, they generally seem to be sending a &#8230; <a href="http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/01/22/conesearch-usage-filtering/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
		<wfw:commentRss>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/01/22/conesearch-usage-filtering/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Heavy Usage</title>
		<link>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/01/09/heavy-usage/</link>
		<comments>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/01/09/heavy-usage/#comments</comments>
		<pubDate>Wed, 09 Jan 2013 16:02:27 +0000</pubDate>
		<dc:creator>Tom</dc:creator>
				<category><![CDATA[Notice]]></category>
		<category><![CDATA[filtering]]></category>
		<category><![CDATA[usage]]></category>

		<guid isPermaLink="false">http://skyview.gsfc.nasa.gov/xaminblog/?p=131</guid>
		<description><![CDATA[This morning we had a user making very heavy usage of Xamin sending multiple cone search requests per second. Requests piled up in the database and this slowed down the system considerably. Requests that normally took a second could take &#8230; <a href="http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/01/09/heavy-usage/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
		<wfw:commentRss>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2013/01/09/heavy-usage/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Tomcat instability</title>
		<link>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/11/28/tomcat-instability/</link>
		<comments>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/11/28/tomcat-instability/#comments</comments>
		<pubDate>Wed, 28 Nov 2012 14:22:26 +0000</pubDate>
		<dc:creator>Tom</dc:creator>
				<category><![CDATA[Discussion]]></category>
		<category><![CDATA[batch]]></category>
		<category><![CDATA[bugs]]></category>
		<category><![CDATA[cone]]></category>
		<category><![CDATA[Login Service]]></category>
		<category><![CDATA[tomcat]]></category>

		<guid isPermaLink="false">http://skyview.gsfc.nasa.gov/xaminblog/?p=126</guid>
		<description><![CDATA[During the past couple of days our Tomcat installation, including the Xamin and login service web services, has not been very stable. This may be due to some error in the Xamin or login service web service but regardless of &#8230; <a href="http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/11/28/tomcat-instability/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
		<wfw:commentRss>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/11/28/tomcat-instability/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Xamin 1.7 released</title>
		<link>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/03/xamin-1-7-released/</link>
		<comments>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/03/xamin-1-7-released/#comments</comments>
		<pubDate>Wed, 03 Oct 2012 15:06:48 +0000</pubDate>
		<dc:creator>Tom</dc:creator>
				<category><![CDATA[Announce]]></category>
		<category><![CDATA[documentation]]></category>
		<category><![CDATA[Web interface]]></category>

		<guid isPermaLink="false">http://skyview.gsfc.nasa.gov/xaminblog/?p=118</guid>
		<description><![CDATA[A new information pane is now included in the main Xamin web interface. This pane shows information about groups of tables and the detailed table documentation. Previously this information had been displayed in the bottom of the main query pane. &#8230; <a href="http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/03/xamin-1-7-released/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
		<wfw:commentRss>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/03/xamin-1-7-released/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>HEASARC batch queries handled by Xamin</title>
		<link>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/02/heasarc-batch-queries-handled-by-xamin/</link>
		<comments>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/02/heasarc-batch-queries-handled-by-xamin/#comments</comments>
		<pubDate>Tue, 02 Oct 2012 13:50:49 +0000</pubDate>
		<dc:creator>Tom</dc:creator>
				<category><![CDATA[Announce]]></category>
		<category><![CDATA[Batch queries]]></category>
		<category><![CDATA[Browse]]></category>

		<guid isPermaLink="false">http://skyview.gsfc.nasa.gov/xaminblog/?p=69</guid>
		<description><![CDATA[At approximately 9:30 AM EDT October 2 2012 we have moved the handling of batch queries to use our Xamin system. For most users we hope this will be transparent, but see our previous articles for potential changes. Benchmarks have &#8230; <a href="http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/02/heasarc-batch-queries-handled-by-xamin/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
		<wfw:commentRss>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/02/heasarc-batch-queries-handled-by-xamin/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Positional matching in Postgres</title>
		<link>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/01/positional-matching-in-postgres/</link>
		<comments>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/01/positional-matching-in-postgres/#comments</comments>
		<pubDate>Mon, 01 Oct 2012 19:55:07 +0000</pubDate>
		<dc:creator>Tom</dc:creator>
				<category><![CDATA[Discussion]]></category>
		<category><![CDATA[Benchmarks]]></category>
		<category><![CDATA[PGSphere]]></category>
		<category><![CDATA[PostGIS]]></category>
		<category><![CDATA[Q3C]]></category>
		<category><![CDATA[Spatial Indices]]></category>

		<guid isPermaLink="false">http://skyview.gsfc.nasa.gov/xaminblog/?p=79</guid>
		<description><![CDATA[Positional Queries One of the fundamental operations for astronomical databases is finding objects by position.  Two common scenarios are where we may want all of the objects near to a specified location or a positional cross-correlation between two tables.  There &#8230; <a href="http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/01/positional-matching-in-postgres/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
		<wfw:commentRss>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/10/01/positional-matching-in-postgres/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Batch Queries Moving to Xamin</title>
		<link>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/09/26/batch-queries-moving-to-xamin/</link>
		<comments>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/09/26/batch-queries-moving-to-xamin/#comments</comments>
		<pubDate>Wed, 26 Sep 2012 15:19:13 +0000</pubDate>
		<dc:creator>Tom</dc:creator>
				<category><![CDATA[Announce]]></category>
		<category><![CDATA[Batch queries]]></category>
		<category><![CDATA[Browse]]></category>

		<guid isPermaLink="false">http://skyview.gsfc.nasa.gov/xaminblog/?p=70</guid>
		<description><![CDATA[On October 2, 2012 we will begin sending batch queries to our  Xamin interface.  Internal tests have shown Xamin about twice as fast as the current interface. The switch will be accomplished by internally redirecting batch queries sent to the &#8230; <a href="http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/09/26/batch-queries-moving-to-xamin/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
		<wfw:commentRss>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/09/26/batch-queries-moving-to-xamin/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Xamin and batch queries</title>
		<link>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/09/06/xamin-and-batch-queries/</link>
		<comments>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/09/06/xamin-and-batch-queries/#comments</comments>
		<pubDate>Thu, 06 Sep 2012 17:23:10 +0000</pubDate>
		<dc:creator>Tom</dc:creator>
				<category><![CDATA[Announce]]></category>
		<category><![CDATA[Batch queries]]></category>
		<category><![CDATA[Browse]]></category>

		<guid isPermaLink="false">http://skyview.gsfc.nasa.gov/xaminblog/?p=58</guid>
		<description><![CDATA[Over the next couple of weeks we plan for Xamin to take over responsibility for batch queries sent to the HEASARC. In our initial tests the Xamin queries ran about 4 times faster.  While we&#8217;ve made some efforts to minimize &#8230; <a href="http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/09/06/xamin-and-batch-queries/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
		<wfw:commentRss>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/09/06/xamin-and-batch-queries/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Xamin passes query milestone</title>
		<link>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/08/23/xamin-passes-query-milestone/</link>
		<comments>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/08/23/xamin-passes-query-milestone/#comments</comments>
		<pubDate>Thu, 23 Aug 2012 13:27:01 +0000</pubDate>
		<dc:creator>Tom</dc:creator>
				<category><![CDATA[Discussion]]></category>
		<category><![CDATA[batch]]></category>
		<category><![CDATA[Cone Search]]></category>
		<category><![CDATA[usage]]></category>
		<category><![CDATA[VO]]></category>

		<guid isPermaLink="false">http://skyview.gsfc.nasa.gov/xaminblog/?p=56</guid>
		<description><![CDATA[The vast majority of the queries that the HEASARC receives are through automated interfaces that use either the VO cone search protocol or the Batch protocol we developed for Browse (long before the VO). Starting this week cone searches are &#8230; <a href="http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/08/23/xamin-passes-query-milestone/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
		<wfw:commentRss>http://skyview.gsfc.nasa.gov/xaminblog/index.php/2012/08/23/xamin-passes-query-milestone/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
	</channel>
</rss>
