VoltDB Evaluation Notes « Petter Måhlén's Blog. I’m currently working on an interesting project that has some, from my perspective, pretty large-scale storage requirements – hundreds of millions of entities, around 1TB of storage volume, and needing to concurrently support thousands of writes and tens of thousands of reads per second. Reads are fine, but the number of writes is beyond what a conventional RDBMS can comfortably deal with. Some people are apparently able to do ~1000-1500 writes/second or even more, but in our current ecosystem, the biggest number we’ve been able to get to is about 400/second.
Plus writes tend to get slower as table sizes grow, and we’re talking hundreds of millions of entries. So in the beginning of the project, we were looking at alternatives. Our first stop, of course, was NoSQL databases. We checked out a fair few of them over a period of a month or two: HBase, MongoDB, Riak, etc. The Good I’ll admit it; I quickly fell in love with VoltDB. The second really good thing is the management interface/s. eNovance | Cloud & Managed Services Provider. Cloud Foundry Open Source | Cloud Foundry. App Engine. UrlRewriteFilter - Rewrite URL's in Java Web Application Servers. A Java Web Filter for any compliant web application servers (such as Tomcat, JBoss, Jetty or Resin), which allows you to rewrite URLs before they get to your code. It is a very powerful tool just like Apache's mod_rewrite.
Install <dependency><groupId>org.tuckey</groupId><artifactId>urlrewritefilter</artifactId><version>4.0.3</version></dependency> To WEB-INF/web.xml add (near the top above any servlet mappings): (see filter parameters for more options) <filter><filter-name>UrlRewriteFilter</filter-name><filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class></filter><filter-mapping><filter-name>UrlRewriteFilter</filter-name><url-pattern>/*</url-pattern><dispatcher>REQUEST</dispatcher><dispatcher>FORWARD</dispatcher></filter-mapping> Add urlrewrite.xml in WEB-INF (src/main/webapp/WEB-INF/ for Maven users) Documentation What is URL Rewriting?
URL Tidyness / URL Abstraction - keep URLs tidy irrespective of the underlying technology or framework (JSP, Servlet, Struts etc).