http://segnalibri.net/ Recent bookmarks posted to Scuttle. 60 http://gigaom.com/2010/04/26/open-vs-closed-what-does-open-really-mean/ The Open vs. Closed debate, which we’re covering as an ongoing series on the GigaOM Network, continues to bubble and boil around Facebook and the social networking site’s attempts to extend its “social graph” out into the broader web. Is this move by the company truly open, or is it a cynical attempt to co-opt the rest of the web and aggregate value for Facebook — or could it be both? That all depends on what the term “open” really means. Can a company or a service be partly open, or is it a binary thing? Can a service start out as mostly closed and then become open? And is it OK for a company to be open with some things and closed with others? lorello Mon, 07 Jun 2010 04:06:40 +0000 freesoftware letture open tradurre http://old.openspf.org/wizard.html?mydomain= Un Wizard per scrivere correttamente i record SPF per un dominio di posta lorello Sat, 05 Jun 2010 19:35:54 +0000 antispam howto letture mail posta spam spf http://openskill.info/infobox.php?ID=1476 lorello Thu, 13 May 2010 20:37:30 +0000 devops letture puppet softec http://bitfieldconsulting.com/puppet-resources source: Bitfield Consulting lorello Thu, 06 May 2010 04:18:51 +0000 letture puppet http://www.frozentux.net/ipsysctl-tutorial/ipsysctl-tutorial.html Tutorial su sysctl lorello Sun, 28 Mar 2010 19:36:21 +0000 howto ip letture networking sysadmin sysctl tutorial http://jimmyg.org/blog/2009/ssi-memcached-nginx.html lorello Mon, 08 Mar 2010 22:00:28 +0000 esi letture memcache nginx proxy scalability ssi varnish http://www.dbms2.com/2010/03/02/cassandra-nosql-scalable-oltp/ March 2, 2010 Cassandra and the NoSQL scalable OLTP argument lorello Mon, 08 Mar 2010 21:59:48 +0000 casssandra dbms letture nosql scalability http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9 The Cache-Control general-header field is used to specify directives that MUST be obeyed by all caching mechanisms along the request/response chain. The directives specify behavior intended to prevent caches from adversely interfering with the request or response. These directives typically override the default caching algorithms. Cache directives are unidirectional in that the presence of a directive in a request does not imply that the same directive is to be given in the response. lorello Wed, 03 Mar 2010 14:38:56 +0000 cache html letture proxy specifiche w3c http://www.mnot.net/cache_docs/#TIPS This is an informational document. Although technical in nature, it attempts to make the concepts involved understandable and applicable in real-world situations. Because of this, some aspects of the material are simplified or omitted, for the sake of clarity. If you are interested in the minutia of the subject, please explore the References and Further Information at the end. lorello Tue, 02 Mar 2010 23:13:08 +0000 apache cache http letture mod_expires mod_headers reverse-proxy sysadmin http://de.planet.mysql.com/entry/?id=20804 Un DBA e MySQL specialist, ci insegna come misurare i colli di bottiglia sul db. lorello Mon, 01 Mar 2010 18:26:38 +0000 letture mysql performance http://ubuntuforums.org/showthread.php?t=880218 Having trouble w/ Broadcom on Hardy? Give this a shot - Ubuntu Forums lorello Sun, 25 Oct 2009 11:36:59 +0000 broadcom hardware letture linux ubuntu http://docs.google.com/View?docid=dhh49qhm_384gs2hd2f7 /boot Raid1 and Raid10 Data With XFS or ext4 lorello Mon, 07 Sep 2009 18:04:01 +0000 letture linux performance raid server sysadmin tutorial http://java.sun.com/javase/6/docs/technotes/guides/management/jconsole.html Java SE Monitoring and Management Guide lorello Sat, 11 Jul 2009 15:04:24 +0000 jconsole jvm letture monitoring tomcat http://www.jroller.com/maximdim/entry/monitoring_jvm_with_mrtg_part After previous post about monitoring JVM memory with MRTG I've got few comments suggesting that it should be possible to do the same thing via SNMP protocol, support for which is built in into JVM at least since version 1.5. It seems like a better approach, at least from system load prospective (no need to run jstat/jps every few minutes) and apparently enabling SNMP agent in the JVM suppose to have very negligible impact on JVM performance. Indeed, it turned out that it's surprisingly simple to do if you know what you're doing ;) Big thanks goes to Daniel Fuchs from Sun, for providing very useful comments and adding to my (quite limited) understanding of SNMP protocol. lorello Sat, 11 Jul 2009 15:02:42 +0000 jvm letture monitoring mrtg tomcat http://www.ibm.com/developerworks/linux/library/l-ganglia-nagios-1/index.html This is the first article in a two-part series that looks at a hands-on approach to monitoring a data center using the open source tools Ganglia and Nagios. In Part 1, see how to install and configure Ganglia, the scalable, distributed monitoring system for high-performance clusters based on a hierarchical design. Also learn how to add more monitoring capability by writing Ganglia plug-ins and by enabling external-source spoofing lorello Wed, 01 Jul 2009 19:54:17 +0000 ganglia integration ipmi letture monitoring nagios sysadmin