How does ordinary virtualization relate to virtualization used in a cloud computing environment? That was the topic of a talk at the Cloud Computing Expo in Santa Clara last week. Is there a difference? Or is it merely a logical or organizational distinction but the techniques used are still the same? Adam Hawley talked about this, slides linked to in the article, and how Oracle's products do or will fit into this paradigm. Database services in the cloud, Application Server services in the cloud, middleware provisioning in the cloud for yourself and your customers, isolation, privacy, security, replication, disaster management. Everything is still the same yet different.
I've been playing a bit with the nscd now and want to share some tips related to tuning the nscd.conf file. To see how the DNS cache is doing, use nscd -g. nscd configuration: 0 server debug level 26m 57s server runtime 5 current number of threads 32 maximum number of threads 0 number of times clients had to wait yes paranoia mode enabled 3600 restart internal passwd cache: no cache is enabled [other zero output removed] group cache: no cache is enabled [other zero output removed] hosts cache: yes cache is enabled yes cache is persistent yes cache is shared 211 suggested size <==== 216064 total data pool size 1144 used data pool size 3600 seconds time to live for positive entries <==== 20 seconds time to live for negative entries
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