http://www.google.com/url?sa=t&rct=j&q=rhevm%20disk%20io%20performance&source=web&cd=1&ved=0CFIQFjAA&url=http://www.redhat.com/summit/2012/presentations/files/rhev-troubleshooting-summit2012_dk.odp&ei=7ZMlUK_4Mse5igKT-oCoBg&usg=AFQjCNHH_iEDyPMyQU1gWg8SqMBT7UCO1w&cad=rja For administrators who what to understand how RHEV works and and how to troubleshoot possible issues. (RHEV is complicated )
http://www.google.com/url?sa=t&rct=j&q=rhevm%20disk%20io%20performance&source=web&cd=1&ved=0CFIQFjAA&url=http://www.redhat.com/summit/2012/presentations/files/rhev-troubleshooting-summit2012_dk.odp&ei=7ZMlUK_4Mse5igKT-oCoBg&usg=AFQjCNHH_iEDyPMyQU1gWg8SqMBT7UCO1w&cad=rja For administrators who what to understand how RHEV works and and how to troubleshoot possible issues. (RHEV is complicated )
http://www.google.com/url?sa=t&rct=j&q=rhevm%20disk%20io%20performance&source=web&cd=1&ved=0CFIQFjAA&url=http://www.redhat.com/summit/2012/presentations/files/rhev-troubleshooting-summit2012_dk.odp&ei=7ZMlUK_4Mse5igKT-oCoBg&usg=AFQjCNHH_iEDyPMyQU1gWg8SqMBT7UCO1w&cad=rja For administrators who what to understand how RHEV works and and how to troubleshoot possible issues. (RHEV is complicated )
http://www.mysqlperformanceblog.com/2011/02/03/how-innodb-handles-redo-logging/
http://www.mysqlperformanceblog.com/2011/02/03/how-innodb-handles-redo-logging/ How MySQL InnoDB implements transaction log, aka REDO (Oracle), aka WAL (PostgreSQL)
http://openfoo.org/blog/amazon_ec2_underlying_architecture.html Some description of EC2 Internals. EC2s are XEN VMs, mine is currently using Xen 3.0.3-rc5-8.1.14.f , which appears to be F14 Xen package re-build on RHEl5.x (this is by looking at compiler version) . Some info in the article appears to a bit outdated
http://rhaas.blogspot.com/2010/11/mysql-vs-postgresql-part-1-table.html An article from a well-known PostgreSQL developer comparing MySQL InnoDB and PostgreSQL table structures
http://blog.zhuzhaoyuan.com/2009/09/nginx-internals-slides-video/ very good presentation slides explaining nginx internals, such as main architecture, main event loops, core modules, processing pipelines, etc. Also there is a video of the talk , but it is mandarin, so YMMV :-)