ext4 optimization and throughput (Preview)

Scenario: Debian Stable 6.0 under VmWare ESXi 4.1
Cases:

• 1 core and 497 Mb RAM
• 4 cores and 4Gb RAM

Test used:  Phoronix Test Suite
Mount options:

• defaults
• noatime
• long  noatime,barrier=0,data=writeback,nobh,commit=100,nouser_xattr
• no_journal - defaults, but fs created with "mkfs.ext4 /dev/sdb1 -O^has_journal" defaults

Results Case1 (1 Core):
http://openbenchmarking.org/result/1103169-IV-MERGE774922
Results Case2 (4 Cores):
http://openbenchmarking.org/result/1103166-IV-EXT44CORE94
Results Case1 & Case2 Mixed:
http://openbenchmarking.org/result/1103169-IV-MERGE774922 (It has some visualization problems)
Comments:
To be update... soon
Improvements to do:
Test in a bare installation, and testing hypervisor overload (vmware Vs. kvm)