VMware released VMware vSphere 5.5 Update 3 for ESXi and vCenter Server introducing new features and enhancements as well as resolving many issues.
With this new release, vCenter Server Windows based now officially supports SQL 2012 R2 SP2 and SQL 2008 R2 SP3.
What's new in ESXi
Log Rotation enablement: log rotation for vmx files allows you to reduce the log file sizes by specifying the size of each log and the number of previous logs to keep.
Certification of PVSCSI Adapter: PVSCSI adapter is certified for use with MSCS, core clustering and applications including SQL and Exchange. This creates performance gains when moving from LSI Logic SAS to PVSCSI.
Support for Next Generation Processors: in this release are supported the next generation processors from Intel and AMD.
Authentication for Active Directory: ESXi is modified to only support AES256-CTS/AES128-CTS/RC4-HMAC encryption for Kerberos communication between ESXi and Active Directory.
Additional info can be found in the ESXi Release Notes.
What's new in vCenter Server
vCenter Server now supports the following external databases: Oracle 12c R1 P2 (184.108.40.206), Microsoft SQL Server 2012 Service Pack 2, Microsoft SQL Server 2008 R2 Service Pack 3
Added support for the following operating systems: CentOS 7.0, Oracle Linux 7.0, Ubuntu 14.10, Windows 10, RHEL 6.6, RHEL 7 .1, CentOS 7.1, Oracle Linux 7.1
Features added: log information of files uploaded and downloaded from a host using vSphere Web Client or vSphere Client are stored. For more details see KB 2117341.
Additional info can be found in the vCenter Server Release Notes.