MS SQL Server 2008 cluster Vs MySQL 5.0 Cluster

Here is a high level comparison between Clustered Microsoft SQL Server 2008 vs MySQL NDB Cluster

Feature	MS SQL Server 2008	MySQL Cluster 7.21
Technology used	Windows Clustering Technology	N(Network)DB(Database) Cluster technology
Resources	Shared within the cluster nodes	No shared resources
Operating System	Windows	Oracle Linux (4,5,6) Solaris 10 Solaris 9 Red Hat Enterprise Linux (4,5,6) SuSE Enterprise Linux (10,11) Microsoft Windows 7 Microsoft Windows Vista Microsoft Windows 2008 Server (incl R2) Microsoft Windows 2003 Server Microsoft Windows XP
Number of physical hosts	Minimum 2 physical hosts	Minimum 6 physical hosts
Load Balancing	Single active node without load balancing	Multiple MySQL active nodes and data nodes resulting in load balancing
Memory	Minimum 512 MB (2GB or greater recommended)	1 GB per node
Available Disk	Minimum 10 GB (40 GB or greater recommended)	3 GB per node
Processor	Minimum 1 GHz (x86), 1.4 GHz (x64) (2 GHz or faster Recommended)	Intel/AMD x86, UltraSPARC
Network
Automatic Failover	Supported	Supported
Hardware footprint	Less because of shared resources	More because of share nothing cluster
Software requirements	Supports all software which x64 compitable	Supports all softwares with x32 and x64 compatibility
Geographically Dispersed cluster	Supported in Windows Server 2008 onwards	Supported in MySQL Cluster 7.2 onwards
Hosting on Virtual Machine	Supported	Supported
Cluster monitoring tools	Cluster Administrator comes as built in tool	Cluster Manager. Not open source and comes with CGE (Carrier Grade Edition)
Code Compilation	No required	Available as compiled or NDB code can be locally compiled
Embedded database capabilities	Available as compact and express editions	Supported using embedded libraries
Scalability	Scalability using built in tools such as resource governor, hot-add memory and CPU, hosting multiple instances	Scale up on single machine or across multiple servers by adding MySQL and/or data nodes