Failover Cluster Node Operating System Selection
Windows Server 2012 supports only the 64-bit operating systems. If any services or applications require deployment on 32-bit operating systems, and if this application is deployed on a Windows Server 2012 failover cluster, performance of that application may suffer and should be tested thoroughly before deployment on production failover clusters. Also, verify that these 32-bit applications are indeed supported on Windows Server 2012 failover clusters and not just on Windows Server 2008 or Windows Server 2003 32-bit failover clusters.
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