Yahoo Japan Corporation has operated a private cloud infrastructure for developing applications which support a variety of services. Their challenges are to build a cloud infrastructure with excellent scalability that meets the needs for rapid business growth, deploy an OpenStack infrastructure that can respond flexibly to the diverse needs of each service and adopt storage systems to support OpenStack Block Storage. They chose NetApp to overcome these challenges. They have implemented NetApp clustered data ONTAP 8.2 RAID-DP, FlexVol and Snapshot, NetApp FAS system with active-active configuration, NetApp flash cache, NetApp SnapMirror software and NetApp OnCommand management software. The results of implementing NetApp were it supports non-stop operations of the cloud infrastructure through high-availability storage, enables deployment of a large number of VMs while maximizing disk utilization with FlexVol and give possible development in disaster recovery capacity between sites by utilizing NetApp data protection feature.