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Introductie Windows Server 2016

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73 C H A P T E R 3 | Storage Figure 3-9: Example of a Storage Spaces Direct deployment It is important to also understand that Storage Spaces Direct is an evolution of Storage Spaces, which means that it is an extension of the existing SDS stack for Windows Server. Another important aspect is that Storage Spaces Direct uses SMB 3.0 for all intranode (also called east-west) communication, and takes advantage of all the powerful features of SMB 3.0, such as SMB Direct (RDMA-enabled NICs) for high bandwidth and low latency communication, and SMB Multichannel for bandwidth aggregation and network fault tolerance. Implementation details Storage Spaces Direct seamlessly integrates with the features you know today that make up the Windows Server SDS stack, including Scale-Out File Server (SMB 3.0), Clustered Shared Volume File System (CSVFS), Storage Spaces, and Failover Clustering. Figure 3-10 illustrates the Storage Spaces Direct stack. Figure 3-10: Storage Spaces Direct stack The updated stack includes the following, starting from the bottom: Hardware The storage system consists of a minimum of four storage nodes with local storage. Each storage node can have internal drives or drives in an external SAS-connected JBOD enclosure. The drive devices can be SATA disks or SAS disks. Software Storage Bus The Software Storage Bus spans all of the storage nodes and brings together the local storage in each node, so all drives are visible to the Storage Spaces layer above.

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