VMworldl 2017: What’s new in storage

Session: SER1317BU

Faster storage need faster networks
-10/25/40 NICs are now the norm
-Protocol stack needs to be upgraded with new storage protocols
-Performance of AFA depends on network connection with low latency
-32Gbps FC is shipping, 64Gbps is coming

NVMe – A logical device interface to NVM devices
-PCIe is the physical interface and NVMe is the protocol
-up to 64K queues and 64K queue depth
-All major OSes support NVMe

-Allows large number of external NVMe drives into external storage
-Aims for no more than 10 microseconds latency overhead compared to local NVMe

vSphere 6.5 Features
-VMFS 6.0
*meta data is 4K aligned
*supports 64-bit addressing
*NO in-place upgrade from VMFS 5.0. See KB 2147824

Automatic Unmap in 6.5
-Automatic unmap support when VM is deleted/migrated
-Space reclimation requests from guest OS which supports UMAP
-Only automatic unmap on arrays with UNMAP granularity LESS than 1MB
-Background impact is minimal: set to 25MB/sec max
-Future: Possibly throttle/accelerate UNMAP rate based on array load

High Capacity Drives in 6.5
-Support 512e drives
-Requires VMFS 6
-vSphere 6.0 supports physical mode RDMs mapped to 512e drives
-FAQ: KB2091600

New Scale Limits
-512 LUNs & 2048 paths
-If using 8 paths per LUN, you can now have 256 LUNs

NFS 4.1 Plug-in and strong crypto & HW acceleration support
-NFS 4.1 supported since 6.0
-HW acceleration (VAAI) now supported
-Stronger crypto with AES
-Supports IPv6
-Better security with NFS 4.1

Virtual NMVe in 6.5
-NVMe 1.0 device emulation
-Hot add/remove
-Multi-Q support – 16 queues with 4K depth

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