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M6 VIRTUAL STORAGE (Concepts (container that holds files and objects…
M6 VIRTUAL STORAGE
Concepts
shared storage (LUN)
vMotion, HA, DRS
container that holds files and objects.VMFSNFSvSANVirtual Volumes
A virtual disk stored on VMFS datastore always appears to the virtual machine as a mounted SCSI device. The virtual disk hides the physical storage layer from the virtual machine’s operating system.
vsphere 6.5 vmfs6
Features
concurrent access to shared storage
dynamically expanded
Max 62TB
1 MB block size, good for storing large virtual disk files
subblock addressing, good for storing small files (8 KB)
Provides on-disk, block-level locking
SCSI-based storage devices
Direct attached storage
Fibre Channel
iSCSI
NFS
NFS version: 3 and 4.1
like VMFS
NO Network Lock Manager protocol,, ma protocollo proprietario
Lock files are named .lck-<fileid>,
vSAN
software defined storage
uses the storage components of each host in the cluster.
Object Store File System (OSFS)
object
logical volume that has its data and metadata distributed and accessed across the entire cluster.
appear as devices
multiple storage policies for datastore
Virtual Volumes
native rappresentation of VMDKs on SAN/NAS
Raw Device Mapping
Mapping file on VMFS datastore points to a raw LUN
Storage Device Naming Conventions
Runtime name
vmhbaN:C:T:L.
name is not persistent through reboots
iSCSI name
format iqn.yyyy-mm.naming- authority:unique name
iSCSI qualified name (IQN) and extended unique identifier (EUI)
worldwide unique name for identifying the node
iSCSI
NFS
VMFS
vSAN
Virtual Volumes