Monday, 27 January 2014

Objective 1.2 - Manage Storage Capacity in a vSphere Environment

Knowledge - Identify storage provisioning methods
GUI - Select host > Configuration >  Storage > Add Storage

NFS CMD - esxcli storage nfs add -H <ip address> -s <nfs path> -v <datastore name>

VMFS Link
VMFS CMD1 - fdisk /vmfs/devices/disks/<device id>
VMFS CMD2 - vmkfstools -C vmfs5 -b <blocksize> -S <datastore name> /vmfs/devices/disks/<device id>:<partition>

Knowledge - Identify available storage monitoring tools, metrics and alarms
GUI - Storage Maps are useful for getting a graphic of the datastore, host and hba connectivity.

GUI - Storage Reports give a view easily exported as html etc.
Home > Hosts & Clusters > Host > Configuration > Storage

Skills and Abilities - Apply space utilization data to manage storage resources
Grow LUN expand volume hot add no outage

Applying extents hot add no outage

Inflate thin VMDK to thick


sDRS for I/O load balancing and capacity balancing

Skills and Abilities - Provision and manage storage resources according to Virtual Machine requirements
How much space,  IOPs and reliability

Space = Datastore Free Space
IOPs = SAN config RAID etc
Reliability = SAN RAID etc

Use sDRS to automate provisioning VMs to storage with correct properties and moving VMs to most appropriate ongoing.



Skills and Abilities - Understand interactions between virtual storage provisioning and physical storage provisioning
The formatting of the disk,  thin, thick, or thick eager zero will have an effect on how the blocks are written to the physical disk.

The use of VAAI calls also impacts the relationship the VM has with the disk by offloading some operations such as disk clones.

Skills and Abilities - Apply VMware storage best practices
User sDRS where available.

Enable VAAI and NFS VAAI where available.

Set alarms on datastores to ensure they don't get full.

Skills and Abilities - Configure Datastore Alarms
Default datastore level alarms.
Default datastore cluster level alarms.

Datastore alarms which can be added.

Alarms can be applied to individual datastore, datastore cluster, host cluster, datacenter.

Skills and Abilities - Analyze Datastore Alarms and errors to determine space availability
CMD - vmkfstools - P /vmfs/volumes/<datastore> -h
    (capacity \ available \ block size)

CMD - df -h
    (datastores \ filesystem \ size \ used \ available \ use% \ mount)


Skills and Abilities - Configure Datastore Clusters

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