A few questions about VMware Flash Read Cache (vFRC)

Hello

1) there is a way to simulate a VMFS datastore as SSD device. See the instructions in the following link:

http://tomverhaeg.nl/VMware-ESXi/VMware-ESXi-tag-a-device-as-local-and-SSD/

1 a) can we fake a NFS datastore as a SSD device?

1 (b) partitions on the SSD device must be empty in order for the vFRC to work.

There are two scenarios here: empty the lun (with no VMFS file system) and VMFS LUNS (with no data). Both scenarios would work for vFRC?

(2) a device SSD shareable by multiple ESXi hosts?

(3) several flash pools can be created for each host ESXi? If so, what is the maximum number of pools of flash can be created by ESXi host?

(4) a device SSD can be used as a local drive?

1 a) can we fake a NFS datastore as a SSD device?

>> N°

1 (b) partitions on the SSD device must be empty in order for the vFRC to work.

There are two scenarios here: empty the lun (with no VMFS file system) and VMFS LUNS (with no data). Both scenarios would work for vFRC?

> empty lun with no partitions is necessary... Partitioned VMFS LUNs cannot be used because VFRC works with VFFS file system

(2) a device SSD shareable by multiple ESXi hosts?

> not in a context vFRC, normal on SSD lun VMFS datastore can be shared and used for features such as "swap for ssd.

(3) several flash pools can be created for each host ESXi? If so, what is the maximum number of pools of flash can be created by ESXi host?

> No, there may be only one pool that will be shared for all VMDK to a permit for the use of vFRC. but also exchange for SSD if configured.

(4) a device SSD can be used as a local drive?

> claiming remote as local is possible. but not recommended and performance improvement is not guaranteed in this case with vFRC...

Tags: VMware

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