FSLogix Cluster – Sizing and Configuration

FSLogix Clusters are fundamental for ensuring user profile persistence across VDI environments. Each cluster node runs on Windows Server 2022 and provides dedicated storage for dynamic profiles, guaranteeing session consistency across different VDI hosts. Configuration is applied and managed through GPOs (Group Policy Objects), ensuring standardization and centralized governance throughout the environment.

FSLogix Configuration Parameters (via GPO)

Key	Type	Value (Production / CRC)	Value (Dev/QA)	Notes
Enabled	Dword	1	1	Enables FSLogix.
DeleteLocalProfileWhenVHDShouldApply	Dword	1	1	Removes local profiles when VHD is applied.
ForceLogoffOnSessionDisconnect	Dword	1	1	Forces logoff when a session is disconnected.
IsDynamic	Dword	1	1	Enables dynamic VHDX.
KeepLocalDir	Dword	1	1	Retains local directory.
LogoffWaitTime	Dword	768	768	Logoff wait time (ms).
OutlookCacheMode	Dword	1	1	Enables Outlook cache.
ProfileType	Dword	0	0	Default profile type (VHDX).
RoamIdentity	Dword	1	1	Enables identity roaming.
SizeInMBs	Dword	10000	15000	Maximum VHDX size.
VHDLocations	String	to define	to define	Path to the VHDX repository.
VolumeType	String	vhdx	vhdx	Volume type.

Summary

• Each VDI instance uses the FSLogix Agent to connect to the cluster over SMB (port 445).

• The dynamic disk setting (IsDynamic = 1) optimizes storage usage by expanding profiles as needed, preventing unnecessary disk consumption.

• The value of SizeInMBs is not fixed; it varies by environment and should be defined according to user requirements within each User Group (for example, Production users may require 10 GB, while Dev/QA users may need 15 GB or more).

• The VHDLocations path must be defined according to the final topology of the storage cluster.

Disk sizing is flexible and user-group dependent. FSLogix allows tailoring the maximum VHDX size per user group to match workload intensity while maintaining efficient storage allocation.