Quantum 3.5.1 Manuel D’Utilisation

Chapter 6  Managing the File System

Managing File System Operations

StorNext User’s Guide

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• Windows Security: Enable this option (check the box) to allow all 

Windows clients to use Microsoft Windows native security. If this 

option is enabled, then a Windows administrator may set Windows 

security on all files and directories for any user or group defined on 

the local Windows client or Windows domain.

• Use Physical Memory Only: When this option selected, the file 

system will use only physical memory, not swapped or paged.

• Quotas: Select this option to enable enforcing quotas for users and 

groups. 

 

• Inode Expansion Blocks: Use these fields to configure the minimum 

(floor), maximum (ceiling), and increment of the block allocation size 

for a dynamically expanding file. 
• Minimum: This value specifies the minimum number of blocks 

allocated when a file requires additional space.

• Maximum: This value specifies the maximum number of blocks 

allocated on subsequent expansion. The range is from 1 to 32768 

blocks.

• Increment: When the allocation space is exhausted, this value 

specifies the increment added to the last allocation size, up to the 

maximum number of file system blocks.

• Max Connections: Specify the maximum number of 

simultaneous connections for the file system.

• Reserved Space: This option enables delayed allocations on 

clients. Reserved space is a performance feature that allows 

clients to perform buffered writes on a file without first obtaining 

real allocations from the metadata controller. The allocations are 

later performed when the data is flushed to disk in the 

background by a daemon performing a periodic sync.
If the Reserved Space option is not enabled, slightly more disk 

space can be used at the expense of buffer cache performance, 

which could be adversely affected and cause fragmentation.

Quotas are based on actual usage, and are not enforced 

based on space allocated.