Quantum 6-01376-05 manual Example, Affinities

StorNext File System Tuning

The Metadata Controller System

Example:

[stripeGroup RegularFiles] Status UP

Exclusive No ##Non-Exclusive stripeGroup for all Files## Read Enabled

Write Enabled StripeBreadth 256K MultiPathMethod Rotate Node CvfsDisk6 0 Node CvfsDisk7 1

Affinities

Affinities are another stripe group feature that can be very beneficial. Affinities can direct file allocation to appropriate stripe groups according to performance requirements. For example, stripe groups can be set up with unique hardware characteristics such as fast disk versus slow disk, or wide stripe versus narrow stripe. Affinities can then be employed to steer files to the appropriate stripe group. For optimal performance, files that are accessed using large DMA-based

I/O could be steered to wide-stripe stripe groups. Less performance- critical files could be steered to slow disk stripe groups. Small files could be steered to narrow-stripe stripe groups.

Example:

[stripeGroup VideoFiles] Status UP

Exclusive Yes	##These Two lines set Exclusive stripeGroup##
Affinity VideoFiles	##for Video Files Only##
Read Enabled

Write Enabled

StripeBreadth 4M

MultiPathMethod Rotate

Node CvfsDisk2 0

Node CvfsDisk3 1

StorNext File System Tuning Guide 9