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StorNext File System Tuning
The Metadata Controller System
StorNext File System Tuning Guide 9
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 0
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