Quantum 3.1.4.1 manual Affinities

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StorNext File System Tuning

The Metadata Controller System

StripeBreadth 256K

MultiPathMethod Rotate

Node CvfsDisk6 0

Node CvfsDisk7 1

[StripeGroup MetaFiles]

Status UP

MetaData Yes

Journal No

Exclusive Yes

Read Enabled

Write Enabled

StripeBreadth 256K

MultiPathMethod Rotate

Node CvfsDisk0 0

[StripeGroup JournFiles]

Status UP

Journal Yes

MetaData No

Exclusive Yes

Read Enabled

Write Enabled

StripeBreadth 256K

MultiPathMethod Rotate

Node CvfsDisk1 0

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 AudioFiles] Status UP

Exclusive Yes ##These two lines set Exclusive stripeGroup ##

10	StorNext File System Tuning Guide

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Contents StorNext Copyright Statement Contents Contents StorNext File System Tuning Underlying Storage SystemCaching RAID Cache ConfigurationRAID Write-Back RAID Read-Ahead RAID Level, Segment Size, and Stripe Size File Size Mix and Application I/O Characteristics Buffer Cache NFS / CifsSnfs and Virus Checking Metadata NetworkMetadata Controller System FSM Configuration File Settings Stripe GroupsAffinities StripeBreadth ThreadPoolSize BufferCacheSizeInodeCacheSize ForcestripeAlignment FsBlockSizeJournalSize FsBlockSize JournalSizeSnfs Tools StorNext File System Tuning Metadata Controller System StorNext File System Tuning Metadata Controller System Latency-testindex-number seconds Mount Command Options Hardware Distributed LAN Disk Proxy NetworksSnfs External API StorNext File System Tuning Guide Network Configuration and Topology SwitchDistributed LAN Servers Distributed LAN Client Vs. Legacy Network Attached StorageLoad Balancing Client Scalability Fault tolerancePerformance Windows Memory Requirements Robustness and Stability Consistent Security ModelStorNext File System Tuning Windows Memory Requirements Sample FSM Configuration File StorNext File System Tuning Sample FSM Configuration File StorNext File System Tuning Sample FSM Configuration File StorNext File System Tuning Sample FSM Configuration File StorNext File System Tuning Sample FSM Configuration File StorNext File System Tuning Sample FSM Configuration File