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StorNext File System Tuning
The Metadata Controller System
14 StorNext File System Tuning Guide
This setting is not adjustable after initial file system creation, so it is very
important to give it careful consideration during initial configuration.
Example: FsBlockSize 16K
JournalSize
The optimal settings for JournalSize are in the range between 16M and
64M, depending on the FsBlockSize. Avoid values greater than 64M
due to potentially severe impacts on startup and failover times. Values
at the higher end of the 16M-64M range may improve performance of
metadata operations in some cases, although at the cost of slower
startup and failover time.
The following table shows recommended settings. Choose the setting
that corresponds to your configuration.
Average No.
of Files Per
Directory
File System SIze: Less
Than 10TB
File System Size: 10TB
or Larger
Less than 10 FSB: 16KB
Metadata: 32 GB per 1M
files
FSB: 64KB
Metadata: 128 GB per
1M files
10-100 FSB: 16KB
Metadata: 8 GB per 1M
files
FSB: 64KB
Metadata: 32 GB per 1M
files
100-1000 FSB: 64KB
Metadata: 8 GB per 1M
files
FSB: 64KB
Metadata: 8 GB per 1M
files
1000 + FSB: 64KB
Metadata: 4 GB per 1M
files
FSB: 64KB
Metadata: 4 GB per 1M
files
FsBlockSize JournalSize
16KB 16MB
64KB 64MB