StorNext File System Tuning
The Metadata Controller System
Average No. |
|
|
of Files Per | File System SIze: Less | File System Size: 10TB |
Directory | Than 10TB | or Larger |
|
|
|
Less than 10 | FSB: 16KB | FSB: 64KB |
| Metadata: 32 GB per 1M | Metadata: 128 GB per |
| files | 1M files |
|
|
|
FSB: 16KB | FSB: 64KB | |
| Metadata: 8 GB per 1M | Metadata: 32 GB per 1M |
| files | files |
|
|
|
FSB: 64KB | FSB: 64KB | |
| Metadata: 8 GB per 1M | Metadata: 8 GB per 1M |
| files | files |
|
|
|
1000 + | FSB: 64KB | FSB: 64KB |
| Metadata: 4 GB per 1M | Metadata: 4 GB per 1M |
| files | files |
|
|
|
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
The following table shows recommended settings. Choose the setting that corresponds to your configuration.
FsBlockSize | JournalSize |
|
|
16KB | 16MB |
|
|
64KB | 64MB |
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14 | StorNext File System Tuning Guide |