ZFS Tunables for Lustre Metadata Servers (MDS)
Jump to navigation
Jump to search
| Parameter | Notes | Default | Suggested |
|---|---|---|---|
| zfs_arc_max | Maximum size of the ARC in bytes. | 0 (~50% RAM) | 75% RAM |
| zfs_arc_meta_balance | Increasing this value can improve performance if the workload is metadata-op heavy, at the cost of less file data fitting in the ARC. The default of 500 would prefer metadata 5x over data. | 500 | 500+ |
| metaslab_debug_unload | This option prevents ZFS from unloading the spacemaps from a metaslab once it is read in. Unless you've noticed significant overhead from loading in spacemaps, you probably don't need this. | 0 | 1 |
For a comprehensive description of all available ZFS module parameters, refer to the module parameters docs.