MSDP tuning considerations
The default MSDP configuration, defined in the contentrouter.cfg file should work for most of the installations, in particular for storage pool size 95 TB or less and moderate workload environments.
For large servers that need to support a high number of concurrent jobs (400 or above) and a storage pool larger than 256 TB, some tunings listed in the following table may be necessary.
Table: MSDP tuning considerations
Parameter | Default value | Recommended value | Purpose |
|---|---|---|---|
MaxCacheSize | 75% on older NeBackup versions | 50% | Limit the maximum amount of RAM used for fingerprint caching to 50% of the RAM. |
MaxConnections | 3000 | 8192 | Supporting large numbers of concurrent jobs. |
AllocationUnitSize | 2MiB | 8MiB | To avoid MSDP engine crashes with stack overflow caused by the process exceeding the maximum number of memory map areas that a process may have. The maximum number is defined by the Linux kernel parameter, max_map_count. For systems with RAM size greater than 512 GB, this tuning parameter is highly recommended |