About the last backups of clients
The NetBackup Deduplication Manager (spad) tracks the most recent backups of the clients. By default, these last backups are recorded in a cache file named __dofpcachefile__ for each client and policy combination.
The tracked last backups are used in the following scenarios:
To populate the client-side fingerprint cache when a backup job for a client starts.
To populate the server-side fingerprint cache when the FPCacheWithImageSet option is enabled in
contentrouter.cfg
See MSDP fingerprint cache behavior options.
The following table describes the parameters that control the behavior of how the last backups are used. These parameters are defined under the StorageDatabase section in the <storage_path>/etc/puredisk/spa.cfg file.
Table: Last backup parameters
Parameter | Description |
|---|---|
LastFullMaxImageCount | The maximum number of last images that return to a client in a job. The default value is 100. |
LastFullMaxImageCountSmallDO | The maximum number of small fragments that return to a client in a job. The default value is 32. |
LastFullSmallDOSize | The value defines a small fragment, in bytes. The default value is 20971520 (20 MiB). |