Block-level resume
Creation Date: October 17, 2005
Revision Date: September 15, 2017
Product: DS‑Client
Summary
Block-Level Resume allows a backup to continue from the last successful file block backed up in the session. Supported backup sets configured to use the DS-Client buffer automatically benefit from the Block-Level Resume feature if the DS-System has received at least 100 MB of compressed data for a file. The benefit increases with the size of the file being backed up. Without this feature a backup of a large file that is interrupted due to a lost connection would have to restart from the beginning of the file.
NOTE: When Block-Level Resume is not used, the resume occurs at the file-level.
If the backup process is interrupted (e.g. the connection to DS-System is lost), DS-Client will attempt to reconnect a specified number of times to resume the backup. The default number of reconnection attempts is 3. For more information, see
“Configuring the parameter settings”.
NOTE: For best results, we recommend that you configure the interval between reconnection attempts to be at least 5 minutes.
The following backup sets support the Block-Level Resume feature:
Windows DS-Client:
• File system
• Email message
• Microsoft SQL Server
• Microsoft Exchange Server
• Oracle Server database
• Permissions only
Linux DS-Client:
• Local File System
• UNIX-SSH
• NFS
• IBM DB2 database
• Oracle MySQL database
• Oracle Server database
• Permissions only
• PostgreSQL database
Mac DS-Client:
• Local File System
• UNIX-SSH
• NFS
• Oracle MySQL database
• Permissions only
• PostgreSQL database