Question & Answer
Question
What file attributes are checked for changes by the Tivoli Storage Manager Client on UNIX operating systems during incremental backups?
Answer
The following table outlines each of the attributes checked by the client to determine if a file has changed;
| Attribute | Attribute Description | Action if different |
| ctime | Change Time | Backup File |
| mtime | Modify Time | Backup File |
| atime | Access Time | Metadata Update |
| File mode OCT | Mode | Metadata Update |
| uid | User ID Owner | Metadata Update |
| gid | Group ID Owner | Metadata Update |
| size | Size | Backup File |
| ACL size | ACL Size | Backup File |
| ACL checksum | ACL Checksum Value | Backup File |
| Xattr size | Extended Attribute Size | Backup File |
| Xattr checksum | Extended Attribute Checksum | Backup File |
| inode | Inode | Metadata Update |
Also noted in the above table is the action the client takes if a certain attribute has changed. Sometimes the client will drive a metadata update for the object to the server. Other times it will back up the file again.
NOTE: The above table is only a sample for normal client incremental backup processing. Certain options and filesystem types may affect the client action.
[{"Product":{"code":"SSGSG7","label":"Tivoli Storage Manager"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Component":"Client","Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"All Supported Versions","Edition":"","Line of Business":{"code":"LOB26","label":"Storage"}}]
Product Synonym
ITSM ADSM TSM Spectrum Protect
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Document Information
Modified date:
17 June 2018
UID
swg21448429