Have you considered using the "multiple data files" mode of par2?
Jakob Bohm via Duplicity-talk <[email protected]>
| Newsgroups | gmane.comp.sysutils.backup.duplicity.general |
|---|---|
| Organization | WiseMo A/S |
| Message-ID | <[email protected]> |
Dear Duplicity backup format designer, According to the par2 man page (at least on Debian 12), the par2 command has two distinct operating modes. One mode creates one or more small parity files for a single data file stored on an imperfect medium or service. The other, processes a group of N data files (such as Duplicity volumes) to produce a few shared parity files. This second mode is described in the man page under the subheading "CREATING PAR2 FILES FOR MULTIPLE DATA FILES" . Switching to the "multiple data files" mode constitutes a change in the backup format and thus needs to be guarded with appropriate compatibility logic in order to restore backups made with either method, even from damaged storage (where par2 files are actually needed) . To keep a desired robustness level and a manageable temp volume size on the client, it is probably necessary to set an internal limit on the number of volumes for each par2 run . For example if that limit is 99, the temp volume needs to store about 100 times the volume size even if not pipelining the creation of later volumes in parallel with par2 processing and upload. Enjoy Jakob -- Jakob Bohm, CIO, Partner, WiseMo A/S. https://www.wisemo.com Transformervej 29, 2860 Søborg, Denmark. Direct +45 31 13 16 10 This public discussion message is non-binding and may contain errors. WiseMo - Remote Service Management for PCs, Phones and Embedded _______________________________________________ Duplicity-talk mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/duplicity-talk