new heuristics - how are conversion choices saved

cybmole · 01-22-2011, 03:35 AM

new features look good.

however I have a geeky question about how they are saved.

I backup my entire calibre library regularly - if I were ( stupidly) to access the backup library with an older version of calibre, will it have any trouble reading structure detect / heuristc saved individual conversion records, as it will be looking for old-style & finding new style.

actually a more realistic scenario would be if I hit a but in 7.42 & had to roll back to 7.40 for a while - would it cope new option setting saved data ?

user_none · 01-22-2011, 09:40 AM

They would be ignored since they don't exist. Be careful with rolling back though. Going back a version or two usually isn't a problem but the metadata db from time to time gets an update and using a newer version of the metadata db with an older version of calibre is not supported.

01-22-2011, 03:35 AM	#1
cybmole Wizard Posts: 3,720 Karma: 1759970 Join Date: Sep 2010 Device: none	new heuristics - how are conversion choices saved new features look good. however I have a geeky question about how they are saved. I backup my entire calibre library regularly - if I were ( stupidly) to access the backup library with an older version of calibre, will it have any trouble reading structure detect / heuristc saved individual conversion records, as it will be looking for old-style & finding new style. actually a more realistic scenario would be if I hit a but in 7.42 & had to roll back to 7.40 for a while - would it cope new option setting saved data ?

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01-22-2011, 09:40 AM	#2
user_none Sigil & calibre developer Posts: 2,488 Karma: 1063785 Join Date: Jan 2009 Location: Florida, USA Device: Nook STR	They would be ignored since they don't exist. Be careful with rolling back though. Going back a version or two usually isn't a problem but the metadata db from time to time gets an update and using a newer version of the metadata db with an older version of calibre is not supported.

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