Configuration files to remove during an upgrade
When importing configuration into the DXP certain configuration files can be removed.
The following configuration files are created by the system during updates and can be removed. If you attempt to import any of these files via WebDAV you will receive an error.
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crawl_scheduler.cfg
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collection.state
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secondary-collection.cfg
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secondary-start-urls.cfg
The following old configuration files should be converted / removed:
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Any file with a .formextension
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any graphics/css/html file that is not included in the profiles web resources folder. If a profile has a service.thumbnail key set to a image file this should be removed, the image file located and uploaded as the result page’s thumbnail from the administration dashboard. 
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Any .groovy,.sh,.pl,.php,.pyfile. The custom logic within these files must be replaced if used.
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any auto completion CSV file that is generated by the update. 
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Any backup file - with a .bakextension, or containing a datestamp-XXXXXXXXXXX.cfge.g.kill_exact-201806231010.cfg
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best_bets.cfg- this is an old format best bets configuration file. Any rules contained within the file should be set up using the best bets UI in the administration dashboard, or converted into curator.json rules using the converter tool.
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collection.cfg.start_urls- if empty remove this file.
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contextual_navigation.cfg- this file was removed in v16. Configuration contained within the file should be merged intocollection.cfg/profile.cfg(should be automatically done by the upgrade utility).
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extra_search.*.cfg- this file was removed in v16. Configuration contained within the file should be merged intocollection.cfg/profile.cfg(should be automatically done by the upgrade utility).
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form_interaction.cfg- this file was removed in v16. Configuration contained within the file should be merged intocollection.cfg/profile.cfg(should be automatically done by the upgrade utility).
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meta.cfg- this file was removed in v16. Configuration contained within the file should be merged intocollection.cfg/profile.cfg(should be automatically done by the upgrade utility).
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quicklinks.cfg- this file was removed in v16. Configuration contained within the file should be merged intocollection.cfg/profile.cfgif it contains a keyquicklinks=enabled(should be automatically done by the upgrade utility).
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metamap.cfg- this file contains legacy metadata mappings. Can be deleted if there is ametadata-mappings.cfgfile. Upgrade utility should automatically convert this if there isn’t an updatedmetadata-mappings.cfg
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xml.cfg- this file contains legacy metadata mappings. Can be deleted if there is axml-index.cfgfile. Upgrade utility should automatically convert this if there isn’t an updatedxml-index.cfg
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faceted_navigation.cfgif contained in a collection level configuration folder. This file should exist in profile/results page folders.
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padre_opts.cfg- this should only exist in profile folders. Remove this file if the profile includes aprofile.cfgwith aquery_processor_optionskey. If there is noprofile.cfgor theprofile.cfgdoesn’t contain aquery_processor_optionskey then you need to copy anyquery_processor_optionsfrom the parent search package’scollection.cfginto theprofile.cfg, and then merge the values frompadre_opts.cfg. Any option that is set in bothpadre_opts.cfgandcollection.cfgshould set the value from thepadre_opts.cfg.
Other configuration files you might come across that can be deleted:
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query-spike-word-list.cfg,query-word-list.cfgandquery-zero-word-list.cfg- these files can be deleted.