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# AtoM Upgrade

Siehe auch https://www.accesstomemory.org/de/docs/2.7/admin-manual/installation/upgrading/#installation-upgrading

  - backup Data and DB
  - get new AtoM-Version and save to `/usr/share/nginx/atom[version number]` [https://www.accesstomemory.org/de/docs/2.6/admin-manual/installation/linux/ubuntu-bionic/#option-1-download-the-tarball|link](download tarball)
  - create new DB named `atom[version number]`
  - grant access to the DB for the already existing mysql user `atomuser`
  - run Webinstaller. in case of 504 error, increase timeout. see https://groups.google.com/g/ica-atom-users/c/LKVkkvT1DkY/m/nVuzUQKJCwAJ
  - import old DB (only tables, not DB itself) 
  - run upgrade task: `php -d memory_limit=-1 symfony tools:upgrade-sql`
  - regenerate digiteal object reference and thumbnail: `php symfony digitalobject:regen-derivatives`
  - restart services, clear cache
  - repopulate search