https://fedoraproject.org/wiki/Changes/NSSDBMRemoval == Summary == Network Security Services (NSS) historically supports 2 different database backends, based on SQLite and dbm. Since Fedora 28, the SQLite backend has been used by default and the dbm backend has been deprecated ([[Changes/NSSDefaultFileFormatSql|NSS Default File Format SQL]]). This Change is about removing the support for the dbm backend entirely. == Owner == * Name: [[User:ueno| Daiki Ueno]] * Email: dueno(a)redhat.com == Detailed Description == Applications that use the NSS library often use a database for storage of keys, certificates and trust. NSS supports two different storage formats, one is based on SQLite and another one is based on dbm files. Today's default file format used by NSS, used when applications omit the type parameter, is the SQLite file format, and the older dbm format has been considered as deprecated since Fedora 28, because it has several drawbacks such as lack of support for parallel access to the storage. As the default change was made 2 years ago, and NSS provides a transparent migration mechanism from the dbm format to the SQLite format, the suggestion is to completely disable the dbm backend. == Benefit to Fedora == There are a few benefits: * By disabling the dbm database, the size of the library binary will be slightly smaller * The NSS developers will be able to focus on the new file format == Scope == * Proposal owners: A build time environment variable (NSS_DISABLE_DBM) needs to be set. * Other developers: N/A * Policies and guidelines: N/A (not a System Wide Change) * Trademark approval: N/A (not needed for this Change) == Upgrade/compatibility impact == The impact should be limited, as long as the users always update from the previous version. That would ensure the existing databases on the system are properly migrated. Therefore, we propose this as a Self Contained Change, rather than a System Wide Change.

In the discussion on the fedora-devel list, it was pointed that pesign package embedded the dbm format database. It has now been resolved in [https://bugzilla.redhat.com/show_bug.cgi?id=1827902 bug 1827902]. == How To Test == N/A (not a System Wide Change) == User Experience == No user visible changes. == Dependencies == N/A (not a System Wide Change) == Contingency Plan == * Contingency mechanism: Revert the shipped configuration * Contingency deadline: N/A (not a System Wide Change) * Blocks release? No -- Ben Cotton He / Him / His Senior Program Manager, Fedora & CentOS Stream Red Hat TZ=America/Indiana/Indianapolis _______________________________________________ devel-announce mailing list -- devel-announce(a)lists.fedoraproject.org To unsubscribe send an email to devel-announce-leave(a)lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel-announce@lists.fedora...

-----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEcwgJ58gsbV5f5dMcEV1auJxcHh4FAl7n12oACgkQEV1auJxc Hh69AhAAqMcmdCbus8WJVDLeNcLl2o9jIMWGgcIzPcz0wrC70yGG46mkrlD47h/s c3ZuzhiCWi3xZ9NHOwkWpF46DJE9ac5/4bJjxv6doJNfRCoUIgdTYQpmXoYzWXqq mfQK8f2qD2PHaBkK+0Cq2z9TJ/7xigsPKxHPDbzwfjOV4IodTk/0RO6SxsdF6Y2V rOeaPVp+Lf+QRMKVGwpkRidMxwKxEsYN09MJc8yj9M+LL+lqepSzqB4oG1IevOlt 3xb1FG53W5WGe7SOEz4Gej3MVRt/YnZwsiIQD8ztEH8udp9+VBEEtyfVeNkcel0A t5Uq5sJccmWGARmua++4HC9lSPI92MbEITzePfBi8yPquXfhz7pBypKQ4922HarL 0Y4hj1D2hPCySXeFQ9sD0iccgcyew9a2Z/S//aCUIaMY2TTaqgPN2lo9MdD1MbFY r1YD24RA/ogSc+dyK01u354hsPvg0u/hfaZwmyBlXNLWmLu2nPHywhwrKbkPDppC G0dVqgHYSVVnFHuXmviuhWMyrUjiJJY7LDccXGrQEUoIAvU1nYw6HgWB7e/O8dwV OS+XOJDxlzdHolNxOXI+FUaL1r7MlbsAOAkFdS5lFBHSK81yU6BGn1KNPZ9K9z/T uFBZLsIr/T+/iT3pn+1N3DlLLXdAdw67N7MNh2mzwHWWIMv/6m4= =nJVu -----END PGP SIGNATURE-----

Hello Igor, Sorry for the delay. Igor Raits <ignatenkobrain(a)fedoraproject.org&gt; writes: > On Mon, 2020-06-15 at 16:10 -0400, Ben Cotton wrote: >> https://fedoraproject.org/wiki/Changes/NSSDBMRemoval >> >> == Summary == >> Network Security Services (NSS) historically supports 2 different >> database backends, based on SQLite and dbm. Since Fedora 28, the >> SQLite backend has been used by default and the dbm backend has been >> deprecated ([[Changes/NSSDefaultFileFormatSql|NSS Default File Format >> SQL]]). This Change is about removing the support for the dbm backend >> entirely. >> >> == Owner == >> * Name: [[User:ueno| Daiki Ueno]] >> * Email: dueno(a)redhat.com >> >> == Detailed Description == >> Applications that use the NSS library often use a database for >> storage >> of keys, certificates and trust. NSS supports two different storage >> formats, one is based on SQLite and another one is based on dbm >> files. >> >> Today's default file format used by NSS, used when applications omit >> the type parameter, is the SQLite file format, and the older dbm >> format has been considered as deprecated since Fedora 28, because it >> has several drawbacks such as lack of support for parallel access to >> the storage. >> >> As the default change was made 2 years ago, and NSS provides a >> transparent migration mechanism from the dbm format to the SQLite >> format, the suggestion is to completely disable the dbm backend. >> >> == Benefit to Fedora == >> There are a few benefits: >> * By disabling the dbm database, the size of the library binary will >> be slightly smaller >> * The NSS developers will be able to focus on the new file format >> >> == Scope == >> * Proposal owners: >> A build time environment variable (NSS_DISABLE_DBM) needs to be set. >> >> * Other developers: N/A >> * Policies and guidelines: N/A (not a System Wide Change) >> * Trademark approval: N/A (not needed for this Change) >> >> == Upgrade/compatibility impact == >> The impact should be limited, as long as the users always update from >> the previous version. That would ensure the existing databases on the >> system are properly migrated. Therefore, we propose this as a Self >> Contained Change, rather than a System Wide Change. > > Does it mean that people who upgrade from F31 to F33 will work just > fine? That should, as long as the NSS databases had been created or accessed with the default method (that is SQLite) on F31. On the other hand, if a database is created explicitly as dbm, it needs to be converted before upgrading to F33. If it is too worrisome, I'm willing to provide a script that checks if the databases on the known locations are already converted.