It isn’t very clear from that page, but the two backup methods make a copy of the indexes in a commit-aware way. That is all. One method copies them to a new server, the other to files in the data directory.
Database backups generally have a separate backup format which is independent of the database version. For example, mysqldump generates a backup as SQL statements. The Solr backup is version-locked, because it is just a copy of the index files. People who are used to database backups might be very surprised when they could not load a Solr backup into a server with a different version or on a different architecture. The only version-independent restore in Solr is to reload the data from the source repository. wunder Walter Underwood wun...@wunderwood.org http://observer.wunderwood.org/ (my blog) > On Sep 18, 2018, at 8:15 AM, Christopher Schultz > <ch...@christopherschultz.net> wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Walter, > > On 9/17/18 11:39, Walter Underwood wrote: >> Do not use Solr as a database. It was never designed to be a >> database. It is missing a lot of features that are normal in >> databases. >> >> [...] * no real backups (Solr backup is a cold server, not a >> dump/load) > > I'm just curious... if Solr has "no real backups", why is there a > complete client API for performing backups and restores? > > https://lucene.apache.org/solr/guide/7_4/making-and-restoring-backups.ht > ml > > Thanks, > - -chris > -----BEGIN PGP SIGNATURE----- > Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ > > iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAluhFp8ACgkQHPApP6U8 > pFgnhBAAre3Zb2mu++WVmY6rZlcc3uoRkDRva6iR602wA/w/EUabCmHEkO9maYEm > NoUREgBH9NtFPvYnjkEEL7/P/2hUErvRw0RfwsAo89ClYjjyMEH25+p5SNmudUmK > fKRSLRUyCbpE8ahKTPG44gRlki03uJJ2GA0r3vbTLvdqm1p5KO6sE4k/r3IYJ0QI > qZfUY4Un+LQ5vGMQ7qeGRcFhaAXVOaJmnLCRqGTS2hMTM1uM01TCblhOaeX5XHYD > Yra4m15Sr1H8p3S0CFsP8oqvDND0jEC4MxM9mQvHOvq9IwMreTSwACga35Wm6ItD > h1/Td9H/Puo8o9vQMaVfNcFD4TAqt+FkIHzQEb+FkQAMfbC9ZHsmBgvl8EUtPBq1 > h2ODETEcD5SsmdfrP5OWUz+0OBhH7/HEgWRjHW9nSMzhPn4kYgpF/7VuFL8iy3re > /8TviTf446I859QNragWXACdARhCzMo8AoXIs/dC70CGDvxuKmEcI6tad9Zsxcf2 > +yaFa3Fzddulaeao4juZVbRVJ9eewFOSawMXDc14TeL6t13CxzxFasHiYu0C5euV > XhKSWEHYj58ijS/KU4FMDCEWZhr1KWEKwfVp7hZ2CZZNW5kNPbv97otKvxB0cKyS > LTK6PtZoZbTWXFa8rT3yq28/x6gMULQeo0ZBZLTXEJKpfAT2vAU= > =Fh1S > -----END PGP SIGNATURE-----
