-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Walter,
On 9/18/18 11:24, Walter Underwood wrote: > 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. Thanks for the explanation. We recently re-built from source and it took about 10 minutes. If we can get better performance for a restore starting with a "backup" (which is likely), we'll probably go ahead and do that, with the understanding that the ultimate fallback is reload-from-source. When upgrading to a new version of Solr, what are the rules for when you have to discard your whole index and reload from source? We have been in the 7.x line since we began development and testing and have not had any reason to reload from source so far. (Well, except when we had to make schema changes.) Thanks, - -chris >> On Sep 18, 2018, at 8:15 AM, Christopher Schultz >> <ch...@christopherschultz.net> wrote: >> > 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/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAluhQlkACgkQHPApP6U8 pFgcyRAAm4/FeeGn3eGv4CwNVfc9GrsUYc4/YexdwRT7oFUgqTC2kYeegj/YAgm3 ZwgfLDkDL0HR51i/pp4UG8MDTB5NFtp8Jg6+JSE4SutAA72N6vnwnC1Z/T52i0xG OqT0lFKeIL7Tt5c0FffbAMx5rgbFkzWHNWgFFqYFB0WZEzj4JM6rmAiDqLunRGPA xAZUnZCRMXhcVZT0bmmnSGlyU+JHL0ZQrJD/WX4DOJo2ZyAvP7pSYBEU+nTfyjzJ kE3rx1W9o269yc052FJTk5rRADuHIdirQQ/SrUN3O7Nn7Hqqi2/6sqyM34CF6wmX IPv9frb/WTvXQ3nsFYmQVB1jEBBr5S+9pztO3jOtUbGGKCjBpVGDcOXJVBwEDzPW yII5EjpjkoYwVB6shUI2nfaM/Y6r4aQLrZO6A5FFePhQTm6BGa/i2i1A1uLqfvHY WMmv/QMYqXZu7hXW6l5NKpO1AtSKTZBq8iXi9BiOXSHNSxo9mT9kPLu40Uh63Gyp EHI/SfAPWNwOj01pkbyV+siyhAWBVWpolN1SinnW3ZR16Yddd2lRmNxdfVCC32pL OfRxrChtZ736kvm4ELzmUAUjITxpZf7AFgsrB6zyTlPRn/jvnW7sRsIsOa4BHdGC e4oCzK7waITu6jam4Zz6e3efyxSDfT2YZ7811L098mody1n2g5k= =PaVE -----END PGP SIGNATURE-----
