чт, 7 окт. 2021 г. в 11:47, Dimitry Sibiryakov <s...@ibphoenix.com>: > > Roman Simakov wrote 06.10.2021 21:49: > >> How are data moved? > >> > >> Under transaction control? > >> > >> In background (and interruptible) like db crypt? > > it's a dfw operation with EX database lock. I hope to relax this > > limitation later. So there are no concurrent changes. > > 1) copy all data pages > > 2) switch RDB$POINTER_PAGE and RDB$ROOT_PAGE transactionally > > 3) Rebuild RDB$PAGES > > 4) clear old data pages (as post-dfw operation) > > > > It can be interrupted but not resumed. I'm afraid it starts from the > > beginning. > > > > I guess it's better to discuss in a context of PR. > > Tablespaces has meaning for large databases only that don't fit into single > storage (terrabytes). For such volumes this algorithm is no-go. Better not to > have move option in the initial implementation at all.
Let's eat an elephant one bite at a time -- Roman Simakov Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
