Hey nostr:npub1y0emt2wlpsezcnmxtyrpf33qe7gwy5u8yzssvv6uw53em0k32t7q7smm9n, we want to, zero-downtime swap an #LMDB environment that comes from an S3 with one that is already on disk (and opened). My first idea was to open the incoming env, open a write txn on the dst one and clear and copy the entries into the existing one but I fear about the MDB_TXN_FULL error. The second idea is to close the env (awaiting running txns) and swap the env files. This can produce a downtime. Do you recommend anything else?
Discussion
nostr:npub1aza2n933qjucyr65phn5h8wu35kkdhxu90gl0a98jqxmg87krp2sp3c2m8 closing and swapping files seems your best bet. That's really only a couple syscalls, while copying the data could take substantial time. On non-Windows you could open the new env first and use it immediately, renaming later. Windows unfortunately can't rename an open file.