I sometimes need to attach different wallets to my Bitcoin Core instance only to use certain RPC calls. I do not need up to date transaction or balance information. Basically I only want to perform dumpwallet. Would it be feasible to add a startup mode where rescanning and other optional work is skipped? Maybe block verification could also be skipped.
Rescanning takes about 2h on my fairly recent CPU on an SSD. It would be very useful if this step could be skipped.
Maybe block verification could also be skipped.
At the least use -listen=0 -connect=0, so that no new blocks can come in.
What is preventing calling dumpwallet? Maybe the fix is to make it possible instead of adding -nowalletupdates?
What version are you using?
dumpwallet cannot be called until the initial rescan is done. Not sure if this was 0.15.1 or 0.16 but I don't think there was any change here.
Looks like this will be implemented. Nice!
I don't have a test environment handy at this point in time but I said it was not possible to call dumpwallet. Maybe you misread. I'm quite certain it was not possible.
I just started Bitcoin-Qt (official 0.16 release) with --datadir=/tmp and called dumpwallet... seems to work fine. I fail to see the issue here...
@jonasschnelli does this not use an empty data dir? There's nothing to rescan. Use a fully synced node and change the wallet to make it rescan for a long time.
The feature request didn't seem to attract much attention in the past. Also, the issue seems not important enough right now to keep it sitting around idle in the list of open issues.
Closing due to lack of interest. Pull requests with improvements are always welcome.