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Add pruneblockchain RPC to enable manual block file pruning.

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mrbandrews
2016-11-29 12:39:19 -05:00
parent 5754e0341b
commit 1fc4ec7bf2
8 changed files with 207 additions and 24 deletions
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16
src/init.cpp
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@@ -351,9 +351,9 @@ std::string HelpMessage(HelpMessageMode mode)
#ifndef WIN32
strUsage += HelpMessageOpt("-pid=<file>", strprintf(_("Specify pid file (default: %s)"), BITCOIN_PID_FILENAME));
#endif
strUsage += HelpMessageOpt("-prune=<n>", strprintf(_("Reduce storage requirements by pruning (deleting) old blocks. This mode is incompatible with -txindex and -rescan. "
strUsage += HelpMessageOpt("-prune=<n>", strprintf(_("Reduce storage requirements by enabling pruning (deleting) of old blocks. This allows the pruneblockchain RPC to be called to delete specific blocks, and enables automatic pruning of old blocks if a target size in MiB is provided. This mode is incompatible with -txindex and -rescan. "
"Warning: Reverting this setting requires re-downloading the entire blockchain. "
"(default: 0 = disable pruning blocks, >%u = target size in MiB to use for block files)"), MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024));
"(default: 0 = disable pruning blocks, 1 = allow manual pruning via RPC, >%u = automatically prune block files to stay under the specified target size in MiB)"), MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024));
strUsage += HelpMessageOpt("-reindex-chainstate", _("Rebuild chain state from the currently indexed blocks"));
strUsage += HelpMessageOpt("-reindex", _("Rebuild chain state and block index from the blk*.dat files on disk"));
#ifndef WIN32
@@ -936,12 +936,16 @@ bool AppInitParameterInteraction()
nScriptCheckThreads = MAX_SCRIPTCHECK_THREADS;
// block pruning; get the amount of disk space (in MiB) to allot for block & undo files
int64_t nSignedPruneTarget = GetArg("-prune", 0) * 1024 * 1024;
if (nSignedPruneTarget < 0) {
int64_t nPruneArg = GetArg("-prune", 0);
if (nPruneArg < 0) {
return InitError(_("Prune cannot be configured with a negative value."));
}
nPruneTarget = (uint64_t) nSignedPruneTarget;
if (nPruneTarget) {
nPruneTarget = (uint64_t) nPruneArg * 1024 * 1024;
if (nPruneArg == 1) { // manual pruning: -prune=1
LogPrintf("Block pruning enabled. Use RPC call pruneblockchain(height) to manually prune block and undo files.\n");
nPruneTarget = std::numeric_limits<uint64_t>::max();
fPruneMode = true;
} else if (nPruneTarget) {
if (nPruneTarget < MIN_DISK_SPACE_FOR_BLOCK_FILES) {
return InitError(strprintf(_("Prune configured below the minimum of %d MiB. Please use a higher number."), MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024));
}