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Get rid of "full history". You can now configure how many back ledgers you want to retrieve

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on startup. The default is 256. The configuration element is "ledger_history". Valid values are:
0/off/false/none = don't retrieve any history
on/full/yes/-1 = retrieve all history back to the genesis ledger
<number> = retrieve that number of past ledgers
This commit is contained in:
JoelKatz
2012-11-29 11:33:33 -08:00
parent 87ee255251
commit 6d858ab178
4 changed files with 38 additions and 16 deletions
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28
src/cpp/ripple/LedgerMaster.cpp
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@@ -152,8 +152,19 @@ void LedgerMaster::missingAcquireComplete(LedgerAcquire::pointer acq)
}
}
void LedgerMaster::setFullLedger(Ledger::ref ledger)
static bool shouldAcquire(uint32 currentLedger, uint32 ledgerHistory, uint32 candidateLedger)
{
bool ret;
if (candidateLedger >= currentLedger)
ret = true;
else ret = (currentLedger - candidateLedger) <= ledgerHistory;
cLog(lsDEBUG) << "Missing ledger " << candidateLedger << (ret ? "will" : "will NOT") << " be acquired";
return ret;
}
void LedgerMaster::setFullLedger(Ledger::ref ledger)
{ // A new ledger has been accepted as part of the trusted chain
boost::recursive_mutex::scoped_lock ml(mLock);
mCompleteLedgers.setValue(ledger->getLedgerSeq());
@@ -161,7 +172,12 @@ void LedgerMaster::setFullLedger(Ledger::ref ledger)
if ((ledger->getLedgerSeq() != 0) && mCompleteLedgers.hasValue(ledger->getLedgerSeq() - 1))
{ // we think we have the previous ledger, double check
Ledger::pointer prevLedger = getLedgerBySeq(ledger->getLedgerSeq() - 1);
if (prevLedger && (prevLedger->getHash() != ledger->getParentHash()))
if (!prevLedger)
{
cLog(lsWARNING) << "Ledger " << ledger->getLedgerSeq() - 1 << " missing";
mCompleteLedgers.clearValue(ledger->getLedgerSeq() - 1);
}
else if (prevLedger->getHash() != ledger->getParentHash())
{
cLog(lsWARNING) << "Ledger " << ledger->getLedgerSeq() << " invalidates prior ledger";
mCompleteLedgers.clearValue(prevLedger->getLedgerSeq());
@@ -171,7 +187,7 @@ void LedgerMaster::setFullLedger(Ledger::ref ledger)
if (mMissingLedger && mMissingLedger->isComplete())
mMissingLedger.reset();
if (mMissingLedger || !theConfig.FULL_HISTORY)
if (mMissingLedger || !theConfig.LEDGER_HISTORY)
return;
if (Ledger::getPendingSaves() > 3)
@@ -183,13 +199,17 @@ void LedgerMaster::setFullLedger(Ledger::ref ledger)
// see if there's a ledger gap we need to fill
if (!mCompleteLedgers.hasValue(ledger->getLedgerSeq() - 1))
{
if (!shouldAcquire(mCurrentLedger->getLedgerSeq(), theConfig.LEDGER_HISTORY, ledger->getLedgerSeq() - 1))
return;
cLog(lsINFO) << "We need the ledger before the ledger we just accepted";
acquireMissingLedger(ledger->getParentHash(), ledger->getLedgerSeq() - 1);
}
else
{
uint32 prevMissing = mCompleteLedgers.prevMissing(ledger->getLedgerSeq());
if (prevMissing != RangeSet::RangeSetAbsent)
if (prevMissing == RangeSet::RangeSetAbsent)
return;
if (shouldAcquire(mCurrentLedger->getLedgerSeq(), theConfig.LEDGER_HISTORY, prevMissing))
{
cLog(lsINFO) << "Ledger " << prevMissing << " is missing";
assert(!mCompleteLedgers.hasValue(prevMissing));