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only call the costly part of db checking when deep-indexing is needed

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csoler 2021-01-06 21:48:18 +01:00
parent 839a82450e
commit c3988e986f
1 changed files with 37 additions and 5 deletions
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36
libretroshare/src/gxs/rsgenexchange.cc
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@ -163,14 +163,46 @@ RsGenExchange::RsGenExchange(
{
mDataAccess = new RsGxsDataAccess(gds);
// Perform an early checking/cleaning of the db. Will eliminate groups and messages that do not match their hash
#ifdef RS_DEEP_CHANNEL_INDEX
// This code is only called because it of deep indexing in channels. But loading
// the entire set of messages in order to provide indexing is pretty bad (very costly and slowly
// eats memory, as many tests have shown. Not because of leaks, but because new threads are
// apparently attributed large stacks and pages of memory are not regained by the system maybe because it thinks
// that RS will use them again.
//
// * the deep check should be implemented differently, in an incremental way. For instance in notifyChanges() of each
// service (e.g. channels here) should update the index when a new message is received. The question to how old messages
// are processed is open. I believe that they shouldn't. New users will progressively process them.
//
// * integrity check (re-hashing of message data) is not needed. Message signature already ensures that all messages received are
// unalterated. The only problem (possibly very rare) is that a message is locally corrupted and not deleted (because of no check).
// It will therefore never be replaced by the correct one from friends. The cost of re-hashing the whole db data regularly
// doesn't counterbalance such a low risk.
//
if(mServType == RS_SERVICE_GXS_TYPE_CHANNELS)
{
std::vector<RsGxsGroupId> grpsToDel;
GxsMsgReq msgsToDel;
RsGxsSinglePassIntegrityCheck::check(mServType,mGixs,mDataStore,
#ifdef RS_DEEP_CHANNEL_INDEX
this, mSerialiser,
#endif
grpsToDel,msgsToDel);
for(auto& grpId: grpsToDel)
{
uint32_t token2=0;
deleteGroup(token2,grpId);
}
if(!msgsToDel.empty())
{
uint32_t token1=0;
deleteMsgs(token1,msgsToDel);
}
}
#endif
}
void RsGenExchange::setNetworkExchangeService(RsNetworkExchangeService *ns)