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attempt to write to system keys with snapshot

This commit is contained in:
Jon Fu 2020-09-02 15:17:54 -04:00
parent 9c130b5ea2
commit d334b6484e
3 changed files with 19 additions and 0 deletions
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2
fdbclient/SystemData.cpp
View File

@ -1062,4 +1062,6 @@ const KeyRangeRef testOnlyTxnStateStorePrefixRange(
);
const KeyRef writeRecoveryKey = LiteralStringRef("\xff/writeRecovery");
const ValueRef writeRecoveryKeyTrue = LiteralStringRef("1");
const ValueRef writeRecoveryKeyFalse = LiteralStringRef("0");
const KeyRef snapshotEndVersionKey = LiteralStringRef("\xff/snapshotEndVersion");

1
fdbclient/SystemData.h
View File

@ -398,6 +398,7 @@ extern const KeyRangeRef testOnlyTxnStateStorePrefixRange;
// Snapshot + Incremental Restore
extern const KeyRef writeRecoveryKey;
extern const ValueRef writeRecoveryKeyTrue, writeRecoveryKeyFalse;
extern const KeyRef snapshotEndVersionKey;
#pragma clang diagnostic pop

16
fdbserver/DataDistribution.actor.cpp
View File

@ -4728,6 +4728,22 @@ static std::set<int> const& normalDataDistributorErrors() {
ACTOR Future<Void> ddSnapCreateCore(DistributorSnapRequest snapReq, Reference<AsyncVar<struct ServerDBInfo>> db ) {
state Database cx = openDBOnServer(db, TaskPriority::DefaultDelay, true, true);
state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
TraceEvent("SnapDataDistributor_WriteFlagAttempt")
.detail("SnapPayload", snapReq.snapPayload)
.detail("SnapUID", snapReq.snapUID);
tr->set(writeRecoveryKey, writeRecoveryKeyTrue);
wait(tr->commit());
break;
} catch (Error& e) {
TraceEvent("SnapDataDistributor_WriteFlagError").error(e);
wait(tr->onError(e));
}
}
TraceEvent("SnapDataDistributor_SnapReqEnter")
.detail("SnapPayload", snapReq.snapPayload)
.detail("SnapUID", snapReq.snapUID);