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WriteUnPrepared: Enable auto-compaction after max_evicted_seq_ init (#5128)

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Summary:
Compaction would depend on max_evicted_seq_ value. The ::Initialize method should do that after max_evicted_seq_ is properly initialized. The patch also back ports #4853 from WritePrepared txn to WriteUnPrepared.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5128

Differential Revision: D14686562

Pulled By: maysamyabandeh

fbshipit-source-id: b2355025712a72676ac3b20a95258adcf4774490
This commit is contained in:
Maysam Yabandeh 2019-03-29 13:09:51 -07:00 committed by Facebook Github Bot
parent f29dc1b906
commit a703f16da9
1 changed files with 15 additions and 6 deletions
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21
utilities/transactions/write_unprepared_txn_db.cc
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@ -234,11 +234,6 @@ Status WriteUnpreparedTxnDB::Initialize(
compaction_enabled_cf_handles.push_back(handles[index]);
}
Status s = EnableAutoCompaction(compaction_enabled_cf_handles);
if (!s.ok()) {
return s;
}
// create 'real' transactions from recovered shell transactions
auto rtxns = dbimpl->recovered_transactions();
for (auto rtxn : rtxns) {
@ -270,7 +265,7 @@ Status WriteUnpreparedTxnDB::Initialize(
real_trx->SetLogNumber(first_log_number);
real_trx->SetId(first_seq);
s = real_trx->SetName(recovered_trx->name_);
Status s = real_trx->SetName(recovered_trx->name_);
if (!s.ok()) {
break;
}
@ -308,6 +303,20 @@ Status WriteUnpreparedTxnDB::Initialize(
SequenceNumber prev_max = max_evicted_seq_;
SequenceNumber last_seq = db_impl_->GetLatestSequenceNumber();
AdvanceMaxEvictedSeq(prev_max, last_seq);
// Create a gap between max and the next snapshot. This simplifies the logic
// in IsInSnapshot by not having to consider the special case of max ==
// snapshot after recovery. This is tested in IsInSnapshotEmptyMapTest.
if (last_seq) {
db_impl_->versions_->SetLastAllocatedSequence(last_seq + 1);
db_impl_->versions_->SetLastSequence(last_seq + 1);
db_impl_->versions_->SetLastPublishedSequence(last_seq + 1);
}
// Compaction should start only after max_evicted_seq_ is set.
Status s = EnableAutoCompaction(compaction_enabled_cf_handles);
if (!s.ok()) {
return s;
}
// Rollback unprepared transactions.
for (auto rtxn : rtxns) {