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Sync MANIFEST before closing in db_impl when creating a new DB.

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Add logging with debugging information when failing to load a version set.

PiperOrigin-RevId: 351432332
This commit is contained in:
leveldb Team 2021-01-12 21:08:52 +00:00 committed by Victor Costan
parent 8cce47e450
commit 8f1861462b
2 changed files with 11 additions and 0 deletions
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5
db/db_impl.cc
View File

@ -196,6 +196,9 @@ Status DBImpl::NewDB() {
std::string record;
new_db.EncodeTo(&record);
s = log.AddRecord(record);
if (s.ok()) {
s = file->Sync();
}
if (s.ok()) {
s = file->Close();
}
@ -301,6 +304,8 @@ Status DBImpl::Recover(VersionEdit* edit, bool* save_manifest) {
if (!env_->FileExists(CurrentFileName(dbname_))) {
if (options_.create_if_missing) {
Log(options_.info_log, "Creating DB %s since it was missing.",
dbname_.c_str());
s = NewDB();
if (!s.ok()) {
return s;

6
db/version_set.cc
View File

@ -898,6 +898,7 @@ Status VersionSet::Recover(bool* save_manifest) {
uint64_t log_number = 0;
uint64_t prev_log_number = 0;
Builder builder(this, current_);
int read_records = 0;
{
LogReporter reporter;
@ -907,6 +908,7 @@ Status VersionSet::Recover(bool* save_manifest) {
Slice record;
std::string scratch;
while (reader.ReadRecord(&record, &scratch) && s.ok()) {
++read_records;
VersionEdit edit;
s = edit.DecodeFrom(record);
if (s.ok()) {
@ -981,6 +983,10 @@ Status VersionSet::Recover(bool* save_manifest) {
} else {
*save_manifest = true;
}
} else {
std::string error = s.ToString();
Log(options_->info_log, "Error recovering version set with %d records: %s",
read_records, error.c_str());
}
return s;