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do a bit less work in the normal case (#5695)

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Summary:
i.e. if alive logfile is not being moved to archive while we are in GetSortedWalsOfType()
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5695

Differential Revision: D17279489

Pulled By: vjnadimpalli

fbshipit-source-id: 02bcf920a75b812edba8b87c6079b4e6fd5e683c
This commit is contained in:
jsteemann 2019-09-10 09:40:21 -07:00 committed by Facebook Github Bot
parent 699e1b5ede
commit 4d945c57ac
1 changed files with 10 additions and 9 deletions
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19
db/wal_manager.cc
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@ -312,14 +312,15 @@ Status WalManager::GetSortedWalsOfType(const std::string& path,
uint64_t size_bytes;
s = env_->GetFileSize(LogFileName(path, number), &size_bytes);
// re-try in case the alive log file has been moved to archive.
std::string archived_file = ArchivedLogFileName(path, number);
if (!s.ok() && log_type == kAliveLogFile &&
env_->FileExists(archived_file).ok()) {
s = env_->GetFileSize(archived_file, &size_bytes);
if (!s.ok() && env_->FileExists(archived_file).IsNotFound()) {
// oops, the file just got deleted from archived dir! move on
s = Status::OK();
continue;
if (!s.ok() && log_type == kAliveLogFile) {
std::string archived_file = ArchivedLogFileName(path, number);
if (env_->FileExists(archived_file).ok()) {
s = env_->GetFileSize(archived_file, &size_bytes);
if (!s.ok() && env_->FileExists(archived_file).IsNotFound()) {
// oops, the file just got deleted from archived dir! move on
s = Status::OK();
continue;
}
}
}
if (!s.ok()) {
@ -388,7 +389,7 @@ Status WalManager::ReadFirstRecord(const WalFileType type,
if (type == kAliveLogFile) {
std::string fname = LogFileName(db_options_.wal_dir, number);
s = ReadFirstLine(fname, number, sequence);
if (env_->FileExists(fname).ok() && !s.ok()) {
if (!s.ok() && env_->FileExists(fname).ok()) {
// return any error that is not caused by non-existing file
return s;
}