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/** |
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* This file is part of the CernVM File System. |
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* |
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* Rotates the statistics database for a CernVM-FS repository. This is |
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* intended to be called from logrotate instead of the system sqlite3 binary, |
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* so that the vendored SQLite (which supports VACUUM INTO) is used regardless |
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* of the system SQLite version. |
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*/ |
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#include "swissknife_rotate_statsdb.h" |
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#include <string> |
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#include <unistd.h> |
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#include "sql.h" |
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#include "statistics_database.h" |
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#include "util/logging.h" |
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#include "util/posix.h" |
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namespace swissknife { |
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ParameterList CommandRotateStatsDB::GetParams() const { |
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ParameterList r; |
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r.push_back(Parameter::Mandatory('p', "path to the stats.db file")); |
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return r; |
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} |
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int CommandRotateStatsDB::Main(const ArgumentList &args) { |
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const std::string db_path = *args.find('p')->second; |
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const std::string archive_path = db_path + ".archive"; |
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if (!FileExists(db_path)) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "stats.db not found: %s", |
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db_path.c_str()); |
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return 1; |
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} |
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// Remove any existing archive so VACUUM INTO can write a fresh one |
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if (FileExists(archive_path)) { |
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if (unlink(archive_path.c_str()) != 0) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "failed to remove existing archive: %s", |
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archive_path.c_str()); |
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return 1; |
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} |
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} |
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StatisticsDatabase *db = |
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StatisticsDatabase::Open(db_path, StatisticsDatabase::kOpenReadWrite); |
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if (db == NULL) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "failed to open statistics database: %s", |
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db_path.c_str()); |
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return 1; |
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} |
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// VACUUM INTO creates a compacted copy of the current database |
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const std::string vacuum_into = |
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"VACUUM INTO '" + archive_path + "';"; |
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if (!sqlite::Sql(db->sqlite_db(), vacuum_into).Execute()) { |
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LogCvmfs(kLogCvmfs, kLogStderr, |
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"VACUUM INTO failed for %s: %s", |
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db_path.c_str(), db->GetLastErrorMsg().c_str()); |
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delete db; |
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return 1; |
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} |
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// Clear all rows from the live database |
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if (!sqlite::Sql(db->sqlite_db(), |
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"DELETE FROM publish_statistics;").Execute()) { |
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LogCvmfs(kLogCvmfs, kLogStderr, |
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"failed to clear publish_statistics in %s: %s", |
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db_path.c_str(), db->GetLastErrorMsg().c_str()); |
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delete db; |
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return 1; |
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} |
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if (!sqlite::Sql(db->sqlite_db(), |
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"DELETE FROM gc_statistics;").Execute()) { |
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LogCvmfs(kLogCvmfs, kLogStderr, |
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"failed to clear gc_statistics in %s: %s", |
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db_path.c_str(), db->GetLastErrorMsg().c_str()); |
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delete db; |
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return 1; |
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} |
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// Reclaim space freed by the DELETEs |
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if (!db->Vacuum()) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "VACUUM failed for %s: %s", |
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db_path.c_str(), db->GetLastErrorMsg().c_str()); |
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delete db; |
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return 1; |
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} |
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LogCvmfs(kLogCvmfs, kLogStdout, |
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"Rotated statistics database: %s -> %s", |
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db_path.c_str(), archive_path.c_str()); |
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delete db; |
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return 0; |
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} |
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} // namespace swissknife |
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