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Clean rocksdb code

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This commit is contained in:
Andrea Cavalli 2021-07-06 22:27:03 +02:00
parent 2a47e6f3fd
commit c85dcfb54e
1 changed files with 14 additions and 55 deletions
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65
src/main/java/it/cavallium/dbengine/database/disk/LLLocalKeyValueDatabase.java
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@ -38,6 +38,7 @@ import org.rocksdb.DBOptions;
import org.rocksdb.DbPath;
import org.rocksdb.FlushOptions;
import org.rocksdb.LRUCache;
import org.rocksdb.MemoryUtil;
import org.rocksdb.Options;
import org.rocksdb.RateLimiter;
import org.rocksdb.RocksDB;
@ -121,9 +122,6 @@ public class LLLocalKeyValueDatabase implements LLKeyValueDatabase {
createIfNotExists(descriptors, rocksdbOptions, databaseOptions, dbPath, dbPathString);
// Create all column families that don't exist
createAllColumns(descriptors, rocksdbOptions, databaseOptions, dbPathString);
while (true) {
try {
// a factory method that returns a RocksDB instance
@ -181,9 +179,12 @@ public class LLLocalKeyValueDatabase implements LLKeyValueDatabase {
flushDb(db, handles);
for (ColumnFamilyHandle handle : handles) {
try {
handle.close();
} catch (Exception ex) {
logger.error("Can't close column family", ex);
}
}
try {
db.closeE();
} catch (RocksDBException ex) {
@ -204,11 +205,14 @@ public class LLLocalKeyValueDatabase implements LLKeyValueDatabase {
private void flushDb(RocksDB db, List<ColumnFamilyHandle> handles) throws RocksDBException {
// force flush the database
for (int i = 0; i < 2; i++) {
db.flush(new FlushOptions().setWaitForFlush(true).setAllowWriteStall(true), handles);
try (var flushOptions = new FlushOptions().setWaitForFlush(true).setAllowWriteStall(true)) {
db.flush(flushOptions);
}
try (var flushOptions = new FlushOptions().setWaitForFlush(true).setAllowWriteStall(true)) {
db.flush(flushOptions, handles);
}
db.flushWal(true);
db.syncWal();
}
// end force flush
}
@ -254,6 +258,7 @@ public class LLLocalKeyValueDatabase implements LLKeyValueDatabase {
// that determines the behaviour of the database.
var options = new Options();
options.setCreateIfMissing(true);
options.setCreateMissingColumnFamilies(true);
options.setCompactionStyle(CompactionStyle.LEVEL);
options.setTargetFileSizeBase(64 * 1024 * 1024); // 64MiB sst file
options.setTargetFileSizeMultiplier(2); // Each level is 2 times the previous level
@ -362,52 +367,6 @@ public class LLLocalKeyValueDatabase implements LLKeyValueDatabase {
return options;
}
private void createAllColumns(List<ColumnFamilyDescriptor> totalDescriptors,
Options options,
DatabaseOptions databaseOptions,
String dbPathString) throws RocksDBException {
if (databaseOptions.inMemory()) {
return;
}
List<byte[]> columnFamiliesToCreate = new LinkedList<>();
for (ColumnFamilyDescriptor descriptor : totalDescriptors) {
columnFamiliesToCreate.add(descriptor.getName());
}
List<byte[]> existingColumnFamilies = RocksDB.listColumnFamilies(options, dbPathString);
columnFamiliesToCreate.removeIf((columnFamilyName) -> {
for (byte[] cfn : existingColumnFamilies) {
if (Arrays.equals(cfn, columnFamilyName)) {
return true;
}
}
return false;
});
List<ColumnFamilyDescriptor> descriptors = new LinkedList<>();
descriptors.add(new ColumnFamilyDescriptor(RocksDB.DEFAULT_COLUMN_FAMILY));
for (byte[] existingColumnFamily : existingColumnFamilies) {
descriptors.add(new ColumnFamilyDescriptor(existingColumnFamily));
}
var handles = new LinkedList<ColumnFamilyHandle>();
/*
SkipStatsUpdateOnDbOpen = true because this RocksDB.open session is used only to add just some columns
*/
//var dbOptionsFastLoadSlowEdit = new DBOptions(options.setSkipStatsUpdateOnDbOpen(true));
this.db = RocksDB.open(new DBOptions(options), dbPathString, descriptors, handles);
for (byte[] name : columnFamiliesToCreate) {
db.createColumnFamily(new ColumnFamilyDescriptor(name)).close();
}
flushAndCloseDb(db, handles);
}
private void createInMemoryColumns(List<ColumnFamilyDescriptor> totalDescriptors,
DatabaseOptions databaseOptions,
List<ColumnFamilyHandle> handles)