/*
* Open environment, database and write data into database.
* Generated log files are put under testHome.
*/
public void Logging(string home, string dbName,
out DatabaseEnvironment env, out RecnoDatabase recnoDB)
{
string dbFileName = dbName + ".db";
Configuration.ClearDir(home);
// Open environment with logging subsystem.
DatabaseEnvironmentConfig envConfig =
new DatabaseEnvironmentConfig();
envConfig.Create = true;
envConfig.UseLogging = true;
envConfig.LogSystemCfg = new LogConfig();
envConfig.LogSystemCfg.FileMode = 755;
envConfig.LogSystemCfg.ZeroOnCreate = true;
envConfig.UseMPool = true;
env = DatabaseEnvironment.Open(home, envConfig);
/*
* Open recno database, write 100000 records into
* the database and close it.
*/
RecnoDatabaseConfig recnoConfig =
new RecnoDatabaseConfig();
recnoConfig.Creation = CreatePolicy.IF_NEEDED;
recnoConfig.Env = env;
// The db needs mpool to open.
recnoConfig.NoMMap = false;
recnoDB = RecnoDatabase.Open(dbFileName,
recnoConfig);
for (int i = 0; i < 1000; i++)
recnoDB.Append(new DatabaseEntry(
ASCIIEncoding.ASCII.GetBytes("key")));
}
public void ModifyRecordsInDB(RecnoDatabase db,
Transaction txn)
{
uint[] recnos = new uint[100];
if (txn == null)
{
// Add a lot of records into database.
for (int i = 0; i < 100; i++)
recnos[i] = db.Append(new DatabaseEntry(
new byte[10240]));
// Remove some records from database.
for (int i = 30; i < 100; i++)
db.Delete(new DatabaseEntry(
BitConverter.GetBytes(recnos[i])));
}
else
{
// Add a lot of records into database in txn.
for (int i = 0; i < 100; i++)
recnos[i] = db.Append(new DatabaseEntry(
new byte[10240]), txn);
// Remove some records from database in txn.
for (int i = 30; i < 100; i++)
db.Delete(new DatabaseEntry(
BitConverter.GetBytes(recnos[i])), txn);
}
}
