static void test_db_tablecreate(string[] words)
{
try
{
Console.WriteLine("test db table");
using (var snap = db.UseSnapShot())
{
var writetask = db.CreateWriteTask();
{
var info = new TableInfo(
new byte[] { 0x01, 0x02, 0x03 }, //tableid 是区分表格的数据，至少长度2，太短的不允许
//下面三个参数都是提供表的信息，无所谓什么
"mytable", //tablename
"testtable0001", //tabledesc
DBValue.Type.String //tablekeytype
);
writetask.CreateTable(info);
for (var i = 0; i < 100; i++)
{
var key = ("key" + i).ToBytes_UTF8Encode();
writetask.Put(new byte[] { 0x01, 0x02, 0x03 }, key, DBValue.FromValue(DBValue.Type.UINT32, (UInt32)i));
}
db.Write(writetask);
}
}
Console.WriteLine("create table and write 100 item.");
}
catch (Exception err)
{
Console.WriteLine("error:" + err.Message);
}
}
static void test_db_checkpoint(string[] words)
{
//建立当前数据库的副本
db.CheckPoint("d:\\db_cp001");
//根据rocksdb的说明，这个建立副本贼鸡儿高效
//然后就从这个数据库读了，这是作为历史记录的数据库，对他只读，别去瞎几把改
var db2 = new LightDB();
db2.OpenRead("d:\\db_cp001");
var snap = db2.UseSnapShot();
var table = snap.GetTableInfo(new byte[] { 01, 02, 03 });
Console.WriteLine("db2 table=" + table.tablename);
Console.WriteLine("db2 dataheight=" + snap.DataHeight);
}