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我在與Cassandra數據庫長時間戰鬥後寫這個問題。我想插入Movie對象的大集合（〜1000000）：Cassnadra大集合嵌入C中的嵌套對象＃
public class Movie
{
public Guid Id { get; set; }
public string Title { get; set; }
public string Description { get; set; }
public int Year { get; set; }
public string Genres { get; set; }
public int Rating { get; set; }
public string OriginalLanguage { get; set; }
public string ProductionCountry { get; set; }
public int VotingsNumber { get; set; }
public Director Director { get; set; }
}
嵌套場導演：
public class Director
{
public Guid Id { get; set; }
public string Firstname { get; set; }
public string Lastname { get; set; }
public int Age { get; set; }
}
我使用DataStax C＃驅動程序和我綁不同的方式，但仍然一無所獲。目前我的代碼如下所示：
private void CreateSchema()
{
Session.Execute("CREATE KEYSPACE IF NOT EXISTS test WITH replication " +
"= {'class':'SimpleStrategy', 'replication_factor':3};");
Session.Execute("CREATE TYPE IF NOT EXISTS test.director (" +
"firstname text," +
"lastname text," +
"age int," +
");");
Session.Execute("CREATE TABLE IF NOT EXISTS test.Movies (" +
"id uuid," +
"title text," +
"description text," +
"year int," +
"genres text," +
"rating int," +
"originallanguage text," +
"productioncountry text," +
"votingsnumber int," +
"director frozen<director>," +
"PRIMARY KEY (id)" +
");");
}
public string TimeOfCollectionInsert(int collectionEntriesNumber)
{
var watch = new Stopwatch();
try
{
IList<Movie> moviesList = Movie.CreateMoviesCollectionForCassandra(collectionEntriesNumber);
var preparedStatements = new List<PreparedStatement>();
var statementBinding = new List<BoundStatement>();
for (int i = 0; i < collectionEntriesNumber; i++)
{
preparedStatements.Add(Session.Prepare("INSERT INTO test.Movies (id, title, description, year, genres, rating, originallanguage, productioncountry, votingsnumber, actors) VALUES (?,?,?,?,?,?,?,?,?,{ 'director': { firstname: 'DirectorName', lastname: 'DirectorLastname', age: 50 }});"));
}
for (int i = 0; i < collectionEntriesNumber; i++)
{
statementBinding.Add(preparedStatements[i].Bind(moviesList[i].Id, moviesList[i].Title, moviesList[i].Description, moviesList[i].Year, moviesList[i].Genres, moviesList[i].Rating, moviesList[i].OriginalLanguage, moviesList[i].ProductionCountry, moviesList[i].VotingsNumber));
}
watch.Start();
for (int i = 0; i < collectionEntriesNumber; i++)
{
Session.Execute(statementBinding[i]);
}
watch.Stop();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
return watch.ElapsedMilliseconds.ToString();
}
這兩種方法都能成功運行，但我想動態創建導向器。 我將不勝感激任何幫助。
btw。這是測量卡桑德拉大容量插入性能的好方法嗎？
感謝， P