我们有一个在开发笔记本电脑上运行的 SQL 服务器，并且希望部署多台笔记本电脑并使用 Azure 同步将更改分发给每个用户。性能太慢，无法在我们当前的应用程序中使用远程 SQL 数据库——这是一个单独的问题。速度并不重要，而且我预计用户之间不会发生冲突。我将更新设置为 12 小时，并将冲突解决设置为成员(member)获胜。
一切似乎都按预期工作，除了 Microsoft SQL Data Sync 2.0 Windows 服务进程持续消耗 2%-5% 的 CPU 并持续以约 80 kbps 的速度传输数据。我担心笔记本电脑在野外时这会耗尽电池。有更好的方法吗？
这是 Azure 数据库的资源利用率。我在某个时刻停止了同步，看看频率设置是否会自动重新启动它(它不会)。
最佳答案
您可以根据需要编写自己的同步应用程序。 This和 this资源为您提供良好的指导。下面您将看到一个示例应用程序。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using Microsoft.Synchronization.Data.SqlServer;
using Microsoft.Synchronization.Data;
using Microsoft.Synchronization;
namespace SQLAzureDataSync
{
class Program
{
public static string sqlazureConnectionString = "Server=[Your SQL Azure Server].database.windows.net;Database=AdventureWorksLTSQLAzure;User ID=[Your SQL Azure User Name]@[Your SQL Azure Server];Password=[Your SQL Azure Password];Trusted_Connection=False;Encrypt=True;";
public static string sqllocalConnectionString = "Server=(local);Database=AdventureWorksLT2008;Trusted_Connection=True";
public static readonly string scopeName = "alltablesyncgroup";
static void Main(string[] args)
{
// Test if input arguments were supplied:
if (args.Length == 0)
{
System.Console.WriteLine("Please enter an argument.");
System.Console.WriteLine("Usage: SyncTest.exe -setup");
System.Console.WriteLine(" SyncTest.exe -sync");
}
else if (args[0] == "-setup")
Setup();
else if (args[0] == "-sync")
Sync();
}
public static void Setup()
{
try
{
SqlConnection sqlServerConn = new SqlConnection(sqllocalConnectionString);
SqlConnection sqlAzureConn = new SqlConnection(sqlazureConnectionString);
DbSyncScopeDescription myScope = new DbSyncScopeDescription(scopeName);
DbSyncTableDescription Customer = SqlSyncDescriptionBuilder.GetDescriptionForTable("Customer", sqlServerConn);
DbSyncTableDescription Product = SqlSyncDescriptionBuilder.GetDescriptionForTable("Product", sqlServerConn);
// Add the tables from above to the scope
myScope.Tables.Add(Customer);
myScope.Tables.Add(Product);
// Setup SQL Server for sync
SqlSyncScopeProvisioning sqlServerProv = new SqlSyncScopeProvisioning(sqlServerConn, myScope);
if (!sqlServerProv.ScopeExists(scopeName))
{
// Apply the scope provisioning.
Console.WriteLine("Provisioning SQL Server for sync " + DateTime.Now);
sqlServerProv.Apply();
Console.WriteLine("Done Provisioning SQL Server for sync " + DateTime.Now);
}
else
Console.WriteLine("SQL Server Database server already provisioned for sync " + DateTime.Now);
// Setup SQL Azure for sync
SqlSyncScopeProvisioning sqlAzureProv = new SqlSyncScopeProvisioning(sqlAzureConn, myScope);
if (!sqlAzureProv.ScopeExists(scopeName))
{
// Apply the scope provisioning.
Console.WriteLine("Provisioning SQL Azure for sync " + DateTime.Now);
sqlAzureProv.Apply();
Console.WriteLine("Done Provisioning SQL Azure for sync " + DateTime.Now);
}
else
Console.WriteLine("SQL Azure Database server already provisioned for sync " + DateTime.Now);
sqlAzureConn.Close();
sqlServerConn.Close();
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
public static void Sync()
{
try
{
SqlConnection sqlServerConn = new SqlConnection(sqllocalConnectionString);
SqlConnection sqlAzureConn = new SqlConnection(sqlazureConnectionString);
SyncOrchestrator orch = new SyncOrchestrator
{
LocalProvider = new SqlSyncProvider(scopeName, sqlAzureConn),
RemoteProvider = new SqlSyncProvider(scopeName, sqlServerConn),
Direction = SyncDirectionOrder.UploadAndDownload
};
Console.WriteLine("ScopeName={0} ", scopeName.ToUpper());
Console.WriteLine("Starting Sync " + DateTime.Now);
ShowStatistics(orch.Synchronize());
sqlAzureConn.Close();
sqlServerConn.Close();
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
public static void ShowStatistics(SyncOperationStatistics syncStats)
{
string message;
message = "\tSync Start Time :" + syncStats.SyncStartTime.ToString();
Console.WriteLine(message);
message = "\tSync End Time :" + syncStats.SyncEndTime.ToString();
Console.WriteLine(message);
message = "\tUpload Changes Applied :" + syncStats.UploadChangesApplied.ToString();
Console.WriteLine(message);
message = "\tUpload Changes Failed :" + syncStats.UploadChangesFailed.ToString();
Console.WriteLine(message);
message = "\tUpload Changes Total :" + syncStats.UploadChangesTotal.ToString();
Console.WriteLine(message);
message = "\tDownload Changes Applied :" + syncStats.DownloadChangesApplied.ToString();
Console.WriteLine(message);
message = "\tDownload Changes Failed :" + syncStats.DownloadChangesFailed.ToString();
Console.WriteLine(message);
message = "\tDownload Changes Total :" + syncStats.DownloadChangesTotal.ToString();
Console.WriteLine(message);
}
}
}
关于尽管设置了频率，Azure SQL 同步仍然会消耗笔记本电脑的资源，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52519354/