这是一个很高的要求。
让我建议一个中间人的方法。
我在使用System.Guid.NewGuid（）生成随机向导时遇到问题。（我允许客户端创建自己的guid，而不是依靠数据库创建序列号）。
一旦移到客户端的UuidCreateSequential，我的性能就会好很多，尤其是在INSERT上。
这是DotNet客户端代码voodoo。我确定我是从某处典当的：
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
namespace MyCompany.MyTechnology
{
public static class Guid
{
[DllImport("rpcrt4.dll", SetLastError = true)]
static extern int UuidCreateSequential(out System.Guid guid);
public static System.Guid NewGuid()
{
return CreateSequentialUUID();
}
public static System.Guid CreateSequentialUUID()
{
const int RPC_S_OK = 0;
System.Guid g;
int hr = UuidCreateSequential(out g);
if (hr != RPC_S_OK)
throw new ApplicationException("UuidCreateSequential failed: " + hr);
return g;
}
}
}
/*
Original Reference for Code:
http://www.pinvoke.net/default.aspx/rpcrt4/UuidCreateSequential.html
*/
/*
Text From URL above:
UuidCreateSequential (rpcrt4)
Type a page name and press Enter. You'll jump to the page if it exists, or you can create it if it doesn't.
To create a page in a module other than rpcrt4, prefix the name with the module name and a period.
. Summary
Creates a new UUID
C# Signature:
[DllImport("rpcrt4.dll", SetLastError=true)]
static extern int UuidCreateSequential(out Guid guid);
VB Signature:
Declare Function UuidCreateSequential Lib "rpcrt4.dll" (ByRef id As Guid) As Integer
User-Defined Types:
None.
Notes:
Microsoft changed the UuidCreate function so it no longer uses the machine's MAC address as part of the UUID. Since CoCreateGuid calls UuidCreate to get its GUID, its output also changed. If you still like the GUIDs to be generated in sequential order (helpful for keeping a related group of GUIDs together in the system registry), you can use the UuidCreateSequential function.
CoCreateGuid generates random-looking GUIDs like these:
92E60A8A-2A99-4F53-9A71-AC69BD7E4D75
BB88FD63-DAC2-4B15-8ADF-1D502E64B92F
28F8800C-C804-4F0F-B6F1-24BFC4D4EE80
EBD133A6-6CF3-4ADA-B723-A8177B70D268
B10A35C0-F012-4EC1-9D24-3CC91D2B7122
UuidCreateSequential generates sequential GUIDs like these:
19F287B4-8830-11D9-8BFC-000CF1ADC5B7
19F287B5-8830-11D9-8BFC-000CF1ADC5B7
19F287B6-8830-11D9-8BFC-000CF1ADC5B7
19F287B7-8830-11D9-8BFC-000CF1ADC5B7
19F287B8-8830-11D9-8BFC-000CF1ADC5B7
Here is a summary of the differences in the output of UuidCreateSequential:
The last six bytes reveal your MAC address
Several GUIDs generated in a row are sequential
Tips & Tricks:
Please add some!
Sample Code in C#:
static Guid UuidCreateSequential()
{
const int RPC_S_OK = 0;
Guid g;
int hr = UuidCreateSequential(out g);
if (hr != RPC_S_OK)
throw new ApplicationException
("UuidCreateSequential failed: " + hr);
return g;
}
Sample Code in VB:
Sub Main()
Dim myId As Guid
Dim code As Integer
code = UuidCreateSequential(myId)
If code <> 0 Then
Console.WriteLine("UuidCreateSequential failed: {0}", code)
Else
Console.WriteLine(myId)
End If
End Sub
*/
替代想法：
如果您的主数据库和远程数据库是“链接的”（如sp_linkserver）……那么您可以将主数据库用作“ uuid生成器”。
您不想得到uuid的“一对一”信息，这太闲谈了。
但是您可以抓取一组uuid。
下面是一些代码：
IF EXISTS (SELECT * FROM sys.objects WHERE object_id =
OBJECT_ID(N'[dbo].[uspNewSequentialUUIDCreateRange]') AND type in (N'P',
N'PC'))
DROP PROCEDURE [dbo].[uspNewSequentialUUIDCreateRange]
GO
CREATE PROCEDURE [dbo].[uspNewSequentialUUIDCreateRange] (
@newUUIDCount int --return
)
AS
SET NOCOUNT ON
declare @t table ( dummyid int , entryid int identity(1,1) , uuid
uniqueidentifier default newsequentialid() )
insert into @t ( dummyid ) select top (@newUUIDCount) 0 from dbo.sysobjects
so with (nolock)
select entryid , uuid from @t
SET NOCOUNT OFF
GO
/ *
--START TEST
set nocount ON
Create Table #HolderTable (entryid int , uuid uniqueidentifier )
declare @NewUUIDCount int
select @NewUUIDCount = 20
INSERT INTO #HolderTable EXEC dbo.uspNewSequentialUUIDCreateRange
@NewUUIDCount
select * from #HolderTable
DROP Table #HolderTable
--END TEST CODE
* /