複数のスレッド間でSqlBulkCopyを使用する安全な方法はありますか？

Question

複数のスレッドで実行されるバッチジョブにSqlBulkCopyを導入しましたが、現在は断続的なデッドロックが発生しています。テーブルロックオプションは使用していません。挿入される表には、クラスタード・インデックスがあります。

各スレッドは、（AssetIdsのバッチで）ユニークなPortfolioSnapshotIdため

を挿入している私たちが安全にこのシナリオでSqlBulkCopyを使用することができる方法はありますか？以下

XML：

<event name="xml_deadlock_report" package="sqlserver" timestamp="2017-12-06T02:38:31.382Z"> 
    <data name="xml_report"> 
    <type name="xml" package="package0" /> 
    <value> 
     <deadlock> 
     <victim-list> 
      <victimProcess id="process248e1c96108" /> 
     </victim-list> 
     <process-list> 
      <process id="process248e1c96108" taskpriority="0" logused="63904" waitresource="PAGE: 14:1:289932632 " waittime="4523" ownerId="2409980792" transactionname="user_transaction" lasttranstarted="2017-12-06T02:38:26.657" XDES="0x2453d39ce58" lockMode="IX" schedulerid="14" kpid="24604" status="suspended" spid="151" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2017-12-06T02:38:26.657" lastbatchcompleted="2017-12-06T02:38:26.657" lastattention="2017-12-06T02:38:23.760" clientapp="XXXX" hostname="XXXX" hostpid="137000" loginname="XXXX" isolationlevel="read committed (2)" xactid="2409980792" currentdb="14" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056"> 
      <executionStack> 
       <frame procname="adhoc" line="1" stmtend="1206" sqlhandle="0x020000000f2bea1e535f1cbf04ef8318984df8965399be020000000000000000000000000000000000000000"> 
unknown </frame> 
      </executionStack> 
      <inputbuf> 
insert bulk TableName ([AssetId] NVarChar(255) COLLATE Latin1_General_CI_AS, [ParentAssetId] NVarChar(255) COLLATE Latin1_General_CI_AS, [PortfolioSnapshotId] UniqueIdentifier, [Quantity] Decimal(28,8), [CompressedProperties] VarBinary(max)) with (CHECK_CONSTRAINTS) </inputbuf> 
      </process> 
      <process id="process248e1c8cca8" taskpriority="0" logused="67244" waitresource="PAGE: 14:1:289933280 " waittime="4523" ownerId="2409980337" transactionname="user_transaction" lasttranstarted="2017-12-06T02:38:26.220" XDES="0x25e82396e58" lockMode="IX" schedulerid="2" kpid="33292" status="suspended" spid="158" sbid="0" ecid="0" priority="0" trancount="2" lastbatchstarted="2017-12-06T02:38:26.220" lastbatchcompleted="2017-12-06T02:38:26.220" lastattention="2017-12-06T02:38:24.507" clientapp="XXXX" hostname="XXXX" hostpid="137000" loginname="XXXX" isolationlevel="read committed (2)" xactid="2409980337" currentdb="14" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056"> 
      <executionStack> 
       <frame procname="adhoc" line="1" stmtend="1206" sqlhandle="0x020000000f2bea1e535f1cbf04ef8318984df8965399be020000000000000000000000000000000000000000"> 
unknown </frame> 
      </executionStack> 
      <inputbuf> 
insert bulk TableName ([AssetId] NVarChar(255) COLLATE Latin1_General_CI_AS, [ParentAssetId] NVarChar(255) COLLATE Latin1_General_CI_AS, [PortfolioSnapshotId] UniqueIdentifier, [Quantity] Decimal(28,8), [CompressedProperties] VarBinary(max)) with (CHECK_CONSTRAINTS) </inputbuf> 
      </process> 
     </process-list> 
     <resource-list> 
      <pagelock fileid="1" pageid="289932632" dbid="14" subresource="FULL" objectname="XXXX.dbo.TableName" id="lock247f3004d00" mode="X" associatedObjectId="72057594048872448"> 
      <owner-list> 
       <owner id="process248e1c8cca8" mode="X" /> 
      </owner-list> 
      <waiter-list> 
       <waiter id="process248e1c96108" mode="IX" requestType="wait" /> 
      </waiter-list> 
      </pagelock> 
      <pagelock fileid="1" pageid="289933280" dbid="14" subresource="FULL" objectname="XXXX.dbo.TableName" id="lock247f4f97c80" mode="X" associatedObjectId="72057594045661184"> 
      <owner-list> 
       <owner id="process248e1c96108" mode="X" /> 
      </owner-list> 
      <waiter-list> 
       <waiter id="process248e1c8cca8" mode="IX" requestType="wait" /> 
      </waiter-list> 
      </pagelock> 
     </resource-list> 
     </deadlock> 
    </value> 
    </data> 
</event> 

表：

CREATE TABLE [dbo].[TableName](
    [AssetId] [nvarchar](255) NOT NULL, 
    [ParentAssetId] [nvarchar](255) NULL, 
    [PortfolioSnapshotId] [uniqueidentifier] NOT NULL, 
    [Quantity] [decimal](28, 8) NULL, 
    [CompressedProperties] [varbinary](max) NULL 
CONSTRAINT [PK_TableName] PRIMARY KEY CLUSTERED 
(
    [PortfolioSnapshotId] ASC, 
    [AssetId] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY] 
GO 

ALTER TABLE [dbo].[TableName] WITH CHECK ADD CONSTRAINT [FK_TableName_PortfolioSnapshot] FOREIGN KEY([PortfolioSnapshotId]) 
REFERENCES [dbo].[PortfolioStore_PortfolioSnapshot] ([Id]) 

CREATE NONCLUSTERED INDEX [IX_TableName_PortfolioSnapshotId] ON [dbo].[TableName] 
(
    [PortfolioSnapshotId] ASC 
) 
INCLUDE ( [AssetId], 
    [ParentAssetId], 
    [Quantity], 
    [Price]) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
GO 

Answer 1

デッドロックが原因NCインデックスの存在のために発生し（ページロックIX-> Xつの異なるオブジェクトIDに同じオブジェクトから名）。クラスタードインデックスが同じキーにあり、より選択的であることを考慮して、NCインデックスの理由はわかりません。そのNCインデックスを削除します。