The new estimator has incorporated algorithms and assumptions which work with modern OLTP and data warehouse workloads. In terms of OS’s which support this feature, you can use either Windows Server 2012 or Windows Server 2012 R2 and also Windows Server 2008 R2 SP2. Also, you will have to use either one of the Enterprise, Developer, or Evaluation editions of SQL Server 2014 in order to have access to In-Memory OLTP. COURSE DESCRIPTION SQL Server 2016 introduces many new T-SQL features for Developers and Database Administrators. The best approach for recovery is to utilize or at least explore all options
so make sure you take the time to work together and implement the best strategy
for your environment.
- If your most recent partitions become fragmented due to activity it’s no longer necessary to rebuild indexes on the entire table.
- Additional compression of Columnstore indexes is now available by using Alter Index Rebuild with the COLUMNSTORE_ARCHIVE option.
- The new SQL Server Data Tools for BI (SSDT-BI) is used to create SQL Server Analysis Services (SSAS) models, SSRS reports, and SSIS packages.
- By moving select tables and stored procedures into memory, you can drastically reduce I/O and improve performance of your OLTP applications.
- Do you know of any links to any T-SQL improvements or new features in SQL Server 2014.
However, one thing stands out, and it is even in the standard edition of SQL Server 2014—Backup Encryption. Allows logins to perform SELECT Statements in all databases that the login has CONNECT permission. This can be defined at the database level, COMMIT level, or ATOMIC block level in
Natively Compiled Stored Procedures. Also the following Stored Procedure sys.sp_flush_log is included to flush
the Transaction Log to disk in order to make previously committed transactions
durable with delayed durability. One welcome addition to SQL Server 2014 is the ability to encrypt database backups for at-rest data protection.
Performance Enhancements
With the introduction of SQL Server 2014 Microsoft has made enhancements to the algorithm that determines when statistics are out of date. This means that statistics will be invalidated sooner, which will lead to the triggering of the update statistics process. By updating statistics more often SQL Server will be able to create better optimized query plans. The Resource Governor lets you limit the amount of CPU and memory that a given workload can consume. SQL Server 2014 extends the reach of the Resource Governor to manage storage I/O usage as well. The SQL Server 2014 Resource Governor can limit the physical I/Os issued for user threads in a given resource pool.
- So the more changes that occur in the source the greater storage
need there is to track these changes. - This feature is designed to help offload the small random I/Os that SQL Server has traditionally done to mechanical disks, to Solid State Drives.
- It is relatively easy to create table and/or stored procedures to take advantage of the In Memory Built-in feature.
Readable secondary replicas are now available for read-only workloads, even when the primary replica is unavailable. This new integration feature enables you to create asynchronous availability group replicas in Windows Azure for disaster recovery. In the event of a local database outage, you can run your SQL Server sql server 2014 new features for dba databases from Windows Azure VMs. The new Windows Azure AlwaysOn availability options are fully integrated into SQL Server Management Studio (SSMS). SQL Server 2012 CU2 already lets you back up databases to Azure storage. I hear a lot of people ask me, “Brent, how can I make my backups slower and less predictable?
SQL Server In-Memory OLTP Overview
The most talked about and most awaited feature of SQL Server 2014 is most undoubtedly the new In-Memory OLTP engine, internally called Hekaton. It was announced at PASS 2012 and was warmly welcomed by the industry.
But just to name a few of the improvements, the new SQL Server 2014 edition brings to the table new encryption mechanisms for your backups, managed backups to Azure, and the ability to backup to URL straight from SSMS. If you want to evaluate how the new In-Memory OLTP engine improves your database’s performance, then Microsoft has a new Analysis, Migrate, and Report tool (AMR). There is always resistance to anything new or different, especially in the world
of technology.
SQL Server 2014 Cloud Computing Enhancements
In this article, we are going to look at the benefits and types of snapshots
that can benefit SQL Server and why every DBA should be using snapshots in their
environment in addition to database backups. SQL Server backups have always been the Go-To Approach for DBAs to recover databases
and to refresh lower-level environments like development or test servers. One area that most DBAs overlook are the benefits of snapshots for recovery, quickly
refreshing an environment, auditing, reporting, and even ransomware protection.
The In-Memory OLTP engine is supported on Windows Server 2012 R2, Windows Server 2012, and Windows Server 2008 R2 SP2. In addition, you need to be using the SQL Server 2014 Enterprise, Developer, or Evaluation edition. Notably, In-Memory OLTP won’t be supported on the SQL Server 2014 Standard edition. For more information, check out “Rev Up Application Performance with the In-Memory OLTP Engine.”
Power BI for Office 365 includes Power Query (formerly code-named Data Explorer), Power Map (formerly code-named GeoFlow), Power Pivot, and Power View. You can learn more about Power BI at Microsoft’s Power BI for Office 365 site. If this permission is denied, a high privileged login can be stopped from impersonating any other logins. The new columnstore index gives you the possibility to update the underlying table without dropping the columnstore index like you were forced to do in previous versions. Also, the columnstore index in SQL Server 2014 has to use all columns from the table and cannot be combined with another index.
Therefore if you keep snapshots for a long
time there could be a significant need for storage because of all of the possible
source changes that occur over time that need to be tracked. It is possible that
some point the snapshot could take up as much space as the source. Snapshots in the storage array are done by updating the metadata that keeps track
of the logical / physical relationship of Logical Unit Number (LUNs) / disk volumes. As data changes in the source, the
size of the snapshot will grow and at some point the snapshot could be as large
as the database therefore requiring increased storage.
Important New Features in SQL Server 2014
The In-Memory OLTP engine is designed for high concurrency and uses a new optimistic concurrency control mechanism to eliminate locking delays. The In-Memory OLTP tables are copied into memory and made durable by transaction log writes to disk. An all-new lock-free engine processes the transactions for memory-resident tables.
- In addition, SQL Server 2014 can take advantage of the OSs’ Server Message Block (SMB) 3.0 enhancements to achieve high-performance database storage on Windows Server 2012 R2 and Windows Server 2012 file shares.
- SELECT … INTO
The SELECT … INTO statement is improved and can now operate in parallel. - ” Those folks loved backing up from on-premise databases over their Internet connections, but that wasn’t enough.
- Taking a crash-consistent snapshot is less of a drain on resources, but is not
a perfect recovery as you may lose unwritten data. - Columnstore indexes is another card in the suite of high-performance technologies that use in-memory processing.
