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David Barbarin

Windows Server 2016: Introducing Storage Spaces Direct

By | Hardware & Storage, Operation systems | 5 Comments

Have you heard about Storage Spaces introduced by Windows Server 2012? Well, this is a very interesting storage feature that allows us to deal with functionalities like storage virtualization, RAID capabilities, thin or thick provisioning, cluster shared volume (CSV), efficiently file repair and so on. In addition, the Windows 2012 R2 version has also introduced some enhancements like storage tiering, write-back caching, datadeduplication, parity space support for failover clusters, JBOD enclosure awareness… A bunch of…

 
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David Barbarin

Want to benchmark your storage? It’s time to switch to DiskSpd tool!

By | Development & Performance | No Comments

As you certainly know, the well-known tool SQLIO is officially deprecated since few months. From my part, I had the opportunity (maybe the last) to use SQLIO for a customer project in order to benchmark the storage for SQL Server AlwaysOn and availability groups. Now it’s time to change for a new benchmark tool : DiskSpd. First of all, DiskSpd is an open source and free based utility, provided by the Windows development team, it…

 
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Nathan Courtine

SQL Server 2016 CTP2: Stretch database feature – Part 2

By | Database management | No Comments

In my previous blog SQL Server 2016 CTP2: Stretch database feature – Part 1, I explained how to prepare your instance and your database to enable the Stretch feature for your table. Now I present you how to enable the feature for your tables! Prerequisites Enabling Stretch Database at the table level requires ALTER permissions on this table.   Limitations For the moment in the SQL Server 2016 CTP2, there are several and important limitations,…

 
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Nathan Courtine

SQL Server 2016 CTP2: Stretch database feature – Part 1

By | Database management | No Comments

SQL Server 2016 CTP 2 has introduced some interesting new features such as Always Encrypted, Stretch database, the configuration of the tempdb in the SQL Server installation, aso… Regarding the configuration of the tempdb in SQL Server 2016 CTP 2, I recommend you a good article called SQL Server 2016 CTP2 : first thoughts about tempdb database from David Barbarin. In this article, I will focus on the Stretch database feature! What is the Stretch…

 
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David Barbarin

Considerations about SQL Server database files placement, Netapp storage and SnapManager

By | Database management | No Comments

When you install SQL Server, you have to consider how to place the database files. At this point you will probably meet the well-known best practices and guidelines provided by Microsoft but are you really aware of the storage vendor guidelines? Let’s talk about it in this blog post. A couple of weeks ago, I had the opportunity to implement a new SQL Server architecture over on a Netapp storage model FAS 3140. The particularity…

 
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Pierre Sicot

Oracle Database 12c: Information Lifecycle Management

By | Technology Survey | 7 Comments

More and more resources are used in companies to manage data. Most companies buy more and more storage systems because of poor resource utilization. Starting with Oracle 11g, Oracle has introduced Information Lifecycle Management (ILM) which can use different kinds of storage with varying performances in order to increase cost savings. In Oracle 12c, ILM now allows the automation of the data movement to different storage tiers and the compression at segment level. The idea behind…

 
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Oracle Team

Oracle Database Appliance: new ODA X3-2 architecture

By | Operation systems | No Comments

A few weeks ago, I posted an article about Oracle Database Appliance, focusing on ODA version 2.5.0.0.0. However, a new update of ODA, version 2.5.5.0.0, was released by Oracle on 5 March. This posting will focus on the new ODA release, which leads to a new hardware architecture. So, what’s new with this new ODA version? According to the Release Notes, ODA now supports the new X3-2 architecture which allows additional hardware and storage capabilities. Physical…

 
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Oracle Team

Bug on Oracle 11.2 “ORION FAILS WITH ORA-27061″: Patch available!

By | Application integration & Middleware | No Comments

In march 2011, my colleague Gregory Steulet published an article about Simulating and testing I/O performances with Orion. In this article, he wrote about a bug concerning Orion on Oracle 11.2, reported in Oracle bug number 9104898: “ORION FAILS WITH ORA-27061: WAITING FOR ASYNC I/OS FAILED”. Trying to compare performances of storage devices on a virtual machine between a classical and a paravirtual storage adapter, I experienced the same error when using large IOs. I…

 
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Stéphane Haby

SnapManager for SQL Server: databases limitation policy

By | Database management | No Comments

I recently talked to a customer about SnapManager, its recommendation on the number of databases and about a way to prevent the creation of more than 35 databases. The NetApp recommendation is no more than 35 databases on a single volume. The reason is that SQL Server has to use 4-5 worker threads per database in order to manage the freezing and un-freezing I/O for each database. Look at this note: More information on this…

 
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Open source Team

PostgreSQL : Qu’ai-je installé, Où sont mes données ?

By | Technology Survey | One Comment

Dans mon dernier article sur PostgreSQL, j’ai présenté l’installation du logiciel en explorant les 2 solutions suivantes, l’installation Debian et l’installation EntrepriseDB. Ces deux installations créent immédiatement un cluster de base de données, Debian nous imposant le point de stockage et EntrepriseDB nous proposant de saisir une destination. Je vous propose maintenant d’explorer ce qui a été installé sur votre disque à la mise en route de ce cluster de base et d’analyser les différences entre les deux installations.

 
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