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David Barbarin

SQL Server availability groups, SQL Browser and Shared Memory considerations

By | Database Administration & Monitoring, SQL Server | No Comments

Few weeks ago, my colleagues and me discussed availability groups and network considerations for one of our customers including disabling SQL Browser service and shared memory protocol. The point was disabling both features may lead to unexpected behaviors when creating availability groups. Let’s start with the SQL Browser service. It is not uncommon to disable this service at customer shops and to use directly SQL Server listen ports instead. But if you go trough the…

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Petre Radut

How to migrate Grid Infrastructure from release 12c to release 18c

By | Application integration & Middleware, Database Administration & Monitoring, Database management, Oracle | No Comments

Oracle Clusterware 18c builds on this innovative technology by further enhancing support for larger multi-cluster environments and improving the overall ease of use. Oracle Clusterware is leveraged in the cloud in order to provide enterprise-class resiliency where required and dynamic as well as online allocation of compute resources where needed, when needed. Oracle Grid Infrastructure provides the necessary components to manage high availability (HA) for any business critical application. HA in consolidated environments is no…

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Olivier Spiesser

Convert a WebLogic Cluster from configured to dynamic

By | Application integration & Middleware | No Comments

Unless the servers in cluster are not symmetric, which is not recommended anyway, dynamic cluster have many advantages against configured cluster:

Ensure Cluster Member Uniformity
Easily add new servers to manage more traffic
Automatically adapt to load to add/remove managed servers
Can still contain configured servers even if not recommended as for point 1

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Pascal Brand

New installed Fusion Middleware 12C Reports or Forms WebLogic Servers fails to start after configuring SSL

By | Application integration & Middleware | No Comments

We installed a Fusion Middleware report and Forms 12.2.1.2.0 on a Linux Server. This was a single node Reports and Forms servers. After disabling the Non SSL Listen Port, we get below error in logs while starting the Managed Server with only SSL ports enabled. ####<Oct 27, 2017, 2:38:23,265 PM CEST> <Info> <Deployer> <host01.example.com> <WLS_FORMS> <[ACTIVE] ExecuteThread: ‘1’ for queue: ‘weblogic.kernel.Default (self-tuning)’> <<WLS Kernel>> <> <728708fe-00a1-4078-bb31-f12fb2c6beae-00000030> <1509107903265> <[severity-value: 64] [rid: 0] [partition-id: 0] [partition-name: DOMAIN]…

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Morgan Patou

WebLogic – Cannot register for disconnect events on local server

By | Application integration & Middleware | No Comments

When working with WebLogic, there will probably be a moment when you will ask yourself: damn, what is wrong? Nowadays, software are so complex that it is kind of easy to introduce bugs/non-wanted behaviors in them… In this blog, I will present a small thing that just blew my mind when I faced it: I had a fully working WLS on which I executed a WLST script in order to configure the SSL Ciphers for…

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David Barbarin

Prochaine édition des 24 HOP 2017 francophone

By | Technology Survey | No Comments

La prochaine édition du 24 Hours of PASS 2017 edition francophone se déroulera les 29-30 juin prochain. Pour rappel le format est simple: 24 webinars gratuits répartis sur 2 jours de 07:00 à 18h00 GMT et en Français. La seule obligation: s’inscrire aux sessions auxquelles vous assisterez. Cela vous permettra également de récupérer l’enregistrement vidéo si vous voulez la visionner à nouveau par la suite. Cette année il y en aura encore pour tous les goûts. Du…

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David Barbarin

SQL Server Failover Cluster on Linux and synchronizing uids/gids across nodes

By | Database Administration & Monitoring | No Comments

In my previous blog post, I talked about SQL Server on Linux and high availability. During my test, I used a NFS server to share disk resources between my cluster nodes as described in the Microsoft documentation. A couple of days ago, I decided to add a fourth node (LINUX04) to my cluster infrastructure and I expected to do this work easily. But no chance, I faced a problem I never had before on this…

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David Barbarin

Introducing high-availability and multi-subnet scenarios with SQL Server on Linux

By | Database Administration & Monitoring | No Comments

On my first blog about SQL Server on Linux, I introduced the new high availability feature which concerns only SQL Server failover cluster instances so far. During this discovery time, I had the support of Mihaela Blendea (@MihaelaBlendea) at Microsoft to clarify some architecture aspects about this new kind of architecture. Firstly, I would like to thank her. It’s always a big pleasure to get the availability of the Microsoft team in this case. But after…

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David Barbarin

Introducing high-availability with SQL Server on Linux

By | Database Administration & Monitoring, Database management | One Comment

A couple of months ago, I did my first installation of SQL Server on Linux. I wrote about it in this blog post. So now it’s time to start the new year by talking about high availability on Linux with SQL Server vNext. Running standalone instances will be suitable for scenarios but I guess introducing high-availability with critical environments still remain mandatory.Currently, the CTP1 supports installing a SQL Server Failover Cluster Instance on the top…

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David Barbarin

Migrating your existing availability group infrastructure to 2016

By | Database Administration & Monitoring | One Comment

Have you already a plan to migrate your old SQL Server 2012 availability group infrastructure to windows 2016 and SQL Server 2016? In a previous post, I talked about distributed availability groups and cross-cluster migration scenarios but this time the game is not the same because we want to achieve an in-place upgrade of the existing AG infrastructure. This question will probably be a concern the next year and if we take a closer look…

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