AMIS, Data Driven Blog – Oracle & Microsoft Azure
Getting value from IoT, Integration and Data Analytics
Oracle database
Prometheus is a very popular framework for gathering metrics from a plethora of runtime components, recording, analyzing, visualizing them and making them available for companion technologies such as Grafana. Prometheus harvests information from ‘exporters’ – processes that expose an HTTP endpoint where Prometheus can scrape metrics in a format that […]
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0 Sometimes you have an Oracle database which contains a lot of logic and you want to expose specific logic as REST services. There are a variety of ways to do this. The most obvious one to consider might be Oracle REST Data Services. ORDS is quite powerful and for example supports […]
0 0 or The Findings of an Failed Enterprise Manager Upgrade to OEM13.3 When Oracle Enterprise Manager Cloud Control 13.3 (here just called EM 13.3) came available I read the upgrade documentation and decided that the most cost-effective option for us was to stay with EM 13.2. Later, a rumor about a […]
0 0 A while ago I was reviewing the metric extensions of our Enterprise Manager Cloud Control 13.2.0.0, we use to administer a couple of hundred databases. All acceptance and production databases are installed on Linux RAC-clusters with underlying ASM storage. One of the custom reports summarized the size and number of […]
0 0 Oracle Database 18c XE (eXpress Edition) is the free community edition of the enterprise edition of Oracle Database. Oracle Database XE has almost all features of Oracle Database; however, it is limited in non-functional terms (2 CPUs, 2 GB memory, 12 GB data volume). Oracle is generous in the terms […]
0 0 When you want to upgrade a 11.2 database to 12.1 on a (linux) server with 12.2 databases, you get a INS-08106 error when using the 12.1 dbua when loading the select database Page: Reason: The 12.1 dbua does not know version 12.2 Solution: Use DBUA in silent mode Comment out […]
0 0 Apache Drill is a schema-free SQL query engine. Drill supports a variety of NoSQL databases and file systems, including HBase, MongoDB, MapR-DB, HDFS, MapR-FS, Amazon S3, Azure Blob Storage, Google Cloud Storage, Swift, NAS and local files. A single query can join data from multiple datastores. For example, you can […]
0 0 This blogpost will give you detailed instructions and information regarding the InfluxDB stack. Since February 2019 InfluxDB now consists not only the database itself, but also Telegraf, Chronograf and Kapacitor. Later you’ll read about what every part of the stack does. 18-2-2019: Living on the bloody edge, do not run […]
0 0 Oracle Enterprise Manager Cloud Control 13c provides a wizard to convert a single-instance database to an Oracle RAC database. This requires the Oracle Database Lifecycle Management Pack for Enterprise Manager Cloud Control. When converting the database to a cluster database, after proving all the required details in the wizard, a […]
0 0 Oracle Enterprise Manager Cloud Control 13c provides the Add Standby Database wizard to create a broker configuration that includes a primary database and one or more standby database. This requires the Oracle Database Lifecycle Management Pack for Enterprise Manager Cloud Control. When adding a Standby Database, after proving all the […]
0 0 In the last nine month we were busy migrating our 11g databases to 12c rel. 2. Due to time constrictions we decided early in the project to migrate 1:1. This meant that we did not make use of the CDB/PDB-feature. During the course of the upgrades my colleagues encountered a […]
0 0 In this small blog post I will talk about when to use a time series database and why to use InfluxDB for this. But first of all I need to explain what time series data is. Time series data is data where the time aspect is the most important characteristic. […]
0 0 Graph Databases are good at recording nodes and edges – and even more at performing queries that traverse the edges. Some challenges can be dealt with in Graph Databases far more elegantly and efficiently than for example in relational databases using traditional SQL. As simple example, this article will create […]
0 0 This article describes a use case for which a traditional SQL-powered relational database approach can provide a solution – but for which that traditional approach is not the optimal solution. SQL is jack of all trades – you can make it do almost anything you need. And therefore it is […]
0 0 As part of my 50 Shades of Data presentation, I talk about CQRS – Command Query Responsibility Segregation. The idea that you can have one or more read only data stores with data replicated from the master store where all data manipulation (commands) take place. In a different presentation, I […]
0 0 TL;DR; · Graph databases are ideal for query use cases with data with complex relationships and layers of connections · Its query language is fast, efficient and allows for retrieval of information at deeper levels of abstraction in the data · Neo4j is currently the most popular Graph database, and […]
0 0 One of the session at CodeOne 2018 discussed an upcoming feature for Oracle Database – supported in Release 12.2 and up – that would allow developers to consume Kafka events directly from SQL and PL/SQL and – at a late stage – also publish events from within the database straight […]
0 0 Yesterday, at the Oracle ACE Directors Product Briefing, I received a gift. It is called QuickSQL. And it is a free online service that generates SQL DDL and DML scripts. The gift in this case was the knowledge about this service – I was not aware of it. Go to […]
0 0 InfluxDB isn’t natively supported on Azure. This blog post will teach you how to deploy InfluxDB (or any other database) in a VM with a managed disk on the Azure platform. This will enable you to use this fast time-series database for your project. If the standard range of […]
0 0 A short post about the ORA-31626 error. Found out a scheduled export- and import- job was broken in an Oracle Database. Error: ORA-31626: job does not exist. After checking the scheduled jobs I realized that it’s not the scheduled job, but the datapump-job (should have read the error more carefully – […]
0 0 The what? I read about the SCN bug a few years ago (a wildly increasing value of the SCN till a certain limit has been reached ) , and took this for granted – most of it. Until recently a customer asked for help with a 9.2 database which had to […]
0 0 A couple of moths ago, Enterprise Modules announced the easy to start way of making use their Oracle modules, ora_profile. Recently their modules have been updated to support the on-premise release of Oracle 18c (18.3). In this post I’ll explain how to get started using Vagrant, VirtualBox and a little […]
0 0 Some time ago I published an article about creating a RMAN backup using Commvault. See: https://technology.amis.nl/2018/03/01/creating-rman-backups-using-commvault/ . In this article I describe how to execute a crash recovery using Commvault. You need to do a crash recovery when you lost all your datafiles, redolog files, control files and spfile. For example […]
0 0 It’s such a simple, basic and old question I got from a colleague: “Do you have to pay for extended support?”. And if so, how much I have to pay for it. So basic and yet… always have to check again the waived support, what prices and where to find […]
0 0 After having recently picked up the React framework, I figured I’d share how I quickly setup my projects to implement persistence. This way you spend minimal time setting up the skeleton of your application, letting you focus on adding functionality. This is done by combining a few tools. Let’s take […]
0 0 Here is a procedure for running an Oracle Database, preparing a baseline in objects (tables, stored procedures) and data, creating an image of that baseline and subsequently running containers based on that baseline image. Each container starts with a fresh setup. For running automated tests that require test data to […]
0 0 My Customer wanted an automated way to refresh an application database to a known state, to be done by non-technical personnel. As a DBA I know a lot of scripting, can build some small web interfaces, but why bother when there are ready available tools, like Jenkins. Jenkins is mostly […]
0 0 In my job as system administrator/DBA/integrator I was challenged to implement smoketesting using REST calls. Implementing REST in combination with WebLogic is pretty easy. But then we wanted to extend smoketesting to the database. For example we wanted to know if the database version and patch level were at the […]
0 0 We are in the process of upgrading our Oracle Clusters and SIHA/Restart systems to Oracle 12.2.0.1 The upgrade of the Grid-Infra home on a Oracle SIHA/Restart system from 11.2.0.4 to 12.2.0.1 fails when running rootupgrade.sh with error message: CRS-2415: Resource ‘ora.asm’ cannot be registered because its owner ‘root’ is not […]
0 0 Upgrading to Dbvisit Standby 8.0.x Dbvisit provides upgrade documentation which is detailed and in principle correct but only describes the upgrade process from the viewpoint of an installation on a single host. I upgraded Dbvisit Standby at a customer’s site with Dbvisit Standby in a running configuration with several hosts […]
0 0 One of my clients had an issue with their Dataguard setup, after having to move tables and rebuild indexes the transport to their standby databases failed. The standby databases complained about not being able to fetch archivelogs from the primary database. In this short blog I will explain what happened […]
0 0 Even for organizations with strong roots in relational databases such as Oracle RDBMS, there may be valuable opportunities for leveraging additional data sources, for example to support special (search) use cases. Elastic Search (Index) is one of those data stores that can add value – for example to provide powerfur […]
0 0 or If you want to get rid of stuff, you can always do a good spring-cleaning. Or you can do what I do. Move. – Ellen DeGeneres In order to prepare for a network reorganization we needed to move our current Oracle Enterprise Manager machine into another network segment. So […]
0 0 Situation at customer’s site: OMS 13.2 on Oracle Linux, targets are Windows machines, and a bit ancient: Windows 2008 R2. How to deploy agents on those targets? Several methods are possible in theory. In this blog I’ll describe my efforts to determine what is really possible and what is efficient.
0 0 Despite the potential of Oracle Management Cloud, I’m a fan of Oracle Enterprise Manager, with its small imperfections. So when noticing a 12c Oracle Enterprise Manager on Linux, and targets on Windows, I took the challenge of modernizing the customer’s environment a bit. And the starting point , 12.1.0.5 for […]
0 0 While preparing for writing an article about “Oracle API Platform Cloud Service” I wanted to quickly be able to generate example JSON payload’s based on some tables in the “HR’ schema. To achieve this, I came across “Oracle REST Data Services (ORDS)” and wanted to know more about it. In […]
0 0 One of the benefits of using Docker is quick and easy provisioning. I wanted to find out first-hand if this could help me get an Oracle Enterprise Edition database quickly up and running for use in a development environment. Oracle provides Docker images for its Standard and Enterprise Edition database […]
0 0 A secure distributed ledger with smart contract capabilities not requiring a bank as an intermediary! Also a single source of truth with complete traceability. Definitely something we want! Blockchain technology promises to make this possible. Blockchain became famous through cryptocurrency like Bitcoin and Ethereum. The technology could also be considered […]
0 0 At Monday Oracle Open World really starts. A whole lot of general sessions with announcements and strategic directions on product / service level. In this post I’ll try to summarize the highlights of this day. Quite hard, there are a whole lot of interesting sessions which overlap. Always the […]
0 0 Just a quick note about day 1 at Oracle Open World. This Sunday traditionally is filled with presentations of usergroups, customers and product management, and at the end of the day the welcome-keynote. In the presentations there’s not really exciting news, they will have to wait until the keynotes. But […]
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