Category: NuoDB

Author: . Internally, NuoDB uses the two-phase commit protocol to manage durability of user data. NuoDB also supports the X/Open XA protocol for synchronizing global transactions across multiple data stores. XA is also sometimes referred to as two-phase commit. The fundamental principles in both protocols are similar, but serve different purposes. Let us explore the difference between these two protocols.A Single Transaction Across Two Resources Let us explore a simple use case. A simple application takes messages from one data source (outgoing_messages) and writes them to a new data source (incoming_messages). This is a fairly common use case if you ... Read More

Author: mkysel. Internally, NuoDB uses the two-phase commit protocol to manage durability of user data. NuoDB also supports the X/Open XA protocol for synchronizing global transactions across multiple data stores. XA is also sometimes referred to as two-phase commit. The fundamental principles in both protocols are similar, but serve different purposes. Let us explore the difference between these two protocols.A Single Transaction Across Two Resources Let us explore a simple use case. A simple application takes messages from one data source (outgoing_messages) and writes them to a new data source (incoming_messages). This is a fairly common use case if you ... Read More

Author: . The beauty of Kubernetes Operators and the new OpenShift OperatorHub (different from OperatorHub.io, a catalog for native K8s operators) is that OperatorHub is integrated into the OpenShift 4 experience, which is how it takes truly complicated technical solutions and makes deploying them so easy. When Operators were first made public in a 2016 CoreOS blog post, the goal of Operators was to make the software itself include operational knowledge that previously resided outside of the Kubernetes cluster. Operators simplify that process by implementing and automating the most common Day-1 and Day-2 activities in a piece of software running ... Read More

Author: . In April Murat Karslioglu and I presented a webinar on the challenges of deploying an enterprise SQL database across multiple geographical locations in OpenShift or Kubernetes clusters. We had a lot to show, and unfortunately ran out of time to answer questions. We put together answers to those questions here for you, but if you have more, please reach out — we’d be happy to discuss any other questions or ideas you have.  How easy is it to set up NuoDB to use OpenEBS? It’s very easy. Just follow the OpenEBS install instructions to start OpenEBS storage, create ... Read More

Author: . As the reality of our Sofia office moved from concept (one engineer working from home) to reality (six engineers working together in a real office), it seemed that the time was ripe to have one of our almost-quarterly Engineering Summits in Bulgaria. We still have several open positions there so I felt it was a good opportunity to meet some of our recruitment partners and personally reaffirm our commitment to investing in, and growing, our office there. We believe that the strong engineering talent we are continuing to find in Sofia will be integral to realising our vision of where ... Read More

Author: . This week we’re excited to join Temenos at the Temenos Community Forum, our first public event since partnering with them in November. Since then we’ve been working closely to deliver the cloud innovation that will help banks migrate their critical applications to the cloud. Global consumer demands are driving organizations to rethink how they architect their systems — today, customers of banks and financial service organizations expect the same experience from their bank that they get from Twitter and Netflix in terms of availability, responsiveness, and performance.The Journey to the Cloud Through Digital Transformation When banks and financial ... Read More

Author: . Interested in NuoDB's elastic SQL database and want to know how it all works? Download our white paper on NuoDB's database architecture.Looking for the next-generation database As a NuoDB solution architect, I constantly talk to people about what they’re looking for in a database. More and more often, architects and CTOs tell us that they’re building their next-generation data center – often using containers or cloud infrastructure - and they need a database that fits this model. In their ideal world, they want a familiar relational database – but they want one that can deliver elastic capacity, maintain ... Read More

Author: ariff. With NuoDB v3.4, we changed how we package and version our JDBC and Hibernate drivers.Previously, we have always versioned and packaged the JDBC and Hibernate drivers with the NuoDB database. This tight coupling with the NuoDB database version has led to a lot of confusion on which driver version to use with which release. Customers assumed that the version shipped with the NuoDB database is the only version that can be used with that database version. This is not correct. In fact, it hasn’t been correct since NuoDB v1.0. We have maintained compatibility with every release. You can ... Read More

Author: . With NuoDB v3.4, we changed how we package and version our JDBC and Hibernate drivers.Previously, we have always versioned and packaged the JDBC and Hibernate drivers with the NuoDB database. This tight coupling with the NuoDB database version has led to a lot of confusion on which driver version to use with which release. Customers assumed that the version shipped with the NuoDB database is the only version that can be used with that database version. This is not correct. In fact, it hasn’t been correct since NuoDB v1.0. We have maintained compatibility with every release. You can ... Read More

Author: mkysel. As I explained in a previous blog post, sometimes MVCC is not sufficient and an operation needs to block out all other concurrent modifications. NuoDB is able to lock three types of lockable resources: tables, schemas, and sequences. A resource can either be locked in SHARED mode (which still allows record modification, but no metadata modification) or EXCLUSIVE which prevents any concurrent modification.EXCLUSIVE access is required for DDL that visits all records (various index operations for example) and distributed concurrent access is not possible. Exclusive access can also be used by operations that need to work around MVCC ... Read More