Keeping the Uber platform reliable and real-time across our global markets is a 24/7 business. People may be going to sleep in San Francisco, but in Paris they’re getting ready for work, requesting rides from Uber driver-partners. At that same …
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Wondering which databases are trending in 2019? We asked hundreds of developers, engineers, software architects, dev teams, and IT leaders at DeveloperWeek to discover the current NoSQL vs. SQL usage, most popular databases, important metrics to track, and their most time-consuming database management tasks. Get the latest insights on MySQL, MongoDB, PostgreSQL, Redis, and many others to see which database management systems are most favored this year.
SQL vs. NoSQL
As any database administrator knows, the first question you have to ask yourself is whether to use a SQL or NoSQL database for your application. …[Read more]
Cluster management, a common software infrastructure among technology companies, aggregates compute resources from a collection of physical hosts into a shared resource pool, amplifying compute power and allowing for the flexible use of data center hardware. At Uber, cluster management …
The post Peloton: Uber’s Unified Resource Scheduler for Diverse Cluster Workloads appeared first on Uber Engineering Blog.
From driver and rider locations and destinations, to restaurant orders and payment transactions, every interaction on Uber’s transportation platform is driven by data. Data powers Uber’s global marketplace, enabling more reliable and seamless user experiences across our products for riders, …
The post Databook: Turning Big Data into Knowledge with Metadata at Uber appeared first on Uber Engineering Blog.
DataOps Barcelona is an event organized by Binlogic and will be taking place June 21-22, 2018 in Barcelona, Spain. Pythian is proud to be supporting this inaugural open source-focused conference in Europe!
DataOps is of course short for “Database + Operations” and contains talks about the various open-source database ecosystems and how they are operationalized with regards to cloud solutions, security, automation, high availability and scaling.
Pythian has a long history of helping companies leverage open source technologies and cloud infrastructure to meet their business requirements. We excel at managing traditional open source relational database (MySQL) and relatively new NoSQL technologies (MongoDB, Cassandra).
Our …[Read more]
The last time that I installed Cassandra was on a version of Fedora 20. So, I new the first thing to check was the installation of Java. You can check the Java installation with two statements on a fresh installation of Fedora 27. You need to check the Java runtime and then the Java Software Development Kit before installing, starting, and using Cassandra.
You check the Java runtime with this command:
It should return:
openjdk version "1.8.0_171" OpenJDK Runtime Environment (build 1.8.0_171-b10) OpenJDK 64-Bit Server VM (build 25.171-b10, mixed mode)
You check the Java Software Development Kit (JSDK) with this command:
It should return:
After verifying the Java and JSDK installation, you can install
the Cassandra packages with the following
command as the …
“The single most important lesson I’ve learned is to keep it simple. I find designers sometimes deliver over-complex, generic solutions that could (in theory) do anything, but in reality are remarkably difficult to operate, and often misunderstood.”–John Ryan
I have interviewed John Ryan, Data Warehouse Solution Architect (Director) at UBS.
Q1. You are an experienced Data Warehouse architect, designer and developer. What are the main lessons you have learned in your career?
John Ryan: The single most important lesson I’ve learned is to keep it simple. I find designers sometimes deliver over-complex, generic solutions that could (in theory) do anything, but in reality are remarkably difficult to operate, and often misunderstood. I believe this stems from a lack of understanding of the …[Read more]
You may know Continuent Tungsten for our highly advanced MySQL replication tool, Tungsten Replicator, and for our state-of-the-art MySQL clustering solution, Tungsten Clustering. Our solutions are used by leading SaaS vendors, e-commerce, financial services and telco customers.
But there are more, many more, Tungsten deployments out there. Tungsten Replicator can be used for real-time data
After installing Cassandra and reading Cassandra The Definitive
Guide, it struck me that I should learn a bit more about the
Cassandra Query Language (CQL). So, after I setup a single-node environment and created a
.bashcassandra environment file to connect as a
student user to the Cassandra instance:
# Add the Java and JRE paths to the $PATH environments. export set PATH=$PATH:/usr/lib/jvm/java-1.8.0-openjdk-22.214.171.124.x86_64:/usr/lib/jvm/java-1.8.0-openjdk-126.96.36.199.x86_64/jre # Add the $JAVA_HOME and $JRE_HOME environment variables. export set JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-188.8.131.52.x86_64/ export set JRE_HOME=/usr
Having started Cassandra as the
cassandra user, I
connected to the Cassandra Query Language Shell
Continuent are pleased to announce the release of Tungsten Replicator and Tungsten Clustering 5.2.0
This release is one of our most exciting new releases for a while, as it contains some significant new features and lays the groundwork for some additional new functionality in the upcoming 5.3.0 and 6.0 releases due later this year.
In particular, this release includes the following new features:
- New replicator filtering environment to make filtering
quicker and easier to use, and more flexible
- New filter configuration standard for new filters
- New filter to make replication out of a cluster easier
- New filters for filtering events and data
- New applier for sending Apache Kafka messages directly from an incoming data stream
- New applier for adding incoming records directly to Elasticsearch for indexing
- New …
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