Last week I was helping out a user who was seeing lots of error messages in their application logs when connecting to Neo4j Aura. So I did like any good developer and I asked the all knowing all powerful google how to cleanse your Aura, and guess what it told me…
Summer is over, and things are starting to get a little cloudy. At Neo4j we provide a full service cloud hosting offering to select Enterprise customers and have been publishing guides on how to run your own clusters in the Google Cloud Platform, Amazon EC2, and Microsoft Azure. Tune in to our Neo4j Online Developer Summit on Thursday, October 10, 2019 for even more cloud goodness. You don’t want to miss it.
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A few months ago, Mark Needham blogged about how to setup remote monitoring of Neo4j using YourKit. I was asked the other day about getting a few more details on how to do this on Amazon, so here is my attempt at that. The first thing we’ll do is setup Neo4j on a Virtual Private Cloud. It’s good practice to not put your databases directly on the public internet.
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I started my software development career writing applications for a Call Center at a small bank in Florida. I remember the bank had purchased whatever the “Cadillac” of Interactive Voice Response (IVR) systems was then for some crazy amount of money. Today you can build an IVR overnight using Twilio.
When you sign up with Twilio, you get to choose your phone number (more or less). For example, I picked +1 (636) 451-7411, which spells out +1 (neo) 4j1-7411. If you were to call this number right now (assuming I have not run out of Twilio credits) you’ll connect to my IVR.
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Just because you can, doesn’t mean you should. However sometimes it can be comforting to know how. I am going to show you how to run Neo4j Embedded and Neo4j Server at the same time…and an Unmanaged Extension inside that Neo4j Server. There aren’t any real good reasons why you’d want to do this, but it’s April Fools, so here we go.
In the last blog post we managed to run Neo4j at Ludicrous Speed over http using Undertow and get to about 8000 requests per second. If we needed more speed we can scale up the server or we can scale out to multiple servers by switching out the GraphDatabaseFactory and using the HighlyAvailableGraphDatabaseFactory class instead in Neo4j Enterprise Edition.
But can we go faster on a single server without new hardware? Well… yes, if we’re willing to drop http and switch to Web Sockets.
In the last blog post we saw how we could get about 1,250 requests per second (with a 10ms latency) using an Unmanaged Extension running inside the Neo4j server… but what if we wanted to go faster?
The easy answer is to Scale Up. However, trying to add more cores to my Apple laptop doesn’t sound like a good time. Another answer is running a Neo4j Cluster and (almost) linearly scaling our read requests as we add more servers. So a 3 server cluster would give us between 3,500 and 3,750 requests per second.
But can we go faster on a single server without new hardware? Well… yes.
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Rock climbing is a physically and mentally demanding sport, it test the limits of one’s strength, endurance, agility, balance and concentration. Sasha DiGiulian is one of the best rock climbers in the world. I can’t get past 15 feet without starting to panic and freak out. Maybe it’s because I’m afraid of heights…and overweight, but I’m just not right for that kind of challenge.
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I was introduced to the open-source performance testing tool Gatling a few months ago by Dustin Barnes and fell in love with it. It has an easy to use DSL, and even though I don’t know a lick of Scala, I was able to figure out how to use it. It creates pretty awesome graphics and takes care of a lot of work for you behind the scenes. They have great documentation and a pretty active google group where newbies and questions are welcomed.
It ships with Scala, so all you need to do is create your tests and use a command line to execute it. I’ll show you how to do a few basic things, like test that you have everything working, then we’ll create nodes and relationships, and then query those nodes.
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There are multiple ways to setup a Neo4j Cluster on Amazon Web Services (AWS) and I want to show you one way to do it.
Overview:
We’ll start off by logging on to Amazon Web Services and creating a Virtual Private Cloud:
Max De Marzi 