By Daniel Pehush and Gunter Zink The Mission - Caution, bumps ahead Picking up from our previous blog post, with the performance squared away, the next important piece was selecting the vendor(s) for our storage devices. With most of the vendors we spoke with Qumulo...
Today I’m going to talk about blinking red and green lights and how they led us on a lengthy performance investigation that ended deep inside the PCI Express drivers in the Linux kernel. (Also, if you haven’t already seen it, check out the second part of the Road to...
Qumulo’s API opens up possibilities for making your file system work for you. In the public cloud, microservices make it easy to take advantage of the Qumulo API to integrate with other tools. These services are quick to deploy and easy to manage. This is the first...
We recently kicked off the new fiscal year here at Qumulo. During the company kickoff, this chart was presented, showing the average read latency for Qumulo customers around the world for the last year. As you can see, NFS and SMB protocol read latencies are down...
By Daniel Pehush and Gunter Zink The mission: The engine we chose In our last post in this series, we talked about how our team set out to build the highest bandwidth, all-flash node possible using off-the-shelf components. There were several things to consider once...
The mission : Early beginnings A long, long time ago, on a chilly, dreary, afternoon in late fall of 2016, Jason Sturgeon, our hardware product owner here at Qumulo, conveyed to the hardware engineering team that our current and potential customers wanted an all-flash...
When analyzing the performance of a distributed storage system, there are many things to consider. The characteristics of your algorithms (both local and distributed), network topology, the throughput and latency capabilities of your underlying storage media, and many...
This post is not about what types of performance issues a clustered file storage system runs into; rather it will delve into the process of quickly finding those issues and removing them. That being said, many of the anecdotes and procedures are based in the field of...
I recently spoke with a software tester and couldn’t help but ask for his opinion of test-driven development (TDD) since it’s a mandated practice here at Qumulo for our engineering teams. To paraphrase his sentiments, he said: I think unit testing is important, but...
Today I’d like to talk about one particular day’s work that I found interesting. Our team was recently in the middle of investigating read performance for small but numerous requests, which had shown to be CPU-bound. About half of our CPU time was spent contending on...
It’s 4 p.m. in Seattle on a Friday during a release week. The new release branch has been cut and handed off to the certification team. It’s time to take a look at what new goodness made it in! Engineers and curious team members gather in the cafe, with snacks and...
[Author's note: This blog post accompanies the Seattle React.js Meetup we hosted on September 19, 2018, watch the recording] At Qumulo, we build a scale-out distributed file system, and building such a system, as it turns out, is hard. We have layers upon...
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