While installing a new Dell EMC Isilon H400 cluster, I noticed node 1 in the chassis was acting up a bit. It allowed me to go through the initial cluster creation wizard, but didn’t run through all the steps and scripts afterwards. I left the node in that state while I installed another cluster, but after two hours or so, nothing had changed. With no other options, I pressed Ctrl + C: the screen became responsive again and eventually the node rebooted. However, it would never finish that boot, instead halting at “/ifs not found”. Eventually, it would need a reformat before it would function properly again…
Excelero Storage launched their NVMesh product back in March 2017 at Storage Field Day 12. NVMesh is a software defined storage solution using commodity servers and NVMe devices. Using NVMesh and the Excelero RDDA protocol, we saw some mind blowing performance numbers, both in raw IOps and in latency, while keeping hardware and licensing costs low.
I can’t hide the fact I was looking forward to the Qumulo presentation at Storage Field Day 8: I love scale-out NAS systems, with all the advantages they bring in terms of performance, scalability, manageability and upgradeability. I quickly learned that the founders of Qumulo previously worked on Isilon and OneFS. I work with Isilons in the field, so my interest was peaked
Back to Qumulo: they build a data-aware, scale-out, primary storage system. And it’s software defined. Meaning you’ll have full flexibility in the hardware you want to use and how big/fast/expensive you want to make the system. Plus it also gives you real-time insight into the data on the Qumulo system. Interested? Read on!
Exablox presented their OneBlox scale-out NAS system for small and mid-sized organizations at Storage Field Day 7. A typical customer might start with a moderate amount of data that doesn’t have too stringent performance requirements. In the next few years the customer performance requirements might double and the capacity requirements quadruple. Instead of having to buy a traditional array that would have to be sized for that 4x end-state performance and later adding extra disks for capacity, most customers would prefer to invest in small chunks and grow their system as and when it needs to. Lets see how Exablox’ OneBlox system will do this…
Last year EMC installed two new three-node Isilon clusters for one of our customers. 13 months later the customer needs more capacity so the time for adding Isilon nodes to the existing clusters has finally come. Good news for me: since the initial install I got certified to install Isilon systems myself so these expansions are all mine! EMC marketing promises an Isilon cluster expansion in 60 seconds; let’s put it to the test!
“Check your email ;)”. That was the first Twitter DM I read one sleepy morning in June. It’ll suffice to say, a minute later I was wide awake: I was chosen to represent the EMC Elect at the EMC “Redefine Possible” MegaLaunch event in London (UK)! I knew about these launch events because my colleague Rob attended one last year in Milan. Excitement started building and a couple of hours later I figured out I wasn’t going alone…
July 8th 2014. EMC MegaLaunch 4. Theme: Redefine Possible (or #RedefinePossible on Twitter). What previously was impossible, now is possible! Catchy theme and something that we’ve seen in IT for a number of times now. For example: In the 1990’s, who would have thought it was possible to migrate a server from one datacenter to another, possibly a couple of miles away, without downtime, in a couple of seconds?! Doing things fundamentally different, better: that’s the goal we’re always trying to achieve. So how can we apply this to Isilon?
Isilon scale-out NAS clusters (or grids) are built out of nodes or servers using (relatively) cheap commodity hardware. Compared to a traditional storage system this has the advantage that with every capacity (=disks) expansion you’re adding to the cluster, the number of CPUs, amount of RAM and network ports grows accordingly. You just add another node or server and poof: more TBs, more speed. The proprietary software OneFS then glues all those nodes together to create one single immense filesystem (up to 20PB with current drive specs). But what’s one trait of commodity hardware? You occasionally need an Isilon firmware upgrade! The LSI disk controller needs a new release once in a while, as do perhaps the front panel or the Infiniband components. This howto explains what to do to make sure you’re running the latest firmwares!
Every IT system needs a software upgrade once in a while, either to enable additional functionality or to patch some security holes. Yes, even an Isilon scale-out NAS. Good news: performing an Isilon OneFS Upgrade is peanuts! Including pre-checks and the post-checks our 3-node cluster was upgraded in less than 2 hours without downtime. Curious how to do this?
Once your Isilon cluster is up and running you’ll want to keep an eye on it. A piece of software that’s extremely useful to monitor both performance and capacity usage is InsightIQ. Very easy to set-up, it’s extremely powerful both in pro-active and reactive monitoring scenarios. Either sit back and watch the scheduled reports land in your mailbox or take a more active approach and drill down to find the source of a performance problem. Let’s explore further!