Replication

11 posts

PSA: Unity VMware VMFS replication limit hit at 64 sessions

Our company recently replaced a lot of VNX storage by new Dell EMC Unity all-flash arrays. Since we are/were primarily a VMware hypervisor house, we decided to go ahead and create the new LUNs as VMware VMFS (Block) LUNs/datastores. This however resulted hitting us a weird and unexpected replication limit at 64 sessions.

 

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Zerto facilitates IT resiliency with a single VM replication platform

Zerto IT ResiliencyBack at Storage Field Day 16 in Boston, Zerto presented their VM replication software. It’s a block level, continuous hypervisor based replication, using a journal to log I/O in a VCR-like fashion. This enables you to rewind to any point in time that’s covered in the journal, and recover your VMs to that exact state. Zerto’s plans are a bit grander than “just VM Replication” though… they aim to cover the complete IT Resiliency market.

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RecoverPoint Connect Cluster wizard: Internal Error, contact support

RecoverPoint boxToday I visited a customer to connect two RecoverPoint clusters. One RecoverPoint cluster is connected to a Unity array, the other to a VNX. After installing both clusters, we ran the RecoverPoint Connect Cluster wizard and were greeted with an “Internal Error. Contact support” error message. Awesome! Fortunately it turned out to be a pretty basic error which was easy to fix. A short story about RecoverPoint installation types in mixed-array configurations…

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Deploying RecoverPoint – Part 3 – Deployment Manager

RecoverPoint boxConfiguration of the deployed vRPAs is performed with the RecoverPoint Deployment Manager. This is a tool on your laptop that, using a multi-step process, assigns IP addresses to the RecoverPoint appliances and their various networks and connects these appliances to the VNX array. The previous part of this series discussed the first steps to get into the tool: now it’s time to start entering some configuration data.

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Deploying RecoverPoint – Part 1 – Intro & Gotcha’s

RecoverPoint boxIt has been a while since I’ve written anything about RecoverPoint since my original post on RecoverPoint 4.0 several years ago. To my delight I was recently put on a couple of projects to deploy new virtual RecoverPoint clusters for two customers. Several things had changed since the first appearance of the virtual RecoverPoint Aplliance (RPA), so why not write a small series on the deployment of these appliances? Gotcha’s included!

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vSphere Replication – Pros and Cons

vSphere Replication ArchitectureThe last couple of months I’ve been busy consolidating a couple of European data centers to one location in The Netherlands. Technically this meant we had to migrate a large number of virtual machines with as little downtime as possible across WAN links with varying speeds (30Mbit up to 500Mbit). There are a number of methods to go about this, but we chose to use the vSphere Replication infrastructure which is included in vSphere 5.x for free. Unfortunately there are a couple of downsides in the management interface which become a pain if you have to manage several hundred replications…

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Rebalance VNX storage paths without downtime

Recently I ran into an environment with a couple of VNX5700 systems that were attached to the front-end SAN switches with only two ports per storage processor. The customer was complaining: performance was OK most of the time but at some times during the day the performance was noticeably lower. Analysis revealed that the back-end was coping well with the workload (30-50% load on the disks and storage processors). The front-end ports were a bit (over)loaded and spewing QFULL errors. Time to cable in some extra ports and to rebalance the existing hosts over the new storage paths!

Analyzer Helper Front-End ports

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EMC World – Day 1 – EMC Elect, SuperNAP, VPLEX & VMware

Hi and welcome to EMC World 2013. For those that are unaware what EMC World is: It’s an annual seminar covering all things new and improved that EMC has to offer. It’s hosted in The Venetian hotel in nothing less than … Las Vegas! Your ideal location to learn about the new products EMC is launching, to socialize with fellow EMC customers, partners or employees and of course… to have some fun! 😉

Yesterday we checked in to EMC World, got our access badges and goody bag. This being the first actual day of EMC World, we kicked it off by immediately leaving the premises!EMC Elect Continue reading