Back to Enterprise Storage
Posted by Jon Toigo on October 11, 2017
No ratings yet.

An under-reported trend in storage these days is the mounting dissatisfaction with server-centric storage infrastructure as conceived by proprietary server hypervisor vendors and implemented as exclusive software-defined storage stacks.  A few years ago, the hypervisor vendors seized on consumer anger around overpriced “value-add” storage arrays to insert a “new” modality of storage, so-called software-defined storage, into the IT lexicon.  Touted as a solution for everything that ailed storage – and as a way to improve virtual machine performance in the process – SDS and hyper-converged infrastructure did rather well in the market.  However, the downside of creating silo’ed storage behind server hosts was that storage efficiency declined by 10 percent or more on an enterprise-wide basis; companies were realizing less bang for the buck with software-defined storage than with the enterprise storage platforms they were replacing.

Shared and Silo'ed storages' components

(more…)

Please rate this

The dark side of converged storage networks
Posted by Andrea Mauro on October 10, 2017
No ratings yet.

Introduction

The fabric of SAN (means Storage Area Network) with Fibre Channel solutions have always been a dedicated network, with dedicated components (like FC switches).

But, starting with iSCSI and FCoE protocols, the storage fabric could now be shared with the traditional network infrastructure, because at least level 1 and 2 have a common Ethernet layer (for iSCSI also layer 3 and 4 are the same of TCP/IP networks).

Hosts (the initiators) in a converged network use typically Converged Network Adapters (CNAs) that provide both Ethernet and storage functions (usually FCoE and iSCSI). The results are that LAN and SAN are shared on the same physical network:

LAN and SAN shared on the same physical network

(more…)

Please rate this

Eliminating Blue Screen or Errors during failover
Posted by Taras Shved on March 15, 2017
4.67/5 (3)

Introduction

The reason for writing this post was a recent case from one of our customers, who ran into an issue when their SAN switch failed. The problem was that their VMs were generating an enormous amount of errors that were caused by the switching of active paths at the time of failover.

Local Machine System Current Controller Set Services Disk

(more…)

Please rate this

Fibre Channel: Concepts and Configuration
Posted by Taras Shved on March 3, 2017
5/5 (3)

Introduction

This article is intended to introduce you to the main concepts and features of Fibre Channel (FC), the high-speed network technology and a relevant family of standards (protocols) for storage networking that was standardized in 1994.

FC is one of the first technologies used for connecting data storage to servers, for example, in Storage Area Networks (SAN). On the physical layer, it is typically built with optical fiber cables. There are three major Fibre Channel topologies: Point-to-Point, Arbitrated Loop, and Switched Fabric. FC is available at 1, 2, 4, 8, 10, 16, 32 and 128 Gbit/s speeds.

Inverted pyramid of doom

(more…)

Please rate this

Hyper-V backup challenges Windows Server 2016 needs to address
Posted by Didier Van Hoye on September 12, 2016
4.75/5 (8)

Introduction

Personally I have been very successful at providing good backup designs for Hyper-V in both small to larger environments using budgets that range in between “make due” to “well-funded”.  How does one achieve this? Two factors. The first factor is knowing the strengths and limitations of the various Hyper-V versions when you design the backup solution. Bar the ever better scalability, performance and capabilities with each new version of Hyper-V, the improvements in back up from 2012 to 2012 R2 for example were a prime motivator to upgrade. The second factor of success is due to the fact that I demand a mandate and control over the infrastructure stack to do so. In many case you are not that lucky and can’t change much in already existing environments. Sometimes not even in new environments when the gear, solutions have already been chosen, purchased and the design is deployed before you get involved.

Windows Server 2008 (R2) - 2012 Hyper-V Backup
(more…)

Please rate this

Why moving from Windows Server 2012 R2 to 2016 for Hyper-V
Posted by Romain Serre on August 16, 2016
5/5 (9)

Windows Server 2016 will be released the next month said Microsoft the last month. Windows Server 2016 brings a lot of new features compared to the last Windows Server version for Hyper-V, networking and storage. In this topic I will try to convince you to move from prior Windows Server edition to Windows Server 2016 with eight reasons.

Virtual Server (more…)

Please rate this

Virtual Volumes (VVols) backup – how it works and which solutions should be used
Posted by Alex Samoylenko on April 27, 2016
4/5 (3)

Many of you have heard of Virtual Volumes (VVols) storage technology, which allows essential increasing of storage I/O performance within VMware vSphere environment by using logical volumes for certain virtual machines components and transferring of some storage operations to disk arrays.

 Backup infrastructure

(more…)

Please rate this

SAN: Unexpected
Posted by Anton Kolomyeytsev on June 15, 2015
Tags:
4.5/5 (2)

I wonder what people have in heads when they pick up names for their businesses… (more…)

Please rate this