DATA CENTER BLOG

BLOG - Performance Troubleshooting

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Experiencing performance bottlenecks in your storage environment? Look no further! Learn more about the best ways to measure performance, decrease latency, and efficiently provision capacity within your data center.

2
March

Mistakes That Could Be Hurting Your VNX Performance: Part 2

How-To, Guides, & Tips    •   March 2, 2017

vnx performance mistakesWelcome to part 2 of our series about some mistakes that could be hurting your VNX’s performance. If you missed the first installment of the series, you can read up on it here: Part 1. The aim of this series is to help you understand some of the dos and don’ts when it comes to VNX systems, disk array enclosures (DAE), and drives. We asked our engineering experts to give us some common mistakes people make with VNX and how to avoid them. So, what mistake could be hurting your VNX’s performance?



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19
January

Mistakes That Could Be Hurting Your VNX: Part 1

EMC   •   January 19, 2017

mistakes that could be hurting your vnx What are the biggest mistakes you can make with a VNX? There are a ton of things that range from not checking performance benchmarks to leaving it sitting in your data center collecting dust. No matter your role in a storage environment, making sure all systems work at peak performance should be a top

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22
November

Storage System Failure

Your data is your business’ backbone. Without the structure of your finances, customer database, inventory and administrative information, your business is like a jellyfish floundering in the wide-open sea. Avoiding this catastrophe is a top priority. But what if you have committed to too little, too late in terms of backup, and your storage system does a belly flop into the deep end? After all, you never know what the future holds, whether that be a natural disaster, hackers, or social anarchy. Prepare for anything, even the worst-case scenario, with this recovery advice.

Storage System Flops

If you are experiencing the sudden death of your storage system, there are a couple of things to take into consideration...



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20
September

The More You Know: Measure Storage Performance with IOPS, Latency, Throughput

How-To, Guides, & Tips    •   September 20, 2016

Storage Performance Metrics: IOPS, Throughput, Latency

Applications are the core of your data center. Whether simple or complex, clients and employees expect quick response times from every application they use. This is why optimizing storage performance remains a top priority for CIOs. Yet, with the advent of flash, the storage industry tends to mislead buyers when it comes to measuring performance.



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25
August

Thin Provisioning vs Thick Provisioning: Which One is Best For You?

How-To, Guides, & Tips    •   August 25, 2016

data center picture

No matter your role in a data center, enhancing storage performance is usually a top priority. This is especially true for enterprise applications that are accessed the most. One common practice when it comes to addressing performance and storage needs is provisioning. According to TechTarget, storage provisioning is the process of assigning storage to optimize performance. When it comes to provisioning, thin or thick is usually the question at hand. There are benefits and downsides to both. Today we will go over the pros and cons as well as some best use cases for thin provisioning and thick provisioning.



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14
January

The Best Metric For Measuring Storage Performance

Performance Troubleshooting   •   January 14, 2016

Reliant Technology - Storage Performance MetricsWhen measuring the performance of flash storage, the most commonly used performance benchmarks are throughput and IOPS. But latency may be an even more important metric to consider.

Reducing latency is a major concern for users, and manufacturers have responded by moving flash storage into servers, onto faster buses like PCIe, and even onto memory buses. So, what exactly is the difference between IOPS and latency in terms of performance benchmarking and why may latency be a better performance metric for your storage environment?



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19
October

The Cause of Data Center Downtime: Is Human Error Always to Blame?

Performance Troubleshooting   •   October 19, 2015

Data Center Downtime CausesMurphy's Law dictates, "What can go wrong, will go wrong." This is true in all walks of life, but it is especially prescient in the world of the data center. Data centers are huge enterprises with a wide range of moving parts, any of which can effectively "break down" at a moment's notice. After you experience several instances of something that can go wrong actually going wrong, however, you must begin to ask yourself "why can these things actually go wrong in the first place?" Human error may just be the culprit that you've been looking for.

The Error of Assuming All Data Center Mistakes Are Human Error.

To get to the root of data center downtime, it's important to define what "human error" means in this context. It doesn't mean that employees are making careless mistakes, unless, of course, you made some mistakes in the hiring process. Instead,  hiring the right people for the right positions takes this particular variable out of the equation.

Rather, human error in relation to a data center is typically



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19
March

Performance Metrics for SAN Environments

Performance Troubleshooting   •   March 19, 2015

Reliant Technology - Performance Metrics for your SAN EnvironmentPerformance metrics for SAN environments help to give those within your organization the powerful, real-time and actionable information that they need to make the most informed decisions possible. It's important to understand that performance analysis is not an exact science and is much more of an art form, however. The numbers themselves only tell one part of a much larger story. How you choose to interpret those numbers and the steps that you take thereafter are what will ultimately make the difference between success and failure.

The Percentage of SP Cache Dirty Pages

SP Cache Dirty Pages exist in a write cache and are pages that have already received new data from hosts, but have not yet flushed that data to disk. This percentage should always be relatively high as it increases the chance of additional writes to the same block of data that will ultimately be absorbed by the cache.



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7
January

Performance Troubleshooting Series: How to Avoid Performance Bottlenecks

Performance Troubleshooting   •   January 7, 2015

Reliant - Avoid BottleneckOne of the unfortunate things about performance bottlenecks is that they can essentially occur at nearly any point in a storage system. Storage arrays, hosts and even the network itself can suffer from performance issues during peak usage hours, which are also often the times where you need reliability the most. By identifying and learning more about some of the key culprits of performance bottlenecks within a storage system, you can make adjustments to your own configuration and put in place certain best practices within your organization that can help you avoid them altogether.

Shrinking Backup Windows

One of the biggest sources of performance bottlenecks has to do with a dramatically increased rate of data growth that many different types and sizes of organizations are seeing within the last few years. It is not uncommon to see a company's data growth rate exceed 60% or more on an annual basis. All of this additional data requires faster storage I/O, which can certainly be a tricky balance to try to meet.



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29
December

The More You Know Series: Forced Flushing

Performance Troubleshooting   •   December 29, 2014

Reliant - Forced FlushingOver the past few weeks, we have talked a lot about different key performance indicators and how these may indicate an underlying issue associated with your performance problems. One of the recurring issues brought up was forced flushing. So, today we are going to dive a little deeper into what forced flushing is.

How Does Forced Flushing Occur?

            Let’s say you have an environment that has very high IOPS (Input/Output Operations per Second) requirements that is currently being run on SATA disks. These SATA disks will most likely not have the IOPS capability that is required for your environment.



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