Como funciona o UNRAID e a diferença com o RAID tradicional. RAID vs UNRAID

Sempre que eu falo do meu servidor vocês me perguntam como eu escolhi o sistema operacional do meu novo servidor. Foi um processo e nesse vídeo eu conto todas as etapas e todas as coisas que eu aprendi sobre servidores, NAS e storages.

Além disso eu falo como funciona a tecnologia RAID e como o UNRAID implementou o RAID de um jeito diferente para garantir seus dados e economizar espaço nos seus HDDs.

Meu setup:

  • Sony A6400, lente 16-50mm f3.5-5.6
  • Canon M3, lente 22mm f2
  • Canon T5i, lente 24-70mm f2.8
  • Rode VideoMic micro
  • Rode VideoMic Go
  • Tascam DR-05
  • Samsom G-TRACK
  • MacBook Pro 2015
  • Dell Inspirion 7567 Gaming
  • Editado por Luke at you

#developer

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Como funciona o UNRAID e a diferença com o RAID tradicional. RAID vs UNRAID
Alayna  Rippin

Alayna Rippin

1596973560

Software RAID Vs Hardware RAID: A Tutorial | Liquid Web

What is RAID?

RAID (or a Redundant Array of Inexpensive Disks) is a way of storing logical data across a medium which is composed of multiple physical hard disk drives blended into one or more logical units or volumes that is used for data redundancy, performance improvement, and reliability.

In this article, we will review what a RAID is, what it consists of, its types (Software and Hardware RAID), storage methods as well as their advantages and disadvantages.

In a specific sense, RAID uses an array of several drive disks which creates a fault-tolerant and high-available arrangement of disks using mirroring or striping. Mirroring is defined as storing files on a set of drives in the server that have been copied in an identical manner across several drives. Striping (or alternation) is defined as storing split files into multiple parts which alternate across the disks. In some RAID configurations, both mirroring and striping is used.

Striped

Mirrored

Striped and Mirrored

The distinctions in the ways of using mirroring, alternation, and parity management define different RAID levels. Let’s overview them:

  • RAID 0 – productive disk array with file alternation but not failure tolerant
  • RAID 1 – mirroring disk array
  • RAID 5 – disk array characterized by block-level striping and an absence of dedicated parity disk
  • RAID 10 – RAID 0 array made of RAID 1 arrays

There are several other RAID levels, but the most popular are listed here. RAID arrays are very popular in designing SAN’s or NAS devices.

What is RAID Parity?

Certain RAID methods use what is called a parity bit which is a common method of error detection during the transmission and storage of data on the array. Parity adds a checksum to the data being shared to a target drives to ensure the data is as close as possible to be indistinguishable from the data on source drives. RAID 5 primary uses parity in its methodology.

Software RAID

It’s important to remember that a RAID controller is at the core of the RAID system. It plays a vital role in data distribution among RAID disk arrays including both Software and Hardware RAID.

Software RAID uses the functionality of the RAID software or the RAID driver built in to the servers operating system. This method does not require any additional equipment to connect storage devices. It can however increase the overall processing load on a server and possibly slow RAID calculations, and other processes being carried out on the device.

Many server operating systems support RAID configuration, including ones from Apple, Microsoft, and various versions of Unix/Linux systems. Quite often, Software RAID depends on the operating system being used, so it’s not recommended for the divisions which are shared by multiple operating systems.

Advantages

  • Most operating system support RAID Software configurations which makes it easier to set up and accomplish configuration tasks which solves different issues
  • Software RAID installation is much cheaper as it does not require and additional hardware equipment
  • Software RAID is mainly suitable for processing simple RAID 0, RAID 1, and RAID 10, which does not cause additional system load
  • We can implement a RAID configuration on one operating system (e.g. Ubuntu) and use it across other like systems
  • RAID level re-configuration is possible as the settings are flexible and not complicated.

Disadvantages

  • Software RAID can significantly influence general system load while carrying out a complicated RAID configuration
  • Software RAID implementation is not useful if there are multiple drivers installed on the system, as some conflicts could occur
  • Some operating systems support only a limited type of levels of RAID (such as RAID 3, 4, 6, 50, 60, etc.)
  • There is limited opportunity to use RAID on a clustered operating system
  • Software RAID can be vulnerable to viruses and other malware as it operates within the primary servers operating system
  • System failures on the server can have a negative influence on data integrity
  • Replacement of failed disk can be complicated

Having looked into Software RAID and some of its advantages and disadvantages, we can conclude that this method can be used for small projects with a limited budgets and when computing power, maximum data safety, and speedy data and disks recovery are not priorities.

Also, it’s essential to keep in mind that these are only general recommendations as the choices will depend on project needs and the tasks which are required to be accomplished.

Hardware RAID

Hardware RAID is the method where all the drives are connected to a hardware RAID controller, which is on a separate RAID card, different server, or built into a motherboard. Hardware RAID controllers physically manage RAID arrays, configurations and support multiple RAID levels. In some cases, the RAID controller can act as a mini version of a computer as they come with dedicated processors to carry out their tasks.

During the Hardware RAID installation process, drives connect to the RAID controller board. This applies not only for large servers but also for desktop computers. Processing Hardware RAID refers to discrete controllers (such as ATA RAID, SATA, DELTA PLC, etc.) on the level of the disk’s storage system.

Because the RAID is managed by and processed on the controller board, there is no additional load on the server processor. Utilizing Hardware RAID also has many other extended functionalities, including a hot swap disk option in case of any one single disk failures. Additionally, Hardware RAID is more expensive than Software RAID, but it has higher productivity and functional compatibility.

Advantages

  • High level of system productivity is especially essential for old systems with limited resources to increase computing power
  • Hardware RAID uses its cache-memory for making a backup copy and data recovery
  • There are fewer issues with RAID systems during the creation of a backup copy and data recovery
  • Flexibility while configuring RAID, which is complicated to realize without equipment
  • Protection from data loss and corruption may occur if there’s a power outage during the creation of a backup copy as Hardware RAID uses backup batteries and its built-in flash memory
  • Works well on all types of disks
  • Easy to move the box between computers, servers, and OS
  • Compatibility with various OS
  • Additional RAID levels (such as RAID 5, 6, 50, 60) can be used; however, they require more resources

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Como funciona o UNRAID e a diferença com o RAID tradicional. RAID vs UNRAID

Sempre que eu falo do meu servidor vocês me perguntam como eu escolhi o sistema operacional do meu novo servidor. Foi um processo e nesse vídeo eu conto todas as etapas e todas as coisas que eu aprendi sobre servidores, NAS e storages.

Além disso eu falo como funciona a tecnologia RAID e como o UNRAID implementou o RAID de um jeito diferente para garantir seus dados e economizar espaço nos seus HDDs.

Meu setup:

  • Sony A6400, lente 16-50mm f3.5-5.6
  • Canon M3, lente 22mm f2
  • Canon T5i, lente 24-70mm f2.8
  • Rode VideoMic micro
  • Rode VideoMic Go
  • Tascam DR-05
  • Samsom G-TRACK
  • MacBook Pro 2015
  • Dell Inspirion 7567 Gaming
  • Editado por Luke at you

#developer

Autumn  Blick

Autumn Blick

1598839687

How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

  • Performance: It delivers optimal performance.
  • Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
  • UI design: React Native enables you to design simple and responsive UI for your mobile app.
  • 3rd party plugins: This framework supports 3rd party plugins.
  • Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

  • Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
  • Near-native user experience: React Native provides several native components, and these are platform agnostic.
  • The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

#android app #frontend #ios app #mobile app development #benefits of react native #is react native good for mobile app development #native vs #pros and cons of react native #react mobile development #react native development #react native experience #react native framework #react native ios vs android #react native pros and cons #react native vs android #react native vs native #react native vs native performance #react vs native #why react native #why use react native

james allen

1611609121

Quick Pay Portal | www.quickpayportal.com | www.quickpayportal.com

Pay Medical Bills your bills @https://sites.google.com/view/www-quickpayportal-com/

It is really very easy to pay your bills at [priviabillpay.com](https://sites.google.com/view/www-quickpayportal-com/ "priviabillpay.com"). First of all, patients will have to go to the official Privia Medical Community Online portal . Patients can use the quick pay code of priviabillpay.com to make a one-time payment. On the first page of your statement, the QuickPay code is found. Using Priviabillpay to follow a few steps to get paid.

First of all, you must visit the official portal at [www.priviabillpay.com](https://sites.google.com/view/www-quickpayportal-com/ "www.priviabillpay.com")

In the box, fill out the QuickPay Code and tap Make a Payment.

You will be redirected to a page showing all your current rates.

Now select the fees you want to pay and click the check box that you want to accept quickly.

Finally, click on the payment option button.

Your payment details will be asked on the screen.

Fill out the field required and submit your payment.

Our Official Website : https://sites.google.com/view/www-quickpayportal-com/

#www.priviabillpay.com #www-quickpayportal-com #quickpayportal.com #www.quickpayportal.com. #quickpayportal.com.