CloudLinux - CloudLinux Announces Per-Customer Disk I/O Limits for Shared Hosting

CloudLinux Announces Per-Customer Disk I/O Limits for Shared Hosting

Princeton, NJ (PRESS RELEASE) October 15, 2012 – Extending the features of its innovative operating system (OS), the only OS developed exclusively for shared hosting providers, CloudLinux ( announced today new tools to limit disk I/O processes. With the launch of this feature, shared hosting providers will finally be able to fill their servers while guaranteeing consistent performance, thereby reducing storage device load and minimizing the risk of server failure.

“Disk I/O is a significant factor in the performance of a shared web hosting server,” says Igor Seletskiy, Founder and CEO at CloudLinux. Hard disk drives are the slowest component in the average web server. As hosting providers attempt to maximize the number of accounts on their hardware, the hard drive is the bottleneck that slows down overall performance, and if left unchecked, can lead to complete hardware failure. CloudLinux allows hosting providers to restrict disk I/O on a per-customer basis, ensuring that every user receives consistent and dependable performance.

Disk I/O (Input/Output) describes every process that involves writing to or reading from a storage device. On a shared web hosting server, this storage device is usually a hard disk drive, or HDD. However, I/O processes to an HDD are particularly slow. Compared with solid-state memory such as RAM, HDD I/O is, on average, 2,000 times slower. With potentially hundreds or even thousands of shared hosting accounts on one hardware server, requests to write or read information are often left waiting in a queue while other processes complete. If a server is particularly busy or one website is experiencing a heavy load, this can result in long page-loading times. On some occasions, visitors can even encounter browser timeouts that prevent them from accessing information at all. With the ability to limit disk I/O operations on a per-customer basis, CloudLinux allows hosting providers to confidently fill their servers with shared hosting accounts, without the fear of unpredictable usage and poor server-wide performance.

The more accounts shared hosting companies put on their servers, the more noticeable slow disk I/O becomes, explains Seletskiy. CloudLinux has always been developed with the goal of helping hosting companies fill their servers without compromising performance. Now, our customers will be able to allocate disk I/O limits for every customer, exercising more control over how accounts are used. Alongside the existing features of CloudLinux, disk I/O limits will give hosting providers more control over their servers, and as a result, more flexibility.

A distribution of Linux, an operating system renowned for dependable performance, CloudLinux places each shared hosting account in an isolated container called a Lightweight Virtual Environment (LVE). Using the included LVE Manager, hosting companies can then define specific resource allocations for each individual account. Administrators can limit CPU, RAM, MySQL , and now, disk input and output. These resources can also be limited on a per-package basis, allowing hosting providers to offer tiered shared web hosting plans, each with its own hardware allocation. As a result, server performance remains consistent, even as the capacity of a server is pushed. In addition, the behavior of a single customer does not affect the speed and responsiveness of other users on the server. Hosting providers can increase their revenue by maximizing the number of accounts on their hardware, while committing to guaranteed performance for their customers.

Shared hosting companies are adopting CloudLinux because we can help them earn more money from their hardware, without affecting quality of service, says Seletskiy. CloudLinux allows hosting providers to take control of their hardware across a number of different limits. Disk I/O limits have been widely requested by our customers, and we are pleased to announce the production of this new feature. Hosting providers can now control their servers in more precise detail than ever before.

As an innovative, forward-thinking developer, CloudLinux has established itself as a leading choice of shared hosting operating system. Now, with the addition of disk I/O limits to an already extensive range of features, CloudLinux continues to lead in the shared hosting marketing.

About CloudLinux

CloudLinux was founded in 2009 to address the distinctive needs of web hosting providers. The company’s headquarters are in Princeton, New Jersey, and its development team, composed of employees with an appreciable proficiency in the hosting business, is based in Donetsk, Ukraine. CloudLinux is a stable, privately funded company geared toward providing the ideal operating system (OS) to make even the most intricate and divergent hosting needs more straightforward. The companys flagship OS is optimized to help hosting providers deliver more stable shared hosting services, with account isolation and resource allocation on an OS level.

For more information on CloudLinux, visit

Media Contact:

Dave Young

CloudLinux (Press: Young Copy)


dave [at]

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