Home > Articles > Networking > Network Design & Architecture

A Blade Server Primer

Like this article? We recommend

The Big Issue for Blade Servers: Management

Currently, blades represent only a tiny fraction of the server market. Given the growing demands being placed on the data center, this situation is likely to change. Because data centers account for half of corporate IT budgets, this is potentially a very large market.

My own opinion about blade technology is that its success hinges on the availability of suitable effective, generic management technology. The telecom sector labors under the burden of non-interoperable management systems; it's essential that the same mistake not be made in the blade arena. This is particularly important in the data center, where there is a tradition of mixing and matching vendors, devices, and technologies.

Specifically, there is a need for comprehensive, vendor-independent blade server management systems. Interestingly, the requirements for blade server management are not dissimilar from those of network management [1] and include the following capabilities:

  • Facilitate the safe addition and removal of blades

  • Monitor the status of all blades

  • Provision a "service" across more than one blade

  • View the status of a multi-blade service

  • Interpret service-level blade events

  • Assure service levels across blades

  • Bill for blade resource consumption

  • Verify security levels across blades

  • Perform capacity planning for new and upgraded services

Let's take a brief look at these issues in the next few sections.

Adding and Removing Blades

Blade technology facilitates hot swapping of chassis blades. This has long been a telecom feature. (I recall working in a telecom company on the development of a PBX feature card for wireless telephony. While debugging the card, I needed to reboot it and pulled it from the live switch—an action that resulted in a few irate users whose calls were dropped. My defense was that it was a feature under development!) The management system should make cards safe for removal and insertion as necessary. If problems are occurring in the blade system, the management system should know about this by constantly monitoring the status, which should be reflected in some obvious fashion—perhaps color-coded GUI icons.

Blade Applications: The Role of Services

Online brokerages and Internet auction sites typically offer web-based front-end systems for traders. In this case, the service is composed of real-time (or near real-time) access to some combination of a web server and back-end database. Blade systems can be used here to aggregate user access into the back-end systems. This service is very important to the service provider, so provisioning and managing it in a virtualized fashion is a key requirement, particularly when the service involves many blades.

Service Manipulation

The ability to manipulate entire services rather than individual blade resources is a key management system feature. It becomes important to think about the service lifecycle, in which the service is initially conceptualized, designed, modeled, created, deployed, updated, and eventually retired.

After deployment on the blade servers, the manager wants to be able to monitor the overall service status. Hardware and software operate in the real world with service-affecting faults and bugs—any such events may have an effect on the service. Again, the network manager will want to see the effects—preferably before the service is affected; that is, she wants to ensure that the service remains operational.

Billing is always an important issue for service providers, so it's possible that the network manager may at some point want to be able to produce bills for blade resource use. Similarly, security of blade resources is important when blades are used by sensitive or mission-critical applications.

As the user population grows for blade-based services, the network manager will be faced with the problem of capacity planning. Again, if the service is virtualized across the blade resources and represented in the management system, the latter should provide a modeling facility in which the manager can carry out what-if tests, increasing capacity as required and verifying that the service is appropriately upgraded. Only when the modeling is complete would any changes be made in the blades.

Existing blade management systems don't fulfill many of these requirements, but it's important to keep them in mind prior to deploying the technology. In an ideal world, you should be able to mix-and-match blades from different suppliers and manage them all using a vendor-independent management system.

In addition, there are requirements that are specific to blade servers:

  • Backup and restore

  • Disk management

  • Patch distribution

  • License tracking

  • Virus checking

  • Antivirus software deployment

As for the service-level blade issues described earlier, the management system should facilitate these requirements.

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.

Overview


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information


To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information


Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


This site is not directed to children under the age of 13.

Marketing


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information


If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information


Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020