Data Center
Top Stories
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News
21 Oct 2026
Nvidia, Schneider Electric test digital twin for AI data center ops
Nvidia and Schneider Electric are testing a digital twin at Portugal's SINES data center campus to model AI workloads, power and cooling before infrastructure changes. Continue Reading
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News
21 Oct 2026
CBRE to acquire Onnec in $1 billion data center infrastructure deal
CBRE will acquire Onnec for up to $1 billion, expanding its global data center infrastructure services as hyperscalers demand more fiber, networking and deployment expertise. Continue Reading
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Tip
02 Aug 2011
Selecting raised floors, panels for the data center
Choosing raised floor panels capable of supporting the weight of data center equipment cabinets requires taking a close look at strength ratings and manufacturers’ claims. Continue Reading
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Tip
01 Aug 2011
Server refresh options: When to rent a server vs. when to buy
Companies looking to replace old hardware must consider long-term goals and evaluate financing options when deciding whether to buy or rent a server. Continue Reading
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Tip
28 Jul 2011
When is server hardware too old?
Modern server hardware is allowing systems to handle more jobs and last longer, easing capital expenses for many data centers. Continue Reading
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Tip
19 Jul 2011
Transaction and database management on z/OS mainframe systems
Transaction and database management tools for mainframe systems, such as CICS, IMS and DB2, have been around for decades, but have evolved over the years to fit the needs of enterprise customers. Continue Reading
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Feature
18 Jul 2011
Case studies show the benefits of virtualization
These case studies demonstrate how businesses have deployed virtual machines to improve efficiency and add computing power, while also saving money. Continue Reading
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Tip
12 Jul 2011
Configuring the ESXi firewall in VMware vSphere 5
The ESXi 5 hypervisor has a new firewall, similar to the ESX firewall of yore. You can configure it through the vSphere Client or command line, depending on your preference. Continue Reading
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Tip
29 Jun 2011
Data center design standards for cabinet and floor loading
The weight of today’s racks and equipment cabinets can stress floor structures, making it crucial to consider floor loading requirements in your data center design. Continue Reading
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Tip
28 Jun 2011
What to look for when conducting benchmark tests with PerfMon
Microsoft's PerfMon benchmark tests measure a wide range of processes and server aspects, but it can be difficult for IT professionals to understand the numbers and interpret the results. Continue Reading
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Tutorial
12 May 2011
VMware storage options and Storage vMotion: A guide
VMware storage options include VMFS, thin provisioning, NFS and block-level storage. Virtualization storage features such as VMware Storage vMotion also help protect VM data. Continue Reading
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Tip
11 May 2011
Deleting virtual machine snapshots without wasting disk space
You can avoid wasting disk space and performance problems when deleting, or committing, virtual machine snapshots. Continue Reading
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Tip
26 Apr 2011
Creating RPM packages in Linux
RPM software management on Linux systems truly has an advantage when you create your own RPM packages. Learn how to use the enhanced vim option to automatically generate a template file after creating a new RPM file with the .spec extension. Continue Reading
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Tip
15 Apr 2011
Safer failover testing procedures for the data center
Haphazard failover testing can be dangerous, but you can minimize the potential risk of data loss or corruption by following a few straightforward procedures. Continue Reading
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Feature
11 Apr 2011
Forming a vSphere upgrade strategy: Upgrading vCenter Server and ESX, ESXi
During the vSphere upgrade process you will need to upgrade your customer’s vCenter Server, ESX and ESXi hosts and virtual machines. Get the best upgrade methods in this chapter excerpt. Continue Reading
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News
22 Mar 2011
Dell Viking micro server recast as PowerEdge C5000
The Dell Viking started out as a custom box for low-end dedicated hosting and has graduated to a full-fledged micro server platform. Continue Reading
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Tip
14 Mar 2011
Using DCIM tools to monitor data center power
Although DCIM tools include many capabilities for monitoring data center power and facilitating data center management, you should know their associated costs before implementing projects. Continue Reading
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News
03 Mar 2011
1U servers: Features and capabilities introduction
1U servers are well suited to many everyday business tasks. This overview considers the key features -- from processor and memory support to network ports-- of various 1U server offerings. Continue Reading
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Tip
08 Feb 2011
Increasing network bandwidth available to virtual machines
These three tips on increasing the amount of network bandwidth available to your VMs, including virtual network creation, can also potentially increase a host server's VM density. Continue Reading
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Feature
02 Feb 2011
Enabling VMware HA, DRS: Advanced vSphere features
Learn how to configure vSphere features such as VMware HA and DRS that will ease VM management if a host failure occurs and help balance resources in your customer's environment. Continue Reading
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Feature
02 Feb 2011
VSphere Fault Tolerance requirements and FT logging
To provide continuous availability for a VM in case of a host failure, you'll need a strong understanding of VSphere Fault Tolerance (FT) requirements and FT logging. Continue Reading
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Feature
26 Jan 2011
Linux/UNIX directories and shell commands for VARs
The Linux/UNIX directories and shell commands listed in this chapter excerpt will be valuable to solution providers trying to customize their customers' Linux environments. Continue Reading
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Tip
18 Jan 2011
Working with Linux file system attributes
File system attributes can provide a valuable addition to the way you ensure security on your Linux server. Learn how to mount, list and change file system attributes in ext4. Continue Reading
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Tip
03 Jan 2011
Improving IT efficiency with server virtualization technology
The Motley Fool turned to server virtualization technology as its answer to improving IT efficiency and flexibility in the wake of rampant data center growth. Continue Reading
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Tip
15 Dec 2010
Two forgotten but useful CICS transactions
While CICS has evolved its system interface, the lesser-known CICS transactions ADYN and CSFE can still be useful for debugging and other tasks. Continue Reading
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Tip
09 Dec 2010
VMware Fusion performance tips for Mac users
VMware Fusion for Mac allows you to run multiple guest OSes on Mac OS X, but VMware Fusion performance depends on several variables, including memory and hardware configuration. Continue Reading
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Tip
06 Dec 2010
RHEL 6 ditches System V init for Upstart: What Linux admins need to know
System V init is fading to a memory in Linux boot systems as the new Linux disdribution releases, such as Red Hat Enterprise Linux 6, switch to using Upstart. Learn what is different with this boot service and how to work with it to get your Linux boot administration tasks done. Continue Reading
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News
16 Nov 2010
Move over SMPs: Distributed shared memory systems step in
Researchers are building ersatz SMP machines out of commodity x86 boxes, plus specialized hardware and software. Continue Reading
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Tip
08 Nov 2010
Managing virtual data center growth and virtualization challenges
With careful testing, planning and management, virtual data center growth doesn't have to be an issue, even with problems that crop up with some virtualization technologies. Continue Reading
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News
05 Nov 2010
Data center EPO vulnerability fixed in 2011 National Electrical Code
Data centers are no longer required to put the big red kill-switch on exit doors, thanks to a committee that convinced the NFPA to revisit its data center EPO regulation. Continue Reading
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Tip
25 Oct 2010
Creating an inventory with nmap network scanning
Nmap network scanning generates a full system inventory, but it's only usable with the right parameters and output format. Learn how to create an nmap inventory in this tip. Continue Reading
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News
21 Oct 2010
Cisco et al. push memory-dense servers; but at what cost?
Today’s x86 servers offer impressive memory densities, but some IT shops want even more. Continue Reading
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Tip
04 Oct 2010
VMware maintenance checklist: Daily, weekly and monthly tasks
It's easy for systems admins to lose track of tasks when responding to alerts. Break down VMware maintenance into daily, weekly and monthly tasks so that important chores are not overlooked. Continue Reading
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News
01 Oct 2010
The new mainframes: BladeSystem Matrix, Vblock, Exadata and Exalogic
Converged infrastructure platforms like Oracle‘s Exadata offer companies increased performance, but at the cost of vendor lock-in, causing some to dub these the new mainframes. Continue Reading
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Tip
28 Sep 2010
Setting up a syslog server in Linux
A central logging server can make it easier to manage logs. In this tip, learn how to collect and centralize syslog messages from your hosts onto one syslog server in Linux. Continue Reading
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Tip
20 Sep 2010
Uptime, TIA and BICSI: Who runs the data center design standards show?
With three major players in the game, where should you look for data center design standards? This tip discusses the similarities and differences between the Uptime Institute tier system, TIA-942 and BICSI 002-2010. Continue Reading
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Feature
10 Sep 2010
Refresh, Recompose and Rebalance - VMware View: Chapter 10
Mike Laverick explains the VMware concepts of Refresh, Recompose and Rebalance as the three main tasks that may need to be carried out on your linked clones. Continue Reading
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Tip
08 Sep 2010
Kerberos authentication in RHEL: Easing Windows-Linux integration
Kerberos authentication for CIFS offers easier Windows-Linux integration. In this tip, learn how Kerberos authentication works and how to set it up in Red Hat Enterprise Linux. Continue Reading
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Tip
07 Sep 2010
Unix overview: The latest features in AIX, HP-UX and Solaris
Each of the major Unix versions have been updated with useful new features recently. In this overview, get up to date on the features you should know about in the latest releases of IBM AIX, Hewlett-Packard's HP-UX and Oracle's Solaris. Continue Reading
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Tip
19 Aug 2010
The IT chargeback system in a virtual data center
Managing chargeback can be a difficult task. Multiple company departments may share server hardware in a virtual data center. Learn how to implement an IT chargeback system that charges departments for resources fairly. Continue Reading
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Tip
17 Aug 2010
Server virtualization training and education needed for successful virtualization rollouts
Virtualization technology is still a long way from Plug-and-Play. Successful virtualization rollouts need staff with the proper education and skills, and IT admins need to understand when it's time to add staff or tinker with the training. Continue Reading
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Tip
16 Aug 2010
Optimizing Linux swap space usage
Today's powerful servers with plenty of RAM can make swap space seem like a thing of the past, but knowing how much you need can help keep your system running smoothly. Continue Reading
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Tip
04 Aug 2010
Microsoft Windows Server 2008 licensing for virtualization
Choosing the right Windows Server 2008 edition can save big money in a virtual data center. Continue Reading
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Tip
02 Aug 2010
Installing the ModSecurity Web application firewall on Red Hat Enterprise Linux
Learn how to set up the ModSecurity Web application firewall on Red Hat Enterprise Linux 5.4 and Apache Web server 2.2.x. This firewall monitors access to Web servers to ensure that requests are valid and not malicious. Continue Reading
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Tip
26 Jul 2010
Calculating carbon emissions in the data center
While data center carbon measurement is in its infancy and lacks hard standards, it still may benefit IT admins to know basic methods for calculating carbon emissions as carbon legislation begins impacting data centers. Continue Reading
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Tip
12 Jul 2010
Using login banners with VMware View 4
Windows XP login banners can force VMware View end-users to log in twice when they're trying to access their virtual desktops. But there's a better way that uses a single sign-on. Continue Reading
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Tip
07 Jul 2010
How to install Webmin and ease data center server management
In this introduction to Webmin, learn how the tool can make it easier to manage Unix and Linux servers in your data center. An expert describes how to install Webmin and get started with this free systems management tool. Continue Reading
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Tip
28 Jun 2010
Bus track and busway power distribution: Power anywhere?
Bus track and busway power distribution in the data center is a growing trend that allows for greater flexibility and accommodation of rising power densities. This in-depth exploration of bus-type power systems will help you decide whether this is a good option for your data center power infrastructure. Continue Reading
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Tip
28 Jun 2010
VMware vSphere's built-in performance monitoring tools
VMware vSphere features several free performance monitoring tools that can help assess the health of your virtual machines and fix resource bottlenecks. Continue Reading
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Feature
17 Jun 2010
Virtual appliances and the OVF format: The new software packaging
Thanks to the Open Virtualization Format, virtual appliances are the new way to deliver software -- say goodbye to boxes and CDs. Continue Reading
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Feature
16 Jun 2010
VCenter Server installation requirements
Properly preparing for a vCenter Server installation involves identifying hardware, operating system, database and networking requirements before implementation. Continue Reading
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Tip
24 May 2010
Troubleshooting VMware snapshots
Virtual machine (VM) snapshots are a great tool to identify problems with VMs. An expert explains troubleshooting common problems that arise with snapshots in VMware ESX Server. Continue Reading
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Tutorial
17 May 2010
Virtualized data centers: A resource library
Data center managers use virtualization for basic data center needs, such as server consolidation and disaster recovery, and much more. Continue Reading
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Tip
11 May 2010
How to approach IT staffing in today's data center
Virtualization and tight budgets have changed IT staffing in modern data centers. Find out how to blend skills and technology for the best mix. Continue Reading
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Tip
14 Apr 2010
Troubleshooting PGMIDERR/AEI0 ABEND in CICS Transaction Gateway
This tip delves into resolving PGMIDERR/AEI0 ABEND errors within the CICS Transaction Gateway. The solution to these errors isn't always an intuitive one, and may require several additional and lengthy steps along the way. Continue Reading
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Tip
31 Mar 2010
Common security flaws to check for on your Linux-based Web systems
Your Linux server may have Web application-related security vulnerabilities that should be checked out and repaired. These can include passwords, PHP code injection, weak file and directory permissions and outdated Apache and PHP versions. Learn what to look for and how to fix it. Continue Reading
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Tip
23 Mar 2010
Fixing Linux I/O write performance problems
Learn how to optimize your Linux server for I/O writes by adjusting I/O scheduler settings and journaling settings along with some advice about partition set-up. Continue Reading
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Tip
22 Mar 2010
Using common Linux mail clients with an Exchange Server
Begin your migration away from Microsoft Exchange by learning how to set up Linux mail clients, Evolution and Thunderbird, to talk to Exchange. Continue Reading
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Tip
15 Feb 2010
Linux cloning over the network using netcat
Use netcat to clone Linux images over the network onto multiple servers with a series of simple Linux commands including tar, tee, and dd. This alternative to tools like Clonezilla does not require setting up a separate server. Continue Reading
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Tip
26 Jan 2010
Dealing with CICS/MQ trigger interface quirks
Despite its simplicity, the CICS/MQ trigger interface has its share of quirks, such as messages left in queues and uneven workload distribution. An expert shares fixes for common CICS/MQ message triggering problems in this tip. Continue Reading
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Tip
13 Jan 2010
Upgrading to VMware vSphere: Five pros and five cons
Increased performance, scalability and new features top the list as to why you should upgrade to vSphere, but proven product stability, third-party product and hardware compatibility are reasons you may want to stay with VMware Infrastructure 3 for now. Continue Reading
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Tip
16 Dec 2009
What is the free VMware OVFTOOL and how can it help you?
VMware's OVFTOOL is a conversion program that eases distribution of virtual machines, converting them from the OVF format to .VMX, .OVA, .VMX files and others. Continue Reading
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Feature
30 Nov 2009
Monitoring vSphere performance with command-line tools
Use this chapter excerpt to learn about VMware's command-line utilities that can help solutions providers with monitoring customers' performance and resource usage. Continue Reading
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Feature
30 Nov 2009
Monitoring vSphere performance with vCenter Server performance graphs
vCenter Server's performance graphs provide solutions providers with detailed information on vSphere performance, including CPU, memory, disk, network and system data. Continue Reading
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Feature
30 Nov 2009
Monitoring VMware vSphere performance using alarms
Find out how to create and manage alarms using vCenter Server and learn the steps to configuring vCenter Server for email and notifications. Continue Reading
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Feature
30 Nov 2009
Monitoring vSphere CPU and memory usage
Use this chapter excerpt to learn how to create real-time graphs for virtual machines, CPU consumption and memory usage. Continue Reading
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Tip
20 Oct 2009
Developing a successful mainframe migration strategy
A successful mainframe migration strategy requires careful planning to avoid disruption to end users. This tip discusses best practices for migrating, regenerating or replacing mainframe applications. Continue Reading
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Tip
12 Oct 2009
Sizing computer room air conditioners for data center energy efficiency
Choosing a right-sized computer room air conditioner (CRAC) is crucial to data center energy efficiency, but there are many variables to consider. Learn more about data center air conditioning design, maintaining humidity levels and temperature, and managing air flow to determine the best CRAC for your facility. Continue Reading
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Tip
07 Oct 2009
Access and repair an ext3 file system with the superblock
A damaged ext3 file system is accessible and repairable, thanks to the data within either the superblock or the superblock's backup. Continue Reading
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Tip
28 Aug 2009
PowersHell: Factory Reset of ESXi
During the course of my travels in powersHell with VMware – I’ve begun to put together my own JACS (Just-Another-Configuration-Script). The idea is to take a clean-factory set ESXi build, and use purely powersHell to configure it. Continue Reading
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Tip
27 Aug 2009
Troubleshooting Logical Volume Manager boot problems
If Logical Volume Manager (LVM) boots incorrectly, logical volumes are inaccessible and you can't manage server disk space. In this LVM how-to, we offer some simple steps to troubleshoot boot issues with LVM. Continue Reading
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Tip
10 Aug 2009
How to choose the right uninterruptible power supply for your data center
This tip discusses how to choose the right-sized uninterruptible power supply (UPS) for your data center. It also explains common mistakes in UPS sizing and why UPS power ratings can be so confusing. Continue Reading
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Tip
03 Aug 2009
Avoid common pitfalls when calculating data center power load
For data center pros trying to size an air conditioning system or UPS, accurately estimating data center power load is critical. But there are many common pitfalls to avoid. Continue Reading
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Tip
23 Jul 2009
Installing VMware ESXi on a physical server
In this two-part series, we show you how to convert an existing physical server into a virtual machine, then how to install VMware ESXi on the server hardware and load the virtual machine back onto it. Continue Reading
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Tip
08 Jul 2009
Comparing Unix versions: AIX, HP-UX and Solaris
In this comparison of the top Unix versions, learn what distinguishes the file systems, management tools and virtualization products in Sun Solaris, Hewlett-Packard HP-UX and IBM AIX file systems. Continue Reading
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Tip
24 Jun 2009
How to install and use RRDTool to speed up MRTG monitoring
When monitoring a large number of hosts or devices with the MRTG graphing tool, the system experience frequent CPU spikes. In this RRDTool tutorial, learn how to install RRDTool and convert MRTG to use RRD storage to avoid system overload. Continue Reading
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Tip
17 Jun 2009
Troubleshooting Linux boot problems
If your Linux server fails to show the login screen at startup, you have a boot problem. Learn some tricks on how to diagnose and fix a Linux server boot problem from Grub failure to init and runlevels. Continue Reading
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Tip
10 Jun 2009
How to install and configure MRTG, an essential sys admin tool
Multi Router Traffic Grapher (MRTG) is an essential tool that allows systems administrators to monitor and graph network traffic and more. In this tutorial, an expert explains how to install and configure MRTG on Solaris 10. Continue Reading
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Tip
06 May 2009
Capacity planning tools tutorial for Linux and Unix
Effective capacity planning is a proactive way of ensuring that your data center servers will not prematurely run out of space or horsepower. Learn the tools available to help you, both native to Linux and Unix platforms including Solaris, Red Hat, HP-UX, and the free-form products that will work with any Linux or Unix distribution. Continue Reading
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Tip
31 Mar 2009
Air flow management strategies for efficient data center cooling
To achieve efficient data center cooling, you must reduce your facility's air flow waste. In this tip, an expert outlines air flow management strategies and best practices that can improve data center air flow, including the installation of blanking panels, raised-floor tiles and hot-aisle/cold-aisle design. Continue Reading
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Tip
23 Feb 2009
Optimizing server energy efficiency
Reducing data center energy consumption is a hot topic in the IT industry, but server energy efficiency has only recently become a focus of discussion. Improving server efficiency means optimizing the main components that impact a server's overall power consumption: power supply, fans, CPU, memory, hard drives, I/O cards and ports, and supporting chipsets. Continue Reading
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Tip
23 Feb 2009
Recovering RDM data with VMware ESX troubleshooting
Accidentally deleting important VMware ESX partitions cost our expert raw device mapping data. But a last attempt with an unlikely solution finally saved the day – and the data. Continue Reading
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Tip
23 Feb 2009
Why you should delete outdated vCenter Server data
With SQL commands, you can delete superfluous vCenter Server database information and save disk space and boost system performance. But you need to monitor database table size. Continue Reading
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Tip
14 Jan 2009
Manipulating VMware log file space via log file rotation settings
VMware ESX and vCenter log files are crucial for troubleshooting and need to be readily available, but log files can be space hogs. You can tweak log rotation settings to prevent log files from taking up too much space and designate additional space to more important logs such as hostd, vpxa and vpxd. Continue Reading
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Tip
13 Jan 2009
Manage CICS workloads with transaction classes
Using transaction classes is a great way to manage CICS workloads that come in varying or unpredictable increments. Learn how to define transaction classes, calculate a maximum active number and get examples on how to use transaction classes in this tip. Continue Reading
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Tip
06 Jan 2009
Creating virtual machine clones and templates without vCenter Server
Even if you don't have vCenter Server's virtual machine (VM) cloning feature, you can create VM templates with tools such as vConverter, vmkfstools and VMware Infrastructure Client – and a little technological prowess. Continue Reading
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Feature
29 Dec 2008
VMware ESX essentials: Fibre Channel and iSCSI
This section of our chapter excerpt on storage from the book "VMware ESX Essentials in the Virtual Data Center" explains the differences between Fibre Channel and iSCSI as well as the configurations a client is able to use when working with VMware ESX. Continue Reading
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Tip
03 Dec 2008
Understanding VMware ESX virtual machine physical and virtual hardware
You can better manage virtual machines by understanding the virtual hardware that makes up a VM. This tip explores VM physical and virtual hardware issues, including configuring virtual hardware and assigning virtual memory. Continue Reading
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Answer
10 Nov 2008
Solve the startup error 00161 and 00163 with IBM TP600?
Error 00161 on an IBM TP600 may be due to a faulty CMOS battery, and 00163 may relate to your version of utility PS2 EXE. Continue Reading
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Feature
10 Nov 2008
How to solve abend code 4038
A user faces the abnormal ending abend code 4038 in the process of migrating from VS COBOL runtimes to LE. Continue Reading
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Feature
10 Nov 2008
COBOL, VS-COBOL-II and MFCOBOL: What's the difference?
The original COBOL compiler grew into greater addressability with VS- COBOL-II MFCOBOL and increased functionality in MFCOBOL. Continue Reading
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Tip
10 Nov 2008
Improving data center cooling capacity with chilled water plants
With a chilled-water plant, you can improve your data center cooling capacity and possibly prevent more drastic measures, such as having to build a new facility. Continue Reading
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Feature
10 Nov 2008
Override a SYSIN DD DSN in the proc from the JCL?
Override the SYSIN DD Domain Name Source (DNS) in proc using the Job Control Language (JCL) this code syntax. Continue Reading
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Tip
31 Oct 2008
Ensuring server time synchronization with NTP on SLES
Synchronize your SUSE Linux Enterprise Server times using NTP time server. Two servers are recommended for enterprise situations, as redundancy will save the day in case of a disaster. Continue Reading
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Tip
31 Oct 2008
Repairing SUSE Linux Enterprise Server using a Rescue CD
SUSE Linux Enterprise Server offers a Rescue CD for repairing the system if your hardware causes a crash at reboot. This tip shows you how to use it. Continue Reading
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Tip
28 Oct 2008
Use DFHLS2WS to expose CICS applications as a Web service
DFHLS2WS is one of the Web services assistants that allows traditional CICS applications to provide or consume Web services without significant changes and without getting into the details of SOAP or XML coding. Continue Reading
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Tip
30 Sep 2008
How to troubleshoot RHEL performance bottlenecks
This tip provides a step-by-step approach to application-tuning, troubleshooting bottlenecks and enhancing performance on RHEL 5 systems. Continue Reading
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Tip
19 Aug 2008
Using OpenSSL to create and manage certificates
Establishing an independent certificate authority with OpenSSL enables you to create public key certificates and to verify that these public keys are authentic and that email messages are secure. Continue Reading
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Definition
04 Aug 2008
gzip (GNU zip)
Gzip (GNU zip) is a free and open source algorithm for file compression. The software is overseen by the GNU project.... (Continued) Continue Reading
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Definition
22 Jul 2008
DRBD (Distributed Replicated Block Device)
DRBD (Distributed Replicated Block Device) is a Linux-based software component that facilitates the replacement of shared storage systems by networked mirroring. DRBD makes it possible to maintain consistency of data among multiple systems in a network. DRBD also ensures high availability (HA) for Linux applications... (Continued) Continue Reading
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Tip
14 Jul 2008
VMware VI Client plug-ins and how to manage them
VMware VI Client plug-ins can provide a VirtualCenter implementation with a functionality boost. Discover more on plug-in management tactics and plug-in options, including the Juxtaposition RDP plug-in, in this tip. Continue Reading
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Tip
26 Jun 2008
Obtaining server health status in VMware ESX and VMware ESXi
VMware ESXi can easily provide you with information about a server's CPU, memory, storage and more, but getting this info from ESX Server requires some additional steps. Continue Reading