All > Technology > Defense
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All > Technology > Storage
Hardware-specific release. A software product that is restricted to run on an identified platform or subset of platforms. In most cases, an H release is also categorized as an FCS release. Used primarily to enable the timely shipment of new hardware platforms. H releases are identified by the suffix Hx.
- Browse Related Terms: EA, Early Access, GA, General Availability, H release, HA, HA (High Availability), high availability (HA), multiple system high availability, Recommended Release (RR), RR
All > Technology > Defense
All > Technology > Defense
Hardware.
- Browse Related Terms: Architectural Design, Battle Management System, Battle Manager, BMD Event Validation, CHS, Computer Security (COMPUSEC), Fixed Ground Station, H/W, HLD, HW, HW/SW, interface, Life-Cycle Management, System Design, Tank Debris, Testbed, Trap Door
All > Technology > Defense
Higher Authority.
- Browse Related Terms: CA/CRL, DDL, Deviation Criteria, HA, NMA, Obligation Authority, Procuring Contracting Officer (PCO), Program Change Decision, RAA, SSA
All > Technology > Storage
High Availability. NetApp support for failover; that is, one appliance assuming the identity and duties of a failed appliance.
- Browse Related Terms: EA, Early Access, GA, General Availability, H release, HA, HA (High Availability), high availability (HA), multiple system high availability, Recommended Release (RR), RR
All > Technology > Storage
A combination of technology, processes, and support partnerships that provide greater application or system availability.
- Browse Related Terms: EA, Early Access, GA, General Availability, H release, HA, HA (High Availability), high availability (HA), multiple system high availability, Recommended Release (RR), RR
All > Technology > Virtualization
the requirement that a business service be continuously operational for a desirably long length of time.
Tools like VMWare HA can, in case of a server failure, re-start virtual machines, automatically on another server. The tools also monitor the capacity of a server and choose an optimal server for the VM to run. In case of failure of the underlying physical resource, the machine is restarted, not dynamically moved, which means that there will be service downtime. This can be prevented by clustering firewalls even in virtualized network.
- Browse Related Terms: Autonomic Computing, business continuity, Capacity Planning, DR (Disaster Recovery), five nines, grid computing, HA (High Availability), Infrastructure, on-demand computing, policy-based automation, Provisioning, SLA (Service Level Agreement), Utility Computing, workload management
All > Technology > Defense
All > Technology > Defense
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All > Technology > Programming > Perl
Someone who is brilliantly persistent in solving technical problems, whether these involve golfing, fighting orcs, or programming. Hacker is a neutral term, morally speaking. Good hackers are not to be confused with evil crackers or clueless script kiddies. If you confuse them, we will presume that you are either evil or clueless.
All > Technology > Security
A person with special expertise in computer systems and software. A hacker who attempts to gain unauthorized access to computer systems is a “cracker.”
- Browse Related Terms: Buffer Overflow, Cracking (also Crackers), Hacker, IDS Host-Based, Keystroke Monitoring, Min-Entropy, Password Protected, Rootkit, scanning, script kiddie, Signature, Victim
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- All > Law > E-Discovery
All > Technology > Security
An individual who breaches Web sites or secured communications systems to deliver political messages, including those related to foreign policy, or propaganda. It has been described by Naval Postgraduate School Professor Dorothy Denning as “the marriage of hacking and activism.”
- Browse Related Terms: environment, Hacktivist, Information System Owner, Information System Owner (or Program Manager), Remote Maintenance, System Development Life Cycle (SDLC)
All > Technology > Parallel Computing > Cloud Computing > Amazon Web Services
See http://hadoop.apache.org.
- Browse Related Terms: discussion forums, DomainKeys Identified Mail (DKIM), forums, Hadoop, JavaScript Object Notation (JSON), MapReduce, Sender ID, Sender Policy Framework (SPF), Signature
All > Technology > Parallel Computing > Cloud Computing > Amazon Web Services
The HDFS file system stores large files across multiple machines. It achieves reliability by replicating the data across multiple hosts, and hence does not require RAID storage on hosts.
- Browse Related Terms: Amazon Elastic MapReduce, Authentication, Block, block device, canonicalization, distributed cache, Elastic MapReduce (EMR), Hadoop Distributed File System (HDFS), manifest, Queue, read replica, reducer, SIGNATURE file
All > Technology > Defense
All > Technology > Virtualization
A layer between the physical hardware of a computer and the software that runs on that computer designed to hide differences in the underlying hardware, thus allowing software to run on a range of different architectures without being modified for each one. Windows uses different HALs depending, among other factors, on whether the underlying system has one CPU (Uniprocessor (UP) HAL) or multiple CPUs (Symmetric Multiprocessor (SMP) HAL). See also Kernel.
- Browse Related Terms: ccNUMA (cache coherent Non-Uniform Memory Access), HAL (Hardware Abstraction Layer), hardware virtualization, industry standard architecture, Intel architecture, Itanium, NetBSD/Xen, Node, NUMA (Non-Uniform Memory Access), SMP (Symmetric Multiprocessor), Uniprocessor (UP)
All > Technology > Defense
All > Technology > Defense
All > Technology > Defense
The thickness of a given material, which will absorb half the gamma radiation incident upon it. This thickness is inversely proportional to its density and also depends on the energy of the gamma rays.
- Browse Related Terms: Coherence, Half-Value Thickness (HVT), HVT, laser, Laser Weapons, Physical Agents, Pulsed Power EMR, Shielding, Stimulated Emission
All > Technology > Search > SEO / Search Marketing
a page that serves as an index to a group of pages that you would like the search engine spiders to find. Once a search engine spider indexes the hallway page, it should also follow all the links on that hallway page and in turn index those pages as well.
- Browse Related Terms: Agent Name, applet, Bot, Client, Crawler, GoogleBot, Hallway page, Politeness Window, Pop-up, Robot, Spider, Standards compliant, user agent, Web Crawler
All > Technology > Defense
All > Technology > Storage
To stop, in an orderly manner, all activity in a computer system.
- Browse Related Terms: (PC)NFS, administration host, Bus, DNS, Domain Name System (DNS), FQDN, fully qualified domain name (FQDN), halt, High Availability, IPL, network trace, packet trace, server, shut down, traceroute