THE WHATIS.COM WORD-OF-THE-DAY August 17, 2001 high availability ______________ TODAY'S SPONSOR: **STORAGE DECISIONS 2001** Storage Decisions 2001 brings together top storage analysts like Gartner's VP Nick Allen and Steve Duplessie of ESG and expert technologists like best-selling author Jon William Toigo. This exclusive conference is FREE to members who qualify. Apply today. http://ad.doubleclick.net/clk;3177364;5058249;p?http://www.StorageDecisions2001.com _____________ KNOW-IT-ALL QUESTION OF THE DAY! (NEW!) Are you a real "Know IT All"? Try answering today's question to find out if you deserve the title! This is programmable read-only memory that can be erased by shining an intense ultraviolet light through a window in the memory chip so that the memory can be re-used. a. Sequential Couleur avec Memoire b. virtual memory c. grating light valve technology d. extreme ultraviolet lithography e. erasable programmable read-only memory Check to see if you were correct: http://searchwindowsmanageability.techtarget.com/originalContent/0,289142,sid33_gci761375,00.html _____________ TODAY'S WORD: high availability See our definition with hyperlinks at http://searchsystemsmanagement.techtarget.com/sDefinition/0,,sid20_gci761219,00.html In information technology, high availability refers to a system or component that is continuously operational for a desirably long length of time. Availability can be measured relative to "100% operational" or "never failing." A widely-held but difficult-to-achieve standard of availability for a system or product is known as "five 9s" (99.999 percent) availability. Since a computer system or a network consists of many parts in which all parts usually need to be present in order for the whole to be operational, much planning for high availability centers around backup and failover processing and data storage and access. For storage, a redundant array of independent disks (RAID) is one approach. A more recent approach is the storage area network (SAN). Some availability experts emphasize that, for any system to be highly available, the parts of a system should be well-designed and thoroughly tested before they are used. For example, a new application program that has not been thoroughly tested is likely to become a frequent point-of-breakdown in a production system. RELATED TERMS: availability http://searchhp.techtarget.com/sDefinition/0,,sid6_gci213489,00.html five 9s http://searchsystemsmanagement.techtarget.com/sDefinition/0,,sid20_gci761286,00.html failover http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci753437,00.html ________________ S E L E C T E D L I N K S [1] Evan Marcus, Principal Engineer for Data Availability at Veritas, talks about "What High Availability Really Means in a 7 x 24 x Forever World." http://searchhp.techtarget.com/onlineEventsTranscript/0,289691,sid6_gci529200,00.html [2] At SearchHP.com, Evan Marcus also answers questions on "As the Expert." http://searchhp.techtarget.com/ateQuestionNResponse/0,289625,sid6_cid405760_tax287540,00.html __________________________ SUPPORT OUR SPONSOR! *STORAGE DECISIONS 2001** Storage Decisions 2001 brings together top storage analysts like Gartner's VP Nick Allen and Steve Duplessie of ESG and expert technologists like best-selling author Jon William Toigo. This exclusive conference is FREE to members who qualify. Apply today. http://ad.doubleclick.net/clk;3177364;5058249;p?http://www.StorageDecisions2001.com _________________________ RECENT ADDITIONS [1] Mammoth http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci759347,00.html [2] DLT http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci759350,00.html [3] magnetomotive force http://whatis.techtarget.com/definition/0,,sid9_gci759327,00.html [4] AIT http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci759328,00.html [5] 1000BASE-T http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci759355,00.html ======================================================== If you would like to sponsor this or any techtarget newsletter, please contact Gabrielle DeRussy at [EMAIL PROTECTED] ======================================================== If you no longer wish to receive this newsletter simply reply to this message with "REMOVE" in the subject line. Or, visit http://WhatIs.techtarget.com/register and adjust your subscriptions accordingly. If you choose to unsubscribe using our automated processing, you must send the "REMOVE" request from the email account to which this newsletter was delivered. Please allow 24 hours for your "REMOVE" request to be processed.
