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Topic: Extent

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	Extent Attributes
		The extent allocation policies associated with a file are referred to as the extent attributes of the file.
		Some of the extent attributes are persistent and become part of the on-disk information about the file, while other attributes are temporary and are not maintained when the file is closed or the system is rebooted.
		If a file is large and sparse and its write size is fixed, a fixed extent size that is a multiple of the write size can minimize space wasted by blocks that do not contain user data due to misalignment of write and extent sizes.
	docsrv.sco.com /ODM_FSadmin/fssag-6.html (1965 words)

	Extent - Wikipedia, the free encyclopedia
		An extent is a contiguous area of storage in a computer file system, reserved for a file.
		When starting to write to a file, a whole extent is allocated.
		Note that a file system can be extent-based (i.e., addressing via extents rather than in single blocks) without requiring that each file be limited to a single, contiguous extent.
	en.wikipedia.org /wiki/Extent (138 words)

	Class ninja.sds.Extent (Site not responding. Last check: 2007-10-23)
		Any zeros in the mask mean that the Extent can have all IP addresses that have either a 1 or 0 in that bit position.
		In terms of extents, this equality means that their base IP address and the mask are equal between the two objects.
		The string should be formatted by having a list of extents, each separated by either a comma or a space.
	ninja.cs.berkeley.edu /javadocs/ninja.sds.Extent.html (380 words)

	Extent of the Wet Snow Zone
		While the ECHAM model produces intense melting mostly along the western and northern coast of Greenland throughout the summer, the extent of the wet snow zone predicted by the MIT model is concentrated in the southern half of the ice sheet and extends further inland.
		Except for June when the extent of melting is underestimated, both the areal extent and intensity (in terms of % of days which experience melting) of the melting predicted by the MIT / snowpack model match observations fairly closely.
		The areal extent of the melt zone predicted by the MIT model is therefore closer to observations than that predicted by the ECHAM model.
	web.mit.edu /globalchange/www/reports/054/node12.html (687 words)

	Maximum Melt Extent on Greenland Ice Sheet, 2002
		Analysis of melt extent on the Greenland ice sheet using passive microwave satellite data have shown a very dramatic increasing melt trend since 1979 which appeared to be interrupted only in 1992 by the eruption of Mt. Pinatubo.
		This year's melt extent seems to be a new record which has surpassed the maximum extent derived from the past 24 years of passive microwave satellite data.
		Finally, the relationship between coastal temperatures and melt extent suggest an increase in surface runoff contribution to sea level of 0.31 mm/yr for a 1°C temperature rise according to a recent paper by Adalati and Steffen (2001).
	cires.colorado.edu /steffen/melt (443 words)

	Info: (lispref) Extent (Site not responding. Last check: 2007-10-23)
		Extent ------ "Extent" refers to the time during program execution that a variable name is valid.
		One alternative to dynamic extent is "indefinite extent".
		This means that a variable binding can live on past the exit from the form that made the binding.
	www.cit.gu.edu.au /teaching/2105CIT/cgi-bin/info2html.cgi?(lispref)Extent (206 words)

	GIS-based Estimates of Wetland Extent / Impacts from the Proposed Pumping (Site not responding. Last check: 2007-10-23)
		It must be understood that estimation techniques based on remotely-sensed data are never as accurate as on-site techniques, and in the case of significant impact to national wetland resources, on-site techniques are preferred to fully document potential wetland loss and impact.
		Given the amount of information and databases available for this basin, we determined that a conservative analysis of wetland extent should be based on the extent of the 2-year floodplain and the presence of hydric soils (wetlands extent above the 2-year floodplain was also determined and is discussed in section 2).
		However, GIS methods allow for an estimation of the wetland extent at a landscape-level, and additionally allow for an estimation of anticipated hydrologic impacts due to a pumping plant operating to 87 feet.
	www.epa.gov /region4/water/specialprojects/yazoo/gis.htm (2112 words)

	Star Sapphire Common LISP Reference Manual--Scope and Extent
		Extent refers to a duration in time when references to a variable can occur.
		Dynamic extent means that references may occur at any time between the establishment of the entity and the explicit disestablishment of the entity.
		In essence, reference by name to an entity with dynamic extent will always refer to the most recently established (and not yet disestablished) instance of that entity.
	www.webweasel.com /lisp/doc/cl03.htm (2083 words)

	Commands Related to Extent Attributes
		The extent attribute information may be lost if the destination file system does not support extent attributes, has a different block size than the source file system, or lacks free extents appropriate to satisfy the extent attribute requirements.
		Whenever a file is copied, moved, or archived using commands that preserve extent attributes, there is nevertheless the possibility of losing the attributes.
		The same source and target file systems in the preceding example with a file carrying a fixed extent size of 4 could preserve the attribute; a 4 block (4096 byte) extent on the source file system would translate into a 1 block extent on the target.
	docs.hp.com /en/5971-4772/ch03s03.html (571 words)

	3. Scope and Extent
		Within Common Lisp a referenceable entity is established by the execution of some language construct and the scope and extent of the entity are described relative to the construct and the time (during execution of the construct) at which the entity is established.
		Therefore entities with dynamic extent obey a stack-like discipline paralleling the nested executions of their establishing constructs.
		In the case of dynamic extent if the time intervals of two entities overlap then one interval will necessarily be nested within the other one.
	www.oopweb.com /LISP/Documents/cltl/Volume/node43.html (1785 words)

	XEmacs Lisp Reference Manual - Extent Parents (Site not responding. Last check: 2007-10-23)
		If this is the case, the extent derives all its properties from that extent and has no properties of its own.
		Through this, a whole tree of extents can be created, all deriving their properties from one root extent.
		The children of an extent are all those extents whose parent is that extent.
	www.tau.ac.il /cc/pages/docs/xemacs/lispref_562.html (225 words)

	AskTom "extent sizing"
		A Co-worker suggest that we should at least size the initial extent to the maximum 2 gigs and have the next be 512MB because we know that the table will always be at least 3 gigs and will continue to grow.
		Using more than one extent in a table, cluster, or temporary segment does not materially affect the performance of full scans on a dedicated single-user batch processing system, if the extents are properly sized and if the application is designed to avoid expensive DDL operations.
		If extent sizes are appropriately matched to the I/O size, then the performance cost of having many extents in a segment is minimized.
	asktom.oracle.com /pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:1907660089219 (1769 words)

	extent - a Whatis.com definition
		1) An extent is a set of contiguous blocks allocated in a database.
		The total number of extents that can be allocated in a database is limited by the amount of storage space available, or in some cases, by the program used.
		2) The term extent is sometimes used in reference to any contiguous space (for example, a set of sectors) on a hard drive that is reserved for a particular file, folder, or application.
	whatis.techtarget.com /gDefinition/0,294236,sid44_gci913383,00.html (176 words)

	Measurement of the Extent of Testing
		Let me suggest that a measure is "hard" to the extent that we can describe and experimentally investigate a mechanism that underlies the relationship between an attribute and its measure and that accurately predicts the rate of change in one variable as a function of the other.
		Extent to which tests of the important lines, branches, paths, conditions (etc.–important in the eyes of the tester) cover the total population of lines, branches, etc.
		Extent to which the scenario tests cover the important lines, branches, paths, conditions, or other variables of interest.
	www.kaner.com /pnsqc.html (11269 words)

	AskTom "blocks per extent" (Site not responding. Last check: 2007-10-23)
		Take the extent size and divide by block size and you have the number of blocks per extent.
		You would take the resulting size of the extent and divide by block size to determine how many blocks - but you have no control over how many blocks - you would using uniform sized extents if you wanted that control.
		The system allocated extents let it "grow" But that is the downside of system allocated extents as well - you do not know what the NEXT extent is going to be...
	asktom.oracle.com /pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:53893864660069 (452 words)

	XEmacs Lisp Reference Manual - Extent Endpoints (Site not responding. Last check: 2007-10-23)
		Both endpoints can be equal, in which case the extent includes no characters but still exists in the buffer or string.
		Zero-length extents are used to represent annotations (see section Annotations) and can be used as a more powerful form of a marker.
		Extents are ordered within a buffer or string by increasing start position, and then by decreasing end position (this is called the display order).
	www.tau.ac.il /cc/pages/docs/xemacs/lispref_557.html (337 words)

	Managing Extent Allocations and Free Space (SQL Server Architecture (SQL Server)) (Site not responding. Last check: 2007-10-23)
		If the bit is 1, the extent is being used as a mixed extent and has free pages; if the bit is 0, the extent is not used as a mixed extent, or it is a mixed extent whose pages are all in use.
		To free an extent, SQL Server ensures the GAM bit is set to 1 and the SGAM bit is set to 0.
		After an extent has been allocated to an object, SQL Server uses the PFS pages to record which pages in the extent are allocated or free, and how much free space is available for use.
	msdn.microsoft.com /library/en-us/architec/8_ar_da2_4lgl.asp?frame=true (630 words)

	POET Java Binding API Reference - Class COM.POET.odmg.Extent (Site not responding. Last check: 2007-10-23)
		The extent of a class is the set of all instances of the class within a particular database.
		Returns the transaction to which this extent is assigned.
		Moves the cursor to the previous element of the extent.
	www.sims.berkeley.edu /~mikechen/poet/COM.POET.odmg.Extent.html (547 words)

	Tablespace Extent and Prefetch size calculation for RAID arrays - dBforums
		For a RAID array of 3+p drive and stripe size of 64K, what is a good starting point for extent and prefetch size for a tablespace defined on six logical database partitions with one cotainer on each database partition.
		According to a redbook, "a good starting point would be to set extent size equal to 1 complete stripe of disks in the LUN and for the prefetch size, it must be a multiple of the extent size times the number of arrays underlying your table space.
		As far as I understand, extent size should be strip size and prefetch size should be the number of containers * stripe size.
	www.dbforums.com /t982359.html (436 words)

	Arc2D.Double (Java 2 Platform SE 5.0)
		The angular extent of the arc in degrees.
		- The angular extent of the arc in degrees.
		A double value that represents the angular extent of the arc in degrees.
	java.sun.com /j2se/1.5.0/docs/api/java/awt/geom/Arc2D.Double.html (977 words)

	Extent Information
		A fixed extent size may be inadvertently cleared when the reservation is changed.
		These applications can set a fixed extent size, so that all new extents allocated to the file are of the fixed extent size.
		When all extents of the required size have been used, attempts to allocate new extents fail: this failure can happen even though there are blocks free in smaller extents.
	docs.hp.com /en/5971-4772/ch04s03.html (1200 words)

	How the Extent of DCIS Affects Treatment Options
		Before a decision can be made about whether you can have breast-conserving or breast-removing treatment, your doctor has to put together a picture of what this particular cancer looks like and how it is likely to behave.
		Careful testing is important to define the extent of the disease before surgery.
		The extent of DCIS is also determined by the size, which is usually given in the pathology report.
	www.breastcancer.org /dcis_extent_affects.html (1138 words)

	CLHS: Issue EXIT-EXTENT Writeup
		The extent of an exit is dynamic; it is not indefinite.
		The extent of an exit is not the same thing as the scope of the
		The extent of an object with dynamic extent is the extent of the form
	www.lisp.org /HyperSpec/Issues/iss152-writeup.html (1629 words)

	extent. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
		The range, magnitude, or distance over which a thing extends: landowners unaware of the extent of their own holdings.
		The degree to which a thing extends: prosecuted to the fullest extent of the law.
		Middle English extente, assessment on land, from Anglo-Norman, from feminine past participle of extendre, to extend, from Latin extendere.
	www.bartleby.com /61/59/E0295900.html (174 words)

	CARES - Projects - Completed - River Flood Extent Manual
		A river flood extent manual showing flood extents, PWSs, and other geographic features is needed to better equip field staff in the Public Drinking Water Program (PDWP), Missouri Department of Natural Resources (MDNR), for future flood events.
		The information shown on the maps included the 1993 flood extent, the 100- and 500-year floodplains, rivers, lakes, stream networks, levees, highways, roads, railroads, public wells, surface water networks, entry points, contamination sites, pesticide dealerships, stream networks, incorporated areas, unincorporated towns and state and county boundaries.
		A River Flood Extent Manual consisting of 124 maps at scale 1:60,000 and 76 inset maps at scale 1:30,000 were generated in both digital and hardcopy formats.
	www.cares.missouri.edu /projects/completed/FM.html (360 words)

	Wetlands extent, structure and hydrology (Site not responding. Last check: 2007-10-23)
		Wetlands are usually classified on the basis of their morphology and vegetation and, to a lesser extent, their hydrology.
		The areal extent, distribution, and surface and internal structures of a wetland can be altered by many processes, such as organic and inorganic sediment deposition and erosion, paludification (lateral spread), terrestrialization (colonization of open water by wetland plant communities), and changing hydrology.
		This is particularly important in sparsely inhabited areas, such as coastal swamps where changes in storm surges and currents can cause severe damage within a single season, and permafrost terrains where melting may destroy coastal tundra landforms or flood peatlands, leading to their collapse.
	www.gcrio.org /geo/wetlands.html (1273 words)

	Extent - RADIUS, Billing, Prepaid for VoIP, Public WLAN, Hot Spot, ISP
		Extent RADIUS and Billing Sottware makes billing, prepaid, RADIUS Server, payment, and calling card software for Mobile carriers, Public Wireless LAN, VoIP, Telephony providers, ISP, Hotels, Internet Cafes, WISP and Hotspot operators.
		Our flagship product — Extent RBS is a back-office billing and AAA solution that is used by service providers in more then 50 countries since 1997.
		It is powering 1st tier providers as well as startups with tight budgets, that started with us six years ago, and grew with us since.
	www.extent.com (186 words)

	CLHS: Issue MACRO-ENVIRONMENT-EXTENT Writeup (Site not responding. Last check: 2007-10-23)
		outside the dynamic extent of the macro function.
		extent for macro environments is broken and needs to be fixed.
		Thus I believe in dynamic extent for environments.
	www-2.cs.cmu.edu /Groups/AI/util/html/hyperspec/HyperSpec/Issues/iss229-writeup.html (991 words)

	Extent (NextApp . Echo2 . API Specification)
		Returns the value of the extent in millimeters.
		Returns the value of the extent in points.
		Returns a string describing the state of the Extent.
	www.nextapp.com /platform/echo2/echo/doc/api/public/app/nextapp/echo2/app/Extent.html (325 words)

	Maximum Melt Extent on Greenland Ice Sheet, 2005
		total melt extent of the ice sheet, experiencing at least 1 melt day between April 1 - September 25 shows a record extent in 2005 for the 27-year long time PM data set.
		The 3-D view of Greenland melt extent shows the total melt area for 2005 and highlights the regions that never melted in the previous 26-year long PM record.
		The melt extent for 1992 (minimum extent) and for 2005 (maximum extent) are displayed in the same
	cires.colorado.edu /science/groups/steffen/greenland/melt2005 (573 words)

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