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![Page 1: Real Web Services](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681339d550346895d9ab129/html5/thumbnails/1.jpg)
Real Web ServicesJim Gray
Microsoft Research455 Market St, SF, CA, 94105
[email protected]://Research.Microsoft.com/~Gray
Talk atCharles Schwab Technology Summit, Friday, September 20, 2002
Slides at
http://Research.Microsoft.com/~Gray/talks
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Outline• TerraServer becomes a WebService
• Astronomy: Data Mining Web Services
• What possible relevance to you?
This is not the talk I promised: The World Wide Telescope:Archetype for Online Science but it is more relevant to you, and that talk is online
paper, slides, video
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TerraServerTerraServer.net
• A photo of the United States– 1 meter resolution (photographic/topographic)
– USGS data– Some demographic data (BestPlaces.net)
– Home sales data– Linked to Encarta Encyclopedia
• 15 TB raw, 6 TB cooked (grows 10GB/w)
• Point, Pan, zoom interface• Among top 1,000 websites
– 40k visitors/day– 4M queries/day– 1.2 B page views (in 3 years)
• All in an SQL database
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TerraServer Becomes a Web ServiceTerraServer.net -> TerraService.Net
• Web server is for people.• Web Service is for programs
– The end of screen scraping– No faking a URL:
pass real parameters.– No parsing the answer:
data formatted into your address space.
• Hundreds of users but a specific example:– US Department of Agriculture
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Vision: One Stop Shopping to Data Anywhere, Anytime, Anyplace
Business Applications Need Data
Customer Servi ce Toolk it Web Based Appli cati onPublic Acc ess to Servic eCenter Data
NASISNASISSoilsSoils
OrthoOrthoPhotosPhotos
CommonCommonLandLandUnitsUnits
•One stop Shopping•Site Loc ation•Data Selection•Data Extraction(cookiecutting) for vec tor, raster, andtabular•Component Arc hitecture
StrategicBusinessApplications
Data Marts&Warehouses
•Data Formatting includingreprojection and Mr. Sidcompression•Data Pac kaging•Data Delivery inc luding FTP,CD, and immediate dow nload•Public and Internal Security
Services
•Standards Enforc ement•Automated Retri val underprogram c ontrol•Compatibility w ith FGDCand Open GIS Standards•COTS or GOTS based•Print Map
State &State &CountyCounty
DataData
GISGISCriticalCriticalThemesThemes
APFO NCG APFO States NCG
ES RIArcV iew
And now.. 6 slides from the “customer”who built a portal using TerraService
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Data Gateway Functional Overview
Navigation Service
Catalog Service
Ship Service
<<Requests Products>>
Item Broker
Customer Orders Data
XML
Order Placer
Listen for OrderPlacer RaisedEventSelect sequenced ItemOutput XMLrasie event : stats.delivery start
validate (dtd)Insert into SQL@@Identity / GUID to clientreturn est timeraise OrderMgr.event
Order Database
Selects from
XML Request for dataLoggerCalled by anyonerasies to stats svc'
ASP
XMLXML
Soil Data Viewer
39.3
27.5
27.3
21.7
15.9
8.9
12.0
11.5
11.3
6.9
5.34.8
4.6
2.9
1.6
0.9
9 10B
10
12
33
14 18
29
5A
24
26
21
22
27
6A
25
17
20
11
28
19
16
31
9C
9A
13
13A
32
30
31A
22A28A
16A
30A
25A
LandunitsFields Within Buffer
Buffer Area Within Fields 5A 6A10B18202425262728293030A3131A32
Pipelines 97
2000 0 2000 4000 FeetN
Buffer Area Within Fields
USDA1:15840
NRCS
Geospatial Data
Acknowledges item ready for delivery
Data Services
Package Service
Send order info
FTP Services
Rimage CD Service
Product Catalog Updates
Billing Services
NCGC - Fort Worth, Texas
ITC - Fort Collins, Colorado
TerraService
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Order ProcessLocate area Select your products
Select data formats Identify shipping information Lighthouse returns confirmation
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Custom End ProductWeb Soil Data Viewer XML Soil ReportSoil Interpretation Map
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Web Soil Viewer
Web Server - Internet Information Services
Navigator.HTML
Client - Internet Explorer
WebSDVArcIMS Connector
GetSSAs.ASP
Provides an interface for user navigation within the U.S.
Retrieves the Soil Survey Areas for the requested extent and checks if they exist in the NASIS database
Connects to ArcIMS; communication is done through ArcIMS XML (AXL)
Retrieves and processes Soils Data from the NASIS relational Database
Map Navigator
An HTML Component providing visual navigation within the U.S.
SoilDataViewer.ASP
Provides an interface for users to request Soils Data for the selected extent
Image RetrieverIMSNavigator
Generates maps (JPGs) using ArcIMS
Retrieves imagery from the Microsoft TerraServer
NavigationStreamXML.ASP
Streams XML data to the IMS Navigator
ProcessData.ASP
Processes Soils Data Requests, returning both tabulature (XML report) and spatial (map image) data
Web Server - COM+ Applications
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ESRISpatial Data Engine
WebSDVArcIMS Connector
Connects to ArcIMS; communication is done through ArcIMS XML (AXL)
Retrieves and processes Soils Data from the NASIS relational Database
Image RetrieverIMSNavigator
Generates maps (JPGs) using ArcIMS
Retrieves imagery from the Microsoft TerraServer
Terraserver
GeospatialData
BusinessRules
National SoilsData
Database Server - Microsoft SQL Server
Database Server - ESRI Spatial Data Server
Web Server - COM+ Applications
Microsoft Terraserver
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Outline• TerraServer becomes a WebService
• Astronomy: Data Mining Web Services
• What possible relevance to you?
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SkyServerSkyServer.SDSS.org
• Like the TerraServer, but looking the other way: a picture of ¼ of the universe
• Pixels +Data Mining
• Astronomers get about 400 attributes for each “object”
• Get Spectrograms for 1% of the objects
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Why Astronomy Data?• There is lots of it
– High dimensional– Spatial– temporal
• Great sandbox for data mining algorithms– Can share cross company– University researchers
• Great way to teach both Astronomy and Computational Science
• Want to federate many instruments
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Why Astronomy Data?•It has no commercial value
–No privacy concerns–Can freely share results with others–Great for experimenting with algorithms
•It is real and well documented–High-dimensional data (with confidence intervals)–Spatial data–Temporal data
•Many different instruments from many different places and many different times•Federation is a goal•The questions are interesting
–How did the universe form?
•There is a lot of it (petabytes)
IRAS 100
ROSAT ~keV
DSS Optical
2MASS 2
IRAS 25
NVSS 20cm
WENSS 92cm
GB 6cm
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Virtual Observatoryhttp://www.astro.caltech.edu/nvoconf/
http://www.voforum.org/
• Premise: Most data is (or could be online)• So, the Internet is the world’s best telescope:
– It has data on every part of the sky– In every measured spectral band: optical, x-ray, radio..
– As deep as the best instruments (2 years ago).– It is up when you are up.
The “seeing” is always great (no working at night, no clouds no moons no..).
– It’s a smart telescope: links objects and data to literature on them.
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Federation
Data Federations of Web Services• Massive datasets live near their owners:
– Near the instrument’s software pipeline– Near the applications– Near data knowledge and curation– Super Computer centers become Super Data Centers
• Each Archive publishes a web service– Schema: documents the data– Methods on objects (queries)
• Scientists get “personalized” extracts
• Uniform access to multiple Archives– A common global schema
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Grid and Web Services Synergy• I believe the Grid will be many web services
share data (computrons are free)
• IETF standards Provide – Naming– Authorization / Security / Privacy– Distributed Objects
Discovery, Definition, Invocation, Object Model
– Higher level services: workflow, transactions, DB,..
• Synergy: commercial Internet & Grid tools
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Time and Spectral DimensionsThe Multiwavelength Crab Nebulae
X-ray, optical,
infrared, and radio
views of the nearby Crab
Nebula, which is now in a state of
chaotic expansion after a supernova
explosion first sighted in 1054 A.D. by Chinese Astronomers.Slide courtesy of Robert Brunner @ CalTech.
Crab star 1053 AD
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Web Services: The Key?• Web SERVER:
– Given a url + parameters – Returns a web page (often dynamic)
• Web SERVICE:– Given a XML document (soap msg)– Returns an XML document– Tools make this look like an RPC.
• F(x,y,z) returns (u, v, w)
– Distributed objects for the web.– + naming, discovery, security,..
• Internet-scale distributed computing
Yourprogram
DataIn your address
space
Web Service
soap
object
in
xml
Yourprogram Web
Server
http
Web
page
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Virtual Observatory Challenges• Size : multi-Petabyte
40,000 square degrees is 2 Trillion pixels– One band (at 1 sq arcsec) 4 Terabytes– Multi-wavelength 10-100 Terabytes– Time dimension >> 10 Petabytes– Need auto parallelism tools
• Unsolved MetaData problem– Hard to publish data & programs– How to federate Archives– Hard to find/understand data & programs
• Current tools inadequate– new analysis & visualization tools– Data Federation is problematic
• Transition to the new astronomy– Sociological issues
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SkyQuery: a prototype• Defining Astronomy Objects and Methods.• Federated 3 Web Services (fermilab/sdss, jhu/first, Cal Tech/dposs)
multi-survey cross-matchDistributed query optimization (T. Malik, T. Budavari, Alex Szalay @
JHU)
http://skyquery.net/• My first web service (cutout + annotated SDSS images) online
– http://SkyService.jhu.pha.edu/SdssCutout
• WWT is a great Web Services (.Net) application– Federating heterogeneous data sources.– Cooperating organizations– An Information At Your Fingertips challenge.
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SkyNode Basic Web Services• Metadata information about resources
– Waveband– Sky coverage– Translation of names to universal dictionary (UCD)
• Simple search patterns on the resources– Cone Search– Image mosaic– Unit conversions
• Simple filtering, counting, histogramming• On-the-fly recalibrations
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Portals: Higher Level Services• Built on Atomic Services• Perform more complex tasks• Examples
– Automated resource discovery– Cross-identifications– Photometric redshifts– Outlier detections– Visualization facilities
• Goal:– Build custom portals in days from existing building blocks
(like today in IRAF or IDL)
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SkyQuery (http://skyquery.net/)
• Distributed Query tool using a set of services• Feasibility study, built in 6 weeks from scratch
– Tanu Malik (JHU CS grad student) – Tamas Budavari (JHU astro postdoc)
• Implemented in C# and .NET• Allows queries like:
SELECT o.objId, o.r, o.type, t.objId FROM SDSS:PhotoPrimary o,
TWOMASS:PhotoPrimary t WHERE XMATCH(o,t)<3.5
AND AREA(181.3,-0.76,6.5) AND o.type=3 and (o.I - t.m_j)>2
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ArchitectureArchitectureImage cutout
SkyNodeSDSS
SkyNode2Mass
SkyNodeFirst
SkyQueryWeb Page
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Summary So Far
• Some real web services deployed today• Easy to build & deploy• Services publish data, Portals unify it• Tools really work!• I’m using C# and foundation classes of
VisualStudio.Net, a great! Tool• A nice book explaining the ideas:
(.Net Framework Essentials, Thai, Lam isbn 0-596-00302-1)
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Outline• TerraServer becomes a WebService
• Astronomy: Data Mining Web Services
• What possible relevance to you?
![Page 28: Real Web Services](https://reader036.fdocuments.net/reader036/viewer/2022062517/5681339d550346895d9ab129/html5/thumbnails/28.jpg)
Possible Relevance to You
• This web service stuff is REAL
• It is a way to publish data:InternetIntranet
• It is a way to find datano more screen scraping/parsingdata comes with schema
• Business model unclear– Your ideas go here.