Japanese Virtual Observatory Project

1. User’s own service Registry OGSA-DAI OGSA-DAI OGSA-DAI Globus Toolkit V3 Globus Toolkit V3 Globus Toolkit V3 Services callable through Grid MVC Webブラウザ Web Browser MVC Astronomical Catalog Query Service Browser for JVO JVO Portal Catalog DB MVC Viewer for JVO Researcher Data Archive Service Globus Toolkit V2 Virtual Observation execution service UDDI server Data Data manage DB Globus Toolkit Service Registry Data Analysis service Three-Tiered Design of the JVO Prototype I Security mngmt Resource mngmt Data management JVO GRID Environment Other GRID Environment Other VO services Globus Toolkit Service Registry Security mngmt Resource mngmt Data management The first version of JVO prototype has been completed. The design of the JVO prototype is shown as a schematic diagram. We adopted to use the Globus Toolkit 2 for our prototype. However, we also take into account the Web Service concept which is included in the Globus Toolkit 3. Other Catalog services User DB server user data GT3 At the beginning, researchers provide the JVO with simple instructions how they plan to use their own ''Virtual Observation''. The JVO portal interprets them and generates a work flow through consulting the UDDI servers, where available JVO services are registered. Based on the work flow, built-in or user-defined services are called. The GRID framework is used for dynamical assignment of distributed resources according to their availabilities. Execution results of the work flow are transferred through GridFTP and presented to the researchers. Road Map Japanese Virtual Observatory Project Masatoshi OHISHI, Yoshihiko MIZUMOTO, Naoki YASUDA, Yuji SHIRASAKI, Masahiro TANAKA, Satoshi HONDA (NAOJ) and Yoshifumi MASUNAGA (Ochanomizu Univ. and NAOJ) in Collaboration with Fujitsu Ltd. Contact Address: adac@jvo.nao.ac.jp Abstract : The National Astronomical Observatory of Japan (NAOJ) started the Japanese Virtual Observatory (JVO) project since April 2002. JVO utilizes the Grid technology to combine several remotecomputational resources. We have defined the query language for the JVO to federate multiple astronomical databases and constructed a prototype of the JVO to confirm whether federated databases can be accessed through Grid technology. More information is available at: http://jvo.nao.ac.jp/ JVO Prototype Ver 1. Main Control Window Column attributes are displayed by pushing the “column_info” button, where you can also control the column layout. Open a JVO QL Editor Write JVO QL here or use an editor. The query result is shown up in a result page, which is a kind of VOTable viewer and provides an easy access to both the table and image data. For graphical viewing of the table data, plotting tool is available. You can specify any column or expression for X/Y axis. This example shows a demo doing a cross-matching search between the two databases SDF-i’ and SDF-z’. At first a search command is issued to the SDF-i’ database server, mizu-g, then the result is transferred to the SDF-z’ database server, minazuki-g, where cross-matching search is executed. Image requests are issued at the last two steps.The query results are transferred through GridFTP in a VOTable format for table data and in FITS for image data. The current JVO prototype can communicates with four distributed database, “Subaru Deep Field i’-band” (SDF-i’), SDF-z’, “Subaru XMM Deep Survey” (SXDS), and 2MASS. A main control window provides you to specify a query in JVO Query Language. You can save/load the QL in a file with the Export/Import button. A QL editor is opened by pushing the editor button and provides an easy way to specify search conditions. The JVO system splits the user input query into pieces of queries for each database, then issues search commands to appropriate servers through a “globus-job-submit” command of Globus Toolkit. Design for Prototype II We are designing the JVO prototype II, which is an extension of the prototype I and incorporates functions required in the practical system. Followings will be newly implemented or improved on the prototype II: 1. Adoption of Globus Toolkit 3 (OGSA), 2. User management, 3. Simple user interface for making a query, showing the result, and so on.., 4. Federation of the distributed DBs, 5. Integrated data analysis services. Data Base server 1 Data query services ORACLE Distributed Resource manager データベースサーバ２ GWSDL OGSA -DAI Image management DB Security Manager Data number count Gb Ether Gb Ether データ検索処理 PostgreSQL Resource Manager WSDL 2MASS User operation Window 画像管理 DB DAISGR データ数count Globus Tk Linux X match Portal Server SUBARU SupCam i-band Query request Portal servlet Federation of distributed DBs User management Registry search Analysis services Status display Query request Distributed processing control Linux Search criteria Window Analysis server Status monitor ・Search DAISGR ・Parse GWDSL ・Preparation, Execute ・Confirmation of results Analysis services Linux Data storage Status monitor Window Web Server Data base server N Globus Toolkit V3 Query Results Data query services PostgreSQL WSDL Image management DB Data number count Analysis request Make schedule II Make schedule I X match Results Window SUBARU SupCam z-band Globus Toolkit V3 Web Browser JVO-QL parse server Analysis services Windows, Solaris8, Linux Query request Solaris8 Solaris8 2001 2002 2003 2004 2005 2006 . JVO project start Development of Prototype I Development of Prototype II Development of Practical Systems Experimental service start