網(wǎng)格信息服務(wù)的應(yīng)用需求(編輯修改稿)
2024-11-14 19:20 本頁面
【文章內(nèi)容簡介】 and B Resource A gramreporter Resource B gramreporter gramreporters periodically update LDAP server’s information. Client 1 Client 2 Client 3 clients query anization server for current information. “Standard” MDS Architecture (MDS2) ? Resources run a standard information service (GRIS) which speaks LDAP and provides information about the resource (no searching). ? GIIS provides a “caching” service much like a web search engine. Resources register with GIIS and GIIS pulls information from them when requested by a client and the cache as expired. ? GIIS provides the collectivelevel indexing/searching function. GIIS Cache contains info from A and B Resource A GRIS GIIS requests information from GRIS services as needed. Client 1 Client 2 Client 3 Resource B GRIS Clients 1 and 2 request info directly from resources. Client 3 uses GIIS for searching collective information. MDS2 Service Architecture ? Dynamic Registration via Reg. Protocol (GRRP) ? Resource Inquiry via Info. Protocol (GRIP) ? Colocated with resource on work ? Resource Discovery (via GRIP or other) ? Using GRIP allows resource/directory hierarchy discovery (GRIP?) lookup (GRIP) registration (GRRP) VOspecific Aggregate Directories standard Resource Description services R R R R A A ? Distributed Services ? Service scales with Grid growth ? Loose consistency model tolerates failures ? Interoperability by GRIP/GRRP protocols R R R R R R R R faultpartition registration messages replicated directories divergent directories R R R R R R R R R VOA VOB R R R R R R R R R R R R R R R R R D D D D Softstate Registration ?Periodic notification ?Service/resource is available ?Granularity metadata ?Automatic extension ?Add new resources to directories ?Invite resource to join new directory ?Selfcleaning ?Reduce occurrence of “dead” references Globus Overview ? Metaputing Directory Service, MDS ? MDS是 Globus項目中的信息服務(wù) ? 主要工作：對網(wǎng)格計算環(huán)境中信息的發(fā)現(xiàn)，注冊，查詢，修改等。提供對網(wǎng)格計算環(huán)境的一個真實，實時的動態(tài)反映 ? 處理的信息：網(wǎng)格計算環(huán)境中的各種資源（包括數(shù)據(jù)資源，計算資源等），服務(wù)和其它主體 entity的描述 ? 作為信息基礎(chǔ)設(shè)施的一部分， MDS采用動態(tài)可擴(kuò)展的框架來管理網(wǎng)格計算環(huán)境中各種資源（計算，網(wǎng)絡(luò)，存儲，儀器等）的靜態(tài)和動態(tài)信息 ? MDS的基本特征：數(shù)據(jù)生成，數(shù)據(jù)分布，數(shù)據(jù)存儲，數(shù)據(jù)搜索，數(shù)據(jù)查詢和數(shù)據(jù)顯示等 ? 目前 MDS可提供如下服務(wù)信息 ? 網(wǎng)格環(huán)境中存在的資源 ? 網(wǎng)格計算環(huán)境的狀態(tài)信息 ? 基于當(dāng)前的網(wǎng)格計算環(huán)境的網(wǎng)格應(yīng)用的優(yōu)化信息 MDS的實現(xiàn) ?MDS使用 LDAP （ Lightweight Directory Access Protocol）作為網(wǎng)格信息訪問與存儲的統(tǒng)一界面 ?MDS提供了一個可配置的信息提供者組件，稱為GRIS（ Grid Reso
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號-1