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Redirector xrootd proxy mgr Redirector xrootd proxy mgr Xrd proxy data server N2N Xrd proxy data server N2N Global Redirector Client Backend Xrootd storage.

Published byRobyn Powers Modified over 8 years ago

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Presentation on theme: "Redirector xrootd proxy mgr Redirector xrootd proxy mgr Xrd proxy data server N2N Xrd proxy data server N2N Global Redirector Client Backend Xrootd storage."— Presentation transcript:

1 Redirector xrootd proxy mgr Redirector xrootd proxy mgr Xrd proxy data server N2N Xrd proxy data server N2N Global Redirector Client Backend Xrootd storage Backend Xrootd storage 0. Join the Federation 1. Open (GFN) 2. Open (GFN) 3. Open/Read (GFN) 4. Read (PFN)Fetched data data Export Xrootd storage via Xrootd Proxy cluster GFN: global file name PFN: physical (storage) file name N2N: translation GFN to PFN cms.dfs directive: see cms.dfs : all data servers are equal http://www.xrootd.org/doc/prod/cms_config.htm#_Toc295744046

2 Redirector Xrootd mgr Redirector Xrootd mgr Regluar Xrd data server N2N Regular Xrd data server N2N Global Redirector Client Backend Posix storage Backend Posix storage 0. Join the Federation 1. Open (GFN) 2. Open (GFN) 3. Open/Read (GFN) 4. Read (PFN)Fetched data data Export Posix storage via regular Xrootd cluster GFN: global file name PFN: physical (storage) file name N2N: translation GFN to PFN Posix file system: GPFN, Luster, XrootdFS cms.dfs : all data servers are equal Posix File system

3 Redirector Xrootd mgr Redirector Xrootd mgr Regular Xrd data server with N2N Regular Xrd data server with N2N Global Redirector Client Backend dCache dCap doors Backend dCache dCap doors 0. Join the Federation 1. Open (GFN) 2. Open (GFN) 3. Open/Read (GFN) 4. Read (PFN)Fetched data data Export dCache dCap doors via regular Xrootd cluster GFN: global file name PFN: physical (storage) file name N2N: translation GFN to PFN dCap plugin: a Xrootd OFS plug-in moudel using dCap protocol cms.dfs : all data servers are equal dCap plug-in

4 Redirector xrootd proxy mgr Redirector xrootd proxy mgr Xrd proxy data server N2N Xrd proxy data server N2N Global Redirector Client Backend dCache Xrootd doors Backend dCache Xrootd doors 0. Join the Federation 1. Open (GFN) 2. Open (GFN) 3. Open/Read (GFN) 4. Read (PFN)Fetched data data Export dCache Xrootd doors via Xrootd Proxy cluster, 1 GFN: global file name PFN: physical (storage) file name N2N: translation GFN to PFN cms.dfs : all data servers are equal

5 Regular xrootd data server with Xrootd.redirect … Global Redirector Client 0. Join the Federation 1. Open (GFN) 2. Open (GFN) data Export dCache Xrootd doors via Xrootd Proxy cluster, 2 GFN: global file name PFN: physical (storage) file name N2N: translation GFN to PFN For Xrootd.redirect directive, see: dCache pool node with Auth plug-in for N2N dCache pool node with Auth plug-in for N2N dCache pool node with Auth plug-in for N2N dCache pool node with Auth plug-in for N2N dCache xrootd door Auth plug-in for N2N dCache xrootd door Auth plug-in for N2N 3. Open (GFN) 4. Open/Read (GFN) http://www.xrootd.org/doc/prod/xrd_config.htm#_Toc305602916

6 Redirector Xrootd mgr Redirector Xrootd mgr Global Redirector Client 0. Join the Federation 1. Open (GFN) 2. Open (GFN) 3. Open/Read (GFN) data Overlapping Xrootd cluster on top of dCache GFN: global file name PFN: physical (storage) file name N2N: translation GFN to PFN GFN name space : native xrootd name space layout according to GFN, with symlinks pointing to actual file on the same node (some CMS sites do this) dCache pool node Native Xrootd data server GFN name space (symlinks) or N2N dCache pool node Native Xrootd data server GFN name space (symlinks) or N2N

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