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Produced under contract DE-AC03-76SF00515 between Stanford ... Prevent catalog bloat, the largest impediment to scalability. Develop an SQL LDAP back-end? ...
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The Next Generation Root File Server Andrew Hanushevsky Stanford Linear Accelerator Center 27-September-2004 http://xrootd.slac.stanford.edu What is xrootd?
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Countries monitored. Contain 78% of world population. 99% of online users of Internet ... nlanr.net/training/presentations/tcp-tutorial.ppt. www-didc.lbl.gov ...
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Internet End-to-end Monitoring Project at SLAC Les Cottrell, Connie Logg, Jerrod Williams, Gary Buhrmaster Site visit to SLAC by DoE program managers Thomas Ndousse ...
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ftp / scp / rsync (syncslac) are not optimised for bulk transfers over the WAN ... Nearing 10 Mbits/s Janet-ESnet peering. sfcp with 2 streams gives 600 kbits/s ...
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Electronic Logbook for the HEP Control Room (Philippe Canal/FNAL) ... (Pasha Murat/FNAL) 2 I/O SGI nodes (staging, NFS, control) ...
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Multi-protocol authentication support. Scalable authorization. Jauuary 13, 2003 ... Compatible Protocol. Allows transparent use of rootd & xrootd. Multi-Streaming ...
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D. Quarrie5, T. Adye6, A. Adesanya7, J-N. Albert4, J. Becla7, D. Brown5, C. Bulfon3, I. Gaponenko5, S. Gowdy5, A. ... New software release is a true superset ...
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Xrootd provides a Posix I/O interface. open(), close(), read(), write(), etc., in addition to ... Sync creation and deletion of shadow file and real data file ...
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Object ID server caching object IDs for conditions database ... Routine maintenance schema upgrade, back up, conditions transfers ...
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Certificate Validating the Issuer of Next Cert in Chain ... (authenticator is an MD5 hash of all exchanged handshake bytes) 2) Cert must not be expired. ...
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... System Issues: PCI-X Bus, Linux Kernel, NIC Drivers, CPU. Internet 2 Land Speed ... Linux kernel for TCP-based protocols, ... 7 full kernel-build cycles ...
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28 April 2003. Lee Lueking, PPDG Review. 1. BaBar and D Experiment Reports ... Second round of execution site deployments include Lyon (ccin2p3), Manchester, ...
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Same for Objy if we duplicate events in each stream ... Keep stream files in HPSS; use that for export ... on plans for skim & stream production and storage ...
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... custom 'streamer' ... Custom version based on. how object is stored in file. Implements ... in particularly need enough custom Java classes to read the ...
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Hierarchical directory-like name space of arbitrary files ... Firewalled and. Replicated for scaling. Preload. Library. GSI. FTP. xrootd. Firewall. Client ...
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... from 70 sites in 10 countries ... 1-2GHZ CPU's spread over 35 sites world-wide. Work is distributed across ... Proxy Implementation. Uses ...
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Efficient, secure and reliable transfer of data between sites. Data Replication ... functionality as edg-replica-manager but it is overkill and much harder to do. ...
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Fungible. Default. 10-November-08. Builtin Authorization Privileges ... Fungible user entry. Specific user entry. Entry for originating host ...
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Performance appears similar to NFS V3. Let's explore multiple ... Top Performers Table. Per User Views. ANL Tier3(g,w) Meeting 19-May-09. 19. User Information ...
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The Three Legged Stool. Scalable High Performance Data Access. Non-trivial task ... Servers may be dynamically added and removed. Flexible Security ...
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Scalable request/response protocol. Multi-threaded multi-process architecture ... Multi-protocol Authentication. Supports distributed heterogeneous environments ...
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China. India. Grid Computing Model. Grid Vision ... Proxy Delegation. Delegation = remote creation of a (second level) proxy credential ...
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The Multi-layer Condor System. Production Queue ... 4. Condor sends the job to the node where the input file stored. ... Use Condor/MySQL/PROOF/Xrootd ...
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The trick is to do so in a way that. Cluster overhead (human & non-human) scales linearly ... High performance and clustering are synergetic ...
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Babar working on Linux release for New Year. Runs close to capacity for significant periods. ... Start work shortly on new cheap Linux/IDE disk server for ...
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One of the arguably successful grid-like projects. Largely dealing with data management issues ... It seems that all projects are hedging their bet ...
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Can Scalla create a file system experience? The answer is ... Rapid file creation (e.g., tar) is limited. FUSE must be administratively installed to be used ...
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ATLAS WT2 UF 6-Apr-09. Why Not Just Use NFS? NFS V2 & V3 inadequate ... ATLAS WT2 UF 6-Apr-09. File Discovery Considerations I ...
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POSIX-style byte-level random access. By default, arbitrary data organized as files ... High efficiency data server (low CPU/byte overhead, small memory footprint) ...
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No config file needed for non-complicated/small installations. Generality ... Uses load balancing to effect recovery. New servers can be added at any time ...
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Attempted install on UltraLight dual core Opterons at Caltech, but no host ... Opteron systems with two CPUs each dual core, 8GB or 16GB RAM, s2io 10Gbit NICs, ...
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A new infrastructure for high throughput network and application performance measurement. Les Cottrell SLAC Prepared for the IPAM meeting, UCLA Mar 19 02
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www.slac.stanford.edu/grp/scs/net ... Evaluate, recommend, integrate best measurement probes including for =10Gbps ... Recommend trying pathneck on UltraLight ...
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BABAR Overview and Future Plans
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Global Lambdas and Grids for Particle Physics in the LHC Era
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... Ian Foster , Mike Wilde , Jenny Schopf , Willliam Alcock, Von ... Mandrechenko, Steve Chan, Steve Lau , Craig Tull, Matt Crawford, David Bianco, Hao Wang ...
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set apath = /var/adm/xrootd Where admin information can be stored (usually here) ... CacheLogLocation=/var/log # disableSpaceMgt must be true for BeStMan Gateway mode ...
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