1 / 11

Cross-site data transfer on TeraGrid using GridFTP

Cross-site data transfer on TeraGrid using GridFTP. TeraGrid’06 Institute User Introduction to TeraGrid June 12 th 2006. by Krishna Muriki kmuriki@sdsc.edu SanDiego Supercomputer Center. TeraGrid: Integrating NSF Cyberinfrastructure. PSC. PU. UC/ANL. NCAR (mid-2006). IU. NCSA.

montana
Download Presentation

Cross-site data transfer on TeraGrid using GridFTP

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Cross-site data transfer on TeraGridusing GridFTP • TeraGrid’06 Institute • User Introduction to TeraGrid • June 12th 2006. • byKrishna Muriki • kmuriki@sdsc.edu • SanDiego Supercomputer Center

  2. TeraGrid: Integrating NSF Cyberinfrastructure PSC PU UC/ANL NCAR (mid-2006) IU NCSA ORNL TACC SDSC

  3. Data Transfer Performance • What impacts transfer rates? • Disk speed • Connectivity of disk to node • Node characteristics & load • Connectivity of node to WAN • For all networks • Bandwidth • Latency • Buffer Size • Protocol • Load • Encryption … node node 1 Gb/s switch 30 Gb/s WAN (TG Backbone) Multi Gb/s 30 Gb/s switch node

  4. GridFTP - Protocol • GridFTP is based on FTP (But not the same) • More suitable: • Optimized for high-bandwidth networks • Optimized for Wide-area networks • More secure: • Authenticated Data Channels. • GSI security on control & data channels. (diff login names) • More performance: • Multiple data channels for parallel file transfers. • Reusable data channels • Command pipelining.

  5. TeraGrid Transfer Environment • Dedicated Nodes for Data Transfer ( called gridftp server nodes ) • With direct access to disks and Network Backbone. • Transfer client & servers based on more efficient protocol. • GSI authentication and proxy certificates • provide authentication • enable secure transfers • Transfer requests can be integrated into job execution scripts • Moving input data to site(s) of job execution • Moving results to another file system, site, or archive

  6. GridFTP Servers • GridFTP server : • Not all systems (nodes) on TeraGrid machines are GridFTP servers. • Only few nodes are configured to be GridFTP servers. • Configured to utilize the full TG backbone bandwidth. • Shared servers : • Login node : tg-login1.<site>.teragrid.org is a GridFTP server. • But a shared resource with many tasks running on this node. • Dedicated servers : • Node name : tg-gridftp.<site>.teragrid.org is a GridFTP server. • This single name resolves to more than one node at each site. • All the nodes are dedicated file transfer resources.

  7. No client !!! • gridftp is not a command. • There is no client program with the name ‘gridftp’. • Recommended client programs: • tgcp • globus-url-copy • uberftp • Availability: • uberftp & globus-url-copy are part of CTSS*** • tgcp can be added through SoftENV. ( soft add +tgcp ).

  8. globus-url-copy • %> globus-url-copy <source-url> <destination-url> • Command line client (Not interactive) • No feedback given back. (suitable for use in job scripts) • Multiple data channels (striped ) • Third party transfers • Source & Destination formats: • If local file --- file:<full path> • If remote file --- gsiftp://<hostname>/<full path> • Optimization parameters: • -tcp-bs <size> | -tcp-buffer-size <size> ( size in bytes ) • -p <parallelism> | -parallel <parallelism>

  9. UberFTP • %> uberftp • Interactive file transfer client. • Not suitable for script transfers. • Less verbose syntax. • Less prone to errors. • Some useful commands: • put, get • mput, mget • Parallel, tcpbuf • Optimization parameters: • tg-login1> uberftpuberftp> parallel 2uberftp> tcpbuf 4194304TCP buffer set to 4194304 bytes

  10. tgcp • %> tgcp • Command line program • Wrapper around globus-url-copy, RFT & cp commands. • Syntax same as globus-url-copy or RFT • Automatically picks optimization parameters • Users need not set the parameters • Some Useful options: • -big or –stripe : To transfer large files using striped guc. • -rft : To transfer using Reliable File Transfer (RFT) service.

  11. Thanks

More Related