parallel I/O

• z-order layout.
• I/O access competing with bandwidth(bulk favored)
• gather and access
• IDX parallel conversion
• region of interest based dumps
• performance prediction

Molecular simulation “Falcon” supercomputer

• MDS(molecular dynamics simulations) modeling
• initial position & velocity
• force of choice
• Emsembles

Compression based interactive in-situ visualization for large-scale simulation

Chongke Bi

Simulation: * initial * simulation * evaluation * adjust parameter * do it again or finish

Reserch: restart at any time * compression * visualization * in-situ

Result: Heterogeneously integrated visualization environment (HIVE) * parallel rendering * hardware independent * OS independent

Data Sharing method * Data sharing(code change) * Memory Sharing * Hard disk sharing

Parallel POD Compression Method * compression ratio * Proper orthogonal decomposition * parallelism * data loss

Visualization for supercomputing at TACC and Argonne

compute -> fileserver(really slow) -> visualization -> display

• in-core
• out-of-core
• data parallel
• in-situ - coprocessing(io forwarding)
• in-situ - true in-situ