Tuning HDF5 performance

(30 minutes, Elena Pourmal)

In this talk we will examine how to tune HDF5 performance to improve I/O speed. The talk will focus on chunk and metadata caches, how they affect performance, and which HDF5 APIs that can be used for performance tuning.

Examples of different chunking strategies will be given. We will also discuss how to reduce file overhead by using special properties of the HDF5 groups, datasets and datatypes.

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