Welcome to KMR#

This is KMR, a high-performance map-reduce library. KMR-1.0 is available on the K Computer in "/opt/aics/kmr" now (2013-04-26). KMR works on ordinary clusters as well.

KMR is a set of high-performance map-reduce operations in the MPI (Message Passing Interface) environment. It makes programming for data-processing much easier by hiding low-level details of message passing. Its main target is large-scale computers with thousands of nodes, K and Fujitsu FX10. On these platforms, KMR provides utilities other than the map-reduce operations which addresses issues such as accessing very large file-systems.

KMR assumes large amount of memory and designed to work on-memory, whereas most map-reduce implementations are designed to work with external (disk-based) operations. So, data exchanges in KMR occur as message passing instead of remote file operations. The KMR routines work in bulk-synchronous and the most part of the code is sequential, but the code inside the mapper and reducer are multi-threaded.

Documents#

Issue Tracker#

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DISCLAIMER#

KMR comes with ABSOLUTELY NO WARRANTY. This wiki also comes with ABSOLUTELY NO WARRANTY. Contents are liable to change.


Acknowledgment#

KMR is a product of RIKEN AICS. Part of the results is obtained by using K Computer at RIKEN AICS.



Are you lost?, for wiki on mt65 try: https://mt65.aics.riken.jp/wiki/