SCHEDULE: NOV 10-16, 2012
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PLFS/HDFS: HPC Applications on Cloud Storage
SESSION: Research Poster Reception
EVENT TYPE: Posters and Electronic Posters
TIME: 5:15PM - 7:00PM
SESSION CHAIR: Torsten Hoefler
AUTHOR(S):Chuck Cranor, Milo Polte, Garth Gibson
ROOM:East Entrance
ABSTRACT:
Long running large scale HPC applications protect themselves from
failures by periodically checkpointing their state to a single file
stored in a distributed network filesystem. These filesystems
commonly provide a POSIX-style interface for reading and writing
files. HDFS is a filesystem used in cloud computing by Apache Hadoop.
HDFS is optimized for Hadoop jobs that do not require full POSIX I/O
semantics. Only one process may write to an HDFS file, and all writes
are appends. Our work enables multiple HPC processes to checkpoint
their state into an HDFS file using PLFS. PLFS is a middleware
filesystem that converts random I/O into log-based I/O. We added a
new I/O store layer to PLFS that allows it to use non-POSIX
filesystems like HDFS as backing store. HPC applications can now
checkpoint to HDFS, allowing HPC and cloud to share the same storage
systems and work with each others data.
Chair/Author Details:
Torsten Hoefler (Chair) - ETH Zurich
Chuck Cranor - Carnegie Mellon University
Milo Polte - Carnegie Mellon University
Garth Gibson - Carnegie Mellon University
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