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DS8800 Performance Monitoring and Tuning
book

DS8800 Performance Monitoring and Tuning

by Gero Schmidt, Bertrand Dufrasne, Jana Jamsek, Peter Kimmel, Hiroaki Matsuno, Flavio Morais, Lindsay Oxenham, Antonio Rainero, Denis Senin
July 2012
Intermediate to advanced content levelIntermediate to advanced
726 pages
26h 28m
English
IBM Redbooks
Content preview from DS8800 Performance Monitoring and Tuning
342 DS8800 Performance Monitoring and Tuning
9.2.3 General Parallel File System (GPFS)
GPFS is a concurrent filesystem that can be shared among the nodes that compose a cluster
through a SAN or through a high-speed TCP/IP network. Beginning with Version 2.3, GPFS
does not require an LVM or a PowerHA cluster. You use it for sharing data among the servers
of a cluster concurrently without losing the facility to manipulate files that a standard
filesystem provides. It implements Direct I/O and filesystem caching among other features.
GPFS memory buffers
The pagepool sets the size of buffer cache on each node. For a database system, 100 MB
might be enough. For an application with many small files, you might need to increase this
setting to 2 GB - ...
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ISBN: 0738436836Purchase book