[Rd] Pre-building lazyload DB

James MacDonald jmacdon at med.umich.edu
Tue Feb 8 17:29:08 CET 2005

Hi all,

Bioconductor has several metaData packages that contain quite large
data sets. In the past, these data were simply held in the /data
directory of the package as .rda files and load()ed as needed.
Converting to using lazy data loading may have memory and performance
advantages, but for the larger metaData packages the installation is
painfully slow (it has taken > 30 min to install a large metaData
package on a PIII, 933 MHz box running Mandrake 9.2). The vast majority
of the time is spent moving datasets to lazyload DB.

It takes a long time to build the win32 packages as well, but once the
package is built, the installation is quick, so there is no real problem
for our end users. So my question is this; is there a mechanism that can
be used to pre-build the lazyload DB for source packages to decrease the
installation time for our end users?



James W. MacDonald
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109

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