bigmemory (version 4.4.6)

flush: Updating a big.matrix filebacking.

Description

For a file-backed big.matrix object, flush() forces any modified information to be written to the file-backing.

Usage

flush(con)

Arguments

con

a filebacked big.matrix.

Value

• TRUE or FALSE (invisible), indicating whether or not the flush was successful.

Details

This function flushes any modified data (in RAM) of a file-backed big.matrix to disk. This may be useful for improving performance in cases where allowing the operating system to decide on flushing creates a bottleneck (likely near the threshold of available RAM).

Examples

x <- big.matrix(nrow=3, ncol=3, backingfile='flushtest.bin',
  descriptorfile='flushtest.desc', type='integer')
x[1,1] <- 0
flush(x)