andromeda | R Documentation |
By default the Andromeda
object is created in the systems temporary file location. You can override
this by specifying a folder using options(andromedaTempFolder = "c:/andromedaTemp")
, where
"c:/andromedaTemp"
is the folder to create the Andromeda objects in.
Although in general Andromeda is well-behaved in terms of memory usage, it can consume a lot of
memory for specific operations such as sorting and aggregating. By default the memory usage is
limited to 75% of the physical memory. However it is possible to set another limit by using
options(andromedaMemoryLimit = 2.5)
, where 2.5
is the number of GB to use at most. One GB is
1,000,000,000 bytes.
andromeda(..., options = list())
... |
Named objects. See details for what objects are valid. If no objects are provided, an empty Andromeda is returned. |
options |
A named list of options. Currently the only supported option is 'threads' (see example). All other options are ignored. |
Valid objects are data frames, Andromeda
tables, or any other dplyr
table.
Returns an Andromeda
object.
andr <- andromeda(cars = cars, iris = iris)
names(andr)
# [1] 'cars' 'iris'
andr$cars %>% filter(speed > 10) %>% collect()
# # A tibble: 41 x 2
# speed dist
# <dbl> <dbl>
# 1 11 17
# ...
close(andr)
# Use multiple threads for queries
andr <- andromeda(cars = cars, iris = iris, options = list(threads = 8))
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