ADIOS2.jl
A Julia interface to ADIOS2, the Adaptable Input Output System version 2.
Examples
It is best to read the ADIOS2 documentation before using this package.
ADIOS2 splits reading/writing variables into three parts:
- Define the metadata, i.e. the name, type, and shape (if array) of the variables
- Schedule the reads/writes, providing pointers to or buffer for the data
- Perform the actual reads/writes
This ensures that reads or writes can be performed very efficiently.
Writing a file
# Initialize ADIOS
using ADIOS2
adios = adios_init_serial()
io = declare_io(adios, "IO")
engine = open(io, "example.bp", mode_write)
# Define some variables
scalar = 247.0
svar = define_variable(io, "scalar", scalar)
array = Float64[10i + j for i in 1:2, j in 1:3]
avar = define_variable(io, "array", array)
# Schedule writing the variables
put!(engine, svar, scalar)
put!(engine, avar, array)
# Write the variables
perform_puts!(engine)
close(engine)Reading a file
# Initialize ADIOS
using ADIOS2
adios = adios_init_serial()
io = declare_io(adios, "IO")
engine = open(io, "example.bp", mode_read)
# List all variables
vars = inquire_all_variables(io)
println("Variables:")
for var in vars
println(" ", name(var))
end
svar = inquire_variable(io, "scalar")
avar = inquire_variable(io, "array")
# Schedule reading the variables
scalar = Ref{Float64}()
get(engine, svar, scalar)
array = Array{Float64}(undef, 2, 3)
get(engine, avar, array)
# Read the variables
perform_gets(engine)
println("scalar: $(scalar[])")
println("array: $array")