fix(unitproc/bkt-replace_apos):Update comments

[BK-2020-03.git] / user / rsync_tranches.sh

#!/usr/bin/env bash
# Desc: A bash function for splitting up rsync jobs based on size

echo "ERROR:This is a bash function, not a script." 2>&1; exit 1;

function rsync_tranches() {
    # Desc: Runs rsync in parallel across different files size ranges
    # Example: rsync_tranches -avu --progress --dry-run ./SOURCE/ ./DEST/
    # Depends: rsync 3.2.7
    # Version: 0.0.2
    local -a rsync_opts=();
    local source dest;

    # Parse arguments until source and destination are found
    while [[ $# -gt 0 ]]; do
        case "$1" in
            # If it's not an option, assume it's the source, then the destination
            -*)
                rsync_opts+=("$1");
                shift;
                ;;
            *)
                if [ -z "$source" ]; then
                    source="$1";
                else
                    dest="$1";
                fi;
                shift;
                ;;
        esac;
    done;

    # Validate that source and destination are set
    if [[ -z "$source" ]] || [[ -z "$dest" ]]; then
        echo "Error: Source and destination directories must be specified." 1>&2;
        return 1;
    fi;

    # Tranche 1: 0 to 1MiB-1
    rsync --min-size='0' --max-size='1MiB-1' "${rsync_opts[@]}" "$source" "$dest" &

    # Tranche 2: 1MiB to 10MiB-1
    rsync --min-size='1MiB' --max-size='10MiB-1' "${rsync_opts[@]}" "$source" "$dest" &

    # Tranche 3: 10MiB to 100MiB-1
    rsync --min-size='10MiB' --max-size='100MiB-1' "${rsync_opts[@]}" "$source" "$dest" &

    # Tranche 4: Greater than 100MiB
    rsync --min-size='100MiB' --max-size='8192PiB-1' "${rsync_opts[@]}" "$source" "$dest" &

    wait # Wait for all rsync processes to complete
};
export -f rsync_tranches;

# Author: Steven Baltakatei Sandoval
# License: GPLv3+