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#!/bin/sh
set -eux
DATABASE_NAME=guix_data_service
DEFAULT_BACKUP_DIRECTORY="/var/lib/guix-data-service/dumps"
BACKUP_DIRECTORY="${GUIX_DATA_SERVICE_BACKUP_DIRECTORY:-$DEFAULT_BACKUP_DIRECTORY}"
DATE="$(date "+%Y-%m-%d")"
FULL_BACKUP_NAME="guix_data_service_full.dump"
TEMPORARY_FILE_NAME="${TMPDIR:-/tmp}/guix_data_service_full-$DATE.dump.tmp"
DESTINATION_FILE_NAME="$BACKUP_DIRECTORY/$DATE/$FULL_BACKUP_NAME"
renice 19 -p $$
ionice -p $$ -c 3
pg_dump --format=custom --compress=9 --serializable-deferrable \
--username=guix_data_service \
--file="$TEMPORARY_FILE_NAME" \
"$DATABASE_NAME"
mkdir -p "$BACKUP_DIRECTORY/$DATE"
mv "$TEMPORARY_FILE_NAME" "$DESTINATION_FILE_NAME"
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