Add storage class option for AWS S3 to specify storage class to be used

duplicity-backup.conf.example

@@ -138,6 +138,16 @@ DEST="s3+http://foobar-backup-bucket/backup-folder/"
 #
 #AWS_ACCESS_KEY_ID="foobar_aws_key_id"
 #AWS_SECRET_ACCESS_KEY="foobar_aws_access_key"
+
+# ------------------------------------------------------------------------------
+# SET STORAGE CLASS for AWS
+# ------------------------------------------------------------------------------
+# The defaulct storage class is STANDARD STORAGE. You can comment this option if 
+# want to go with standard. The other storage options are --s3-use-ia and --s3-use-rrs.
+# Note: --s3-use-ia option is supported only in duplicity version greater than 0.7.06 
+
+#STORAGECLASS="--s3-use-ia"
+
 #
 # S3CMD INFORMATION
 # Most people don't need this, but in some cases

duplicity-backup.sh

@@ -566,6 +566,7 @@ duplicity_backup()
 {
   {
     eval ${ECHO} ${DUPLICITY} ${OPTION} ${VERBOSITY} ${STATIC_OPTIONS} \
+    ${STORAGECLASS} \
     ${ENCRYPT} \
     ${EXCLUDE} \
     ${INCLUDE} \