+</listitem></varlistentry>
+ <!-- ==== -->
+ <varlistentry><term>NB_THREADS_BACKUP</term><listitem>
+(read-write) The number of thread that send data to the s3 device, higher value can provide more throutput.
+</listitem></varlistentry>
+ <!-- ==== -->
+ <varlistentry><term>NB_THREADS_RECOVERY</term><listitem>
+(read-write) The number of thread that read data from the s3 device, higher value can provide more throutput.