#FALLBACK: 512K - 4K
default FALLBACK_SIZE=0x7f000
#FAILOVER: 4k
-default FAILOVER_SIZE=0x01000
+default FAILOVER_SIZE=0x02000
#more 1M for pgtbl
#if there is RAM on node0, we need to set it to 32M, otherwise can not access CAR on node0, and RAM on node1 at same time.