Linux, Ramdisk.
sh-4.2# modprobe zram sh-4.2# echo 10G > /sys/block/zram0/disksize sh-4.2# mkfs.xfs /dev/zram0 meta-data=/dev/zram0 isize=256 agcount=4, agsize=655360 blks = sectsz=4096 attr=2, projid32bit=1 = crc=0 finobt=0, sparse=0 data = bsize=4096 blocks=2621440, imaxpct=25 = sunit=0 swidth=0 blks naming