Integrate LZ4 library, compress the ramdisk

lz4/tests/test-lz4-fast-hugefile.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+FPREFIX="tmp-lfh"
+
+set -e
+
+remove () {
+    rm $FPREFIX*
+}
+
+trap remove EXIT
+
+set -x
+
+datagen -g6GB    | lz4 -vB5 | lz4 -qt
+# test large file size [2-4] GB
+datagen -g3G -P100 | lz4 -vv | lz4 --decompress --force --sparse - ${FPREFIX}1
+ls -ls ${FPREFIX}1
+datagen -g3G -P100 | lz4 --quiet --content-size | lz4 --verbose --decompress --force --sparse - ${FPREFIX}2
+ls -ls ${FPREFIX}2
+diff -s ${FPREFIX}1 ${FPREFIX}2