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authorChristian Rebischke <Chris.Rebischke@posteo.de>2017-08-07 20:40:54 +0200
committerChristian Rebischke <Chris.Rebischke@posteo.de>2017-08-07 20:40:54 +0200
commit66a78afe5bdd04b7247239e3cd0772ef45a08f24 (patch)
tree645d9db6754bfd08a34b7e9c9b999c960a5a7720 /provision/write_zeroes.sh
parentc39cbfa32885b286e64f000f2ebbd768bf06f090 (diff)
downloadarch-boxes32-66a78afe5bdd04b7247239e3cd0772ef45a08f24.tar.xz
making the zero write optional
Diffstat (limited to 'provision/write_zeroes.sh')
-rw-r--r--provision/write_zeroes.sh10
1 files changed, 10 insertions, 0 deletions
diff --git a/provision/write_zeroes.sh b/provision/write_zeroes.sh
new file mode 100644
index 0000000..a7fac3e
--- /dev/null
+++ b/provision/write_zeroes.sh
@@ -0,0 +1,10 @@
+#/bin/bash
+
+set -e
+set -x
+
+# Write zeros to improve virtual disk compaction.
+zerofile=$(/usr/bin/mktemp /zerofile.XXXXX)
+dd if=/dev/zero of="$zerofile" bs=1M || true
+rm -f "$zerofile"
+sync