diff --git a/tilserv/dobackup b/tilserv/dobackup
new file mode 100755
index 0000000..f31e844
--- /dev/null
+++ b/tilserv/dobackup
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+#if [ -z $1 ]; then echo "Usage: $0 [target pool]"; exit 1; fi
+
+targetpool="bighdd/backup"
+incbackup="nvme/gitea@inc"
+newsnap="gitea@$(date +%Y%m%d)"
+latestsnap=$(zfs list -r -t snapshot -H -o name bighdd/backup/gitea | grep gitea@ | tail -n1)
+if [ "bighdd/backup/$newsnap" != "$latestsnap" ];  then
+	set -x
+	zfs snapshot -r nvme/$newsnap
+	zfs send -RI $incbackup nvme/$newsnap | zfs recv -Fu ${targetpool}/gitea
+	zfs destroy nvme/$newsnap
+	set +x
+else
+	echo "Backup ($targetpool) already contains snapshot $backupsnap"
+fi