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diff --git a/docs/how_to_implement_hammer_pseudo_file_system__40___pfs___41___slave_mirroring_from_pfs_master/index.mdwn b/docs/how_to_implement_hammer_pseudo_file_system__40___pfs___41___slave_mirroring_from_pfs_master/index.mdwn
index 308a039..63381b0 100644 (file)
--- a/docs/how_to_implement_hammer_pseudo_file_system__40___pfs___41___slave_mirroring_from_pfs_master/index.mdwn
+++ b/docs/how_to_implement_hammer_pseudo_file_system__40___pfs___41___slave_mirroring_from_pfs_master/index.mdwn
@@ -87,3 +87,36 @@ We do the "sync" so that the file creation operation in flushed from the kernel
 
     # ls /Backup2/test/
     test-file
+
+#Enabling continuous mirroring.
+
+You can enable continuous mirroring by editing a few files.
+One way to make sure the mirroring works continously is to use the 'lockf' utility.
+This is one way to do it.
+
+    # mkdir /root/adm && cd /root/adm
+    # touch .lockfile
+
+Now make two scripts 'hms' and 'hmc' with the following contents inside /root/adm
+
+    # cat hms
+    hammer mirror-stream /Backup1/test /Backup2/test &
+
+    # cat hmc
+    hammer synctid /Backup1/test
+    hammer mirror-copy /Backup1/test /Backup2/test 
+
+Edit '/etc/rc.local and add the following line.
+
+    (cd /root/adm; /usr/bin/lockf -k -t 0 .lockfile ./hms) &
+
+Edit 'crontab' and add the following Lines.
+
+    #Check and restart mirroring if needed every 10 minutes
+    10 1 * * * (cd /root/adm; /usr/bin/lockf -k -t 0 .lockfile ./hms) &
+
+Edit '/etc/rc.shutdown.local' and add the following lines.
+
+    pkill -f /usr/bin/lockf -k -t 0 .lockfile ./hms
+    pkill -f hammer mirror-stream /Backup1/test /Backup2/test
+    (cd /root/adm; /usr/bin/lockf -k -t 10 .lockfile ./hmc)