EXPORT_MODE_REMOTE,
])
-# lock recalculate mode
+# Lock recalculate mode
LOCKS_REPLACE = 'replace'
LOCKS_APPEND = 'append'
+# Lock timeout (sum) before we should go into blocking acquire (still
+# can be reset by priority change); computed as max time (10 hours)
+# before we should actually go into blocking acquire given that we
+# start from default priority level; in seconds
+LOCK_ATTEMPTS_TIMEOUT = 10 * 3600 / 20.0
+LOCK_ATTEMPTS_MAXWAIT = 15.0
+LOCK_ATTEMPTS_MINWAIT = 1.0
+
# instance creation modes
INSTANCE_CREATE = "create"
INSTANCE_IMPORT = "import"