HTCondorWiki: How To Reserve Slot For Special Jobs

 {code}
 #Advertise that this machine is for "Pickle" jobs
 IsPickleSlot = True
-STARTD_EXPRS = $(STARTD_EXPRS) IsPickleSlot
+STARTD_ATTRS = $(STARTD_ATTRS) IsPickleSlot
 
 # this machine only runs "Pickle" jobs
 START = ($(START)) && (MY.IsPickleSlot =!= True || TARGET.IsPickleJob =?= True)
@@ -25,3 +25,28 @@
 SLOT1_IsPickleSlot = True
 SLOT2_IsPickleSlot = False
 {endcode}
+
+*Alternate STARTD configuration for HTCondor 8.2 or later*
+
+In HTCondor 8.2 or later, a different START expression can be set for each slot type. Use the same submit file statements as the above, but change the STARTD condifig to this:
+
+{code}
+# create two types of slots, normal and pickle
+NUM_SLOTS_TYPE_2 = 2
+NUM_SLOTS_TYPE_1 = $(NUM_CPUS) - $(NUM_SLOTS_TYPE_2)
+
+# type 2 slots only run pickle jobs.
+SLOT_TYPE_2_START = $(START:True) && (TARGET.IsPickleJob =?= True)
+
+#Advertise type 2 slots for "Pickle" jobs
+STARTD_ATTRS = $(STARTD_ATTRS) IsPickleSlot
+IsPickleSlot = SlotTypeId==2
+{endcode}
+
+Starting with HTCondor 8.3.8, attributes can also be advertised per-slot type, so this example could be simplified even further on 8.3.8 by replacing the last 3 statements in the above config block to this:
+
+{code}
+#Advertise type 2 slots for "Pickle" jobs using 8.3.8 features
+STARTD_ATTRS = $(STARTD_ATTRS) IsPickleSlot
+SLOT_TYPE_2_IsPickleSlot = true
+{endcode}