There are increasing requirements to add lower than/greater than compare operator for the PCC rules:

• File data that is larger than local disk capacity should not auto cache in PCC;
• A range of UID/GID/ProjID could be auto cached on PCC;

The following rule expressions are supported:

lctl pcc add /mnt/lustre /mnt/pcc -p "projid=\{100}&size>\{1M}&size<\{500G}"
lctl pcc add /mnt/lustre /mnt/pcc -p "projid>\{100}&projid<\{110}"
lctl pcc add /mnt/lustre /mnt/pcc -p "uid<\{1500}&uid>\{1000}"