@@ -4696,24 +4696,24 @@ SRST
tools such as tcpdump or Wireshark.
``-object colo-compare,id=id,primary_in=chardevid,secondary_in=chardevid,outdev=chardevid,iothread=id[,vnet_hdr_support][,notify_dev=id][,compare_timeout=@var{ms}][,expired_scan_cycle=@var{ms}][,max_queue_size=@var{size}]``
- Colo-compare gets packet from primary\_inchardevid and
- secondary\_inchardevid, than compare primary packet with
- secondary packet. If the packets are same, we will output
- primary packet to outdevchardevid, else we will notify
- colo-frame do checkpoint and send primary packet to
- outdevchardevid. In order to improve efficiency, we need to put
- the task of comparison in another thread. If it has the
- vnet\_hdr\_support flag, colo compare will send/recv packet with
- vnet\_hdr\_len. Then compare\_timeout=@var{ms} determines the
- maximum delay colo-compare wait for the packet.
- The expired\_scan\_cycle=@var{ms} to set the period of scanning
- expired primary node network packets. The max\_queue\_size=@var{size}
- is to set the max compare queue size depend on user environment.
- If you want to use Xen COLO, will need the notify\_dev to
+ Colo-compare gets packet from primary\_in chardevid and
+ secondary\_in, then compare whether the payload of primary packet
+ and secondary packet are the same. If same, it will output
+ primary packet to out\_dev, else it will notify COLO-framework to do
+ checkpoint and send primary packet to out\_dev. In order to
+ improve efficiency, we need to put the task of comparison in
+ another iothread. If it has the vnet\_hdr\_support flag,
+ colo compare will send/recv packet with vnet\_hdr\_len.
+ The compare\_timeout=@var{ms} determines the maximum time of the
+ colo-compare hold the packet. The expired\_scan\_cycle=@var{ms}
+ is to set the period of scanning expired primary node network packets.
+ The max\_queue\_size=@var{size} is to set the max compare queue
+ size depend on user environment.
+ If user want to use Xen COLO, need to add the notify\_dev to
notify Xen colo-frame to do checkpoint.
- we must use it with the help of filter-mirror and
- filter-redirector.
+ COLO-compare must be used with the help of filter-mirror,
+ filter-redirector and filter-rewriter.
::