diff options
Diffstat (limited to 'qemu-options.hx')
| -rw-r--r-- | qemu-options.hx | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index 310885c60e..65147ad971 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -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. :: |