<div dir="ltr"><div>Hi folk, we are using 10gb NICs with multithreaded compression.</div><div><br></div><div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial">We're finding that the standard `virsh migrate` gets at most ~1.2gbps, similar to a single scp session.</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial">When we do a multipart upload with multiple scp connections we can squeeze as high as 9.6gbps.</div></div><div><br></div><div>Is there was a way to get `virsh migrate` to perform multiple connections as well when transferring?<br></div><div><br></div><div>Would be useful to be able to migrate big guests using the full capacity of the 10gb nics.</div><div><br></div><div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial">Our example command to migrate:</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><br></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><div># virsh migrate --compressed --comp-methods mt --comp-mt-level 9 --comp-mt-threads 16 --comp-mt-dthreads 16 --verbose --live --copy-storage-all --undefinesource --unsafe --persistent <a href="http://dev-testvm790.mydomain.net">dev-testvm790.mydomain.net</a> qemu+tcp://<a href="http://myhost-10g.mydomain.net/system">myhost-10g.mydomain.net/system</a></div></div><br></div><div><br></div></div>