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Diffstat (limited to 'gitlab/issues_text/target_missing/host_missing/accel_missing/719')
| -rw-r--r-- | gitlab/issues_text/target_missing/host_missing/accel_missing/719 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/719 b/gitlab/issues_text/target_missing/host_missing/accel_missing/719 new file mode 100644 index 000000000..66c48c6ae --- /dev/null +++ b/gitlab/issues_text/target_missing/host_missing/accel_missing/719 @@ -0,0 +1,19 @@ +live migration's performance with compression enabled is much worse than compression disabled +Description of problem: + +Steps to reproduce: +1. Run QEMU the Guests with 1Gpbs network on source host and destination host with QEMU command line +2. Run some memory work loads on Guest, for example, ./memtester 1G 1 +3. Set migration parameters in QEMU monitor. On source and destination, + execute: #migrate_set_capability compress on + Other compression parameters are all default. +4. Run migrate command, # migrate -d tcp:10.156.208.154:4000 +5. The results: + - without compression： total time: 197366 ms throughput: 937.81 mbps transferred Ram: 22593703 kbytes + - with compression: total time: 281711 ms throughput: 90.24 mbps transferred Ram: 3102898 kbytes + +When compression is enabled, the compression transferred ram is reduced a lot. But the throughput is down badly. +The total time of live migration with compression is longer than without compression. +I tried with 100G network bandwidth, it also has the same problem. +Additional information: + |