[pve-devel] [PATCH 3/3] add downtime && expected_downtime query-migrate info

[Stefan Priebe - Profihost AG]

Sure you mean just the output in the web GUI?

Stefan

Am 27.12.2012 um 10:29 schrieb Alexandre DERUMIER <aderumier at odiso.com>:

> Can you send a migration log ?
> 
> ----- Mail original ----- 
> 
> De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
> À: "Alexandre DERUMIER" <aderumier at odiso.com> 
> Cc: pve-devel at pve.proxmox.com 
> Envoyé: Jeudi 27 Décembre 2012 10:26:45 
> Objet: Re: [pve-devel] [PATCH 3/3] add downtime && expected_downtime query-migrate info 
> 
> Ok was just an idea. To me also 0.3 does not work but 0.03 works ;-( also limit bandwidth to 500mb does not help. 
> 
> Stefan 
> 
> Am 27.12.2012 um 10:09 schrieb Alexandre DERUMIER <aderumier at odiso.com>: 
> 
>> for me expected downtime is 0 until the end of the migration. 
>> 
>> here a sample log, using default 30ms downtime. 
>> 
>> Dec 27 07:24:06 starting migration of VM 99999 to node 'kvmtest2' (10.3.94.47) 
>> Dec 27 07:24:06 copying disk images 
>> Dec 27 07:24:06 starting VM 99999 on remote node 'kvmtest2' 
>> Dec 27 07:24:08 starting migration tunnel 
>> Dec 27 07:24:09 starting online/live migration on port 60000 
>> Dec 27 07:24:09 migrate_set_speed: 8589934592 
>> Dec 27 07:24:11 migration status: active (transferred 66518837, remaining 8314994688), total 8397455360, expected downtime 0) 
>> Dec 27 07:24:13 migration status: active (transferred 121753397, remaining 8259760128), total 8397455360, expected downtime 0) 
>> Dec 27 07:24:15 migration status: active (transferred 171867087, remaining 7475191808), total 8397455360, expected downtime 0) 
>> Dec 27 07:24:17 migration status: active (transferred 178976948, remaining 4921823232), total 8397455360, expected downtime 0) 
>> Dec 27 07:24:19 migration status: active (transferred 227210472, remaining 4726611968), total 8397455360, expected downtime 0) 
>> Dec 27 07:24:21 migration status: active (transferred 282889143, remaining 4361879552), total 8397455360, expected downtime 0) 
>> Dec 27 07:24:23 migration status: active (transferred 345327372, remaining 4270788608), total 8397455360, expected downtime 0) 
>> Dec 27 07:24:25 migration status: active (transferred 407383430, remaining 4185169920), total 8397455360, expected downtime 0) 
>> Dec 27 07:24:27 migration status: active (transferred 469084514, remaining 3742027776), total 8397455360, expected downtime 0) 
>> Dec 27 07:24:29 migration status: active (transferred 469687094, remaining 1273860096), total 8397455360, expected downtime 0) 
>> Dec 27 07:24:31 migration status: active (transferred 501247097, remaining 79024128), total 8397455360, expected downtime 3893) 
>> Dec 27 07:24:33 migration status: active (transferred 532052759, remaining 103800832), total 8397455360, expected downtime 139) 
>> Dec 27 07:24:35 migration status: active (transferred 593541297, remaining 34357248), total 8397455360, expected downtime 85) 
>> Dec 27 07:24:35 migration status: active (transferred 603842750, remaining 37982208), total 8397455360, expected downtime 44) 
>> Dec 27 07:24:36 migration status: active (transferred 612899069, remaining 28667904), total 8397455360, expected downtime 44) 
>> Dec 27 07:24:36 migration status: active (transferred 623036734, remaining 30404608), total 8397455360, expected downtime 43) 
>> Dec 27 07:24:36 migration status: active (transferred 632519102, remaining 28622848), total 8397455360, expected downtime 38) 
>> Dec 27 07:24:36 migration status: active (transferred 638048739, remaining 26222592), total 8397455360, expected downtime 33) 
>> Dec 27 07:24:37 migration speed: 285.71 MB/s - downtime 648 ms 
>> Dec 27 07:24:37 migration status: completed 
>> Dec 27 07:24:42 migration finished successfuly (duration 00:00:36) 
>> TASK OK 
>> ----- Mail original ----- 
>> 
>> De: "Stefan Priebe" <s.priebe at profihost.ag> 
>> À: "Alexandre Derumier" <aderumier at odiso.com> 
>> Cc: pve-devel at pve.proxmox.com 
>> Envoyé: Jeudi 27 Décembre 2012 10:03:39 
>> Objet: Re: [pve-devel] [PATCH 3/3] add downtime && expected_downtime query-migrate info 
>> 
>> Hi, 
>> 
>> to me the whole VM stalls when the new expected downtime is 0. (64bit VM 
>> 4GB Mem 1GB in use VM totally IDLE). 
>> 
>> That's why a low migration_downtime value help for me as qemu does no 
>> longer believe that the expected downtime is 0. 
>> 
>> Greets, 
>> Stefan 
>> 
>> Am 27.12.2012 09:18, schrieb Alexandre Derumier: 
>>> 
>>> Signed-off-by: Alexandre Derumier <aderumier at odiso.com> 
>>> --- 
>>> PVE/QemuMigrate.pm | 6 ++++-- 
>>> 1 file changed, 4 insertions(+), 2 deletions(-) 
>>> 
>>> diff --git a/PVE/QemuMigrate.pm b/PVE/QemuMigrate.pm 
>>> index 282cbc5..38f1d05 100644 
>>> --- a/PVE/QemuMigrate.pm 
>>> +++ b/PVE/QemuMigrate.pm 
>>> @@ -402,7 +402,8 @@ sub phase2 { 
>>> my $delay = time() - $start; 
>>> if ($delay > 0) { 
>>> my $mbps = sprintf "%.2f", $conf->{memory}/$delay; 
>>> - $self->log('info', "migration speed: $mbps MB/s"); 
>>> + my $downtime = $stat->{downtime} || 0; 
>>> + $self->log('info', "migration speed: $mbps MB/s - downtime $downtime ms"); 
>>> } 
>>> } 
>>> 
>>> @@ -424,11 +425,12 @@ sub phase2 { 
>>> my $xbzrlepages = $stat->{"xbzrle-cache"}->{"pages"} || 0; 
>>> my $xbzrlecachemiss = $stat->{"xbzrle-cache"}->{"cache-miss"} || 0; 
>>> my $xbzrleoverflow = $stat->{"xbzrle-cache"}->{"overflow"} || 0; 
>>> + my $expected_downtime = $stat->{"expected-downtime"} || 0; 
>>> #reduce sleep if remainig memory if lower than the everage transfert 
>>> $usleep = 300000 if $avglstat && $rem < $avglstat; 
>>> 
>>> $self->log('info', "migration status: $stat->{status} (transferred ${trans}, " . 
>>> - "remaining ${rem}), total ${total})"); 
>>> + "remaining ${rem}), total ${total}) , expected downtime ${expected_downtime}"); 
>>> 
>>> #$self->log('info', "migration xbzrle cachesize: ${xbzrlecachesize} transferred ${xbzrlebytes} pages ${xbzrlepages} cachemiss ${xbzrlecachemiss} overflow ${xbzrleoverflow}"); 
>>> } 
>>>