5:18 p.m.
--_000_9BE6F493F83A594DA60C45E6A09DC5AC016D99D4AUSP01DAG0201co_
Content-Type: text/plain; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable
today i just saw for the first time Clusters =96 General: Edit Policy butto=
n. i changed it from nothing to balanced. googling, it seems that this is=
for CPU load amongst the hosts to balance the CPU load of VMs. the reason=
I'm asking is, my test environment is 3 hosts, and 2 of them are leveled u=
p to above 75% memory usage (both of them complaining on the events console=
), and nothing migrating to the 3rd node which currently has 0 VMs.
do i have something incorrectly configured? i was under the assumption that=
migrations would happen automatically when host resourced were nearing max=
(i assumed this was either CPU or memory)? on my cluster, i checked the s=
etting for memory optimization for servers.
is there anything else? am i not properly understanding the migration theo=
ry? my "guide" link in the upper right does not hyperlink to any docs, so =
I'm left to google and i have not found much so far.
thanks for any advice,
jonathan
________________________________
This is a PRIVATE message. If you are not the intended recipient, please de=
lete without copying and kindly advise us by e-mail of the mistake in deliv=
ery. NOTE: Regardless of content, this e-mail shall not operate to bind SKO=
POS to any order or other contract unless pursuant to explicit written agre=
ement or government initiative expressly permitting the use of e-mail for s=
uch purpose.
--_000_9BE6F493F83A594DA60C45E6A09DC5AC016D99D4AUSP01DAG0201co_
Content-Type: text/html; charset="Windows-1252"
Content-ID: <5BE55D4F9A8C2548978A60846A5F28C6(a)collaborationhost.net>
Content-Transfer-Encoding: quoted-printable
<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html;
charset=3DWindows-1=
252">
</head>
<body style=3D"word-wrap:break-word; color:rgb(0,0,0); font-size:14px; font=
-family:Calibri,sans-serif">
<div>
<div>
<div>today i just saw for the first time Clusters =96 General: Edit Policy =
button. i changed it from nothing to balanced. googling, it see=
ms that this is for CPU load amongst the hosts to balance the CPU load of V=
Ms. the reason I'm asking is, my test environment
is 3 hosts, and 2 of them are leveled up to above 75% memory usage (both o=
f them complaining on the events console), and nothing migrating to the 3rd=
node which currently has 0 VMs.</div>
<div><br>
</div>
<div>do i have something incorrectly configured? i was under the assumption=
that migrations would happen automatically when host resourced were nearin=
g max (i assumed this was either CPU or memory)? on my cluster, i che=
cked the setting for memory optimization
for servers.</div>
<div><br>
</div>
<div>is there anything else? am i not properly understanding the migr=
ation theory? my "guide" link in the upper right does not h=
yperlink to any docs, so I'm left to google and i have not found much so fa=
r.</div>
<div><br>
</div>
<div>thanks for any advice,</div>
<div>jonathan</div>
<div>
<div></div>
</div>
</div>
</div>
<br>
<hr>
<font color=3D"Gray" face=3D"Arial" size=3D"1">This is
a PRIVATE message. I=
f you are not the intended recipient, please delete without copying and kin=
dly advise us by e-mail of the mistake in delivery. NOTE: Regardless of con=
tent, this e-mail shall not operate to
bind SKOPOS to any order or other contract unless pursuant to explicit wri=
tten agreement or government initiative expressly permitting the use of e-m=
ail for such purpose.</font>
</body>
</html>
--_000_9BE6F493F83A594DA60C45E6A09DC5AC016D99D4AUSP01DAG0201co_--
5:32 p.m.
--_000_9BE6F493F83A594DA60C45E6A09DC5AC016DA03BAUSP01DAG0201co_
Content-Type: text/plain; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable
ok, so moments after i sent that question, i finally stumble onto the RHEV =
documentation, and it states that the setting is for CPU load, and you spec=
ify what % and how many minutes its allowed to stay that way before no new =
VMs are allowed to start on the host.
but still leaves the question, what about memory resources and how are they=
governed as far as automatic migrations go?
thanks,
jonathan
From: Jonathan Horne <jhorne@skopos.us<mailto:jhorne@skopos.us>>
Date: Thursday, December 13, 2012 9:18 AM
To: "users@ovirt.org<mailto:users@ovirt.org>"
<users@ovirt.org<mailto:users=
@ovirt.org>>
Subject: [Users] General: Edit Policy
today i just saw for the first time Clusters =96 General: Edit Policy butto=
n. i changed it from nothing to balanced. googling, it seems that this is=
for CPU load amongst the hosts to balance the CPU load of VMs. the reason=
I'm asking is, my test environment is 3 hosts, and 2 of them are leveled u=
p to above 75% memory usage (both of them complaining on the events console=
), and nothing migrating to the 3rd node which currently has 0 VMs.
do i have something incorrectly configured? i was under the assumption that=
migrations would happen automatically when host resourced were nearing max=
(i assumed this was either CPU or memory)? on my cluster, i checked the s=
etting for memory optimization for servers.
is there anything else? am i not properly understanding the migration theo=
ry? my "guide" link in the upper right does not hyperlink to any docs, so =
I'm left to google and i have not found much so far.
thanks for any advice,
jonathan
________________________________
This is a PRIVATE message. If you are not the intended recipient, please de=
lete without copying and kindly advise us by e-mail of the mistake in deliv=
ery. NOTE: Regardless of content, this e-mail shall not operate to bind SKO=
POS to any order or other contract unless pursuant to explicit written agre=
ement or government initiative expressly permitting the use of e-mail for s=
uch purpose.
________________________________
This is a PRIVATE message. If you are not the intended recipient, please de=
lete without copying and kindly advise us by e-mail of the mistake in deliv=
ery. NOTE: Regardless of content, this e-mail shall not operate to bind SKO=
POS to any order or other contract unless pursuant to explicit written agre=
ement or government initiative expressly permitting the use of e-mail for s=
uch purpose.
--_000_9BE6F493F83A594DA60C45E6A09DC5AC016DA03BAUSP01DAG0201co_
Content-Type: text/html; charset="Windows-1252"
Content-ID: <8D42210D4D94B24B84754A4FC09705E8(a)collaborationhost.net>
Content-Transfer-Encoding: quoted-printable
<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html;
charset=3DWindows-1=
252">
</head>
<body style=3D"word-wrap:break-word; color:rgb(0,0,0); font-size:14px; font=
-family:Calibri,sans-serif">
<div>
<div>
<div>ok, so moments after i sent that question, i finally stumble onto the =
RHEV documentation, and it states that the setting is for CPU load, and you=
specify what % and how many minutes its allowed to stay that way before no=
new VMs are allowed to start on
the host.</div>
<div><br>
</div>
<div>but still leaves the question, what about memory resources and how are=
they governed as far as automatic migrations go?</div>
<div><br>
</div>
<div>thanks,</div>
<div>jonathan</div>
<div>
<div></div>
</div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; border-bottom:medium none; border-left:medium none; padding-bottom:0i=
n; padding-left:0in; padding-right:0in; border-top:#b5c4df 1pt solid; borde=
r-right:medium none; padding-top:3pt">
<span style=3D"font-weight:bold">From: </span>Jonathan Horne
<<a href=3D=
"mailto:jhorne@skopos.us">jhorne@skopos.us</a>><br>
<span style=3D"font-weight:bold">Date: </span>Thursday, December 13,
2012 9=
:18 AM<br>
<span style=3D"font-weight:bold">To: </span>"<a
href=3D"mailto:users@o=
virt.org">users(a)ovirt.org</a>&quot; <<a
href=3D"mailto:users@ovirt.org">=
users(a)ovirt.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>[Users] General:
Edit Poli=
cy<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap:break-word; color:rgb(0,0,0); font-size:14px; font-=
family:Calibri,sans-serif">
<div>
<div>
<div>today i just saw for the first time Clusters =96 General: Edit Policy =
button. i changed it from nothing to balanced. googling, it see=
ms that this is for CPU load amongst the hosts to balance the CPU load of V=
Ms. the reason I'm asking is, my test environment
is 3 hosts, and 2 of them are leveled up to above 75% memory usage (both o=
f them complaining on the events console), and nothing migrating to the 3rd=
node which currently has 0 VMs.</div>
<div><br>
</div>
<div>do i have something incorrectly configured? i was under the assumption=
that migrations would happen automatically when host resourced were nearin=
g max (i assumed this was either CPU or memory)? on my cluster, i che=
cked the setting for memory optimization
for servers.</div>
<div><br>
</div>
<div>is there anything else? am i not properly understanding the migr=
ation theory? my "guide" link in the upper right does not h=
yperlink to any docs, so I'm left to google and i have not found much so fa=
r.</div>
<div><br>
</div>
<div>thanks for any advice,</div>
<div>jonathan</div>
<div>
<div></div>
</div>
</div>
</div>
<br>
<hr>
<font color=3D"Gray" face=3D"Arial" size=3D"1">This is
a PRIVATE message. I=
f you are not the intended recipient, please delete without copying and kin=
dly advise us by e-mail of the mistake in delivery. NOTE: Regardless of con=
tent, this e-mail shall not operate to
bind SKOPOS to any order or other contract unless pursuant to explicit wri=
tten agreement or government initiative expressly permitting the use of e-m=
ail for such purpose.</font></div>
</div>
</span><br>
<hr>
<font color=3D"Gray" face=3D"Arial" size=3D"1">This is
a PRIVATE message. I=
f you are not the intended recipient, please delete without copying and kin=
dly advise us by e-mail of the mistake in delivery. NOTE: Regardless of con=
tent, this e-mail shall not operate to
bind SKOPOS to any order or other contract unless pursuant to explicit wri=
tten agreement or government initiative expressly permitting the use of e-m=
ail for such purpose.</font>
</body>
</html>
--_000_9BE6F493F83A594DA60C45E6A09DC5AC016DA03BAUSP01DAG0201co_--
6:49 p.m.
------=_Part_49045177_1495452894.1355417365191
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
----- Original Message -----
From: "Jonathan Horne" <jhorne(a)skopos.us>
To: "Jonathan Horne" <jhorne(a)skopos.us>, users(a)ovirt.org
Sent: Thursday, December 13, 2012 5:32:17 PM
Subject: Re: [Users] General: Edit Policy
ok, so moments after i sent that question, i finally stumble onto
the
RHEV documentation, and it states that the setting is for CPU load,
and you specify what % and how many minutes its allowed to stay that
way before no new VMs are allowed to start on the host.
but still leaves the question, what about memory resources and how
are they governed as far as automatic migrations go?
thanks,
jonathan
From: Jonathan Horne < jhorne(a)skopos.us >
Date: Thursday, December 13, 2012 9:18 AM
To: " users(a)ovirt.org " < users(a)ovirt.org >
Subject: [Users] General: Edit Policy
today i just saw for the first time Clusters =E2=80=93 General: Edit
Poli=
cy
button. i changed it from nothing to balanced. googling, it seems
that this is for CPU load amongst the hosts to balance the CPU load
of VMs. the reason I'm asking is, my test environment is 3 hosts,
and 2 of them are leveled up to above 75% memory usage (both of them
complaining on the events console), and nothing migrating to the 3rd
node which currently has 0 VMs.
do i have something incorrectly configured? i was under the
assumption that migrations would happen automatically when host
resourced were nearing max (i assumed this was either CPU or
memory)? on my cluster, i checked the setting for memory
optimization for servers.
is there anything else? am i not properly understanding the
migration
theory? my "guide" link in the upper right does not hyperlink to any
docs, so I'm left to google and i have not found much so far.
thanks for any advice,
jonathan
This is a PRIVATE message. If you are not the intended recipient,
please delete without copying and kindly advise us by e-mail of the
mistake in delivery. NOTE: Regardless of content, this e-mail shall
not operate to bind SKOPOS to any order or other contract unless
pursuant to explicit written agreement or government initiative
expressly permitting the use of e-mail for such purpose.
This is a PRIVATE message. If you are not the intended recipient,
please delete without copying and kindly advise us by e-mail of the
mistake in delivery. NOTE: Regardless of content, this e-mail shall
not operate to bind SKOPOS to any order or other contract unless
pursuant to explicit written agreement or government initiative
expressly permitting the use of e-mail for such purpose.
Hi Jonathan,=20
Indeed this works for memory overcommitment.=20
A ssuming you have ksm running on your hosts , it should share memory pages=
=20
allowing you to do memory overcommitment. Note that currently oVirt has an=
=20
indication for each host if it has shared pages or not, and the relevant pe=
rcentage=20
(Click a host, watch the General sub-tab: "Memory Page Sharing" and
"Shared=
Memory").=20
WRT doing mistakes, we're planning to improve it in the future. but for now=
, if your sharing=20
is poor, the host may start swapping the guests which is not good performan=
ce-wise.=20
I suggest you give it a try, and watch the statistics, as each OS has its o=
wn memory behavior.=20
Let me know if you have more questions.=20
Doron=20
------=_Part_49045177_1495452894.1355417365191
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: quoted-printable
<html><head><style type=3D'text/css'>p { margin: 0;
}</style></head><body><=
div style=3D'font-family: times new roman,new york,times,serif; font-size: =
12pt; color: #000000'><hr id=3D"zwchr"><blockquote
id=3D"DWT10941" style=3D=
"border-left:2px solid rgb(16, 16, 255);margin-left:5px;padding-left:5px;co=
lor:#000;font-weight:normal;font-style:normal;text-decoration:none;font-fam=
ily:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From:
</b>"Jonathan Horn=
e" &lt;jhorne(a)skopos.us&gt;<br><b>To: </b>"Jonathan
Horne" <jhorne@skopo=
s.us>, users(a)ovirt.org<br><b>Sent: </b>Thursday, December 13,
2012 5:32:=
17 PM<br><b>Subject: </b>Re: [Users] General: Edit
Policy<br><br>
<div>
<div>
<div>ok, so moments after i sent that question, i finally stumble onto the =
RHEV documentation, and it states that the setting is for CPU load, and you=
specify what % and how many minutes its allowed to stay that way before no=
new VMs are allowed to start on
the host.</div>
<div><br>
</div>
<div>but still leaves the question, what about memory resources and how are=
they governed as far as automatic migrations go?</div>
<div><br>
</div>
<div>thanks,</div>
<div>jonathan</div>
<div>
<div></div>
</div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; border-bottom:medium none; border-left:medium none; padding-bottom:0i=
n; padding-left:0in; padding-right:0in; border-top:#b5c4df 1pt solid; borde=
r-right:medium none; padding-top:3pt">
<span style=3D"font-weight:bold">From: </span>Jonathan Horne
<<a href=3D=
"mailto:jhorne@skopos.us"
target=3D"_blank">jhorne(a)skopos.us</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, December 13,
2012 9=
:18 AM<br>
<span style=3D"font-weight:bold">To: </span>"<a
href=3D"mailto:users@ovirt.=
org" target=3D"_blank">users(a)ovirt.org</a>" <<a
href=3D"mailto:users@ovi=
rt.org" target=3D"_blank">users(a)ovirt.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>[Users] General:
Edit Poli=
cy<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap:break-word; color:; font-size:14px; font-family:Cal=
ibri,sans-serif">
<div>
<div>
<div>today i just saw for the first time Clusters =E2=80=93 General: Edit P=
olicy button. i changed it from nothing to balanced. googling, =
it seems that this is for CPU load amongst the hosts to balance the CPU loa=
d of VMs. the reason I'm asking is, my test environment
is 3 hosts, and 2 of them are leveled up to above 75% memory usage (both o=
f them complaining on the events console), and nothing migrating to the 3rd=
node which currently has 0 VMs.</div>
<div><br>
</div>
<div>do i have something incorrectly configured? i was under the assumption=
that migrations would happen automatically when host resourced were nearin=
g max (i assumed this was either CPU or memory)? on my cluster, i che=
cked the setting for memory optimization
for servers.</div>
<div><br>
</div>
<div>is there anything else? am i not properly understanding the migr=
ation theory? my "guide" link in the upper right does not hyperlink
t=
o any docs, so I'm left to google and i have not found much so far.</div>
<div><br>
</div>
<div>thanks for any advice,</div>
<div>jonathan</div>
<div>
<div></div>
</div>
</div>
</div>
<br>
<hr>
<font color=3D"Gray" face=3D"Arial" size=3D"1">This is
a PRIVATE message. I=
f you are not the intended recipient, please delete without copying and kin=
dly advise us by e-mail of the mistake in delivery. NOTE: Regardless of con=
tent, this e-mail shall not operate to
bind SKOPOS to any order or other contract unless pursuant to explicit wri=
tten agreement or government initiative expressly permitting the use of e-m=
ail for such purpose.</font></div>
</div>
</span><br>
<hr>
<font color=3D"Gray" face=3D"Arial" size=3D"1">This is
a PRIVATE message. I=
f you are not the intended recipient, please delete without copying and kin=
dly advise us by e-mail of the mistake in delivery. NOTE: Regardless of con=
tent, this e-mail shall not operate to
bind SKOPOS to any order or other contract unless pursuant to explicit wri=
tten agreement or government initiative expressly permitting the use of e-m=
ail for such purpose.</font>
<br><br></blockquote>Hi Jonathan,<br>Indeed this works for memory
overcommi=
tment.<br>Assuming you have ksm running on your hosts, it should share memo=
ry pages<br>allowing you to do memory overcommitment. Note that currently o=
Virt has an<br>indication for each host if it has shared pages or not, and =
the relevant percentage<br>(Click a host, watch the General sub-tab: "Memor=
y Page Sharing" and "Shared Memory").<br><br>WRT doing
mistakes, we're plan=
ning to improve it in the future. but for now, if your sharing<br>is poor, =
the host may start swapping the guests which is not good performance-wise.<=
br><br>I suggest you give it a try, and watch the statistics, as each OS ha=
s its own memory behavior.<br>Let me know if you have more
questions.<br><b=
r>Doron<br><blockquote style=3D"border-left: 2px solid rgb(16, 16, 255);
ma=
rgin-left: 5px; padding-left: 5px; color: rgb(0, 0, 0); font-weight: normal=
; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,s=
ans-serif; font-size:
12pt;"></blockquote></div></body></html>
------=_Part_49045177_1495452894.1355417365191--
4363
days inactive
4363
days old
2 comments
2 participants
participants (2)
-
Doron Fediuck -
Jonathan Horne