2:05 a.m.
--_000_SN1PR08MB1389E9AA24246B61EE308341A6730SN1PR08MB1389namp_
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64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--_000_SN1PR08MB1389E9AA24246B61EE308341A6730SN1PR08MB1389namp_
Content-Type: text/html; charset="utf-8"
Content-ID:
<7766EE5FA0193D41AFCE783FA42221BE(a)sct-15-1-485-2-msonline-outlook-1173a.templateTenant>
Content-Transfer-Encoding: base64
PGh0bWwgeG1sbnM6bz0idXJuOnNjaGVtYXMtbWljcm9zb2Z0LWNvbTpvZmZpY2U6b2ZmaWNlIiB4
bWxuczp3PSJ1cm46c2NoZW1hcy1taWNyb3NvZnQtY29tOm9mZmljZTp3b3JkIiB4bWxuczptPSJo
dHRwOi8vc2NoZW1hcy5taWNyb3NvZnQuY29tL29mZmljZS8yMDA0LzEyL29tbWwiIHhtbG5zPSJo
dHRwOi8vd3d3LnczLm9yZy9UUi9SRUMtaHRtbDQwIj4NCjxoZWFkPg0KPG1ldGEgaHR0cC1lcXVp
dj0iQ29udGVudC1UeXBlIiBjb250ZW50PSJ0ZXh0L2h0bWw7IGNoYXJzZXQ9dXRmLTgiPg0KPG1l
dGEgbmFtZT0iR2VuZXJhdG9yIiBjb250ZW50PSJNaWNyb3NvZnQgV29yZCAxNSAoZmlsdGVyZWQg
bWVkaXVtKSI+DQo8c3R5bGU+PCEtLQ0KLyogRm9udCBEZWZpbml0aW9ucyAqLw0KQGZvbnQtZmFj
ZQ0KCXtmb250LWZhbWlseToiQ2FtYnJpYSBNYXRoIjsNCglwYW5vc2UtMToyIDQgNSAzIDUgNCA2
IDMgMiA0O30NCkBmb250LWZhY2UNCgl7Zm9udC1mYW1pbHk6Q2FsaWJyaTsNCglwYW5vc2UtMToy
IDE1IDUgMiAyIDIgNCAzIDIgNDt9DQovKiBTdHlsZSBEZWZpbml0aW9ucyAqLw0KcC5Nc29Ob3Jt
YWwsIGxpLk1zb05vcm1hbCwgZGl2Lk1zb05vcm1hbA0KCXttYXJnaW46MGluOw0KCW1hcmdpbi1i
b3R0b206LjAwMDFwdDsNCglmb250LXNpemU6MTEuMHB0Ow0KCWZvbnQtZmFtaWx5OiJDYWxpYnJp
IixzYW5zLXNlcmlmO30NCmE6bGluaywgc3Bhbi5Nc29IeXBlcmxpbmsNCgl7bXNvLXN0eWxlLXBy
aW9yaXR5Ojk5Ow0KCWNvbG9yOmJsdWU7DQoJdGV4dC1kZWNvcmF0aW9uOnVuZGVybGluZTt9DQph
OnZpc2l0ZWQsIHNwYW4uTXNvSHlwZXJsaW5rRm9sbG93ZWQNCgl7bXNvLXN0eWxlLXByaW9yaXR5
Ojk5Ow0KCWNvbG9yOiM5NTRGNzI7DQoJdGV4dC1kZWNvcmF0aW9uOnVuZGVybGluZTt9DQouTXNv
Q2hwRGVmYXVsdA0KCXttc28tc3R5bGUtdHlwZTpleHBvcnQtb25seTt9DQpAcGFnZSBXb3JkU2Vj
dGlvbjENCgl7c2l6ZTo4LjVpbiAxMS4waW47DQoJbWFyZ2luOjEuMGluIDEuMGluIDEuMGluIDEu
MGluO30NCmRpdi5Xb3JkU2VjdGlvbjENCgl7cGFnZTpXb3JkU2VjdGlvbjE7fQ0KLS0+PC9zdHls
ZT4NCjwvaGVhZD4NCjxib2R5IGxhbmc9IkVOLVVTIiBsaW5rPSJibHVlIiB2bGluaz0iIzk1NEY3
MiI+DQo8ZGl2IGNsYXNzPSJXb3JkU2VjdGlvbjEiPg0KPHAgY2xhc3M9Ik1zb05vcm1hbCI+SGVs
bG8sPC9wPg0KPHAgY2xhc3M9Ik1zb05vcm1hbCI+Jm5ic3A7PC9wPg0KPHAgY2xhc3M9Ik1zb05v
cm1hbCI+TGV04oCZcyBzYXkgSSBoYXZlIGEgNSBub2RlIGNvbnZlcmdlZCBjbHVzdGVyIG9mIG9W
aXJ0ICZhbXA7IGdsdXN0ZXJGUyB3aXRoIGEgcmVwbGljYSBjb3VudCBvZiDigJwz4oCdLjwvcD4N
CjxwIGNsYXNzPSJNc29Ob3JtYWwiPiZuYnNwOzwvcD4NCjxwIGNsYXNzPSJNc29Ob3JtYWwiPkhv
c3QxIC0gcmVwbGljYTwvcD4NCjxwIGNsYXNzPSJNc29Ob3JtYWwiPkhvc3QyIC0gcmVwbGljYTwv
cD4NCjxwIGNsYXNzPSJNc29Ob3JtYWwiPkhvc3QzIC0gcmVwbGljYTwvcD4NCjxwIGNsYXNzPSJN
c29Ob3JtYWwiPkhvc3Q0PC9wPg0KPHAgY2xhc3M9Ik1zb05vcm1hbCI+SG9zdDU8L3A+DQo8cCBj
bGFzcz0iTXNvTm9ybWFsIj48c3BhbiBzdHlsZT0iZm9udC1zaXplOjEyLjBwdDtmb250LWZhbWls
eTomcXVvdDtUaW1lcyBOZXcgUm9tYW4mcXVvdDssc2VyaWYiPiZuYnNwOzwvc3Bhbj48L3A+DQo8
cCBjbGFzcz0iTXNvTm9ybWFsIj48c3BhbiBzdHlsZT0iZm9udC1zaXplOjEyLjBwdDtmb250LWZh
bWlseTomcXVvdDtUaW1lcyBOZXcgUm9tYW4mcXVvdDssc2VyaWYiPklmIEkgc3BpbiBhIFZNIHVw
IG9uIEhvc3QxIOKAkyBkb2VzIHRoZSBmaXJzdCByZXBsaWNhIGdldCBjcmVhdGVkIGxvY2FsIHRv
IHRoYXQgc2VydmVyPzwvc3Bhbj48L3A+DQo8cCBjbGFzcz0iTXNvTm9ybWFsIj48c3BhbiBzdHls
ZT0iZm9udC1zaXplOjEyLjBwdDtmb250LWZhbWlseTomcXVvdDtUaW1lcyBOZXcgUm9tYW4mcXVv
dDssc2VyaWYiPiZuYnNwOzwvc3Bhbj48L3A+DQo8cCBjbGFzcz0iTXNvTm9ybWFsIj48c3BhbiBz
dHlsZT0iZm9udC1zaXplOjEyLjBwdDtmb250LWZhbWlseTomcXVvdDtUaW1lcyBOZXcgUm9tYW4m
cXVvdDssc2VyaWYiPkluIHRoZSBldmVudCBJIG1vdmUgdGhlIFZNIHRvIGFub3RoZXIgaG9zdCwg
ZG9lcyB0aGUgcmVwbGljYSBvZiB0aGUgZGlzayBmb2xsb3cgdGhlIFZNIHNvIGVzc2VudGlhbGx5
IGl04oCZcyB3cml0aW5nIHRvIGEgbG9jYWwgY29weSBmaXJzdCBvciBkb2VzIGl0IOKAnGFsd2F5
c+KAnSB3cml0ZSBhY3Jvc3MNCiB0aGUgbmV0d29yay48L3NwYW4+PC9wPg0KPHAgY2xhc3M9Ik1z
b05vcm1hbCI+PHNwYW4gc3R5bGU9ImZvbnQtc2l6ZToxMi4wcHQ7Zm9udC1mYW1pbHk6JnF1b3Q7
VGltZXMgTmV3IFJvbWFuJnF1b3Q7LHNlcmlmIj4mbmJzcDs8L3NwYW4+PC9wPg0KPHAgY2xhc3M9
Ik1zb05vcm1hbCI+PHNwYW4gc3R5bGU9ImZvbnQtc2l6ZToxMi4wcHQ7Zm9udC1mYW1pbHk6JnF1
b3Q7VGltZXMgTmV3IFJvbWFuJnF1b3Q7LHNlcmlmIj5Gb3IgZXhhbXBsZSwgd2l0aCBWTXdhcmUs
IHRoZSBkaXNrIHdpbGwgZm9sbG93IHRoZSBWTSB0byB0aGUgaHlwZXJ2aXNvciB5b3UgbW92ZSBp
dCB0byBzbyB0aGF0IHRoZSB3cml0ZXMgYXJlIGVzc2VudGlhbGx5IOKAnGxvY2Fs4oCdLg0KPC9z
cGFuPjwvcD4NCjxwIGNsYXNzPSJNc29Ob3JtYWwiPjxzcGFuIHN0eWxlPSJmb250LXNpemU6MTIu
MHB0O2ZvbnQtZmFtaWx5OiZxdW90O1RpbWVzIE5ldyBSb21hbiZxdW90OyxzZXJpZiI+Jm5ic3A7
PC9zcGFuPjwvcD4NCjxwIGNsYXNzPSJNc29Ob3JtYWwiPjxzcGFuIHN0eWxlPSJmb250LXNpemU6
MTIuMHB0O2ZvbnQtZmFtaWx5OiZxdW90O1RpbWVzIE5ldyBSb21hbiZxdW90OyxzZXJpZiI+SSBo
YXZlIG5vdCBiZWVuIGFibGUgdG8gZmluZCBhbnl0aGluZyBvbiB0aGUgaW50ZXJuZXQgb3IgaW4g
dGhlIGRvY3VtZW50YXRpb24gdGhhdCBzcGVjaWZpZXMgaG93IHRoaXMgcHJvY2VzcyB3b3Jrcy4g
SWRlYWxseSwgeW91IHdvdWxkbuKAmXQgd2FudCBhIFZNIHJlc2lkaW5nIG9uIEhvc3QxIHRoYXQN
CiBhY2Nlc3NlcyBpdHMgZGlzayBvbiBIb3N0My4gTXVsdGlwbGUgdGhhdCBieSBodW5kcmVkcyBv
ZiBWTeKAmXMgYW5kIGl0IHdvdWxkIGNyZWF0ZSBhIHRvbiBvZiB1bm5lY2Vzc2FyeSBuZXR3b3Jr
IGNvbmdlc3Rpb24uPC9zcGFuPjwvcD4NCjxwIGNsYXNzPSJNc29Ob3JtYWwiPjxvOnA+Jm5ic3A7
PC9vOnA+PC9wPg0KPC9kaXY+DQo8L2JvZHk+DQo8L2h0bWw+DQo=
--_000_SN1PR08MB1389E9AA24246B61EE308341A6730SN1PR08MB1389namp_--
2:54 p.m.
On Thursday, May 12, 2016 12:05:22 AM Bill Bill wrote:
Hello,
Let’s say I have a 5 node converged cluster of oVirt & glusterFS with a
replica count of “3”.
Host1 - replica
Host2 - replica
Host3 - replica
Host4
Host5
If I spin a VM up on Host1 – does the first replica get created local to
that server?
In the event I move the VM to another host, does the replica of the
disk
follow the VM so essentially it’s writing to a local copy first or does it
“always” write across the network.
For example, with VMware, the disk will follow the VM to the
hypervisor you
move it to so that the writes are essentially “local”.
I have not been able to find anything on the internet or in the
documentation that specifies how this process works. Ideally, you wouldn’t
want a VM residing on Host1 that accesses its disk on Host3. Multiple that
by hundreds of VM’s and it would create a ton of unnecessary network
congestion.
While I cannot answer your actual question as I don't know enough about the
internal implementation of how oVirt interacts with gluster. I just want to
point out major difference between oVirt and VMWare. In oVirt storage domains
are attached to data centers, not hosts. So there is no does the disk move
from host1 to host2. The disk is on the storage domain and host1 and host2 and
every other host in the data center has access to the storage domain.
9:05 a.m.
This is a multi-part message in MIME format.
--------------050708010909020807020403
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 8bit
On 05/12/2016 05:35 AM, Bill Bill wrote:
Hello,
Lets say I have a 5 node converged cluster of oVirt & glusterFS with
a replica count of 3.
Host1 - replica
Host2 - replica
Host3 - replica
Host4
Host5
If I spin a VM up on Host1 does the first replica get created local
to that server?
In the event I move the VM to another host, does the replica of the
disk follow the VM so essentially its writing to a local copy first
or does it always write across the network.
Any writes are written to all 3 hosts that form the replica 3 gluster
volume. Replica 3 - indicates that there is a 3-way copy of data, and
the same data resides on Host1, Host2 and Host3.
Reads however are from local host. So for a VM running on Host1, it will
access the data (i.e. read) from the brick on Host1.
For example, with VMware, the disk will follow the VM to the
hypervisor you move it to so that the writes are essentially local.
I have not been able to find anything on the internet or in the
documentation that specifies how this process works. Ideally, you
wouldnt want a VM residing on Host1 that accesses its disk on Host3.
Multiple that by hundreds of VMs and it would create a ton of
unnecessary network congestion.
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
--------------050708010909020807020403
Content-Type: text/html; charset=windows-1252
Content-Transfer-Encoding: 8bit
<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<br>
<br>
<div class="moz-cite-prefix">On 05/12/2016 05:35 AM, Bill Bill
wrote:<br>
</div>
<blockquote
cite="mid:SN1PR08MB1389E9AA24246B61EE308341A6730@SN1PR08MB1389.namprd08.prod.outlook.com"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
<meta name="Generator" content="Microsoft Word 15 (filtered
medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style>
<div class="WordSection1">
<p class="MsoNormal">Hello,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Lets say I have a 5 node converged cluster
of oVirt & glusterFS with a replica count of 3.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Host1 - replica</p>
<p class="MsoNormal">Host2 - replica</p>
<p class="MsoNormal">Host3 - replica</p>
<p class="MsoNormal">Host4</p>
<p class="MsoNormal">Host5</p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif">If I spin a VM up on Host1 does the
first replica get created local to that server?</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif">In the event I move the VM to another
host, does the replica of the disk follow the VM so
essentially its writing to a local copy first or does it
always write across the network.</span></p>
</div>
</blockquote>
<br>
Any writes are written to all 3 hosts that form the replica 3
gluster volume. Replica 3 - indicates that there is a 3-way copy of
data, and the same data resides on Host1, Host2 and Host3. <br>
<br>
Reads however are from local host. So for a VM running on Host1, it
will access the data (i.e. read) from the brick on Host1.<br>
<br>
<blockquote
cite="mid:SN1PR08MB1389E9AA24246B61EE308341A6730@SN1PR08MB1389.namprd08.prod.outlook.com"
type="cite">
<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif">For example, with VMware, the disk will
follow the VM to the hypervisor you move it to so that the
writes are essentially local.
</span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif"> </span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman",serif">I have not been able to find anything on
the internet or in the documentation that specifies how this
process works. Ideally, you wouldnt want a VM residing on
Host1 that accesses its disk on Host3. Multiple that by
hundreds of VMs and it would create a ton of unnecessary
network congestion.</span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Users mailing list
<a class="moz-txt-link-abbreviated"
href="mailto:Users@ovirt.org">Users@ovirt.org</a>
<a class="moz-txt-link-freetext"
href="http://lists.ovirt.org/mailman/listinfo/users">http://...
</pre>
</blockquote>
<br>
</body>
</html>
--------------050708010909020807020403--
2922
days inactive
2927
days old
2 comments
3 participants
participants (3)
-
Alexander Wels -
Bill Bill -
Sahina Bose