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<DIV><FONT size=2 face=Arial>Thanks for your nice answer Eric</FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><FONT face=Arial><FONT size=2><FONT
face=Arial><FONT size=2><FONT face=Arial><FONT size=2><FONT size=2
face=Arial></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT> </DIV>
<DIV><SPAN lang=en class=short_text><FONT size=2 face=Arial><SPAN>@Dietmar or
anyone that can answer, please let me to do a
questions:</SPAN></FONT></SPAN></DIV>
<DIV><FONT face=Arial><FONT size=2><FONT face=Arial><FONT size=2><FONT
face=Arial><FONT size=2><FONT size=2
face=Arial></FONT></FONT></FONT></FONT></FONT></FONT></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Note: <BR>These questions is because I am involved
in a project and the idea is to use several RAID 10 in the same PVE Host for use
of a VM with MS-SQL Server, and for the backup a single SATA hard drive will be
used on an NFS Server, and i don't want get performance degradation or at
least a minimun of degradation</FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><FONT face=Arial><FONT size=2><FONT size=2
face=Arial></FONT></FONT></FONT></FONT></FONT> </DIV>
<DIV><SPAN lang=en class=short_text><FONT size=2 face=Arial><SPAN>1- But as the
buffer need RAM free, what are the RAM requirements for use this buffer?<BR>2-
The requeriments of buffer RAM will be always static in any case, or will be
dinamic?<BR>3- If is dinamic, which will be the formula that i need to know for
obtain a nice performance? (for buy the RAM that will be
necessary)</SPAN></FONT></SPAN></DIV>
<DIV><SPAN lang=en class=short_text><FONT size=2 face=Arial><SPAN>4- Will get I
at least a minimum of degradation in this case (<SPAN id=result_box lang=en
class=short_text><SPAN class=hps>obviously while "KVM Live Backup" is
running)</SPAN></SPAN>? (see the note above)</SPAN></FONT></SPAN></DIV>
<DIV><FONT face=Arial><FONT size=2><FONT face=Arial><FONT size=2><FONT
face=Arial><FONT size=2><FONT face=Arial><FONT size=2><FONT size=2
face=Arial><SPAN lang=en class=short_text><FONT size=3><FONT size=2
face=Arial><SPAN></SPAN></FONT></FONT></SPAN></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT> </DIV>
<DIV><SPAN lang=en class=short_text><FONT size=2 face=Arial><SPAN>Best
regards</SPAN></FONT></SPAN></DIV>
<DIV><SPAN lang=en class=short_text><FONT size=2
face=Arial><SPAN>Cesar</SPAN></FONT></SPAN></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=eric@netwalk.com href="mailto:eric@netwalk.com">Eric Blevins</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=pve-devel@pve.proxmox.com
href="mailto:pve-devel@pve.proxmox.com">pve-devel@pve.proxmox.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, January 28, 2014 11:12
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [pve-devel] KVM Live Backup
performance</DIV>
<DIV><BR></DIV>
<DIV class=moz-cite-prefix><BR></DIV>
<BLOCKQUOTE cite=mid:E38EA325183545A79B3EBC3CE665B6A2@gerencia
type="cite"><BR>
<DIV><FONT size=2 face=Arial>Anyways, I will try to upgrade KVM to 1.7 first
(many backup related changes). <BR>We can then test again and try to
optimize further.</FONT></DIV>
<DIV> </DIV></BLOCKQUOTE><BR>Cesar, from my testing KVM 1.7 fixed the
backup related performance issues.<BR>See archive: <A
class=moz-txt-link-freetext
href="http://pve.proxmox.com/pipermail/pve-devel/2013-December/009296.html">http://pve.proxmox.com/pipermail/pve-devel/2013-December/009296.html</A><BR><BR>The
buffers related to Live backup are for the data sent to the backup, not the
data sent to the VMs disk.<BR>The data sent to the disk will still use
whatever cache policy you have set for that disk.<BR>
<P>
<HR>
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