<div dir="ltr">Thank you for reply i dont mind if fstab sees partitions. <span class="gmail-im" style="color:rgb(80,0,80)"> I read this "To avoid striping performance<br> problems LVM can't tell that two PVs are on the same physical disk, so if<br>you create a striped LV then the stripes could be on different partitions </span> on the same disk resulting in a *decrease* in performance rather than an<span class="gmail-im" style="color:rgb(80,0,80)"> increase." in the <a href="http://tldp.org">tldp.org</a> but does this apply to disks made from RAID backend ?</span><div><h3 class="gmail-iw" style="overflow:hidden;white-space:nowrap;max-width:92%;font-size:0.75rem;font-weight:inherit;margin:inherit;font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;letter-spacing:0.3px;color:rgb(95,99,104);line-height:20px"><br></h3><div><div dir="ltr" class="m_-8662274235435088732gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Warm Regards<br></div>Urgen Sherpa<br></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Oct 12, 2018 at 9:09 PM Heinz Mauelshagen <<a href="mailto:heinzm@redhat.com" target="_blank">heinzm@redhat.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<div class="m_-8662274235435088732m_-8027134236677368943moz-cite-prefix">On 10/11/18 4:31 PM, Emmanuel Gelati
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">If you use sdb only for data, you don't have need
to use partition on the disk.<br>
</div>
</blockquote>
<p>Though that's true, keeping 1 partition per disk for each LVM PV
adds additional<br>
'visibility' by tools like fdisk/[cs]fdisk, parted etc. showing
the partition type to be 'Liinux LVM'.<br>
</p>
<p>Using the whole disk, blkid or lsblk will provide that
information still,<br>
e.g. 'blkid --match-token TYPE=LVM2_member'.</p>
<p>Heinz<br>
</p>
<blockquote type="cite"><br>
<div class="gmail_quote">
<div dir="ltr">Il giorno gio 11 ott 2018 alle ore 16:26 David
Teigland <<a href="mailto:teigland@redhat.com" target="_blank">teigland@redhat.com</a>> ha
scritto:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Thu, Oct
11, 2018 at 08:53:07AM +0545, Sherpa Sherpa wrote:<br>
> I have LVM(backed by hardware RAID5) with logical volume
and a volume group<br>
> named "dbstore-lv" and "dbstore-vg" which have sdb1 sdb2
sdb3 created from<br>
> same sdb disk.<br>
<br>
> sdb 8:16 0 19.7T 0
disk<br>
> ├─sdb1 8:17 0 7.7T 0
part<br>
> │ └─dbstore-lv (dm-1) 252:1 0 9.4T 0
lvm /var/db/st01<br>
> ├─sdb2 8:18 0 1.7T 0
part<br>
> │ └─dbstore-lv (dm-1) 252:1 0 9.4T 0
lvm /var/db/st01<br>
> └─sdb3 8:19 0 10.3T 0
part<br>
> └─archive--archivedbstore--lv (dm-0) 252:0 0
10.3T 0 lvm<br>
<br>
> I am assuming this is due to disk seek problem as the
same disk partitions<br>
> are used for same LVM or may be its due to saturation of
the disks<br>
<br>
You shouldn't add different partitions as different PVs. If
it's too late<br>
to fix, it might help to create new LV that uses only one of
the<br>
partitions, e.g. lvcreate -n lv -L size vg /dev/sdb2, and then
copy your<br>
current LV to the new one.<br>
<br>
_______________________________________________<br>
linux-lvm mailing list<br>
<a href="mailto:linux-lvm@redhat.com" target="_blank">linux-lvm@redhat.com</a><br>
<a href="https://www.redhat.com/mailman/listinfo/linux-lvm" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/linux-lvm</a><br>
read the LVM HOW-TO at <a href="http://tldp.org/HOWTO/LVM-HOWTO/" rel="noreferrer" target="_blank">http://tldp.org/HOWTO/LVM-HOWTO/</a></blockquote>
</div>
<br clear="all">
<br>
-- <br>
<div dir="ltr" class="m_-8662274235435088732m_-8027134236677368943gmail_signature" data-smartmail="gmail_signature"> .~.<br>
/V\<br>
// \\<br>
/( )\<br>
^`~'^</div>
<br>
<fieldset class="m_-8662274235435088732m_-8027134236677368943mimeAttachmentHeader"></fieldset>
<pre class="m_-8662274235435088732m_-8027134236677368943moz-quote-pre">_______________________________________________
linux-lvm mailing list
<a class="m_-8662274235435088732m_-8027134236677368943moz-txt-link-abbreviated" href="mailto:linux-lvm@redhat.com" target="_blank">linux-lvm@redhat.com</a>
<a class="m_-8662274235435088732m_-8027134236677368943moz-txt-link-freetext" href="https://www.redhat.com/mailman/listinfo/linux-lvm" target="_blank">https://www.redhat.com/mailman/listinfo/linux-lvm</a>
read the LVM HOW-TO at <a class="m_-8662274235435088732m_-8027134236677368943moz-txt-link-freetext" href="http://tldp.org/HOWTO/LVM-HOWTO/" target="_blank">http://tldp.org/HOWTO/LVM-HOWTO/</a></pre>
</blockquote>
<pre class="m_-8662274235435088732m_-8027134236677368943moz-signature" cols="72">
</pre>
</div>
_______________________________________________<br>
linux-lvm mailing list<br>
<a href="mailto:linux-lvm@redhat.com" target="_blank">linux-lvm@redhat.com</a><br>
<a href="https://www.redhat.com/mailman/listinfo/linux-lvm" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/linux-lvm</a><br>
read the LVM HOW-TO at <a href="http://tldp.org/HOWTO/LVM-HOWTO/" rel="noreferrer" target="_blank">http://tldp.org/HOWTO/LVM-HOWTO/</a></blockquote></div>