RE: RAC - Configuring Disk Coordinator

From: Matthew Zito <mzito_at_gridapp.com>
Date: Fri, 25 Jul 2003 14:31:15 -0400
Message-Id: <26013.339640@fatcity.com>

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Whoops - I missed a question in there. Smallest lun possible? On the older HDS thunder systems, you can make teeny-tiny luns - I'm guessing the 9570V is the same way. Make a raid group and carve a few small luns out of it.

Matt

--

Matthew Zito
GridApp Systems
Email: mzito_at_gridapp.com
Cell: 646-220-3551
Phone: 212-358-8211 x 359
<http://www.gridapp.com/> http://www.gridapp.com

-----Original Message-----

From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] On Behalf Of Matthew Zito
Sent: Friday, July 25, 2003 1:54 PM
To: Multiple recipients of list ORACLE-L Subject: RE: RAC - Configuring Disk Coordinator

To answer your questions.....

Ideally, yes, though they don't need to be.
Absolutely. Veritas will get very unhappy if it loses access to those disks
SCSI-3 Persistent Reservation. When a node "malfunctions", another node will issue a SCSI-3 reservation against the 3 coordinator disks. When the broken node tries to access those disks (as it does every few seconds normally) it will be rejected and the box will panic (I'm pretty sure it panics - test it)

Feel free to email me off-list if you have any other questions.

Thanks,
Matt

--

Matthew Zito
GridApp Systems
Email: mzito_at_gridapp.com
Cell: 646-220-3551
Phone: 212-358-8211 x 359
http://www.gridapp.com <http://www.gridapp.com/>

-----Original Message-----

From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] On Behalf Of laura pena
Sent: Friday, July 25, 2003 1:04 PM
To: Multiple recipients of list ORACLE-L Subject: Re: RAC - Configuring Disk Coordinator

Sorry all my message got hacked here is the first paragraph

Going through the Veritas installation guide (pg 47) and I have a question on the required 3 LUN creation needed to support RAC for Veritas DBE/AC, when setting up Disk Coordinator:

laura pena <lizzpenaorclgrp_at_yahoo.com> wrote:

Configuration - Should each of these 3 LUN be on seperate disks?
What is the smallest LUN that Hitachi 9570V can be? I guess I can ask our rep if no ones knows.
-Should these LUNs be mirrored?
Coordinator disks are used to support IO fencing can anyone elborate how this happens?

Thanks in advance,

Lizz

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<DIV><FONT face=3DArial color=3D#0000ff size=3D2></FONT>&nbsp;</DIV>
<DIV><SPAN class=3D301270618-25072003><FONT face=3DArial color=3D#0000ff =

size=3D2> Whoops - I missed  a question in there.  = Smallest lun=20
possible?  On the older HDS thunder systems, you can make = teeny-tiny luns -=20
I'm guessing the 9570V is the same way.  Make a raid group and = carve a few=20
small luns out of it.</FONT></SPAN></DIV> <DIV><SPAN class=3D301270618-25072003><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D301270618-25072003><FONT face=3DArial color=3D#0000ff =

size=3D2>Matt</FONT></SPAN></DIV>

<P><FONT size=3D2>-<SPAN class=3D301270618-25072003>-</SPAN><BR>Matthew=20 Zito<BR>GridApp Systems<BR>Email: mzito_at_gridapp.com<BR>Cell:=20 646-220-3551<BR>Phone: 212-358-8211 x 359<BR></FONT><A=20 href=3D"http://www.gridapp.com/"><FONT = size=3D2>http://www.gridapp.com</FONT></A>=20 </P>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px = solid; MARGIN-RIGHT: 0px">
  <DIV></DIV>
  <DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr = align=3Dleft><FONT=20
  face=3DTahoma size=3D2>-----Original Message-----<BR><B>From:</B>=20   ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] <B>On Behalf Of=20   </B>Matthew Zito<BR><B>Sent:</B> Friday, July 25, 2003 1:54 = PM<BR><B>To:</B>=20
  Multiple recipients of list ORACLE-L<BR><B>Subject:</B> RE: RAC - = Configuring=20
  Disk Coordinator<BR><BR></FONT></DIV>
  <DIV><FONT face=3DArial color=3D#0000ff size=3D2></FONT> </DIV>   <DIV><SPAN class=3D395505217-25072003><FONT face=3DArial = color=3D#0000ff size=3D2>To=20
  answer your questions.....</FONT></SPAN></DIV>   <DIV><SPAN class=3D395505217-25072003><FONT face=3DArial = color=3D#0000ff=20
  size=3D2></FONT></SPAN> </DIV>
  <DIV><SPAN class=3D395505217-25072003><FONT face=3DArial = color=3D#0000ff size=3D2>1)=20
  Ideally, yes, though they don't need to be.</FONT></SPAN></DIV>   <DIV><SPAN class=3D395505217-25072003><FONT face=3DArial = color=3D#0000ff size=3D2>2)=20
  Absolutely.  Veritas will get very unhappy if it loses access to = those=20
  disks</FONT></SPAN></DIV>
  <DIV><SPAN class=3D395505217-25072003><FONT face=3DArial = color=3D#0000ff size=3D2>3)=20
  SCSI-3 Persistent Reservation.  When a node "malfunctions", = another node=20
  will issue a SCSI-3 reservation against the 3 coordinator disks.  = When=20
  the broken node tries to access those disks (as it does every few = seconds=20
  normally) it will be rejected and the box will panic (I'm pretty sure = it=20
  panics - test it)</FONT></SPAN></DIV>
  <DIV><SPAN class=3D395505217-25072003><FONT face=3DArial = color=3D#0000ff=20
  size=3D2></FONT></SPAN> </DIV>
  <DIV><SPAN class=3D395505217-25072003><FONT face=3DArial = color=3D#0000ff size=3D2>Feel=20
  free to email me off-list if you have any other = questions.</FONT></SPAN></DIV>
  <DIV><SPAN class=3D395505217-25072003><FONT face=3DArial = color=3D#0000ff=20
  size=3D2></FONT></SPAN> </DIV>
  <DIV><SPAN class=3D395505217-25072003><FONT face=3DArial = color=3D#0000ff=20
  size=3D2>Thanks,</FONT></SPAN></DIV>
  <DIV><SPAN class=3D395505217-25072003><FONT face=3DArial = color=3D#0000ff=20
  size=3D2>Matt</FONT></SPAN></DIV>
  <DIV><FONT face=3DArial color=3D#0000ff = size=3D2></FONT> </DIV>   <P><FONT size=3D2>--<BR>Matthew Zito<BR>GridApp Systems<BR>Email:=20   mzito_at_gridapp.com<BR>Cell: 646-220-3551<BR>Phone: 212-358-8211 x = 359<BR><A=20
  href=3D"http://www.gridapp.com/">http://www.gridapp.com</A></FONT> = </P>
  <BLOCKQUOTE=20
  style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px = solid; MARGIN-RIGHT: 0px">

<DIV></DIV>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr = align=3Dleft><FONT=20

face=3DTahoma size=3D2>-----Original Message-----<BR><B>From:</B>=20 ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] <B>On Behalf Of =

</B>laura pena<BR><B>Sent:</B> Friday, July 25, 2003 1:04 = PM<BR><B>To:</B>=20

Multiple recipients of list ORACLE-L<BR><B>Subject:</B> Re: RAC -=20 Configuring Disk Coordinator<BR><BR></FONT></DIV> <DIV>
<DIV>Sorry all my message got hacked here is the first = paragraph</DIV>

<DIV> </DIV>
<DIV>Going through the Veritas installation guide  (pg 47) and = I have a=20

question on the required 3 LUN creation needed to support RAC for = Veritas=20

DBE/AC, when setting up Disk Coordinator:</DIV><BR><BR><B><I>laura = pena=20

<lizzpenaorclgrp_at_yahoo.com></I></B> wrote:=20 <BLOCKQUOTE=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff = 2px solid; WIDTH: 100%">

      <DIV>
      <DIV>- Configuration - Should each of these 3 LUN be on seperate=20
      disks?<BR>- What is the smallest LUN that Hitachi 9570V can be? I =
guess I=20
      can ask our rep if no ones knows.<BR>-Should these LUNs be =
mirrored? <BR>-=20
      Coordinator disks are used to support IO fencing can anyone =
elborate how=20
      this happens?</DIV>
      <DIV>&nbsp;</DIV>
      <DIV>Thanks in advance,</DIV>
      <DIV>&nbsp;</DIV>
      <DIV>Lizz</DIV></DIV>
      <P>
      <HR SIZE=3D1>
      Do you Yahoo!?<BR><A=20
      =

href=3D"http://us.rd.yahoo.com/evt=3D10469/*http://sitebuilder.yahoo.com"= >Yahoo!=20

      SiteBuilder</A> - Free, easy-to-use web site design=20     software</BLOCKQUOTE></DIV>
    <P>
    <HR SIZE=3D1>
    Do you Yahoo!?<BR><A=20
    = Received on Fri Jul 25 2003 - 13:31:15 CDT