<font size=2 face="sans-serif">New FS? Yes there are some good reasons.
</font><br><font size=2 face="sans-serif">New cluster? I did not see a compelling
argument either way.</font><br><br><br><br><font size=1 color=#5f5f5f face="sans-serif">From:
</font><font size=1 face="sans-serif">"Mark.Bush@siriuscom.com"
<Mark.Bush@siriuscom.com></font><br><font size=1 color=#5f5f5f face="sans-serif">To:
</font><font size=1 face="sans-serif">gpfsug main discussion
list <gpfsug-discuss@spectrumscale.org></font><br><font size=1 color=#5f5f5f face="sans-serif">Date:
</font><font size=1 face="sans-serif">10/11/2016 03:34 PM</font><br><font size=1 color=#5f5f5f face="sans-serif">Subject:
</font><font size=1 face="sans-serif">Re: [gpfsug-discuss]
Hardware refresh</font><br><font size=1 color=#5f5f5f face="sans-serif">Sent by:
</font><font size=1 face="sans-serif">gpfsug-discuss-bounces@spectrumscale.org</font><br><hr noshade><br><br><br><font size=2 face="Calibri">Ok. I think I am hearing that a new
cluster with a new FS and copying data from old to new cluster is the best
way forward. Thanks everyone for your input. </font><br><font size=2 face="Calibri"> </font><br><font size=3 face="Calibri"><b>From: </b><gpfsug-discuss-bounces@spectrumscale.org>
on behalf of Yuri L Volobuev <volobuev@us.ibm.com><b><br>Reply-To: </b>gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><b><br>Date: </b>Tuesday, October 11, 2016 at 12:22 PM<b><br>To: </b>gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><b><br>Subject: </b>Re: [gpfsug-discuss] Hardware refresh</font><br><font size=3 face="Times New Roman"> </font><p><font size=3 face="Times New Roman">This depends on the committed cluster
version level (minReleaseLevel) and file system format. Since NFSv2 is
an on-disk format change, older code wouldn't be able to understand what
it is, and thus if there's a possibility of a downlevel node looking at
the NSD, the NFSv1 format is going to be used. The code does NSDv1<->NSDv2
conversions under the covers as needed when adding an empty NSD to a file
system.<br><br>I'd strongly recommend getting a fresh start by formatting a new file system.
Many things have changed over the course of the last few years. In particular,
having a 4K-aligned file system can be a pretty big deal, depending on
what hardware one is going to deploy in the future, and this is something
that can't be bolted onto an existing file system. Having 4K inodes is
very handy for many reasons. New directory format and NSD format changes
are attractive, too. And disks generally tend to get larger with time,
and at some point you may want to add a disk to an existing storage pool
that's larger than the existing allocation map format allows. Obviously,
it's more hassle to migrate data to a new file system, as opposed to extending
an existing one. In a perfect world, GPFS would offer a conversion tool
that seamlessly and robustly converts old file systems, making them as
good as new, but in the real world such a tool doesn't exist. Getting a
clean slate by formatting a new file system every few years is a good long-term
investment of time, although it comes front-loaded with extra work.<br><br>yuri<br><br></font><img src=cid:_1_1196FEB41196F4B0006DC28885258049 alt="nactive hide details for Aaron Knister ---10/10/2016 04:45:31 PM---Can on" style="border:0px solid;"><font size=3 color=#424282 face="Times New Roman">Aaron
Knister ---10/10/2016 04:45:31 PM---Can one format NSDv2 NSDs and put them
in a filesystem with NSDv1 NSD's? -Aaron</font><font size=3 face="Times New Roman"><br></font><font size=2 color=#5f5f5f face="Times New Roman"><br>From: </font><font size=2 face="Times New Roman">Aaron Knister <aaron.s.knister@nasa.gov></font><font size=2 color=#5f5f5f face="Times New Roman"><br>To: </font><font size=2 face="Times New Roman"><gpfsug-discuss@spectrumscale.org>,
</font><font size=2 color=#5f5f5f face="Times New Roman"><br>Date: </font><font size=2 face="Times New Roman">10/10/2016 04:45 PM</font><font size=2 color=#5f5f5f face="Times New Roman"><br>Subject: </font><font size=2 face="Times New Roman">Re: [gpfsug-discuss]
Hardware refresh</font><font size=2 color=#5f5f5f face="Times New Roman"><br>Sent by: </font><font size=2 face="Times New Roman">gpfsug-discuss-bounces@spectrumscale.org</font><br><hr noshade><br><font size=3 face="Times New Roman"><br><br></font><font size=2 face="Courier New"><br>Can one format NSDv2 NSDs and put them in a filesystem with NSDv1 NSD's?<br><br>-Aaron<br><br>On 10/10/16 7:40 PM, Luis Bolinches wrote:<br>> Hi<br>><br>> Creating a new FS sounds like a best way to go. NSDv2 being a very
good<br>> reason to do so.<br>><br>> AFM for migrations is quite good, latest versions allows to use NSD<br>> protocol for mounts as well. Olaf did a great job explaining this<br>> scenario on the redbook chapter 6<br>><br>> </font><a href=http://www.redbooks.ibm.com/abstracts/sg248254.html?Open><font size=2 color=blue face="Courier New"><u>http://www.redbooks.ibm.com/abstracts/sg248254.html?Open</u></font></a><font size=2 face="Courier New"><br>><br>> --<br>> Cheers<br>><br>> On 10 Oct 2016, at 23.05, Buterbaugh, Kevin L<br>> <Kevin.Buterbaugh@Vanderbilt.Edu<br>> <</font><a href=mailto:Kevin.Buterbaugh@Vanderbilt.Edu><font size=2 color=blue face="Courier New"><u>mailto:Kevin.Buterbaugh@Vanderbilt.Edu</u></font></a><font size=2 face="Courier New">>>
wrote:<br>><br>>> Hi Mark,<br>>><br>>> The last time we did something like this was 2010 (we’re doing
rolling<br>>> refreshes now), so there are probably lots of better ways to do
this<br>>> than what we did, but we:<br>>><br>>> 1) set up the new hardware<br>>> 2) created new filesystems (so that we could make adjustments
we<br>>> wanted to make that can only be made at FS creation time)<br>>> 3) used rsync to make a 1st pass copy of everything<br>>> 4) coordinated a time with users / groups to do a 2nd rsync when
they<br>>> weren’t active<br>>> 5) used symbolic links during the transition (i.e. rm -rvf<br>>> /gpfs0/home/joeuser; ln -s /gpfs2/home/joeuser /gpfs0/home/joeuser)<br>>> 6) once everybody was migrated, updated the symlinks (i.e. /home<br>>> became a symlink to /gpfs2/home)<br>>><br>>> HTHAL…<br>>><br>>> Kevin<br>>><br>>>> On Oct 10, 2016, at 2:56 PM, Mark.Bush@siriuscom.com<br>>>> <</font><a href=mailto:Mark.Bush@siriuscom.com><font size=2 color=blue face="Courier New"><u>mailto:Mark.Bush@siriuscom.com</u></font></a><font size=2 face="Courier New">>
wrote:<br>>>><br>>>> Have a very old cluster built on IBM X3650’s and DS3500.
Need to<br>>>> refresh hardware. Any lessons learned in this process?
Is it<br>>>> easiest to just build new cluster and then use AFM? Add
to existing<br>>>> cluster then decommission nodes? What is the recommended
process for<br>>>> this?<br>>>><br>>>><br>>>> Mark<br>>>><br>>>> This message (including any attachments) is intended only
for the use<br>>>> of the individual or entity to which it is addressed and may
contain<br>>>> information that is non-public, proprietary, privileged,<br>>>> confidential, and exempt from disclosure under applicable
law. If you<br>>>> are not the intended recipient, you are hereby notified that
any use,<br>>>> dissemination, distribution, or copying of this communication
is<br>>>> strictly prohibited. This message may be viewed by parties
at Sirius<br>>>> Computer Solutions other than those named in the message header.
This<br>>>> message does not contain an official representation of Sirius<br>>>> Computer Solutions. If you have received this communication
in error,<br>>>> notify Sirius Computer Solutions immediately and (i) destroy
this<br>>>> message if a facsimile or (ii) delete this message immediately
if<br>>>> this is an electronic communication. Thank you.<br>>>><br>>>> Sirius Computer Solutions <</font><a href=http://www.siriuscom.com/><font size=2 color=blue face="Courier New"><u>http://www.siriuscom.com/</u></font></a><font size=2 face="Courier New">><br>>>> _______________________________________________<br>>>> gpfsug-discuss mailing list<br>>>> gpfsug-discuss at spectrumscale.org <</font><a href=http://spectrumscale.org/><font size=2 color=blue face="Courier New"><u>http://spectrumscale.org/</u></font></a><font size=2 face="Courier New">><br>>>> </font><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss"><font size=2 color=blue face="Courier New"><u>http://gpfsug.org/mailman/listinfo/gpfsug-discuss</u></font></a><font size=2 face="Courier New"><br>>><br>>> —<br>>> Kevin Buterbaugh - Senior System Administrator<br>>> Vanderbilt University - Advanced Computing Center for Research
and<br>>> Education<br>>> Kevin.Buterbaugh@vanderbilt.edu<br>>> <</font><a href=mailto:Kevin.Buterbaugh@vanderbilt.edu><font size=2 color=blue face="Courier New"><u>mailto:Kevin.Buterbaugh@vanderbilt.edu</u></font></a><font size=2 face="Courier New">>
- (615)875-9633<br>>><br>>><br>>><br>><br>> Ellei edellä ole toisin mainittu: / Unless stated otherwise above:<br>> Oy IBM Finland Ab<br>> PL 265, 00101 Helsinki, Finland<br>> Business ID, Y-tunnus: 0195876-3<br>> Registered in Finland<br>><br>><br>><br>> _______________________________________________<br>> gpfsug-discuss mailing list<br>> gpfsug-discuss at spectrumscale.org<br>> </font><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss"><font size=2 color=blue face="Courier New"><u>http://gpfsug.org/mailman/listinfo/gpfsug-discuss</u></font></a><font size=2 face="Courier New"><br>><br>_______________________________________________<br>gpfsug-discuss mailing list<br>gpfsug-discuss at spectrumscale.org</font><font size=2 color=blue face="Courier New"><u><br></u></font><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss"><font size=2 color=blue face="Courier New"><u>http://gpfsug.org/mailman/listinfo/gpfsug-discuss</u></font></a><font size=2 face="Courier New"><br></font><font size=3 face="Times New Roman"><br><br><br></font><p><font size=1 face="Cambria">This message (including any attachments)
is intended only for the use of the individual or entity to which it is
addressed and may contain information that is non-public, proprietary,
privileged, confidential, and exempt from disclosure under applicable law.
If you are not the intended recipient, you are hereby notified that any
use, dissemination, distribution, or copying of this communication is strictly
prohibited. This message may be viewed by parties at Sirius Computer Solutions
other than those named in the message header. This message does not contain
an official representation of Sirius Computer Solutions. If you have received
this communication in error, notify Sirius Computer Solutions immediately
and (i) destroy this message if a facsimile or (ii) delete this message
immediately if this is an electronic communication. Thank you. </font><p><a href=http://www.siriuscom.com/><font size=2 color=blue face="Calibri"><b><u>Sirius
Computer Solutions</u></b></font></a><font size=3> </font><tt><font size=2>_______________________________________________<br>gpfsug-discuss mailing list<br>gpfsug-discuss at spectrumscale.org<br></font></tt><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss"><tt><font size=2>http://gpfsug.org/mailman/listinfo/gpfsug-discuss</font></tt></a><tt><font size=2><br></font></tt><p><BR>