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<div>Not talking about ESS specifically, but It’s not possible to change the block size of an existing file system – you are pretty much stuck with file copy. Something I wish IBM would address, I’d love to change the block size of some of my file system too.</div>
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<font face="Helvetica">Bob Oesterlin<br>
Sr Storage Engineer, Nuance HPC Grid<br>
507-269-0413</font></div>
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<span style="font-weight:bold">From: </span><<a href="mailto:gpfsug-discuss-bounces@spectrumscale.org">gpfsug-discuss-bounces@spectrumscale.org</a>> on behalf of Damir Krstic <<a href="mailto:damir.krstic@gmail.com">damir.krstic@gmail.com</a>><br>
<span style="font-weight:bold">Reply-To: </span>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@spectrumscale.org">gpfsug-discuss@spectrumscale.org</a>><br>
<span style="font-weight:bold">Date: </span>Friday, January 29, 2016 at 1:31 PM<br>
<span style="font-weight:bold">To: </span>gpfsug main discussion list <<a href="mailto:gpfsug-discuss@spectrumscale.org">gpfsug-discuss@spectrumscale.org</a>><br>
<span style="font-weight:bold">Subject: </span>[gpfsug-discuss] migrating data from GPFS3.5 to ESS appliance (GPFS4.1)<br>
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<span style="color: rgb(0, 0, 0); font-family: -webkit-standard; font-size: medium; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; display: inline !important; float: none;">We
were planning of adding ESS to our existing GPFS cluster and adding its disks and then deleting our old disks and having the data migrated this way. However, our existing block size on our projects filesystem is 1M and in order to extract as much performance
out of ESS we would like its filesystem created with larger block size. Besides rsync do you have any suggestions of how to do this without downtime and in fastest way possible? </span></span>
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