<div class="socmaildefaultfont" dir="ltr" style="font-family:Arial, Helvetica, sans-serif;font-size:10.5pt" ><div dir="ltr" >Stephen,</div>
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<div dir="ltr" >Sorry your right, I had to go back and look up what we were doing for metadata.</div>
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<div dir="ltr" >but we ended up with 1MB block for metadata and 8MB for data and a 32k subblock based on the 1MB metadata block size, effectively a 256k subblock for the Data </div>
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<div dir="ltr" ><div class="socmaildefaultfont" dir="ltr" style="font-family:Arial;font-size:10.5pt" ><div class="socmaildefaultfont" dir="ltr" style="font-family:Arial;font-size:10.5pt" ><div class="socmaildefaultfont" dir="ltr" style="font-family:Arial;font-size:10.5pt" ><div dir="ltr" style="margin-top: 20px;" ><div style="font-size: 12pt; font-weight: bold; font-family: sans-serif; color: #7C7C5F;" >Andrew Beattie</div>
<div style="font-size: 10pt; font-weight: bold; font-family: sans-serif;" >Software Defined Storage - IT Specialist</div>
<div style="font-size: 8pt; font-family: sans-serif; margin-top: 10px;" ><div><span style="font-weight: bold; color: #336699;" >Phone: </span>614-2133-7927</div>
<div><span style="font-weight: bold; color: #336699;" >E-mail: </span><a href="mailto:abeattie@au1.ibm.com" style="color: #555">abeattie@au1.ibm.com</a></div></div></div></div></div></div></div>
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<blockquote data-history-content-modified="1" dir="ltr" style="border-left:solid #aaaaaa 2px; margin-left:5px; padding-left:5px; direction:ltr; margin-right:0px" >----- Original message -----<br>From: Stephen Ulmer <ulmer@ulmer.org><br>Sent by: gpfsug-discuss-bounces@spectrumscale.org<br>To: gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>Cc:<br>Subject: Re: [gpfsug-discuss] Sub-block size not quite as expected on GPFS 5 filesystem?<br>Date: Thu, Aug 2, 2018 11:00 AM<br> <br><!--Notes ACF
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<blockquote type="cite" ><div>On Aug 1, 2018, at 8:11 PM, Andrew Beattie <<a href="mailto:abeattie@au1.ibm.com" target="_blank">abeattie@au1.ibm.com</a>> wrote:</div>
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<blockquote type="cite" ><div><div dir="ltr" style="font-family:Arial, Helvetica, sans-serif;font-size:10.5pt" ><div dir="ltr" > </div>
<div dir="ltr" >which is probably why 32k sub block was the default for so many years ....</div></div></div></blockquote></div></div>
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<div>I may not be remembering correctly, but I thought the default block size was 256k, and the sub-block size was always fixed at 1/32nd of the block size \u2014 which only yields 32k sub-blocks for a 1MB block size.
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<div>I also think there used to be something special about a 16k block size\u2026 but I haven\u2019t slept well in about a week, so I might just be losing it.</div>
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<div><div>-- <br>Stephen<br> </div></div></div></div>
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