<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><br><div><br><blockquote type="cite"><div>Am 02.08.2023 um 13:42 schrieb Olaf Weiser <olaf.weiser@de.ibm.com>:</div><br class="Apple-interchange-newline"><div><meta charset="UTF-8"><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">Hallo Peter,<span class="Apple-converted-space"> </span><br></div><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><br></div><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><span class="x_elementToProof" style="font-family: Arial, Helvetica, sans-serif; font-size: 10pt;"><span class="ContentPasted0"><span class="x_ContentPasted0 ContentPasted0" style="background-color: rgb(255, 255, 255); display: inline !important;">[1]<span class="Apple-converted-space"> </span><i>[...] having a smaller inode size than the subblock size means</i></span><i> there's a big wastage on disk usage, with no performance benefit to doing so[...]<span class="Apple-converted-space"> </span><br></i></span></span></div><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><span class="x_elementToProof" style="font-family: Arial, Helvetica, sans-serif; font-size: 10pt;"><span class="ContentPasted0">in short - yes ðŸ˜‰<span class="Apple-converted-space"> </span><br></span></span></div><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><span class="x_elementToProof" style="font-family: Arial, Helvetica, sans-serif; font-size: 10pt;"><span class="ContentPasted0"><br></span></span></div></div></blockquote><div><br></div><div><br></div><div>The expectation that there is a waste in space seems to come from the idea that inodes are stored as individual files - which then can’t be smaller than a subblock. </div><div><br></div><div>Referring to:</div><div><br></div><div><div style="display: block;"><div style="-webkit-user-select: all; -webkit-user-drag: element; display: inline-block;" class="apple-rich-link" draggable="true" role="link" data-url="https://www.ibm.com/blogs/digitale-perspektive/wp-content/uploads/2020/03/04-SSSD20-SpectrumScale-Konzepte-Teil2-032020.pdf"><a style="border-radius:10px;font-family:-apple-system, Helvetica, Arial, sans-serif;display:block;-webkit-user-select:none;width:300px;user-select:none;-webkit-user-modify:read-only;user-modify:read-only;overflow:hidden;text-decoration:none;" class="lp-rich-link" rel="nofollow" href="https://www.ibm.com/blogs/digitale-perspektive/wp-content/uploads/2020/03/04-SSSD20-SpectrumScale-Konzepte-Teil2-032020.pdf" dir="ltr" role="button" draggable="false" width="300"><table style="table-layout:fixed;border-collapse:collapse;width:300px;background-color:#E5E6E9;font-family:-apple-system, Helvetica, Arial, sans-serif;" class="lp-rich-link-emailBaseTable" cellpadding="0" cellspacing="0" border="0" width="300"><tbody><tr><td vertical-align="center" align="center"><img style="width:300px;filter:brightness(0.97);height:168px;" width="300" height="168" draggable="false" class="lp-rich-link-mediaImage" alt="Vorschau.png" src="cid:83A1A7EC-CB97-4BA7-8073-53B6571703D9"></td></tr><tr><td vertical-align="center"><table bgcolor="#E5E6E9" cellpadding="0" cellspacing="0" width="300" style="font-family:-apple-system, Helvetica, Arial, sans-serif;table-layout:fixed;background-color:rgba(229, 230, 233, 1);" class="lp-rich-link-captionBar"><tbody><tr><td style="padding:8px 0px 8px 0px;" class="lp-rich-link-captionBar-textStackItem"><div style="max-width:100%;margin:0px 16px 0px 16px;overflow:hidden;" class="lp-rich-link-captionBar-textStack"><div style="word-wrap:break-word;font-weight:500;font-size:12px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-topCaption-leading"><a rel="nofollow" href="https://www.ibm.com/blogs/digitale-perspektive/wp-content/uploads/2020/03/04-SSSD20-SpectrumScale-Konzepte-Teil2-032020.pdf" style="text-decoration: none" draggable="false"><font color="#272727" style="color: rgba(0, 0, 0, 0.847059);">04-SSSD20-SpectrumScale-Konzepte-Teil2-032020</font></a></div><div style="word-wrap:break-word;font-weight:400;font-size:11px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-bottomCaption-leading"><a rel="nofollow" href="https://www.ibm.com/blogs/digitale-perspektive/wp-content/uploads/2020/03/04-SSSD20-SpectrumScale-Konzepte-Teil2-032020.pdf" style="text-decoration: none" draggable="false"><font color="#808080" style="color: rgba(0, 0, 0, 0.498039);">PDF-Dokument Â· 1,2 MB</font></a></div></div></td></tr></tbody></table></td></tr></tbody></table></a></div></div></div><div><br></div><div><br></div><div>Slide 21: â€žHeld in one invisible inode file…“</div><div><br></div><div>-> I would understand from that that 2kiB inodes are just ligned up in a single file and worst case you lose 2kiB because you don’t completely match your 4kiB inodes</div><div><br></div><div>Jan</div></div><br></body></html>