https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LUDOC-284 Lustre Documentation <p>What is the maximum OST size using ext4 filesystems in a supported installation?</p> LUDOC-284

ext4 OST maximum size

Question/Request Minor Resolved Fixed Bob Glossman Andreas Dilger Thu, 30 Apr 2015 15:06:59 +0000 Tue, 23 Feb 2016 17:52:32 +0000 Tue, 23 Feb 2016 17:52:12 +0000 0 6 <p>Bob</p> <p>Could you please point to where this information is available?</p> <p>Thanks</p> <p>Peter</p> <p>This is documented in the Lustre manual: <a href="https://build.hpdd.intel.com/job/lustre-manual/lastSuccessfulBuild/artifact/lustre_manual.xhtml#understandinglustre.tab1" class="external-link" target="_blank" rel="nofollow noopener">https://build.hpdd.intel.com/job/lustre-manual/lastSuccessfulBuild/artifact/lustre_manual.xhtml#understandinglustre.tab1</a></p> <p>Table entries for OSS Scalability:</p> <p>Current Practical range: 128TB per OST<br/> Tested in Production: 16TB per OST</p> <p>This is a bit outdated, and could stand to be updated in the manual. We have many sites using OSTs in the 24TB (3TB * 8+2 RAID-6) to 32TB (4TB * 8+2 RAID-6) range. There aren't expected to be any significant issues with 5 or 6TB drives (the big hurdle was at 16TB when exceeding 2^32 blocks), though SMR HDDs may cause performance issues for small file workloads as ext4 has not really been optimized for that technology yet.</p> <p>I'm going to move this over to an LUDOC ticket to update the manual.</p> <p>Andreas Dilger (andreas.dilger@intel.com) uploaded a new patch: <a href="http://review.whamcloud.com/15106" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/15106</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LUDOC-284" title="ext4 OST maximum size" class="issue-link" data-issue-key="LUDOC-284"><del>LUDOC-284</del></a> misc: update known filesystem limits<br/> Project: doc/manual<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 077a6426658898def883e25be144c2b154e4f68c</p> <p>Andreas Dilger (andreas.dilger@intel.com) merged in patch <a href="http://review.whamcloud.com/15106/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/15106/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LUDOC-284" title="ext4 OST maximum size" class="issue-link" data-issue-key="LUDOC-284"><del>LUDOC-284</del></a> misc: update known filesystem limits<br/> Project: doc/manual<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 416cd95897b3748b7e535fb2119499f895d5f923</p> Gantt End to End LUDOC-303 Development Rank 1|hzxc8v: Rank (Obsolete) 9223372036854775807