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/LU-8974 Lustre <p>Currently attempts of creating ldisk file system with size &gt;256TB finished with message.<br/> "LDISKFS-fs does not support file systems greater than 256TB and can cause data corruption.Use "force_over_256tb" mount option to override."<br/> Before using "force_over_256tb" parameter in production systems lustre file system software should be analyzed to point possible large disks support issues. This issue is about research of some aspects of Lustre software. Finally patch that change "force_over_256tb" to "force_over_512tb" should be landed. This gives ability use ldiskfs partitions &lt;512tb without options.</p> LU-8974

Сhange force_over_256tb lustre mount option to force_over_512tb for ldiskfs

Improvement Minor Resolved Fixed Andreas Dilger Artem Blagodarenko Mon, 26 Dec 2016 07:10:18 +0000 Fri, 8 Nov 2019 03:06:46 +0000 Tue, 18 Apr 2017 17:44:56 +0000 Lustre 2.10.0 0 3 <p>Artem Blagodarenko (artem.blagodarenko@seagate.com) uploaded a new patch: <a href="https://review.whamcloud.com/24524" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/24524</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8974" title="Сhange force_over_256tb lustre mount option to force_over_512tb for ldiskfs" class="issue-link" data-issue-key="LU-8974"><del>LU-8974</del></a> osd-ldiskfs: increase supported ldiskfs fs size<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: b203e05a88d6c02b7f655598aacabfeb946aed66</p> <p>Some researched aspects </p> <p><b>META_BG</b><br/> (required)<br/> Without the option META_BG, for safety concerns, all block group descriptors copies are kept in the first block group. Given the default 128MiB(2^27 bytes) block group size and 64-byte group descriptors, ext4 can have at most 2^27/64 = 2^21 block groups. This limits the entire filesystem size to 2^21 ∗ 2^27 = 2^48 bytes or 256TiB.<br/> The solution to this problem is to use the metablock group feature (META_BG), which is already in ext3 for all 2.6 releases. Some issues found during testing<br/> <a href="https://jira.whamcloud.com/browse/LU-8443" title="Can&#39;t create Lustre FS with enabled meta_bg option" class="issue-link" data-issue-key="LU-8443"><del>LU-8443</del></a> "Can't create Lustre FS with enabled meta_bg option". Patch is landed.<br/> <a href="https://jira.whamcloud.com/browse/LU-8976" title="Apply patch &quot;libext2fs: fix maximum bg overhead calculation with meta_bg enabled&quot;" class="issue-link" data-issue-key="LU-8976"><del>LU-8976</del></a> "Cannot create filesystem with requested number of inodes while setting up superblock" Patch from upstream must be cherrypicked to solve the issue.</p> <p><b>large dir</b><br/> (useful in case of many files in the directory)<br/> <a href="https://jira.whamcloud.com/browse/LU-1365" title="Implement ldiskfs LARGEDIR support for e2fsprogs" class="issue-link" data-issue-key="LU-1365"><del>LU-1365</del></a> "Implement ldiskfs LARGEDIR support for e2fsprogs" Sending upstream.</p> <p><b>xattr external inode referance</b><br/> (tested, landing for regression testing)<br/> <a href="https://jira.whamcloud.com/browse/LU-8444" title="Add test for LU-7325 patch" class="issue-link" data-issue-key="LU-8444"><del>LU-8444</del></a> the patch from <a href="https://jira.whamcloud.com/browse/LU-7325" title="wrong integer type used for inode number in LargeEA patch" class="issue-link" data-issue-key="LU-7325"><del>LU-7325</del></a> fixes this issue: "Hitting "LDISKFS-fs error (device md66): ldiskfs_xattr_inode_iget: error while reading EA inode -2147483347" Inspection</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="https://review.whamcloud.com/24524/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/24524/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8974" title="Сhange force_over_256tb lustre mount option to force_over_512tb for ldiskfs" class="issue-link" data-issue-key="LU-8974"><del>LU-8974</del></a> osd-ldiskfs: increase supported ldiskfs fs size<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: cfa981f3bf06d602aee998e64d4758e13f48aab8</p> <p>Patch landed to 2.10.</p> <p>Artem Blagodarenko (c17828@cray.com) uploaded a new patch: <a href="https://review.whamcloud.com/36705" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/36705</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8974" title="Сhange force_over_256tb lustre mount option to force_over_512tb for ldiskfs" class="issue-link" data-issue-key="LU-8974"><del>LU-8974</del></a> osd-ldiskfs: increase supported size to 1024tb<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: c87bbaf9063494f702c0d0b5884d11dba483e306</p> Duplicate Related LU-8443 LU-1365 LU-12950 LU-8444 LU-8976 LU-7592 LU-8465 Development Rank 1|hzyz9j: Rank (Obsolete) 9223372036854775807