<div dir="ltr"><div>Hi Micheal,</div><div><br></div><div>With 1K inodes you won't have space to accommodate new features, IIRC the current minimal limit on modern lustre is 2K now. If you're running out of MDT space you might consider DNE and multiple MDT's to accommodate that larger name space.</div><div><br></div><div>-cf</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Oct 2, 2019 at 1:54 PM Hebenstreit, Michael <<a href="mailto:michael.hebenstreit@intel.com">michael.hebenstreit@intel.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><a href="http://wiki.lustre.org/Lustre_Tuning#Number_of_Inodes_for_MDS" rel="noreferrer" target="_blank">http://wiki.lustre.org/Lustre_Tuning#Number_of_Inodes_for_MDS</a><br>
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and I'd like to use --mkfsoptions='-i 1024' to have more inodes in the MDT. We already run out of inodes on that FS (probably due to an ZFS bug in early IEEL version) - so I'd like to increase #inodes if possible<br>
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-----Original Message-----<br>
From: Mohr Jr, Richard Frank <<a href="mailto:rmohr@utk.edu" target="_blank">rmohr@utk.edu</a>> <br>
Sent: Wednesday, October 02, 2019 13:39<br>
To: Hebenstreit, Michael <<a href="mailto:michael.hebenstreit@intel.com" target="_blank">michael.hebenstreit@intel.com</a>><br>
Cc: <a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.org</a><br>
Subject: Re: [lustre-discuss] changing inode size on MDT<br>
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> On Oct 2, 2019, at 1:08 PM, Hebenstreit, Michael <<a href="mailto:michael.hebenstreit@intel.com" target="_blank">michael.hebenstreit@intel.com</a>> wrote:<br>
> <br>
> Could anyone point out to me what the downside of having an inode size of 1k on the MDT would be (compared to the 4k default)?<br>
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Are you talking about the inode size, or the \u201c-i\u201d option to mkfs.lustre (which actually controls the ratio of inodes to free space)?<br>
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\u2014Rick<br>
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