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Hi all,</div>
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With lctl del_ost the process of deleting an OST that you partially or fully added, but don't want any longer is nearly there. However, we have need for a more complete solution, such that a subsequent addition of an OST at the same index works without the
need to issue --replace with the mkfs command.</div>
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I've found that if I remount the MGT mount in a non-lustre mode (e.g., simply mount /dev/<dev> /mnt/mgt), I can locate the OST in question under CONFIGS/<name>. By deleting that file, the OST is accepted in the next time around with a simple non-replacement
mkfs invocation. However, this strikes me as very sketchy.</div>
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Two questions:</div>
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<div role="presentation" class="elementToProof">Why keep the configuration around for a node that is no longer in any of the llogs (post lctl del_ost)? Does it serve any purpose? Would it be better for that del_ost command to also remove that file?</div>
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<div role="presentation" class="elementToProof">If I do this and then remount the MGT "normally" and re-add an OST with the same index, are there issues I'm going to hit (ignoring in-memory stale context on the client-side alluded to in LU-16475)?</div>
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This is discussed thoroughly in <a href="https://jira.whamcloud.com/browse/LU-16475">
https://jira.whamcloud.com/browse/LU-16475</a> (which of course I found after my exploration), but the above two questions aren't completely addressed.</div>
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Thanks for any advice in advance!</div>
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ellis</div>
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