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<span class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Menlo-Regular; font-size: 11px;">Hello Everyone,</span>
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JLab's Scicomp is almost ready to switch Hall-B's Lustre filesystems at /volatile to new hardware, which should give us a *very* significant increase in disk space.</div>
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However, the proposed transition will not be completely transparent to users with existing data on /volatile. See below for details.</div>
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The earliest possible date for this is January 16, Thursday of this week. The next option would be next Tuesday, January 20, after the long weekend.</div>
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This transition ideally applies to all these, and everything they contain, in one shot:</div>
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/volatile/clas12</div>
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/volatile/hallb</div>
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<div class="">/volatile/clas</div>
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The proposed transition minimizes downtime and system overhead, but will *not* automatically replicate anyone's existing /volatile data to the new filesystem:</div>
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1. The old /volatile directories above will be renamed/remounted as /volatile-old (or a similar name), become *read-only*, and remain readable for ~one month (similar to our current lifetime on /volatile).</div>
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2. The new /volatile filesystem will replace the old one, with all quota-level directories and permissions replicated, but sub-directories left to us to recreate as needed.</div>
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3. We can then copy data from /volatile-old to /volatile if we want to, or leave it there (and keep reading it) until it is deleted in a ~month.</div>
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I'm not aware of any production accounts currently running long batch workflows using /volatile. It will be good to minimize this transition's impact (and get a huge increase in disk space), so please let me know if you have any considerations, concerns, etc
about this.</div>
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There will be a followup email with the final date and details ...</div>
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Regards,</div>
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Nathan</div>
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