https://wiki.anunna.wur.nl/index.php?action=history&feed=atom&title=Backup_Policy 2026-06-19T01:25:00Z Revision history for this page on the wiki MediaWiki 1.45.3 https://wiki.anunna.wur.nl/index.php?title=Backup_Policy&diff=2807&oldid=prev 2026-06-18T11:43:27Z

<p>IA migration §6: split/synthesize Filesystems backup info into Backup Policy (via create-page on MediaWiki MCP Server)</p> <p><b>New page</b></p><div>Different storage areas on Anunna come with very different backup guarantees. Knowing which is which is essential: some areas are never backed up, and data lost there cannot be recovered. This page summarises the situation; the page for each storage area gives more context.<br /> <br /> {| class=&quot;wikitable&quot;<br /> |-<br /> ! Storage !! Backed up? !! Notes<br /> |-<br /> | [[Home Directory|/home]] || Yes — to tape, restorable from roughly a week of history. || Good for configuration files and small results you can&#039;t afford to lose.<br /> |-<br /> | [[Compute Storage|/lustre/nobackup]] || No. || The default Lustre area; cheaper, but lost data cannot be recovered. Keep your own copies of anything important.<br /> |-<br /> | [[Compute Storage|/lustre/backup]] || Yes — a second copy on a separate machine. || A disaster-recovery copy, not a versioned backup. It may help revert a mistake if you report it very quickly, but there is no guarantee.<br /> |-<br /> | [[Compute Storage|/lustre/scratch]] || No. || Temporary area; files may be purged automatically (typically after 30 days).<br /> |-<br /> | [[Archival Storage|/archive]] || Yes — to tape, restorable from roughly a week of history (same schedule as /home). || Warm storage on the login nodes, for WUR users.<br /> |}<br /> <br /> == Recommendations ==<br /> <br /> * Treat &lt;code&gt;/lustre/nobackup&lt;/code&gt; and &lt;code&gt;/lustre/scratch&lt;/code&gt; as expendable. Anything you cannot regenerate should also live somewhere that is backed up, or be archived to tape — see [[Archival Storage]].<br /> * A &quot;backup&quot; tier protects against hardware disaster, not against your own mistakes. If you delete something by accident, report it immediately; recovery is best-effort.<br /> <br /> == See also ==<br /> * [[Storage Systems Overview]]<br /> * [[Home Directory]]<br /> * [[Compute Storage]]<br /> * [[Archival Storage]]<br /> * [[Quotas]]</div>

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