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Accepted
Harel
Asked: 2011-03-22 02:43:59 +0800 CST

How can I reclaim bytes from a nearly full, 850G mongodb partition?

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Woke up this morning to find out MongoDB grew to all available disk space for some reason. I cannot repair the db to compact it, as I have no space left. I can't even start postgres to remove an old database which would free up a few gigs more. I literally have zero free disk space.

I did delete a 9GB file but the space is not showing up at all when I "df -h".

I have to clear up space on the drive asap as its a production server and we're down. What to do?

hard-drive linux disk-space-utilization mongodb rm

2 Answers

  1. the space will not show up until all processes release the file. Try using lsof to see what's using the file.

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  2. Best Answer

    Although the answer provided is valid in many cases, in my scenario I ended up falling into the ext3 5% reserved root space. I could have recovered this space had I known about it at the time. I ended up using a USB drive as a repair path to mongodb reclaiming back 850GB.

    This is how to recover that ext3 5% should anyone be interested:

    http://www.andremiller.net/content/recovering-reserved-space-ext2-and-ext3-filesystems

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