On Mon, Feb 10, 2014 at 01:28:38PM +0000, Frank Kingswood wrote: > Hi, > > I'm attempting to back up a btrfs subvolume with > > $ btrfs send /path/to/subvol | nc > > and the receiving end does > > $ nc -l | btrfs receive /path/to/volume > > This subvolume holds ~250 GB of data, about half full, and uses RAID1. > > Doing so runs out of file descriptors on the sending machine (having > over 100k files open) and eventually runs out of memory and gets > killed by the OOM killer. This sounds like a known bug, and I think it was fixed in 3.13. What kernel version are you using? Hugo. > What are the memory requirements of btrfs send? > This is the initial send so the entire volume must be transferred. > Are later send operations equally memory-intensive? > > Is it possible to do an incremental send, or send partial snapshots > and combine them later on? -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Everything simple is false. Everything which is --- complex is unusable.
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