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.
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?
Thanks,
Frank
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