[Libguestfs] Re: problem with the scp protocol when using nbdkit

I'm faced with the problem of creating a block device with the SCP protocol. For example, I write 2 commands: 1. In the first terminal nbdkit --unix /tmp/usb1.sock --verbose --readonly curl url=scp://10.199.30.16/ home/user/4Mfile user=user password=+/home/root/pass -D curl.verbose= 1 -f

2. In the second terminal nbd-client -t 30 -u /tmp/usb1.sock /dev/nbd1 -n Output log: nbdkit: curl[1]: debug: newstyle negotiation: flags: export 0x103 nbdkit: curl[1]: debug: replying to NBD_OPT_GO with NBD_REP_ACK nbdkit: curl[1]: debug: handshake complete, processing requests serially nbdkit: curl[1]: debug: curl: pread count=512 offset=0 nbdkit: curl[1]: debug: Found bundle for host 10.199.30.16: 0x75d0bbd0 [serially] nbdkit: curl[1]: debug: Re-using existing connection! (#0) with host 10.199.30.16 nbdkit: curl[1]: debug: Connected to 10.199.30.16 (10.199.30.16) port 22 (#0) nbdkit: curl[1]: debug: <data with size=16384> nbdkit: curl[1]: debug: <data with size=16384> ... nbdkit: curl[1]: debug: <data with size=16384> nbdkit: curl[1]: debug: Connection #0 to host 10.199.30.16 left intact nbdkit: curl[1]: debug: curl: pread count=512 offset=2560 nbdkit: curl[1]: debug: Found bundle for host 10.199.30.16: 0x75d0bbd0 [serially] nbdkit: curl[1]: debug: Re-using existing connection! (#0) with host 10.199.30.16 nbdkit: curl[1]: debug: Connected to 10.199.30.16 (10.199.30.16) port 22 (#0) nbdkit: curl[1]: debug: <data with size=16384> nbdkit: curl[1]: debug: <data with size=16384> nbdkit: curl[1]: debug: <data with size=16384> nbdkit: curl[1]: debug: <data with size=16384> nbdkit: curl[1]: debug: <data with size=16384> ... nbdkit: curl[1]: debug: <data with size=16384> nbdkit: curl[1]: debug: <data with size=16384> nbdkit: curl[1]: debug: <data with size=16384> nbdkit: curl[1]: debug: <data with size=16384> nbdkit: curl[1]: debug: <data with size=16384> nbdkit: curl[1]: debug: Connection #0 to host 10.199.30.16 left intact nbdkit: curl[1]: error: write reply: NBD_CMD_READ: Broken pipe nbdkit: curl[1]: debug: curl: finalize nbdkit: curl[1]: debug: curl: close The problem is that I cannot send a file larger than 2-3 megabytes. Not to mention that we want to send large images. I'm using the latest version of nbdkit 1.33.11. Such a breakdown only happens with STP, that is, FTP and other protocols can accept large files.

Please tell me if there are patches that solve this problem. Thanks, Nikita Pavlov.