I've just uploaded the development version 1.11.12: http://download.libguestfs.org/nbdkit/1.11-development/ Please try it out because it's hopefully close to the next stable release, 1.12. Below are some preliminary release notes. If there's anything else that I've missed and should go into this version then let me know. Rich. ====================================================================== New linuxdisk plugin lets you create complete ext2, ext3 or ext4 filesystems in a GPT partitioned disk image, from a local directory. This can be attached to existing Linux VMs or used to create new ones from scratch. New ssh plugin which lets you turn any disk image on a remote Unix server accessible by ssh into an NBD source. New rate filter for bandwidth-limiting connections. Either single connections or the whole server can be bandwidth-limited, and the limit can be dynamically changed at runtime. New readahead filter improves performance when reading sequentially from plugins with a high request overhead like curl. Plugins can now be written in the Rust programming language. The old xz plugin has been removed. Use ‘nbdkit --filter=xz file file.xz’ as a replacement. NBD_CMD_BLOCK_STATUS has been implemented allowing clients to query which parts of the disk are allocated, holes or zeroes. Plugins and filters have been extended to supply this information in many cases. This required adding minimal support for NBD protocol Structured Replies, NBD_CMD_FLAG_REQ_ONE and NBD_CMD_FLAG_DF. (Thanks to Eric Blake for extensive help with this one.) The line "All rights reserved." was removed from the license with agreement from all contributors. Note this does not change the license. nbdkit_error errors are printed in red when writing to the terminal, making them much easier to see. nbdkit_parse_size rejects negative values, eg. ‘nbdkit memory size=-100’ (Nikolay Ivanets). The curl plugin now supports cookies, making it broadly feature equivalent to the qemu curl block driver. The partitioning plugin can now create MBR logical partitions. Previously it only supported 4 MBR primary partitions and if you wanted more than that you had to use GPT. The partition filter also supports MBR logical partitions. The python plugin creates plugins which are compatible with Python >= 3.7. Tests are now run under MALLOC_CHECK=1 and MALLOC_PERTURB_=<random>. This causes some tests to crash (silently) because of a shutdown race which needs to be fixed. Test shell scripts now have a generic ‘requires’ function to skip tests if features are not present. C99 type ‘bool’ is now used in most places where appropriate. The protocol and connections code in the server has been split up because the single file had grown very large. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top