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author | Paolo Bonzini <pbonzini@redhat.com> | 2019-08-09 17:53:39 +0300 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-08-09 17:53:39 +0300 |
commit | 0e1c438c44dd9cde56effb44c5f1cfeda72e108d (patch) | |
tree | fa3492d4d7d8b7444e5d8ebe6c78210826333e4b /Documentation/admin-guide/blockdev/nbd.rst | |
parent | c096397c78f766db972f923433031f2dec01cae0 (diff) | |
parent | cdb2d3ee0436d74fa9092f2df46aaa6f9e03c969 (diff) | |
download | linux-0e1c438c44dd9cde56effb44c5f1cfeda72e108d.tar.xz |
Merge tag 'kvmarm-fixes-for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm fixes for 5.3
- A bunch of switch/case fall-through annotation, fixing one actual bug
- Fix PMU reset bug
- Add missing exception class debug strings
Diffstat (limited to 'Documentation/admin-guide/blockdev/nbd.rst')
-rw-r--r-- | Documentation/admin-guide/blockdev/nbd.rst | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/admin-guide/blockdev/nbd.rst b/Documentation/admin-guide/blockdev/nbd.rst new file mode 100644 index 000000000000..d78dfe559dcf --- /dev/null +++ b/Documentation/admin-guide/blockdev/nbd.rst @@ -0,0 +1,31 @@ +================================== +Network Block Device (TCP version) +================================== + +1) Overview +----------- + +What is it: With this compiled in the kernel (or as a module), Linux +can use a remote server as one of its block devices. So every time +the client computer wants to read, e.g., /dev/nb0, it sends a +request over TCP to the server, which will reply with the data read. +This can be used for stations with low disk space (or even diskless) +to borrow disk space from another computer. +Unlike NFS, it is possible to put any filesystem on it, etc. + +For more information, or to download the nbd-client and nbd-server +tools, go to http://nbd.sf.net/. + +The nbd kernel module need only be installed on the client +system, as the nbd-server is completely in userspace. In fact, +the nbd-server has been successfully ported to other operating +systems, including Windows. + +A) NBD parameters +----------------- + +max_part + Number of partitions per device (default: 0). + +nbds_max + Number of block devices that should be initialized (default: 16). |