1 ================================== 1 ==================================
2 Network Block Device (TCP version) 2 Network Block Device (TCP version)
3 ================================== 3 ==================================
4 4
5 1) Overview 5 1) Overview
6 ----------- 6 -----------
7 7
8 What is it: With this compiled in the kernel ( 8 What is it: With this compiled in the kernel (or as a module), Linux
9 can use a remote server as one of its block de 9 can use a remote server as one of its block devices. So every time
10 the client computer wants to read, e.g., /dev/ 10 the client computer wants to read, e.g., /dev/nb0, it sends a
11 request over TCP to the server, which will rep 11 request over TCP to the server, which will reply with the data read.
12 This can be used for stations with low disk sp 12 This can be used for stations with low disk space (or even diskless)
13 to borrow disk space from another computer. 13 to borrow disk space from another computer.
14 Unlike NFS, it is possible to put any filesyst 14 Unlike NFS, it is possible to put any filesystem on it, etc.
15 15
16 For more information, or to download the nbd-c 16 For more information, or to download the nbd-client and nbd-server
17 tools, go to https://github.com/NetworkBlockDe !! 17 tools, go to http://nbd.sf.net/.
18 18
19 The nbd kernel module need only be installed o 19 The nbd kernel module need only be installed on the client
20 system, as the nbd-server is completely in use 20 system, as the nbd-server is completely in userspace. In fact,
21 the nbd-server has been successfully ported to 21 the nbd-server has been successfully ported to other operating
22 systems, including Windows. 22 systems, including Windows.
23 23
24 A) NBD parameters 24 A) NBD parameters
25 ----------------- 25 -----------------
26 26
27 max_part 27 max_part
28 Number of partitions per device (defau 28 Number of partitions per device (default: 0).
29 29
30 nbds_max 30 nbds_max
31 Number of block devices that should be 31 Number of block devices that should be initialized (default: 16).
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