Lines Matching +full:primary +full:- +full:device

2 .\" Copyright (c) 2015-2017 Alexander Motin <mav@FreeBSD.org>
35 .Bd -ragged -offset indent
36 .Cd "device ctl"
42 .Bd -literal -offset indent
51 .Bl -bullet -compact
53 Disk, CD-ROM and processor device emulation
76 All I/O handled in-kernel, no userland context switch overhead
83 .Bl -tag -width cfumass
102 Provides access for local user-level applications via
117 .Bl -tag -width ramdisk
131 .Bl -tag -width indent
134 .Bl -tag -offset indent -compact
145 Default is 0 -- no HA, 1 and 2 -- HA enabled at specified position.
148 .Bl -tag -offset indent -compact
150 Active/Standby -- primary node has backend access and processes requests,
153 Active/Active -- both nodes have backend access and process requests,
154 while secondary node synchronizes processing with primary one;
156 Active/Active -- primary node has backend access and processes requests,
157 while secondary node forwards all requests and data to primary one;
161 state; if configured but not established -- Transitioning state.
168 .Bl -tag -offset indent -compact
178 .Bl -tag -offset indent -compact
180 primary;
184 This role can be overridden on per-LUN basis using "ha_role" LUN option,
185 so that for one LUN one node is primary, while for another -- another.
186 Role change from primary to secondary for HA modes 0 and 2 closes backends,
187 the opposite change -- opens.
188 If there is no primary node (both nodes are secondary, or secondary node has
189 no connection to primary one), secondary node(s) report Transitioning state.
190 State with two primary nodes is illegal (split brain condition).
196 .Bl -tag -width indent