Skip to content

Instantly share code, notes, and snippets.

@ringerc

ringerc/gist:d4a8fe97f5fd332d8b883d596d61e257

Created August 11, 2017 02:56
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save ringerc/d4a8fe97f5fd332d8b883d596d61e257 to your computer and use it in GitHub Desktop.
Save ringerc/d4a8fe97f5fd332d8b883d596d61e257 to your computer and use it in GitHub Desktop.
Download ZIP
Failover slots with streaming rep proto
Raw
gistfile1.txt
Phys rep Phys rep
using phys using
slot "B" phys slot "C"
+-------+ +--------+ +-------+
T | A <^--------+ B <---------+ C |
I | | | | | |
M +-------+ +--------+ +-------+
E | | |
| | | |CREATEs
| | | |logical slot X
v | | |("owned")
| | |as temp slot
| +<-----------------+
| |Creates upmirror |
| |slot "X" linked |
| |to phys slot "C" |
| |marked temp |
| <----------------+ |
|Creates upmirror | | <--------------------------+ +-----------------+
|slot "X" linked | | Attempt to decode from "X" | |
|to phys slot "B" | | | CLIENT |
|marked permanent | | +-------------------------> | |
+----------------> | | ERROR: slot X still being +-----------------+
| |Sees upmirror | created on master, not ready
| |slot "X" in |
| |list from "A", |
| |marks it |
| |permanent and |
| |copies state |
| +----------------> |
| | |Sees upmirror slot
| | |"X" on "B" got marked
| | |permanent (because it
| | |appears in B's slot
| | |listings),
| | |marks permanent on C.
| | |Copies state.
| | |
| | |Slot "X" now persistent
| | |and (when decoding on standby
| | |supported) can be used for decoding
| | |on standby.
+ + +
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment