RSU implementation
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| MySQL patches by Codership |
Fix Released
|
Medium
|
Seppo Jaakola | ||
| 5.1 |
New
|
Undecided
|
Unassigned | ||
| 5.5 |
Fix Released
|
Medium
|
Seppo Jaakola | ||
Bug Description
Implement rolling schema upgrade support in mysql side.
Online schema upgrade (OSU) is a feature enabling schema changes while cluster is online. With this enhancement, the cluster will have two separate OSU methods:
* total order isolation (TOI)
* rolling schema upgrade (RSU)
A little bit of design:
1. A new option variable must be introduced to choose between TOI and RSU methods
2. DDL processing must switch between TOI and RSU methods
3. RSU method must call wsrep->desync() and wsrep->resync() before and after the DDL processing
4. RSU method should also set THD's wsrep_on to 0 during DDL phase, this is convenience for the caller
A sibling task: https:/
| Changed in codership-mysql: | |
| status: | New → In Progress |
| importance: | Undecided → Medium |
| assignee: | nobody → Seppo Jaakola (seppo-jaakola) |
| milestone: | none → 5.5.16-22.3 |
| description: | updated |
| Seppo Jaakola (seppo-jaakola) wrote | #1 |
Intermediate implementation is pushed in wsrep-5.5 change set: http://