Fast Smart Recovery
Details
| Detail name | Value |
|---|---|
| Changelog Number | 375 |
| Type | Improvement |
| Status | Resolved |
| Fix Versions | EXASOL 6.0.0 |
| Resolution Date | 2017-03-16 |
Improvement
The recovery mechanism has been significantly improved in order to reduce the amount of data that is:
- restored after recovering a failed component of a volume
- copied when moving a node or increasing the redundancy of a volume
Benefit
Reduce restoration times and shorten the duration of degradation (reduced redundancy)
This also improves the database performance by reducing I/O and network load.
Additionally the following operations are accelerated:
- moving a node
- increasing redundancy
- manually restoring a component
Details
mechanisms have been implemented or improved to:
- better track the actually modified data on a volume in order to reduce time for automatic recovery / data restoration
- analyse and report the actually used space within a volume to EXAStorage in order to further reduce the time for restoration, moving a node or increasing redundancy