The node.bandwidth.recovery.operator.factor.write setting in Elasticsearch controls the write bandwidth factor used during recovery operations. This setting helps manage the network bandwidth allocated for writing data during shard recovery processes.
- Default value: 1.0
- Possible values: Any positive float value
- Recommendation: Adjust based on network capacity and recovery requirements
This setting allows you to fine-tune the write bandwidth used during recovery operations. A value of 1.0 means 100% of the estimated bandwidth will be used, while a value of 0.5 would use 50% of the estimated bandwidth.
Usage Example
To change this setting using the cluster settings API:
PUT _cluster/settings
{
"transient": {
"node.bandwidth.recovery.operator.factor.write": 0.8
}
}
In this example, we're setting the write bandwidth factor to 0.8 (80% of the estimated bandwidth). This might be useful if you want to allocate more bandwidth for other operations or if you're experiencing network congestion during recovery processes.
Common Issues
- Setting the value too low can significantly slow down recovery operations.
- Setting the value too high might impact other network operations on the cluster.
Do's and Don'ts
- Do monitor network usage and adjust this setting accordingly.
- Do consider the impact on overall cluster performance when changing this value.
- Don't set this value extremely high without considering the impact on other network operations.
- Don't ignore this setting if you're experiencing slow recovery times or network congestion.
Frequently Asked Questions
Q: How does this setting affect recovery speed?
A: This setting directly impacts the amount of bandwidth used for writing data during recovery. A higher value can speed up recovery but may consume more network resources.
Q: Can changing this setting impact ongoing indexing operations?
A: Yes, if set too high, it might reduce available bandwidth for other operations, potentially slowing down indexing.
Q: Is it safe to change this setting on a production cluster?
A: Yes, but it should be done cautiously and monitored closely for any adverse effects on cluster performance.
Q: How does this setting interact with node.bandwidth.recovery.operator.factor?
A: While node.bandwidth.recovery.operator.factor affects overall recovery bandwidth, this setting specifically targets write operations during recovery.
Q: Should I adjust this setting if I have a high-speed network?
A: Even with a high-speed network, it's important to balance recovery speed with other operations. Start with the default and adjust if necessary based on monitoring and performance needs.
