Q1) If EC2 is terminated where Lucidity is installed, what will we do with EBS volume? Will it remain idle or terminated?
A1) No change has been made to this configuration. The system behaves as is.
Typically, when you choose to terminate an EC2 instance on AWS, the system will confirm if you want to delete any associated volumes with it; No modifications have been made to this configuration.
Q2) What is the Impact of the Lucidity Agent being down?
A2) The agent is quite reliable and hasn’t encountered a situation of failure. However, in the case of Agent failure, there is ‘No’ impact on your application’s functioning. Application will keep talking to the disk/volume as the Agent doesn’t come in the I/O path. The only functionality impacted is auto-scaling. Multiple fail-safe mechanisms are implemented:
Track & Fix - We get a minute-by-minute heartbeat from each agent installed. In case two consecutive heartbeats are missed, we raise internal tickets & proactively fix the agent. Typically, we always keep a sufficient buffer of 20-25% in disks which ensures that we fix the issue by the time disks are full.
Upgrade manually - In the worst-case scenario if Lucidity is not able to update the agent, customers can upgrade disks manually until the issue is resolved.
If you wish to manually restart the Lucidity Agent:
To stop–start the agent on Windows:
sc.exe stop autoscalerAgent
sc.exe start autoscalerAgent
sc.exe stop nwAgent
sc.exe start nwAgentTo stop–start the agent on Linux:
sudo systemctl restart autoscalerShutdownAgent.service
sudo systemctl restart autoscalerAgent.service
sudo systemctl restart nwAgent.serviceQ3) How will the Lucidity AutoScaler agent respond to a scenario where there is an addition of data during the buffer time of a shrink / expand operation?
A3) The algorithm has been designed to always keep extra storage capacity to accommodate data during the buffer time of expansion/shrink without any issues.
A minimum of 20-25 GB space is maintained to account for any sudden data surge.
Q4) What data is being collected by Lucidity agents? Does lucidity share the data collected with any third party?
A4) In accordance with the data privacy and security guidelines, Lucidity does not gather or distribute any customer information. The Agent only gathers disk utilization metrics such as disk size, number of disks, IOPS, latency, and throughput, which are crucial for the AutoScaler solution to give you a seamless No-ops experience.
Q5) Is there any latency introduced upon installing lucidity?
A5) No, there are no latency issues with lucidity operations as the Agent architecture is specifically designed to not be in the I/O path.
This means that the agent communicates directly with the file system without interfering with the I/O path used by your applications. In fact, there are features in our product pipeline that would improve the latency of your existing applications by 30-50%.
Q6) Can we customize the limits for utilization?
A6) Yes, It is customizable.
The algorithm has been designed to maintain 70-80% as ideal disk utilization. This can be modified based on the requirements.
Q7) Does lucidity auto-manage all disks or can we pick and choose the disks that need to be managed by Lucidity?
A7) As a customer, you have complete control to choose which disks you want to bring onto the Lucidity platform. You can select the disks according to your needs and preferences from the Lucidity dashboard.
Q8) Can agent upgrades be scheduled to run within a specific time window?
A8) Yes, in most cases, agent upgrades will be completed within the specified time window provided by the customer.
However, there are two exceptions where the upgrade may be deferred:
Ongoing operation: If a large shrink operation is in progress on the instance, it will be prioritized over the agent upgrade to ensure data consistency and operational stability.
Instance is powered off: If the instance is shut down during the upgrade window, the agent upgrade will automatically resume once the instance is back online.
We recommend ensuring the instance is running during the preferred upgrade window for best results.
Q9) How do I increase cloud quota?
A9) You can know more about quota limits and how to increase it by visiting the following links for AWS, Azure and GCP.