Orka Cluster 3.2 Scheduled Caching FAQs
isit the links below to download a version of the Orka CLI binary that matches your environment.
| FAQ | Answer |
|---|---|
| Does caching have an impact on running VMs? | Caching small images (16GB) may be unnoticeable in VMs with long-running builds (if a build takes 10 min, a cache operation of 1 min has hardly any impact) The more images are being cached, the bigger the impact on a running VM. They take longer to cache and consume more resources |
| How many cache operations can run at once? | Currently, a cache job requires 0.5 CPU to run. On a machine with 8 CPU available, it can run maximum of 16 jobs. Caching more images at the same time is faster than caching them sequentially. |
| Does caching have an impact on build performance? | Performance is impacted depending on the number of cache operations running. MacStadium recommends not running builds during caching unless: *The image actual size is small. *People have long running builds. *People are ok with a small performance drop in one of their builds. |
| OCI vs NFS caching - which one is better? | Pulling an image from a registry over the public internet is not as performant or reliable as pulling from the SAN in the same DC, which is why MacStadium recommends NFS. NFS cache operations are extremely consistent and predictable - running one operation on the same type of node under the same conditions provides the same result. |
| Does caching have an impact on the performance of other cache operations? | Yes. A VM running on a node with an active caching job has a noticeable increase in task execution time. This impact is proportional to the image size writing to cache. |
| Does caching have an impact on network, memory, or CPU performance? | Nodes with an active caching download impact a VM and its performance running processes including impacting network I/O operations. |
| Does caching have an impact on cluster performance? | The Orka scheduler can experience latency on the node member that has active caching operations. |
Updated 19 days ago