How to use "perform_blobstore_benchmarks" Blobstore Benchmark Utility in Tanzu Application Service for VMs

Products

• VMware Tanzu Application Service for VMs

Issue/Introduction

If you suspect your blobstore is not performing adequately, we recommend you run the following benchmarking utility in Tanzu Application Service for VMs (TAS for VMs):

bosh -d <cf-deployment> ssh cloud_controller/0 -c "sudo /var/vcap/jobs/cloud_controller_ng/bin/perform_blobstore_benchmarks"

Replacing "<cf-deployment>" with your environments TAS deployment name.

This utility runs a small series of performance experiments that emulate the load that a Cloud Controller (CC) might put on a blobstore.

 

Environment

Product Version: 2.10

Resolution

The  perform_blobstore_benchmarks utility runs several experiments to emulate the load that a Cloud Controller (CC) might put on a blobstore. These experiments are defined below:
 

Experiment	Explanation
Resource match	Resource match calls actual CC resource matching code against 64Mb of bogus application code. Resource matching is a process where CC compares package contents by asking the blobstore about the existence of each package file using its checksum.
Resource match	Uploads and then downloads a 64Mb zipfile of the aforementioned application code.
Buildpack download	Uploads and then downloads a 64Mb zipfile of the aforementioned application code.
Droplet upload and download	Uploads and then downloads the 64Mb zipfile as a droplet.
Big droplet upload and download	Uploads and then downloads a 496Mb zipfile as a droplet.

 

Example

The following is output from running the perform_blobstore_benchmarks utility against a local, virtualized, singleton-blobstore backed by nginx and WebDAV:

resource match timing: 1217.462632979732ms
package upload timing: 13.919375953264534ms
package download timing: 9.604769991710782ms
downloaded 20 buildpacks, total 89514967 bytes read
buildpack download timing: 1801.0983020067215ms
droplet upload timing: 7.320249045733362ms
droplet download timing: 2.5244889548048377ms
big droplet upload timing: 2160.5330359889194ms
big droplet download timing: 3950.6868550088257ms

Additional Information

https://github.com/cloudfoundry/capi-release/blob/develop/docs/blobstore-benchmarking.md