Intro

The reference to these commands is from Sébastien Han Blog Post “Ceph: validate that the RBD cache is active” and the rbd man Page. For more posts about Ceph, take a look at Sébastien Han Blog.

Requisite - RBD image for running the Benchmarks

To be able to run a rbd benchmark, you need to create an image. The command to create an image for this would be:

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$ RBD_IMAGE_NAME="bench1"
$ rbd create --size=10G $RBD_IMAGE_NAME

rbd bench

Flags

Takes normal rbd command flags like:

The following flags are for the benchmark configuration:

Benchmarks

Write Benchmark

For sequential write benchmark:

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$ rbd -p replicapool bench $RBD_IMAGE_NAME --io-type write --io-size 8192 --io-threads 256 --io-total 10G --io-pattern seq

Read Benchmark

For sequential read benchmark:

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$ rbd -p replicapool bench $RBD_IMAGE_NAME --io-type read --io-size 8192 --io-threads 256 --io-total 10G --io-pattern seq

Notes

Have Fun!