## C++ version of the "Mark's bench" for Ceph

This tool issues random writes to each OSD separately to determine random write
performance of each specific OSD.

## Usage

```
# Create a non-replicated pool named bench
# PG number (16) should be sufficient for each OSD to get at least 1 PG
ceph osd pool create bench 16 16 replicated
ceph osd pool set bench size 1

# Benchmark all OSDs which have at least 1 PG in that pool
./ceph-bench bench osd

# Benchmark hosts (print average result per host)
./ceph-bench bench host

# Benchmark a specific OSD
./ceph-bench bench osd 1
```

## Building

```
git clone https://github.com/vitalif/ceph-bench

cd ceph-bench

apt-get install build-essential libradospp-dev libjsoncpp-dev libtcmalloc-minimal4

make
```

## See Also

* Golang version of the same benchmark: https://github.com/rumanzo/ceph-gobench
  (currently doesn't work with Ceph 16)
* Article about Ceph performance: https://yourcmc.ru/wiki/Ceph_performance
* Vitastor, a fast block SDS similar to Ceph RBD: https://vitastor.io/
  (can achieve ~7k or more T1Q1 write iops)

## Authors and License

Authors:
* Mark Korenberg (mark [at] ideco.ru)
* Vitaliy Filippov (vitalif [at] yourcmc.ru)

License:
* GNU GPL 3.0 or later (see [LICENSE](LICENSE))