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# ceph-gobench
ceph-gobench is benchmark for ceph which allows you to measure the speed/iops of each osd.
- [ceph-gobench](#ceph-gobench)
- [Feature](#user-content-feature)
- [Quickstart](#user-content-quickstart)
- [How it works](#user-content-how-it-works)
- [Example](#user-content-example)
Feature
--------------
- Static build
- Multithreading
- Parallel mode
- Custom parametersh such as block size, object size, test duration
- Credentials support
Quickstart
--------------
1. Build or download latest release
2. Create pool with size=1 min_size=1 (default pool name "bench")
3. Use
```
Usage of ./ceph-gobench:
-c, --config (= "/etc/ceph/ceph.conf")
Ceph config
-d, --duration (= 30s)
Time limit for each test in seconds
--define (= "")
Define specifically osd or host. osd.X or ceph-host-X
-k, --keyring (= "/etc/ceph/ceph.client.admin.keyring")
Ceph user keyring
-n, --cluster (= "ceph")
Ceph cluster name
-o, --objectsize (= "4M")
Object size in format KB = K = KiB = 1024 MB = M = MiB = 1024 * K GB = G = GiB = 1024 * M TB = T = TiB = 1024 * G
-p, --pool (= "bench")
Ceph pool
--parallel (= false)
Do test all osd in parallel mode
-s, --blocksize (= "4K")
Block size in format KB = K = KiB = 1024 MB = M = MiB = 1024 * K GB = G = GiB = 1024 * M TB = T = TiB = 1024 * G
-t, --threads (= 1)
Threads count on each osd
-u, --user (= "client.admin")
Ceph user (cephx)
```
How it works
--------------
In order to measure the performance of a specific OSD, you must create a pool with a size/min_size 1.
Benchmark creates 16 objects of size defined with parameter objectsize, create threads that's will work parallel and write random buffer to aligned to
block size offset with measuring write time. According to the received data builds a report.
Tests run by one if not defined parameter --parallel.
You can also define specifix osd or host for test.
Example
--------------
```
[root@host-1]# ./ceph-gobench -d 10s -p testpool --define osd.61
2019/02/28 18:26:19 Bench result for osd.61
osdname osd.61 ceph_release/version mimic/13.2.2 cpu Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz
default_device_class ssd devices dm-19,dm-24,sdv distro_description CentOS Linux 7 (Core)
front_addr 10.0.0.1:6831 hostname host-1 journal_rotational 0
kernel_version 3.10.0-957.1.3.el7.x86_64 mem_swap_kb 0 mem_total_kb 263921472
osd_data /var/lib/ceph/osd/ceph-61 osd_objectstore bluestore rotational 0
Avg iops: 1410 Avg speed: 5.510 MB/s Total writes count: 14066 Total writes (MB): 54
[0.4-0.5) ms: [ ] Count: 63 Total written: 0.246 MB
[0.5-0.6) ms: [########## ] Count: 2830 Total written: 11.055 MB
[0.6-0.7) ms: [############# ] Count: 3857 Total written: 15.066 MB
[0.7-0.8) ms: [################ ] Count: 4578 Total written: 17.883 MB
[0.8-0.9) ms: [####### ] Count: 2082 Total written: 8.133 MB
[0.9-1.0) ms: [# ] Count: 391 Total written: 1.527 MB
[1.0-1.1) ms: [ ] Count: 255 Total written: 0.996 MB
[2.0-3.0) ms: [ ] Count: 8 Total written: 0.031 MB
[3.0-4.0) ms: [ ] Count: 1 Total written: 0.004 MB
[4.0-5.0) ms: [ ] Count: 1 Total written: 0.004 MB
```