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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
+```