From df122ae457bbd78d9c831dd5604a2251f131b964 Mon Sep 17 00:00:00 2001 From: Yujun Zhang Date: Thu, 22 Jun 2017 15:09:53 +0800 Subject: Initial draft for storage QPI JIRA: QTIP-255 Change-Id: I987de78941d1e3a200e5c326348af344ea8d9559 Signed-off-by: Yujun Zhang --- docs/proposal/storage-qpi.rst | 70 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 docs/proposal/storage-qpi.rst (limited to 'docs') diff --git a/docs/proposal/storage-qpi.rst b/docs/proposal/storage-qpi.rst new file mode 100644 index 00000000..af7c7954 --- /dev/null +++ b/docs/proposal/storage-qpi.rst @@ -0,0 +1,70 @@ +.. This work is licensed under a Creative Commons Attribution 4.0 International License. +.. http://creativecommons.org/licenses/by/4.0 +.. (c) 2017 ZTE Corp. + + +*********** +Storage QPI +*********** + +The storage QPI gives user an overall score for storage performance. + +The measurement is done by `StorPerf`_. + +.. _StorPerf: https://wiki.opnfv.org/display/storperf + +Baseline +======== + +Baseline is established by testing with a set of work loads: + +- `Queue depth`_ (1, 2, 8) +- `Block size`_ (2KB, 8KB, 16KB) +- `Read write`_ + - sequential read + - sequential write + - random read + - random write + - random mixed read write 70/30 + +.. _Queue depth: http://fio.readthedocs.io/en/latest/fio_man.html#cmdoption-arg-iodepth +.. _Block size: http://fio.readthedocs.io/en/latest/fio_man.html#cmdoption-arg-blocksize +.. _Read write: http://fio.readthedocs.io/en/latest/fio_man.html#cmdoption-arg-readwrite + +Metrics +======= + +- Throughput: data transfer rate +- IOPS: I/O operations per second +- Latency: response time + +Workload Scores +=============== + +For each test run, if an equivalent work load in baseline is available, a score will be calculated by comparing the +result to baseline. + +Section Scores +============== + ++-----------------+--------------------------------------------------------+-----------------------------------------+ +| Section | Detail | Indication | ++=================+========================================================+=========================================+ +| IOPS | Read write I/O Operation per second under steady state | Important for frequent storage access | +| | Workloads : random read/write | such as event sinks | ++-----------------+--------------------------------------------------------+-----------------------------------------+ +| Throughput | Read write data transfer rate under steady state | Important for high throughput services | +| | Workloads: sequential read/write, block size 16KB | such as video server | ++-----------------+--------------------------------------------------------+-----------------------------------------+ +| Latency | Average response latency under steady state | Important for real time applications | +| | Workloads: all | | ++-----------------+--------------------------------------------------------+-----------------------------------------+ + +Section score is the `geometric mean `_ of all +workload score. + +Storage QPI +=========== + +Storage QPI is the `weighted arithmetic mean `_ of all section +scores. -- cgit 1.2.3-korg