iops简介
iops主要用在数据方面,这个指标是数据库性能评定的一个重要参考,iops的是每秒进行读写(I/O)操作的次数,主要看随机访问的性能,一般为了iops增高都要依靠磁盘阵列,实际线上的数据库基本都是raid10的配置,raid5在实际生产环境中如果压力上来是抗不住的,当然也要开具体业务压力情况,如果是用物理机就要看iops在实际中能跑到多少值,现在云也普遍了,如果你用的RDS云数据库,这个iops是可以根据业务情况自己选择的,基本是个参数,可以按需进行修改,当然数值越大费用越高
python获得系统iops代码如下:
#!/usr/bin/python
import os, time, math
run_tests = 3
devices = os.listdir('/sys/block/')
check_devices = []
reads = {}
writes = {}
for dev in devices:
if dev.startswith('md') or dev.startswith('sd') or dev.startswith('hd'):
check_devices.append(dev)
reads[dev] = []
writes[dev] = []
check_devices = sorted(check_devices)
for t in range(run_tests + 1):
for dev in check_devices:
file_data = open('/sys/block/%s/stat' % dev).readline().strip().split(' ')
clean = []
for num in file_data:
if num != '':
clean.append(int(num))
reads[dev].append(clean[0])
writes[dev].append(clean[4])
print reads[dev]
print writes[dev]
time.sleep(1)
print "Device Read Write"
print "--------------------------------------"
for dev in check_devices:
clean_reads = []
reads[dev].reverse()
for test, result in enumerate(reads[dev]):
if test > 0:
clean_reads.append(float(reads[dev][test - 1] - result))
rops = int(math.ceil(sum(clean_reads) / len(clean_reads)))
clean_writes = []
writes[dev].reverse()
for test, result in enumerate(writes[dev]):
if test > 0:
clean_writes.append(float(writes[dev][test - 1] - result))
wops = int(math.ceil(sum(clean_writes) / len(clean_writes)))
print "%s %s %s" % (dev.ljust(13), repr(rops).ljust(11), repr(wops))
总结
以上就是Python获得系统iops的全部内容,希望这篇文章对大家学习和使用python能有一定的帮助,如果有疑问大家可以留言交流。