本文整理汇总了Python中pyrrd.rrd.RRD.fetch方法的典型用法代码示例。如果您正苦于以下问题：Python RRD.fetch方法的具体用法？Python RRD.fetch怎么用？Python RRD.fetch使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类pyrrd.rrd.RRD的用法示例。
在下文中一共展示了RRD.fetch方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: load_rrd
# 需要导入模块: from pyrrd.rrd import RRD [as 别名]
# 或者: from pyrrd.rrd.RRD import fetch [as 别名]
def load_rrd(cls, filepath, options, default_options):
take_param = lambda k: (k, options[k]
if k in options else default_options.get(k))
kargs = dict(map(take_param, ['start', 'end', 'resolution', 'cf']))
rrd = RRD(filepath, mode='r', backend=bindings)
rrd_data = rrd.fetch(**kargs)
return rrd_data.get('42')示例2: data
# 需要导入模块: from pyrrd.rrd import RRD [as 别名]
# 或者: from pyrrd.rrd.RRD import fetch [as 别名]
def data(req, rrd, ds, rra):
if os.path.isfile(rrdPath+rrd):
rrd = RRD(rrdPath+rrd, mode='r')
info = rrd.getData()
step = info[rra]['step']
start = info['lastupdate'] - info[rra]['rows']*step
data = rrd.fetch(resolution=step, start=start, end=info['lastupdate'])
return HttpResponse(simplejson.dumps(data))示例3: render_GET
# 需要导入模块: from pyrrd.rrd import RRD [as 别名]
# 或者: from pyrrd.rrd.RRD import fetch [as 别名]
def render_GET(self, request):
self.request = request
type = request.args["type"][0]
period = request.args["period"][0]
history_id = request.args["history_id"][0]
if type == "gauge":
rrd = RRD("history/%s.rrd" % history_id)
result = rrd.fetch(resolution=60, start=period, end='now')
clockfix = (datetime.datetime.now().hour - datetime.datetime.utcnow().hour) * 3600
series = [((ts + clockfix) * 1000, val) for ts, val in result["data"]]
return json.dumps(series)示例4: fetch
# 需要导入模块: from pyrrd.rrd import RRD [as 别名]
# 或者: from pyrrd.rrd.RRD import fetch [as 别名]
def fetch(self, start=None, end=None, resolution=None):
"""
Fetch data from the RRD database.
"""
rrd = RRD("history/108732.rrd")
print rrd.fetch(resolution=300, start='-1h', end=self.epoch_now()) 示例5: RRDManip
# 需要导入模块: from pyrrd.rrd import RRD [as 别名]
# 或者: from pyrrd.rrd.RRD import fetch [as 别名]
class RRDManip(object):
def __init__(self, filename, step=None,
dataSources=None, roundRobinArchives=None):
"""
实例化 RRDManip 类对象。
:param filename: the name of the RRD you to manipulative
:param dataSources: 相关的 data Source 队列
:param roundRobinArchives: 相关的 rra 队列
"""
if not isinstance(dataSources, list) and \
not isinstance(dataSources, tuple):
dataSources = [dataSources]
if not isinstance(roundRobinArchives, list) and \
not isinstance(roundRobinArchives, tuple):
roundRobinArchives = [roundRobinArchives]
self.dataSources = dataSources
self.roundRobinArchives = roundRobinArchives
self.filename = filename
self.step = step
self.rrd = None
def ensure_rrd(self):
"""
Ensures that an RRD file is created.
"""
if os.path.isfile(self.filename):
# the rrd file alread exist
self.rrd = RRD(self.filename)
else:
self.create_rrd()
def create_rrd(self):
"""
Creates an RRD file.
"""
dataSources = [DataSource(**ds) for ds in self.dataSources]
roundRobinArchives = [RRA(**rra) for rra in self.roundRobinArchives]
# start 时间设定为当前时间的一天前，86400 即一天内包含的秒数
past_one_day = int(time.time()) - 86400
self.rrd = RRD(self.filename, start=past_one_day, step=self.step,
ds=dataSources, rra=roundRobinArchives)
self.rrd.create()
def update(self, timestamp, values):
"""
Feeds data values into an RRD.
"""
timestamp = int(timestamp)
if not isinstance(values, list) and not isinstance(values, tuple):
values = [values]
self.rrd.bufferValue(timestamp, *values)
try:
self.rrd.update()
except:
# 防止 脏数据 污染 update vslues
self.rrd.values = []
def fetch(self, cf='AVERAGE', resolution=None, start=None, end=None, returnStyle="ds"):
"""
Fetch data values from an RRD.
:param returnStyle: 指定返回的数据格式，包括有'ds' 和 'time'
"""
return self.rrd.fetch(cf, resolution, start, end, returnStyle)