WangChao created IOTDB-596:
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Summary: [Distributed] Better cache for remote schema
Key: IOTDB-596
URL: https://issues.apache.org/jira/browse/IOTDB-596
Project: Apache IoTDB
Issue Type: Improvement
Components: Core/Cluster
Reporter: WangChao
Each timeseries has its own sampling period. For the timeseries with short
sampling period, it should exist in cache for a long time. The LRU algorithm is
based on the access frequency to eliminate the timeseries.
Therefore, the following scenarios may exist:
A timeseries generates one data per second, and B timeseries generates one data
every 10 seconds. Maybe the 10th second, A will be eliminated from the cache.
Consider a better cache algorithm, for example:
Add sample period data to each time series. When the time sequence needs to be
eliminated, compare the sampling period, and leave the short time.
As for how to obtain the sampling period, a simple point can sample the time
interval between two accesses of the cache.
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