com.epam.deltix.qsrv.hf.tickdb.pub.DataCacheOptions Maven / Gradle / Ivy
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/*
* Copyright 2023 EPAM Systems, Inc
*
* See the NOTICE file distributed with this work for additional information
* regarding copyright ownership. Licensed under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.epam.deltix.qsrv.hf.tickdb.pub;
import com.epam.deltix.util.lang.Util;
/**
* Timebase RAM Disk options.
*/
public class DataCacheOptions {
public static final long DEFAULT_CACHE_SIZE = 100*1024*1024;
public int maxNumOpenFiles = Util.getIntSystemProperty("TimeBase.dataCache.maxOpenFiles", Integer.MAX_VALUE, 100, Integer.MAX_VALUE);
public long cacheSize = Util.getLongSystemProperty("TimeBase.dataCache.size", DEFAULT_CACHE_SIZE);
public double preallocateRatio = 0;
public long shutdownTimeout = Long.MAX_VALUE;
public FSOptions fs = new FSOptions(); // File-System related options
public DataCacheOptions() {
}
public DataCacheOptions(int maxNumOpenFiles, long cacheSize) {
this(maxNumOpenFiles, cacheSize, 0);
}
public DataCacheOptions(int maxNumOpenedFiles, long cacheSize, double preallocateRatio) {
this.maxNumOpenFiles = maxNumOpenedFiles;
this.cacheSize = cacheSize;
this.preallocateRatio = preallocateRatio;
}
public long getInitialCacheSize() {
return (long) (cacheSize * preallocateRatio);
}
}