﻿/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

namespace Apache.Ignite.Core.Configuration
{
    /// <summary>
    /// Defines checkpoint pages order on disk.
    /// </summary>
    public enum CheckpointWriteOrder
    {
        /// <summary>
        /// Pages are written in order provided by checkpoint pages collection iterator
        /// (which is basically a hashtable).
        /// </summary>
        Random,

        /// <summary>
        /// All checkpoint pages are collected into single list and sorted by page index.
        /// Provides almost sequential disk writes, which can be much faster on some SSD models.
        /// </summary>
        Sequential
    }
}