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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.

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/*
* 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
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package org.apache.cassandra.utils;

import java.nio.ByteOrder;
import java.util.Collections;
import java.util.Set;

import com.google.common.collect.Sets;

import static org.apache.cassandra.config.CassandraRelevantProperties.OS_ARCH;

public final class Architecture
{
    // Note that s390x, aarch64, & ppc64le architectures are not officially supported and adding them here is only done out
    // of convenience for those that want to run C* on these architectures at their own risk (see #11214, #13326, & #13615)
    private static final Set UNALIGNED_ARCH = Collections.unmodifiableSet(Sets.newHashSet(
    "i386",
    "x86",
    "amd64",
    "x86_64",
    "s390x",
    "aarch64",
    "ppc64le"
    ));

    public static final boolean IS_UNALIGNED = UNALIGNED_ARCH.contains(OS_ARCH.getString());

    // Note that s390x (and all unaligned, see UNALIGNED_ARCH above) architectures are not officially supported, ref #17723
    public static final boolean BIG_ENDIAN = ByteOrder.nativeOrder().equals(ByteOrder.BIG_ENDIAN);

    private Architecture()
    {
    }
}