This is due to the way in which JFS2 is implemented with a write-exclusive inode lock, allowing multiples users to read the same file simultaneously.
这是因为JFS2在实现时使用了写独占(write - exclusive)索引节点锁，允许多个用户同时读取相同的文件。
Some file systems support network clients obtaining an exclusive write lock on a file and remove the lock if the client crashes.
一些文件系统支持网络客户端获取对文件的排它写锁定，以及当客户端死机时移交锁定。
Both use two standard file descriptors on each end of the connection-one exclusive to read and another exclusive to write operations.
它们在连接的两端使用两个标准的文件描述符—一个只执行读操作，另一个只执行写操作。
Once an exclusive lock has been issued, no other read or write operations can take place.
在发出独占锁定后，其他的读或写操作将不会再发生。
If you choose this path, though, you will have to write the code to enforce the mutually exclusive arrangements between data items in your business messages.
但是如果您这样做了，您将不得不自己在业务消息中编写代码，实现相互冲突的数据元素。
Quiesced Update 0x2 a table space is in this state when the application that invokes the table space quiesce function has exclusive write access to the table space.
QuiescedUpdate0x2当调用表空间静默(quiesce)功能的应用程序独占写访问表空间时，该表空间就处于这种状态。
Quiesced exclusive 0x4 a table space is in this state when the application that invokes the table space quiesce function has exclusive (read or write) access to the table space.
Quiesced Exclusive0x4当调用表空间静默(quiesce)功能的应用程序独占(读或写)访问表空间时，该表空间就处于这种状态。
LOCK_EX an exclusive lock. This denies all other processes both read and write access to the file.
排他锁。除加锁进程外其他进程没有对已加锁文件读写访问权限。
Exclusive lock - is a write lock that prevents data from being changed while a user is already modifying it.
独占式加锁—是一种写加锁，防止数据在有用户已经在修改它时被修改。
Exclusive lock - is a write lock that prevents data from being changed while a user is already modifying it.
独占式加锁—是一种写加锁，防止数据在有用户已经在修改它时被修改。
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