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。
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。
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。
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。
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。
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。
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。
应用推荐