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For example, a lock file might govern access to a set of related resources, such as several different files, directories, a group of disk partitions, or selected access to higher level protocols like servers or database connections. When using lock files, care must be taken to ensure that operations are atomic. To obtain a lock, the process ...
The file system has two different inode on-disk layouts. One is compact, and the other is extended. [1]Little-endian on-disk design [1]; 32-bit block addressing, which currently limits the total possible capacity of an EROFS filesystem to 16 TiB of 4 KiB block size.
Exclusive locks cannot be obtained when a record is already locked (exclusively or shared) by another entity. If lock requests for the same entity are queued, then once a shared lock is granted, any queued shared locks may also be granted. If an exclusive lock is found next on the queue, it must wait until all shared locks have been released.
Since multiple reader threads may hold the lock at once, this means that a writer thread may continue waiting for the lock while new reader threads are able to acquire the lock, even to the point where the writer may still be waiting after all of the readers which were holding the lock when it first attempted to acquire it have released the ...
First-round players to watch, keys to the game. For the first time ever, there will be College Football Playoff games on campuses. Notre Dame-Indiana will get things started on Friday night before ...
Days before bitter cold descends on the nation’s capital for the inauguration of Donald Trump, Ronald Reagan Washington National Airport has a problem with its heating system in the terminal.
In this solution of the readers/writers problem, the first reader must lock the resource (shared file) if such is available. Once the file is locked from writers, it may be used by many subsequent readers without having them to re-lock it again. Before entering the critical section, every new reader must go through the entry section. However ...
Recommended bottles. When seeking out a bottle for mulled wine, choose something youthful, medium- to full-bodied, and characterized by pronounced fruit-forward flavors and soft tannins.