What are the primary contents of a block group and what purpose do they serve?
What will be an ideal response?
A block group contains a superblock, an inode table, an inode allocation bitmap, a
block allocation bitmap, group descriptor and file and directory data. The superblock is
redundantly copied into each block group and contains critical information about the file system.
The inode table contains an entry for each inode in the group. The inode allocation bitmap
tracks the free and allocated inodes in the group; similarly, the block allocation bitmap
tracks available blocks. The group descriptor contains locations of data structures within the
group and maintains several accounting values. The data area of a group is where bits of file
and directory data are stored.
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A(n) ________ symbol in a PivotTable report indicates that a group can be collapsed
Fill in the blank(s) with the appropriate word(s).
Dekker’s Algorithm, testAndSet, swap, and the semaphore operations P and V may all be used to enforce mutual exclusion. Compare and contrast these various schemes. Consider their respective advantages and disadvantages.
What will be an ideal response?