Veritas File System 5.0 Release Notes (September 2006)

Veritas File System 5.0 Release Notes
Known Issues
Chapter 1 21
of 512K per 1 TB for an 8K block size file system (4 MB per 1 TB for a 1K block size file system).
Therefore, large file systems must be mounted only on systems that have sufficient memory. The
memory requirements for mounting large file systems are shown in the tables below.
While performing a full fsck, the system keeps certain data structures in the core for validating the
space usage and inode usage. The space needed depends on the number of inodes and the number of
blocks in the file system. The fsck command needs approximately 16 MB per 1 TB for an 8K block
size file system (128 MB per 1 TB for a 1K block size file system) and 32 MB per million inodes.
Sufficient memory and swap space should be configured on the system before running a full fsck on a
large file-enabled system.
A replay of fsck command does not need a significant amount of memory and does not have these
issues.
Table 1-3 Memory Usage for a File System With a 1K Block Size
File System
Size
128 GB 1 TB 8 TB 64 TB 256 TB
Memory
Usage
1 MB 4 MB 32 MB N/A N/A
Table 1-4 Memory Usage for a File System With a 2K Block Size
File System
Size
128 GB 1 TB 8 TB 64 TB 256 TB
Memory
Usage
512 K 2 MB 16 MB 128 MB N/A
Table 1-5 Memory Usage for a File System With a 4K Block Size
File System
Size
128 GB 1 TB 8 TB 64 TB 256 TB
Memory
Usage
128 K 512 K 4 MB 32 MB 128 MB
Table 1-6 Memory Usage for a File System With an 8K Block Size
File System
Size
128 GB 1 TB 8 TB 64 TB 256 TB
Memory
Usage
128 K 512 K 4 MB 32 MB 128 MB