1.7 Upper Limits of the File System

The following table lists the upper limits of the GFS Shared File System on a file system basis:

The maximum number of GFS Shared File Systems in a cluster system is 10.

Table 1.1 Upper limits of file system
Item	Upper limit
Maximum file system capacity	32 terabytes - 1 kilobyte (*1)
Maximum partitions size	1 terabyte
Maximum file size	1 terabyte - 512 byte
Maximum number of sharable nodes	4 nodes
Maximum directory size	2 gigabytes - 1 kilobyte
Maximum number of partitions consisting of a file system	32 partitions
Maximum number of i-nodes per file system	16 mega
Maximum number of directories per file system	16 mega (*2)
Maximum number of concurrently open files	5000 files (*3)
Maximum number of file locks setting	100000 file locks

*1 On the x86 architecture, maximum file system capacity is 1 terabyte - 1 kilobyte.
*2 On the x86 architecture, maximum number of directories is 1 mega.
*3 Maximum number of files can be concurrently open on one node.

Note

We recommend you to lessen the number of the GFS Shared File Systems simultaneously used in one cluster system as much as possible. When you use many GFS Shared File Systems, please carry a sufficient number for a node of CPUs, and carry out system verification in advance.