Home > ASM > Oracle ASM Storage Limits

Oracle ASM Storage Limits

November 19, 2013

Oracle ASM Storage Limits
Oracle ASM provides near unlimited capacity for future growth, but does have some storage limits. For example, Oracle ASM has the following limits on the number of disk groups, disks, and files:
  • 63 disk groups in a storage system
  • 10,000 Oracle ASM disks in a storage system
  • 1 million files for each disk group
Without any Oracle Exadata Storage, Oracle ASM has these storage limits:
  • 2 terabytes (TB) maximum storage for each Oracle ASM disk
  • 20 petabytes (PB) maximum for the storage system
With all Oracle Exadata Storage, Oracle ASM has these storage limits:
  • 4 PB maximum storage for each Oracle ASM disk
  • 40 exabytes (EB) maximum for the storage system
The maximum size limit of a disk group equals the maximum disk size multiplied by the maximum number of disks in a disk group (10,000).
File size limits are dependent on the value of the disk group compatibility attributes. Oracle ASM supports file sizes greater than 128 TB in any redundancy mode when the COMPATIBLE.RDBMS disk group attribute is set greater than 10.1.
If COMPATIBLE.RDBMS is set to 10.1, the file size limits are less. For example, with COMPATIBLE.RDBMS equal to 10.1 and the AU size equal to 1 MB, Oracle ASM file size limits are:
  • External redundancy: 35 TB
  • Normal redundancy: 5.8 TB
  • High redundancy: 3.9 TB
Note:
Oracle Database supports data file sizes up to 128 TB depending on the file system. In addition, Oracle Database has a file size limit that is dependent on the DB_BLOCK_SIZE initialization parameter.

 

Advertisements
Categories: ASM
%d bloggers like this: