About Concurrent I/O

Article:HOWTO59558  |  Created: 2011-10-12  |  Updated: 2011-10-12  |  Article URL http://www.symantec.com/docs/HOWTO59558
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About Concurrent I/O

Veritas Concurrent I/O improves the performance of regular files on a VxFS file system without the need for extending namespaces and presenting the files as devices. This simplifies administrative tasks and allows databases, which do not have a sequential read/write requirement, to access files concurrently. This chapter describes how to use the Concurrent I/O feature.

On the Linux 2-6 kernel, with DB2 8.2.2 or later, you can use the Veritas Concurrent I/O feature to improve data write performance for DMS tablespaces with FILE containers. Concurrent I/O can also improve data write performance for most SMS tablespaces.

On AIX and Solaris:

With DB2 8.2.2 or later, you can use the Veritas Concurrent I/O feature to improve data write performance for DMS tablespaces with FILE containers. Concurrent I/O can also improve data write performance for most SMS tablespaces.

On AIX, HP-UX, and Solaris:

Quick I/O is still an alternative solution for DMS tablespaces.

In some cases (for example, if the system has extra memory), Cached Quick I/O may further enhance performance.

See How Concurrent I/O works

See Enabling and disabling Concurrent I/O


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