Open Systems Tape Pipelining; Fcip Fastwrite And Tape Acceleration - Brocade Communications Systems Brocade 8/12c User Manual

Brocade network advisor san user manual v11.1x (53-1002167-01, may 2011)

Hide thumbs Also See for Brocade 8/12c:

Table of Contents

DSCP priority/bits

Open systems tape pipelining

Open Systems Tape Pipelining (OSTP) can be used to enhance open systems SCSI tape write I/O

performance. To implement OSTP over FCIP, you must enable the following two features:

When the FCIP link is the slowest part of the network, consider using FCIP Fastwrite and Tape Read

and Write Pipelining. FCIP Fastwrite and Tape Acceleration are two features that provide

accelerated speeds for read and write I/O over FCIP tunnels in some configurations:

Both sides of an FCIP tunnel must have matching configurations for these features to work. FCIP

Fastwrite and Tape Acceleration are enabled by turning them on during the tunnel configuration

process. They are enabled on a per-FCIP tunnel basis.

Document Title

xx-xxxxxxx-01

Default Mapping of DSCP priorities to L2Cos Priorities (Continued)

L2CoS priority/bits

FCIP Fastwrite and Tape Acceleration.

FC Fastwrite.

FCIP Fastwrite accelerates the SCSI write I/Os over FCIP.

Tape Acceleration accelerates SCSI read and write I/Os to sequential devices (such as tape

drives) over FCIP, which reduces the number of round-trip times needed to complete the I/O

over the IP network and speeds up the process. To use Tape Acceleration, you must also

enable FCIP Fastwrite.

Open systems tape pipelining

Assigned to:

Class 3 Multicast

Broadcast/Multicast

Table of Contents