Rorke Data The Galaxy 65 Especificações descarregar pdf (Página 111)

Galaxy Web GUI User Reference Manual

5-26 Disk Array Parameters

IMPORTANT!

 The “verification on Normal Drive Writes” method will affect the

“write” performance of your RAID system.

3. Max. Drive Response Timeout(msec):

This option prepares the array for applications featuring

streaming data flow operations and continuous reading such as

Video Streaming.

In situations such as drive failure or the occurrence of bad

blocks, a read returned after several hundreds of milliseconds

will be too long and cause choppy audio or dropped video

frames.

The Maximum Response Time option provides a timeout value

for processing read requests. If timeout is reported on a specific

member of an array, firmware immediately retrieves data from

the parity data and the striped blocks that reside on other

members of the array. In this way, causes of delay can be

eliminated.

4. AV Optimization:

The AV optimization option applies to the emerging Audio/Video

or streaming data flow applications such as the VOD/MOD, NLE

(Non-Linear Editing), and multi-streaming.

Fewer Steams: (for applications featuring sequential I/Os

and large block sizes; e.g., Video Editing)

1. The Maximum Drive Response Timeout will be

automatically set to 160ms.

2. The drive cache-flush threshold is set to a value lower

than Galaxy’s traditional Write-back Flush threshold.

3. A minimum read-ahead size is determined by the

Stripe size.

4. The Synchronized Cache Communications between

RAID controllers is disabled.

Multiple Steams: (for applications featuring smaller I/Os and

more outstanding I/Os, e.g., Media Broadcasting)

1. The Maximum Drive Response Timeout will be

automatically set to 960ms.

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