Quantum 3.5 This option sets the size of each cache buffer, Buffer cache. For optimal performance

	Chapter 4 Configuring StorNext
	Windows Configuration Utilities
Field / Button	Description
Individual Buffer Size	This option sets the size of each cache buffer.
	This determines the I/O transfer size used for
	the buffer cache. For optimal performance,
	Individual Buffer Size should match the RAID
	stripe size. If Individual Buffer Size is less
	than the RAID stripe size write performance
	may be severely degraded.
	This size must be divisible by the file system
	block size. The maximum value allowed is
	512K and the minimum value allowed is the
	file system block size. The value default is
	64K.
Minimum Total Cache	This value controls the amount of memory
Size	used to cache data from the file system. This
	parameter is shared by all file systems with
	the same block size.
Auto-DMA Read/Write	Buffer Cache Auto DMA Read Length and
Sizes	Buffer Cache Auto DMA Write Length control
	the minimum I/O size for DMA transfers.
	That is, any smaller transfer will always go
	through the buffer cache.
	The default value is 1MB.
Number of Read-	This option controls the size of the read-ahead
ahead Buffers	window used by the buffer cache.
	The default value is 16 buffers with a
	maximum of 100. Using a value of 0 disables
	read-ahead.
Number of Threads	This option controls the number of dedicated
	background threads used by the buffer cache
	for performing I/O.
	The default value is 8, with a minimum of 1
	and a maximum of 100. Using a larger value
	can increase I/O concurrency in the buffer
	cache and therefore improve performance.

StorNext 3.5 Installation Guide 81