(stride) 32K = 256K / 8K (dbd) 4 = 5 - 1 (stripe_width) 128 = 4 * 32K
This results in the following command:
$ mkfs.ext3
For more information on setting the stripe size, see the article "Optimizing the EXT3 file system on CentOS (http://wiki.centos.org/HowTos/Disk_Optimization)."
Using the IO Accelerator as swap space
NOTE: Adding multiple swap partitions usually slows down swap performance, even if they are set at the same priority. For best performance, only use one IO Accelerator device as swap space.
To safely use the IO Accelerator as swap space requires passing the preallocate_memory kernel module parameter. The recommended method for providing this parameter is to add the following line to
options iomemory-vsl preallocate_memory=1072,4997,6710,10345
Where 1072, 4997, 6710, and 10345 are serial numbers obtained from the
A 4 KiB sector size format is required for swap. This reduces the driver memory footprint to reasonable levels. Use the Management Tool or the
CAUTION: You must have 400 MiB of free RAM per 80GB of IO Accelerator capacity (formatted to 4 KiB block size) to enable the IO Accelerator with
NOTE: Be sure to provide the serial numbers for the IO Accelerators, not the adapter.
NOTE: The preallocate_memory module parameter is necessary to have the drive usable as swap space. See the HP IO Accelerator User Guide for Linux for more information on setting this parameter.
NOTE: The preallocate_memory parameter is recognized by the IO Accelerator driver at load time, but the requested memory is not actually allocated until the specified device is attached.
Linux filesystem tuning 22
