salut
in documentatia de la DAC960 (driverul de linux) zice ca pentru o
utilizare optima sa-ti creezi ext2fs-ul cu block size de 4096 si stride de
16 (ca sa match 64k stripe size de la dac960)
"For maximum performance and the most efficient E2FSCK performance, it is
recommended that EXT2 file systems be built with a 4KB block size and 16
block stride to match the DAC960 controller's 64KB default stripe size.
The command "mke2fs -b 4096 -R stride=16 <device>" is appropriate.
Unless there will be a large number of small files on the file systems, it
is also beneficial to add the "-i 16384" option to increase the bytes per
inode parameter thereby reducing the file system metadata. Finally, on
systems that will only be run with Linux 2.2 or later kernels it is
beneficial to enable sparse superblocks with the "-s 1" option."
in documentatia de mkfs.xfs am asa:
-b Block size options.
This option specifies the fundamental block size of
the filesystem. The valid suboptions are:
log=value and size=value; only one can be supplied.
The block size is specified either as a base two
logarithm value with log=, or in bytes with size=.
The default value is 4096 bytes (4 KB) on systems
with a 4KB pagesize. The minimum value for block
size is 512; the maximum is 65536 (64 KB). XFS on
Linux currently only supports pagesize blocks.
(asta traduc eu ca are block size de 4096 ... good :) )
si suboptiunile pentru -d
su:
The su suboption is used to specify the stripe unit
for a RAID device or a striped logical volume. The
suboption value has to be specified in bytes, (usu-
ally using the m or g suffixes). This value must
be a multiple of the filesystem block size.
si sw:
The sw suboption is used to specify the stripe
width for a RAID device or striped logical volume.
The suboption value is expressed as a multiplier of
the stripe unit, usually the same as the number of
stripe members in the logical volume configuration,
or data disks in a RAID device.
acuma eu nu prea ma prind (tre sa ma culc) dar mi-am prins urechile in
termenii stride, stripe, stripe unit, stripe width
daca cineva stie sa ma lumineze si pe mine si sa-mi dea un exemplu (mura
in gura cum se zice)
thanks
----------------------------
Mihai RUSU
"... and what if this is as good as it gets ?"
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