You take a raw disk performance hit with LVM in exchange for
resizability and partionability.
My biggest issue was that the internal SAS/SATA raid controller in my
Dell T7400 wasn't update-able to properly use the 3T disks. Updating
to the LSI card turned out to be a great hidden surprise for performance
and simplicity.
Greg
LSI MegaRAID 9260-4 6Gb/sw/ 512MB cache
Dual 128GB OCZ4 SSD RAID-0 boot
4 x 3Terabyte RAID-0 data, xfs
Cloudera CDH 4.1.1
On 11/28/2012 9:26 AM, Jean-Marc Spaggiari wrote:
Hi Mike,
Helped a lot. Just pointed me that not any of my nodes is correct ;)
But now I know which way to go.
Regarding SATA II vs SATA III is there a big difference? I found many
JBOD cards working with SATAII but I did not found any (at good price)
which is managing SATA III..
Or will LVM be able to replace a JBOD card? In the documentation it's
saying that LVM is suitable for "Creating single logical volumes of
multiple physical volumes or entire hard disks (somewhat similar to
RAID 0, but more similar to JBOD), allowing for dynamic volume
resizing.". This is what we want to achieve here, right?
JM
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