OpenEdge 10.x, 11.x
Windows Server 2K8, 2K12
Could someone tell me what stripe size, read en write policy I should configure in a RAID 10 array to get the best performance? Block size of my database is 4K.
Hello rvkanten,
for setting up a disk system, here are my recommendations, based on the information you gave:
- No special read/write policy - or is there something in the options which makes you doubt?
- No write caching until you have a battery powered cache!
- 1 hot spare disk or 2
- stripe size can be something between 32 and 256 kB. Choose the biggest in this range, what your controller can support
- Write scales with every 2 disks, so 10 disks have 5 write channels parallel
- Read scales linear
- Read and write can be done in parallel, but as should be clear, not in every channel at the same time - physics will win :)
- When you have SSDs, they are 5-10 times faster than normals disks :)
Klaus
And this may helpful, if you look for the last percentage of performance, or use 4 K disks or SSD.
I checked on my computer and Windows did it well, but better proove :)
superuser.com/.../what-is-partition-alignment-and-why-whould-i-need-it
Here is the link :)
Thanks you for the info.