RE: Does HP-UX striping give performance boost or decrease?

Merry Christmas to you too !!! I think you are talking about a software mirroring scheme using LVM an Mirror/X You will get better performance using raw devices than with filesystems Also use 2GB lvols for your tablespaces and follow Informix recomendations like using separate tablespaces for the rootdbs and the logs etc.etc. I think the striping is OK but with 2GB of RAM try using as much memory as you can which is also much faster than disks Yours > N. Daniel Bonesana > SIEMENS-ITRON BUSINESS SERVICES S.A. > Balcarce 683, (C1064AAM) Buenos Aires, Argentina. > * 54 (11) 4320-5456 * Daniel.Bonesana@siemens-itron.com.ar > > -----Original Message----- From: Pentti Tiet'v'inen [mailto:pat@sci.fi] Sent: Thursday, December 21, 2000 10:41 AM To: informix-list@iiug.org Subject: Does HP-UX striping give performance boost or decrease? Merry Christmas from the land of original Santa Claus! (Finland)! There has been discussions how to organize hard disks to get optimum performance, but .. I have: - L-series HP9000 with 2GB RAM and 6 x 18 GB Hard Disks. - Those disks are now mirrored and striped (with minimum supported Block Size which is 1MB ?). - The disk volume is then divided to 2GB chunks for database usage. - One Lvol is mounted to unix-filesystem for saving logs (and Online message-file) Is there (much) better ways to get the max out of disks? No striping perhaps? Should I move logs away from same disk set to separate disk? How can I measure the performance of my construction? Thanks for any comments Pentti