Sorry Dan, I guess your name sticks with me from being part of the list. My apologies to Jeff (if he is listening).
Anthony -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dan Fitzgerald Sent: Monday, March 07, 2005 4:26 PM To: [email protected] Subject: RE: [U2] Universe/Linux Performance Issue I'm flattered, but those articles were by Jeff Fitzgerald, no relation. "Our greatest duty in this life is to help others. And please, if you can't help them, could you at least not hurt them?" - H.H. the Dalai Lama "When buying & selling are controlled by legislation, the first thing to be bought & sold are the legislators" - P.J. O'Rourke Dan Fitzgerald >From: "Anthony Dzikiewicz" <[EMAIL PROTECTED]> >Reply-To: [email protected] >To: <[email protected]> >Subject: RE: [U2] Universe/Linux Performance Issue >Date: Mon, 7 Mar 2005 16:06:20 -0500 > >Thanks to all those that replied to my post. It appears that the >performance problem that I experience on write intensive operations is >not a Universe issue. It turns out that it is a problem (probably a >driver) for the disk array (Clariion CX300) or the SCSI card (Qlogic >QlA2312). > >It was very interesting to get into the details of file sizing and >such. I pulled out all the old Spectrum articles by Dan Fitzgerald and >Peggy Long (series on Hashed Files). I tried all different types of >files to do performance tests. It turns out that the way our keys are >structured, we only fit into Universe type 18. Even with that there is >a good amount of overflow. For now, I'll stick with dynamic. However, >I have resized some files with a MINIMUM.MODULUS override to prevent >merge operations during the purges (we've got the space) and that seems >to make sense. > >Thanks >Anthony >------- >u2-users mailing list >[email protected] >To unsubscribe please visit http://listserver.u2ug.org/ ------- u2-users mailing list [email protected] To unsubscribe please visit http://listserver.u2ug.org/ ------- u2-users mailing list [email protected] To unsubscribe please visit http://listserver.u2ug.org/
