RE: Defining chunks and extents using RAIS 5

On this line of thinking... Does anyone know if you set up RAID 5 with Disk Suite for solaris if the raid 5 metadevices created are usable by informix? (In disksuites docs it says, that to use them a application would have to have its own way of accessing the raw device). And if they are do you set them up like you where setting up a normal raw device for informix? (At this time I am using raid 1.) Better than nothing. :) Thanks david.tamburin@protegrity.com > -----Original Message----- > From: owner-informix-list@iiug.org > [mailto:owner-informix-list@iiug.org]On Behalf Of Art S. Kagel > Sent: Wednesday, February 10, 1999 1:01 PM > To: informix-list@iiug.org > Subject: Re: Defining chunks and extents using RAIS 5 > > > Ricardo Palmeira Ten'rio wrote: > > > > Is there any performance gains separating rootdbs, logdbs, physdbs and > > datadbs when we use RAID 5? > > For the same reason should I define the apropriate first and next > > extents for tables? > > Yes, definitely performance gains and TREMENDOUS safety gains, you will > sleep better knowing you cannot loose you data and logs in one fell > swoop. Setting extent sizes to reduce fragmentation, as well as using > multiple data dbspaces to isolate busy tables from each other to > further enhance performance and reduce fragmentation, can have definite > positive value. > > Please look up my periodic rants (I'm just too tired to rehash this in > full right now) about NOT using RAID 5 for database chunks in the IIUG > archives of this newsgroup or read the relevant sections of my recent > TechNotes article on tuning. I STRONGLY dislike RAID 5 for database > chunks and with the price of drives today completely reject ANY cost > based objection to using Informix mirror, RAID1 or RAID10 instead. > FWIW. > > Art S. Kagel >