Actually, as of AIX 4.3.3, it does support 0+1 for LVs, but that wasn't the scenario I was imagining. I was envisioning creating a set of RAID-1 raid groups on the storage array and then striping across them using the LVM. RAID-1 is one of those things that I feel is generally better to let your storage array handle - software RAID-1 requires your host to generate double the I/Os and should one side of the pair fail, hardware arrays tend to recover more gracefully than software raid. RAID-0, by comparison, is very easy.
Thanks, Matt ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Tuesday, August 12, 2003 9:44 PM > The AIX LVM supports RAID-0 and RAID-1, but not together, as you state. > > However, a rude form of RAID-0 can be achieved by specifying "max allocation > policy", which will cause round-robin distribution of physical extents (PEs) > across a list of physical volumes (PVs), thereby approximately RAID-0 at a > large granularity (i.e. 4M, 8M, 16M per "stripe"). Still, it beats the heck > out of RAID5... > > > on 8/12/03 12:24 PM, Schauss, Peter at [EMAIL PROTECTED] wrote: > > > Our hardware people tell me that our disk array will not support Raid 10. > > Given a choice between Raid 1 or 5 for my tablespaces, which one > > is best? This is Oracle 8.1.7 on AIX 4.3.3. The application will > > have a mix of read and write activity. > > > > Thanks, > > Peter Schauss > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Tim Gorman > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Matthew Zito INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
