Unless ordering superannuated storage from eBay, disks are sized at either 36Gb, 73Gb, or larger. Dedicating these devices to online redo log files of size 100Mb, 500Mb, or 1Gb might be tough to get past the CFO.
The CIO/CTO might well also ask why some form of RAID-1 or RAID-5 redundancy is not recommended for use here. What would that reality do for the answer to this question? Especially if RAID-5 is in use (yes, BAARF)! Steve's answer of 42 would be closer to the mark than any answer yet provided, besides being celestially correct... Also, we're talking about a single process named LGWR and another 1-2 processes named ARCn. Isn't it possible that these storage devices can handle occasional concurrency of 2-3 without degrading performance? Yup, the answer is "it depends", not "A", or "B", or "C".... Whatever "Oracle's recommendation" is for this question, it is certainly a tad on the simplistic side and useless in real life. The discussion is certainly worthwhile, but as a multiple-choice question with only one answer it is worthless. The OCP exam does not deal in reasoning and discussion... on 7/30/03 12:34 PM, Igor Neyman at [EMAIL PROTECTED] wrote: > Well, in archivelog mode LogWriter may use one group and Archiver may > use the other group, so I'd agree with Kirti. > > Igor Neyman, OCP DBA > [EMAIL PROTECTED] > > > > -----Original Message----- > Mladen Gogala > Sent: Wednesday, July 30, 2003 12:59 PM > To: Multiple recipients of list ORACLE-L > > There are two reasons: > 1) Redo log groups are never used simultaneously, so they can reside on > the same disk. Log members should not be on the same disks for > increased > survivability. That gives us 2 groups with 4 members, each two > members > sharing the same device - 4 disks alltogether. > 2) It's because I say so and I'm an 8i OCP. > > > On 2003.07.30 13:44, KENNETH JANUSZ wrote: >> Why? What is the logic? >> >> Ken Janusz, CPIM >> >> ----- Original Message ----- >> To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> >> Sent: Wednesday, July 30, 2003 12:29 PM >> >> >>> The answer is 4. Of course, no one in the right mind would have >>> 2 groups with 4 members each. >>> >>> On 2003.07.30 13:19, Senthil Kumar wrote: >>>> Hi all, >>>> >>>> What is the correct answer for this? >>>> >>>> Q> If you have 2 redo log groups with 4 members each, how many > disks >> does >>>> Oracle recommend >>>> to keep the redo log files? >>>> >>>> 1. 8 >>>> 2. 2 >>>> 3. 1 >>>> 4. 4 >>>> >>>> Which is the correct answer. >>>> >>>> TIA >>>> Senthil >>>> >>>> -- >>>> Please see the official ORACLE-L FAQ: http://www.orafaq.net >>>> -- >>>> Author: Senthil Kumar >>>> 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). >>>> >>> >>> -- >>> Mladen Gogala >>> Oracle DBA >>> -- >>> Please see the official ORACLE-L FAQ: http://www.orafaq.net >>> -- >>> Author: Mladen Gogala >>> 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: KENNETH JANUSZ >> 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: 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).
