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Home -> Community -> Mailing Lists -> Oracle-L -> RE: RAID 5/Oracle
One thing to note is the 60% degragation of write performance when using Raid5, that is why oracle strictly recommends against it. But to repeat something said many times in the past, read only systems or very low writes are great candiates for Raid 5.
"Do not criticize someone until you walked a mile in their shoes, that way when you criticize them, you are a mile a way and have their shoes."
Christopher R. Spence OCP MCSE MCP A+ RAPTOR CNA
Oracle DBA
Phone: (978) 322-5744
Fax: (707) 885-2275
Fuelspot
73 Princeton Street
North, Chelmsford 01863
-----Original Message-----
Sent: Wednesday, August 01, 2001 10:02 AM
To: Multiple recipients of list ORACLE-L
Ravindra Basavaraja schrieb:
>
> We are planning to move our database to Sun 4500 with A1000(RAID
> 5).Our system admin group has been working on this setup and I was
> told that the A1000 which is having 4 disks will be seen as just as
> one mount point after configuration.Is this the correct way of
> confuguration.Don't we see each disk
> of A1000 as different mount point.
>
> Thanks
> Ravindra
>
Hi,
if you setup a group of disks as a RAID5 disk array, they appear as one
logical unit. Hence, you only see one single mount point. Advantages: Read
access is usually faster, since the data is transparantly distributed to
your disks by the RAID system. It's another step towards higher availability
since RAID5 usually gives you the feature of replacing a damaged disk while
the file system keeps operating.
Disadvantage: You don't have that much control over the degree of
fragmentation since the data distribution is done by the RAID system.
| Regards, | | Stefan Jahnke |
-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Stefan Jahnke INET: stefan.jahnke_at_d2vodafone.de Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (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.com -- Author: Christopher Spence INET: cspence_at_FuelSpot.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (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).Received on Wed Aug 01 2001 - 10:46:32 CDT
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