Sanjay, I understand all these devices are RAW. You dont need ASMLIB if you use the /etc/sysconfig/rawdevices mapping. OCFS2 is not an options as it is not supported. Raj On 3/7/06, Sanjay Mishra <smishra_97@xxxxxxxxx> wrote: > > Raj > > I think question is to use ASM with ASMLIB I/O API or ASM with Linux I/O > API. In both cases, it is using RAW. > > OCR and Voting disk has to go in RAW devices as ASM is not meant for these > files. We need OCR and Voting before ASM is started. I don't think that it > is possible to store OCR/Voting disk on OCFS2. OCFS2 use differnt config > files than OCFS and so Oracle installer cannot verify the cluster file > location as it is trying to read from OCFS location. Even if you create > symlink for OCFS and OCFS2 location , it will still not work as OCFS2 > configuration doesn't have any GUID information. > > I am catching on RAC and reading extensively and so this is just mine view > > > thanks > Sanjay > > *Raj S <sanstorage@xxxxxxxxx>* wrote: > > There are no issues using rawdevices for ocr.dbf and votingdisk. They work > just fine. Put them in your /etc/sysconfig/rawdevices and create the > necessary mapping to the shared storage. We have several of these running > fine on raw devices with 10G R2 on RHEL4. > > Raj > > On 3/7/06, LiShan Cheng <exriscer@xxxxxxxxx> wrote: > > > > Hi > > > > That test is comparing LVM + EXT3 vs ASM + RAW. My comparison would be > > ASM + RAW + LINUX I/O API vs ASM + RAW + ASMLIB I/O API. > > > > I am not sure if ASMLib is better or ASM and RAW is enough. > > > > > > Cheers > > > > LSC > > > > > > > > On 3/ 7/06, johan Eriksson < johan.eriksson@xxxxxxxxxxxx> wrote: > > > > > > On Tue, 2006-03-07 at 10:54 +0100, LiShan Cheng wrote: > > > > Hi > > > > > > > > I am going to install a 10gR2 RAC in a couple of weeks. It will be > > > > RHEL 4 Update 2 and I will be using ASM for all database files. > > > > However I have some doubts, I am wondering if ASMLib API gives > > > better > > > > performance than Linux standard I/O API? Anyone with both ASMLib > > > > experience and ASM + RAW + Linux I/O API? > > > > > > > We have just installed this combination but I haven't tested the > > > performance yet. > > > One test is at http://www.linuxjournal.com/article/8539 > > > > > > > I also read this note, Note: 357492.1, Linux 2.6 kernel deprecation > > > of > > > > raw devices. I was planning to use RAW Devices for the voting disk > > > and > > > > OCR files. If raw devices are deprecated does it mean I must use > > > > OCFS2? > > > > > > > Linux 2.6 and OCFS2 aren't yet cerified so I think you have to use raw > > > for ocr and voting (if you care about support) > > > > > > /johan > > > > > > > > > ------------------------------ > Yahoo! Mail > Bring photos to life! New PhotoMail > <http://pa.yahoo.com/*http://us.rd.yahoo.com/evt=39174/*http://photomail.mail.yahoo.com>makes > sharing a breeze. > >