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For those customers that are on this list and are using EMC Powerpath or HP Securepath and have performance problems while using ocfs and point to ocfs first. the actual io overhead for an io on ocfs compared to raw, when it's database io is negligable, we don't do any locking, we have about 40000 clockticks of processing from logical to physical offset, nothingin todays cpu...

Hi All, we are using Red Hat 2.1 Kernel e38 along with MSA 1000. ocfs version being used is $ rpm -qa | grep ocfs ocfs-tools-1.0.10-1 ocfs-2.4.9-e-enterprise-1.0.12-1 ocfs-support-1.0.10-1 Database Version is 9.2.0.5 However we find that the performance of the database on OCFS is too slow. even a select count(1) from all_tables takes like a while to complete. We initially assumed RAC is

Stephen, all, Thank u very much for your answer and i wish you an happy thanksgiving. Currently we tried to migrate our base on RAW devices already using e41smp, SecurePath (HP) 3C and Qlogic 7.00. The average response time of our sql request on ia32 is 0.32Sec very regularly. On our Itanium on OCFS that's very randomly between 1 and 15Sec, and on RAW between <1s and 3 sec. David is an another customer of RedHat,HP,Oracle and happen a bug very close to our. The...

Stephen, all, Thank u very much for your answer and i wish you an happy thanksgiving. Currently we tried to migrate our base on RAW devices already using e41smp, SecurePath (HP) 3C and Qlogic 7.00. The average response time of our sql request on ia32 is 0.32Sec very regularly. On our Itanium on OCFS that's very randomly between 1 and 15Sec, and on RAW between <1s and 3 sec. David is an another customer of RedHat,HP,Oracle and happen a bug very close to our. The...

Hi all, I curently have a big problem. One request (listed above) using context take up to 1000 more time than the on RAW or ext2 database. I have ran this request on a single IA32 machine with Redhat and dbf on ext2. The average reponse time is less than a sec. The same request on RAC 4 nodes cluster on RAW take the same average time. On ext2 idem. But on OCFS it took up to 15 sec randomly

Hi all, I curently have a big problem. One request (listed above) using context take up to 1000 more time than the on RAW or ext2 database. I have ran this request on a single IA32 machine with Redhat and dbf on ext2. The average reponse time is less than a sec. The same request on RAC 4 nodes cluster on RAW take the same average time. On ext2 idem. But on OCFS it took up to 15 sec randomly

I am starting to see a few issues with OCFS and 9.2.0.3 RAC on redHat Linux AS 2.1. Wondering if there is anyone out there experiencing similar issues... a few pointers to the issues.. 1. OCFS read/write performance is way lower than a read/write to a raw device.. i can give you some comparison numbers.. 2. Writes to shared disk with ocfs would get locked up by one server.. it doesnt have to

I am starting to see a few issues with OCFS and 9.2.0.3 RAC on redHat Linux AS 2.1. Wondering if there is anyone out there experiencing similar issues... a few pointers to the issues.. 1. OCFS read/write performance is way lower than a read/write to a raw device.. i can give you some comparison numbers.. 2. Writes to shared disk with ocfs would get locked up by one server.. it doesnt have to

Hi OCFS Gurus... I have 2 questions for OCFS ver 1.0.10.1 1. What is the Maximum mount point suggested if we are using OCFS ? 2. Is there any method to tune the OCFS to booster the IO performance? Awaiting ur responses... Thanks in Advance... Rgds/Jeram