Extended RAC from Array Based Mirroring to Host Based Mirroring

From: Ls Cheng <exriscer_at_gmail.com>
Date: Tue, 17 Apr 2012 07:29:08 +0200
Message-ID: <CAJ2-Qb_zbXB-x6UGufMtkUmmZupg83bAibThw0XuEj2aViba0Q_at_mail.gmail.com>

Hi all
We have a 4 nodes Extended RAC running 10 10.2.0.5 Sun Solaris since 2008, the distance is around 20KM and the current performance is good. There are around 15 databases in this Cluster.

The mirroring is done by the storage (EMC Clariion and Mirrorview), we are considering changing this setup to ASM based mirroring to get a true Active/Active setup with version upgrade to 11.2.0.3.

Host Based mirroring has some overheads such as CPU and I/O, we did some tests and I/O seemed a pretty considerable bottleneck because all I/O are issued twice from the host.

Has anyone done this switch from the past and dont mind share their experience?

Thanks

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LSC
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http://www.freelists.org/webpage/oracle-l Received on Tue Apr 17 2012 - 00:29:08 CDT