Redo Logs placing

From: VIVEK_SHARMA <VIVEK_SHARMA_at_infosys.com>
Date: Tue, 25 May 2004 12:27:41 +0530
Message-ID: <F0CB3C9983B77E4AB4ADEFA63DAB109F07114570@twrmsg03.ad.infosys.com>

EXISTING CONFIGURATION SETUP(XP1024):-

Hardware RAID (1+0) on 4 underlying Disks.
4 Units of 14 GB each are created using a Software emulation (OPEN-E, OPEN-9) on this underlying Hardware RAID (Each Unit is known as Logical Device [LDEV])
Each LDEV is assigned to a different Controller port.
For Online Redo logs, Volume Group [VG] to be created EITHER of a SINLE LDEV OR by O.S. Software Striping (RAID 0) across 4 LDEVs.

Qs. For Online Redo Logs placing, which of the following 2 options is better?

Redo logs if placed on a Single LDEV-VG will have only a single level of Hardware RAID 1+0 & be assigned to a SINLE Controller port.=3D20
Redo logs if placed on a 4 LDEV's-VG will have 2 levels Striping (Both s/w & H/w) But also be assigned to 4 Controller ports.

(NOTE - Ideally Redo logfiles should exist on RAW or NON-Striped, Mirror Volume.)

Shall provide any details required
Thanks

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Received on Tue May 25 2004 - 02:51:41 CDT