Redo Logs setup

From: VIVEK_SHARMA <VIVEK_SHARMA_at_infosys.com>
Date: Mon, 24 May 2004 12:46:15 +0530
Message-ID: <F0CB3C9983B77E4AB4ADEFA63DAB109F07114566@twrmsg03.ad.infosys.com>

Configuration setup (XP1024)
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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.

Volume Group [VG] created EITHER from a SINLE LDEV OR by O.S. Software Striping (RAID 0) across 4 LDEVs.

Qs. For 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.=20
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 Mon May 24 2004 - 02:12:57 CDT