From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id mBN0GMrA012526 for ; Mon, 22 Dec 2008 19:16:22 -0500 Received: from omr15.networksolutionsemail.com (omr15.networksolutionsemail.com [205.178.146.65]) by mx3.redhat.com (8.13.8/8.13.8) with ESMTP id mBN0FRsP017513 for ; Mon, 22 Dec 2008 19:15:47 -0500 Received: from mail.networksolutionsemail.com (ns-omr15.mgt.hosting.dc2.netsol.com [10.49.6.78]) by omr15.networksolutionsemail.com (8.13.6/8.13.6) with SMTP id mBN0FQEa028768 for ; Mon, 22 Dec 2008 19:15:26 -0500 From: "Steve Costaras" References: <1229884467.5412.26.camel@localhost.localdomain> Date: Mon, 22 Dec 2008 18:15:28 -0600 MIME-Version: 1.0 Message-ID: <5440B12A673140C89F22744165C88838@analytical> Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=SHA1; boundary="----=_NextPart_000_000A_01C9645E.1AEFDB00" In-Reply-To: <1229884467.5412.26.camel@localhost.localdomain> Subject: [linux-lvm] LVM2 robustness w/ large (>100TB) name spaces? Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: To: 'LVM general discussion and development' This is a multi-part message in MIME format. ------=_NextPart_000_000A_01C9645E.1AEFDB00 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I have not seen much commentary in my searches concerning LVM under linux with very large name spaces (single file systems), and figured I would pose the question out to the forum as I am in the planning stages here to rebuild and consolidate systems. Initially I have a couple questions regarding the underlying LVM structure and what it supports: - Are PV sizes >=16TB possible? (I am looking to add external RAID chassis which will present to the system as large (~13TB (16-drive, raid-6, + hot spare)) drive. The subsystem drive will be replaced w/ 2TB or greater models when they are available in 2010-2011 and am trying to avoid a forklift upgrade of subsystem components. - What are the limits on PE/LE's per logical volume (>200,000,000? A problem?) (I will be attaching multiple external chassis like above to several HBA's and will be using LVM striping to increase performance. So a small PE size (4MB-8MB) would be best to aid in the distribution of requests across the physical subsystems.) - Are there any references or examples of users who have created/run large (100TB - 1PB) LVM installations that are functional in the real-world? (I don't see why this would not work on paper, but theory and practice are two different things). 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