From: Christoph Hellwig <hch@infradead.org>
To: Eric Van Hensbergen <ericvh@hera.kernel.org>
Cc: dm-devel@redhat.com, ming@acis.ufl.edu, linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCH] dm-cache: block level disk cache target for device mapper
Date: Thu, 30 Nov 2006 14:48:07 +0000 [thread overview]
Message-ID: <20061130144807.GA16474@infradead.org> (raw)
In-Reply-To: <200611271826.kARIQYRi032717@hera.kernel.org>
On Mon, Nov 27, 2006 at 06:26:34PM +0000, Eric Van Hensbergen wrote:
> This is the first cut of a device-mapper target which provides a write-back
> or write-through block cache. It is intended to be used in conjunction with
> remote block devices such as iSCSI or ATA-over-Ethernet, particularly in
> cluster situations.
>
> In performance tests with iSCSI, gave peformance improvements of 2-10x that
> of iSCSI alone when Postmark or Bonnie loads were applied from 8 clients to
> a single server. Evidence suggests even greater differences on larger
> clusters. A detailed performance analysis will be vailable shortly via a
> technical report on IBM's CyberDigest.
>
> This module was developed during an intership at IBM Research by
> Ming Zhao. Please direct comments to both Ming and myself.
I don't quite understand the need for this. Do you need this module
because your iscsi target doesn't use the pagecache on the server?
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Eric Van Hensbergen <ericvh@hera.kernel.org>
Cc: linux-kernel@vger.kernel.org, dm-devel@redhat.com,
ming@acis.ufl.edu, ericvh@gmail.com
Subject: Re: [RFC][PATCH] dm-cache: block level disk cache target for device mapper
Date: Thu, 30 Nov 2006 14:48:07 +0000 [thread overview]
Message-ID: <20061130144807.GA16474@infradead.org> (raw)
In-Reply-To: <200611271826.kARIQYRi032717@hera.kernel.org>
On Mon, Nov 27, 2006 at 06:26:34PM +0000, Eric Van Hensbergen wrote:
> This is the first cut of a device-mapper target which provides a write-back
> or write-through block cache. It is intended to be used in conjunction with
> remote block devices such as iSCSI or ATA-over-Ethernet, particularly in
> cluster situations.
>
> In performance tests with iSCSI, gave peformance improvements of 2-10x that
> of iSCSI alone when Postmark or Bonnie loads were applied from 8 clients to
> a single server. Evidence suggests even greater differences on larger
> clusters. A detailed performance analysis will be vailable shortly via a
> technical report on IBM's CyberDigest.
>
> This module was developed during an intership at IBM Research by
> Ming Zhao. Please direct comments to both Ming and myself.
I don't quite understand the need for this. Do you need this module
because your iscsi target doesn't use the pagecache on the server?
next prev parent reply other threads:[~2006-11-30 14:48 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-27 18:26 [RFC][PATCH] dm-cache: block level disk cache target for device mapper Eric Van Hensbergen
2006-11-27 18:47 ` bert hubert
2006-11-27 19:55 ` Eric Van Hensbergen
2006-12-02 1:21 ` Ming Zhang
2006-12-02 1:21 ` [dm-devel] " Ming Zhang
2006-12-02 18:28 ` Ming Zhao
2006-12-02 18:28 ` [dm-devel] " Ming Zhao
2006-12-02 18:35 ` Ming Zhang
2006-12-02 18:35 ` [dm-devel] " Ming Zhang
2006-11-30 11:32 ` [dm-devel] " Jens Wilke
2006-11-30 16:24 ` Eric Van Hensbergen
2006-11-30 16:24 ` [dm-devel] " Eric Van Hensbergen
2006-11-30 20:07 ` Jens Wilke
2006-12-01 4:49 ` Ming Zhao
2006-12-01 7:16 ` Ming Zhao
2006-12-01 7:16 ` [dm-devel] " Ming Zhao
2006-12-01 10:30 ` Jens Wilke
2006-11-30 14:48 ` Christoph Hellwig [this message]
2006-11-30 14:48 ` Christoph Hellwig
2006-12-11 18:54 ` Eric Van Hensbergen
2006-12-11 18:54 ` Eric Van Hensbergen
2006-12-11 22:31 ` Heinz Mauelshagen
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