From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <001601c2c393$6730dea0$0400a8c0@venkat> From: "abbireddy venkatram reddy" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0013_01C2C3DE.D70DD840" Subject: [linux-lvm] Problem with 1.2Tera byte. Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Date: Fri Jan 24 04:32:01 2003 List-Id: To: linux-lvm@sistina.com This is a multi-part message in MIME format. ------=_NextPart_000_0013_01C2C3DE.D70DD840 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi, I have installed LVM and kernel patch on a Linux box which contains = 3ware RAID controller ,1.2Tera of IDEs, 1024MB RAM. I have created 3 = Logical volumes of each 50GB and for each LV created 3 snaps of same = size. But when every I am dumping data in a large extend to the LVs the = system is getting very slow and hangs for some times. then I have deleted all the snapshots what ever I have created then it = works fine. is any problem with snapshots? or LVM patch? or LVM ?..please help me. with Regards, venkat. ------=_NextPart_000_0013_01C2C3DE.D70DD840 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi,

I have installed LVM and kernel = patch on a=20 Linux box which contains 3ware RAID controller ,1.2Tera of IDEs, = 1024MB=20 RAM. I have created 3 Logical volumes of each 50GB and for each LV = created 3=20 snaps of same size.

But when every I am dumping data = in a large=20 extend to the LVs the system is getting very slow and hangs for some=20 times.

then I have deleted all the = snapshots what=20 ever I have created then it works fine.

is any problem with snapshots? or = LVM patch?=20 or LVM ?..please help me.

with Regards,

venkat.

------=_NextPart_000_0013_01C2C3DE.D70DD840-- From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jose Luis Domingo Lopez Subject: Re: [linux-lvm] Problem with 1.2Tera byte. Message-ID: <20030124200057.GA2370@localhost> References: <001601c2c393$6730dea0$0400a8c0@venkat> Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: <001601c2c393$6730dea0$0400a8c0@venkat> Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Date: Fri Jan 24 14:02:01 2003 List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-lvm@sistina.com On Friday, 24 January 2003, at 19:28:57 +0900, abbireddy venkatram reddy wrote: > I have installed LVM and kernel patch on a Linux box which contains 3ware RAID controller ,1.2Tera of IDEs, 1024MB RAM. I have created 3 Logical volumes of each 50GB and for each LV created 3 snaps of same size. > I don't have an explanation for the slowdown you are experiencing with "snapshots", but remember that snapshots hold the same data as the LV the come from, but the snapshot size must be only large enough to hold the changes made to the original LV during the snapshot lifetime. That is, if your LV are 50 GB long, and there is no much write activity on them, snapshots of just a couple of GB (or even less) should be perfectly reasonable for your setup. Try this and report if the slowdown still continues. Regards, -- Jose Luis Domingo Lopez Linux Registered User #189436 Debian Linux Sid (Linux 2.4.20-xfs)