From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Vladimir V. Saveliev" Subject: Re: setfacl curiously slow Date: Tue, 12 Sep 2006 23:23:00 +0400 Message-ID: <200609122323.00866.vs@namesys.com> References: Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: Content-Disposition: inline List-Id: Content-Type: text/plain; charset="us-ascii" To: Dragan Krnic , reiserfs-list@namesys.com Cc: support@namesys.com Hello On Tuesday 12 September 2006 23:23, Dragan Krnic wrote: > Hi, everyone, > > I've migrated important user data from an older PC to some fairly > contemporary hardware. > > The old hardware was Intel Pentium 4 3 GHz, single CPU, 2 GB RAM, > 6 x 250 GB S-ATA connected via 2 Promise Tx2 cards and the on-board > 2-port controller, managed as a software raid5 with 5 disks and 1 spare, > with 83% used up, which is about 790 gigibytes net. > > The new hardware is a Tyan S2895, 2 dual-core Opteron280, 8 GB RAM, > 8 x 500 GB S-ATA connected via Areca ARC-1120 133 MHz/64-bit PCI-X > 8-port, managed as a hardware raid5 with 8 disks no spares. > > The tar backup of the old machine to a second similarly new PC ran at > about 30 MB/s. The tar restore onto the new hardware was about twice as > fast, as was expected. > > But! The restoration of ACLs took an enormous amount of time. > > The ACLs backup was created on the old machine in about 28 minutes, > but it took 74 minutes to restore the ACLs on the new hardware. During > that time the disk activity looked like what you can see in the enclosed > PDF file. Short intervals of intense writing with much longer intervals of > inactivity. In top the process "setfacl --restore=acls.local" and "pdflush" > were in state "D" all the time. From time to time a process "reiserfsd" > joined them in the same state. > > A login to the computer during that time was considerably slowed down. > Otherwise the computer was still free from any load. > > I'm not sure if that's a problem or just normal but you will know better. > I believe Jeff as reiserfs acl author will be interested by this question. But may I ask you to try your test on ext2 to check whether ACL restoring is much faster there? > There were 796,115 files to apply ACLs to. > > Best regards, > Dragan > > ---------- Forwarded message ---------- > From: shopper@uk.worldpay.com > Date: 12.09.2006 20:55 > Subject: Confirmation: CARD Transaction > To: dkrnic@googlemail.com > > > Transaction Confirmation Please retain for your records > Thank you > > Your transaction has been processed on behalf of Namesys. > Transaction details: > > *Transaction for the value of:* USD 25.00 > *Description:* Support payment > *From:* Namesys > *Merchant's cart ID:* 00001 > *Authorisation Date/Time:* 12/Sep/2006 18:55:08 > *Transaction ID:* 194613136 > This is not a tax receipt. > If you have a query about your order > > This confirmation only indicates that your transaction has been processed > successfully. It does not indicate that your order has been accepted. It is > the responsibility of Namesys to confirm that your order has been accepted, > and to deliver any goods or services you have ordered. > > If you have any questions about your order (including refunds, delivery > status, wanting to cancel your order), please email Namesys at: > support@namesys.com, with the transaction details listed above. > Thank you for shopping with Namesys > Your transaction has been processed by WorldPay on behalf of Namesys. > > *Other queries about your transaction?* Visit: > http://support.worldpay.com/shopper/