Gabriele Just so I understand. What is wrong with a zfs pool on the client machine and zfs send /receive to the server machine which can then back it up to tape? Why do you need zfs in the mix?
John ________________________________ From: Gabriele Bulfon via illumos-discuss [[email protected]] Sent: 10 July 2014 08:09 To: Reginald Beardsley; [email protected] Subject: Re: [discuss] zfs lofi file pool double mount NFS is slow, expecially with small files. So what I'm trying to do is: - have the NFS client run his daily work on local zfs pools, fast. - have periodic zfs incremental send of these pools on the NFS lofi files - have the NFS server access these lofi files periodically to backup them old manner (tape) Just experimenting, to have some kind of zfs incremental backup over nfs ---------------------------------------------------------------------------------- Da: Reginald Beardsley <[email protected]> A: [email protected] Gabriele Bulfon <[email protected]> Data: 9 luglio 2014 18.16.16 CEST Oggetto: Re: [discuss] zfs lofi file pool double mount What are you trying to do? It's not possible for the server to have RO access and the client have R/W access. The server has to have R/W to service the client requests. As for making certain clients RO and other R/W, that's provided by NFS. You can even make the NFS mountpoint RO on the server, but the physical mountpoint still has to be R/W at least for nfsd. You *could* make the physical mountpoint completely inaccessible to anything other than nfsd by setting ownership and permissions properly. You can actually do pretty much anything you can imagine using NFS maps. Folding maps based on system architecture is one of my favorites, i.e. /app/bin -> /app/${ARCH}/bin, but it's not needed much now that so much of the *nix world has converged on Linux. Back during the workstation wars it was very useful. But again, what's the objective? Reg -------------------------------------------- On Wed, 7/9/14, Gabriele Bulfon via illumos-discuss <[email protected]> wrote: Subject: [discuss] zfs lofi file pool double mount To: [email protected] Date: Wednesday, July 9, 2014, 8:44 AM Hi, as an experiment. Let's say I have a zfs fs shared as an NFS resource to another illumos client. Let's say I have created a 152GB file on this resrouce. Let's say I have added the file as a lofi dev on the NFS server, and created a 512GB zpool on it. Finally, let's say I have added the file as a lofi dev on the NFS client too. Now I can export / import the pool both from the NFS server, and the NFS client. Obviously I can't import the pool from both machines. But...what if one would "import -f -o readonly=on" and the other would import -f read/write? Would it be possible? This would let me zfs send the client pool to the lofi pool on the NFS share, while have the server be able to read the contained files. Is it safe? Gabriele. illumos-developer | Archives | Modify Your Subscription illumos-discuss | Archives | Modify Your Subscription illumos-discuss | Archives<https://www.listbox.com/member/archive/182180/=now> [https://www.listbox.com/images/feed-icon-10x10.jpgaa3a5f8.jpg?uri=aHR0cHM6Ly93d3cubGlzdGJveC5jb20vaW1hZ2VzL2ZlZWQtaWNvbi0xMHgxMC5qcGc] <https://www.listbox.com/member/archive/rss/182180/24506464-f4272eae> | Modify<https://www.listbox.com/member/?&;> Your Subscription [https://www.listbox.com/images/listbox-logo-small.pngaa3a5f8.png?uri=aHR0cHM6Ly93d3cubGlzdGJveC5jb20vaW1hZ2VzL2xpc3Rib3gtbG9nby1zbWFsbC5wbmc] <http://www.listbox.com> _______________________________________________________________________ The contents of this e-mail and any attachment(s) are strictly confidential and are solely for the person(s) at the e-mail address(es) above. If you are not an addressee, you may not disclose, distribute, copy or use this e-mail, and we request that you send an e-mail to [email protected] and delete this e-mail. Stirling Dynamics Ltd. accepts no legal liability for the contents of this e-mail including any errors, interception or interference, as internet communications are not secure. Any views or opinions presented are solely those of the author and do not necessarily represent those of Stirling Dynamics Ltd. Registered In England No. 2092114 Registered Office: 26 Regent Street, Clifton, Bristol. BS8 4HG VAT no. GB 464 6551 29 _______________________________________________________________________ This e-mail has been scanned for all viruses MessageLabs. ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
