Re: [zfs-discuss] Understanding ZFS replication

2009-01-18 Thread Toby Thain
On 18-Jan-09, at 11:56 PM, Tim wrote: On Sun, Jan 18, 2009 at 10:12 PM, Richard Elling wrote: This is not quite correct. ZFS will attempt to place the copies on different vdevs. On the same vdev, it will try to place it somewhere which is not contiguous (spatial diversity). I'm curiou

Re: [zfs-discuss] cifs perfomance

2009-01-22 Thread Toby Thain
On 21-Jan-09, at 9:11 PM, Brandon High wrote: > On Wed, Jan 21, 2009 at 5:40 PM, Bob Friesenhahn > wrote: >> Several people reported this same problem. They changed their >> ethernet adaptor to an Intel ethernet interface and the performance >> problem went away. It was not ZFS's fault. > > It

Re: [zfs-discuss] how to fix zpool with corrupted disk?

2009-01-26 Thread Toby Thain
On 26-Jan-09, at 6:21 PM, Jakov Sosic wrote: >>> So I wonder now, how to fix this up? Why doesn't >> scrub overwrite bad data with good data from first >> disk? >> >> ZFS doesn't know why the errors occurred, the most >> likely scenario would be a >> bad disk -- in which case you'd need to replac

Re: [zfs-discuss] how to fix zpool with corrupted disk?

2009-01-27 Thread Toby Thain
On 26-Jan-09, at 8:15 PM, Miles Nordin wrote: >>>>>> "js" == Jakov Sosic writes: >>>>>> "tt" == Toby Thain writes: > > js> Yes but that will do the complete resilvering, and I just want > js> to fix the corrupted bl

Re: [zfs-discuss] ZFS extended ACL

2009-01-29 Thread Toby Thain
On 29-Jan-09, at 2:17 PM, Ross wrote: > Yeah, breaking functionality in one of the main reasons people are > going to be trying OpenSolaris is just dumb... really, really dumb. > > One thing Linux, Windows, OS/X, etc all get right is that they're > pretty easy to use right out of the box. Th

Re: [zfs-discuss] ZFS extended ACL

2009-01-29 Thread Toby Thain
On 29-Jan-09, at 4:53 PM, Volker A. Brandt wrote: >> Given the massive success of GNU based systems (Linux, OS X, *BSD) > > Ouch! Neither OSX nor *BSD are GNU-based. I meant, extensive GNU userland (in OS X's case). (sorry Ian) --Toby > They do ship with > GNU-related things but that's been

Re: [zfs-discuss] ZFS snapshot splitting & joining

2009-02-04 Thread Toby Thain
On 4-Feb-09, at 6:19 AM, Michael McKnight wrote: > Hello everyone, > > I am trying to take ZFS snapshots (ie. zfs send) and burn them to > DVD's for offsite storage. In many cases, the snapshots greatly > exceed the 8GB I can stuff onto a single DVD-DL. > > In order to make this work, I have

Re: [zfs-discuss] ZFS snapshot splitting & joining

2009-02-04 Thread Toby Thain
On 4-Feb-09, at 1:01 PM, Miles Nordin wrote: ... Here are the > problems, again, with archiving 'zfs send' output: > ... >EXTREMELY corruption-sensitive. 'tar' and zpool images both >detect, report, work around, flipped bits. I know this was discussed a while back, but in what sense does

Re: [zfs-discuss] ZFS snapshot splitting & joining

2009-02-04 Thread Toby Thain
On 4-Feb-09, at 2:29 PM, Bob Friesenhahn wrote: > On Wed, 4 Feb 2009, Toby Thain wrote: >>> In order to make this work, I have used the "split" utility ... >>> I use the following command to convert them back into a single file: >>> #cat mypictures.zfs

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-09 Thread Toby Thain
On 9-Feb-09, at 6:17 PM, Miles Nordin wrote: >> "ok" == Orvar Korvar writes: > > ok> You are not using ZFS correctly. > ok> You have misunderstood how it is used. If you dont follow the > ok> manual (which you havent) then any filesystem will cause > ok> problems and corrupti

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Toby Thain
On 10-Feb-09, at 1:03 PM, Charles Binford wrote: Jeff, what do you mean by "disks that simply blow off write ordering."? My experience is that most enterprise disks are some flavor of SCSI, and host SCSI drivers almost ALWAYS use simple queue tags, implying the target is free to re-order th

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-10 Thread Toby Thain
On 10-Feb-09, at 1:05 PM, Peter Schuller wrote: YES! I recently discovered that VirtualBox apparently defaults to ignoring flushes, which would, if true, introduce a failure mode generally absent from real hardware (and eventually resulting in consistency problems quite unexpected to the user w

Re: [zfs-discuss] Does your device honor write barriers?

2009-02-10 Thread Toby Thain
On 10-Feb-09, at 7:41 PM, Jeff Bonwick wrote: wellif you want a write barrier, you can issue a flush-cache and wait for a reply before releasing writes behind the barrier. You will get what you want by doing this for certain. Not if the disk drive just *ignores* barrier and flush-cach

Re: [zfs-discuss] Does your device honor write barriers?

2009-02-10 Thread Toby Thain
On 10-Feb-09, at 10:36 PM, Frank Cusack wrote: On February 10, 2009 4:41:35 PM -0800 Jeff Bonwick wrote: Not if the disk drive just *ignores* barrier and flush-cache commands and returns success. Some consumer drives really do exactly that. ouch. If it were possible to detect such disks

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Toby Thain
On 11-Feb-09, at 10:08 AM, David Dyer-Bennet wrote: On Tue, February 10, 2009 23:43, Uwe Dippel wrote: 1. Can the relevant people confirm that drives might turn dead when leaving a pool at unfortunate moments? Despite of complete physical integrity? [I'd really appreciate an answer here, bec

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Toby Thain
On 11-Feb-09, at 11:19 AM, Tim wrote: ... And yes, I do keep checksums of all the data sitting on them and periodically check it. So, for all of your ranting and raving, the fact remains even a *crappy* filesystem like fat32 manages to handle a hot unplug without any prior notice without

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Toby Thain
On 11-Feb-09, at 5:52 PM, David Dyer-Bennet wrote: On Wed, February 11, 2009 15:52, Bob Friesenhahn wrote: On Wed, 11 Feb 2009, Tim wrote: Right, except the OP stated he unmounted the filesystem in question, and it was the *ONLY* one on the drive, meaning there is absolutely 0 chance o

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Toby Thain
On 11-Feb-09, at 7:16 PM, Uwe Dippel wrote: I need to disappoint you here, LED inactive for a few seconds is a very bad indicator of pending writes. Used to experience this on a stick on Ubuntu, which was silent until the 'umount' and then it started to write for some 10 seconds. On the

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-11 Thread Toby Thain
On 11-Feb-09, at 9:30 PM, Uwe Dippel wrote: Toby, sad that you fall for the last resort of the marketing droids here. All manufactures (and there are only a few left) will sue the hell out of you if you state that their drives don't 'sync'. And each and every drive I have ever used did.

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-12 Thread Toby Thain
On 12-Feb-09, at 3:02 PM, Tim wrote: On Thu, Feb 12, 2009 at 11:31 AM, David Dyer-Bennet wrote: On Thu, February 12, 2009 10:10, Ross wrote: > Of course, that does assume that devices are being truthful when they say > that data has been committed, but a little data loss from badly

Re: [zfs-discuss] ZFS: unreliable for professional usage?

2009-02-12 Thread Toby Thain
On 12-Feb-09, at 7:02 PM, Eric D. Mudama wrote: On Thu, Feb 12 at 21:45, Mattias Pantzare wrote: A read of data in the disk cache will be read from the disk cache. You can't tell the disk to ignore its cache and read directly from the plater. The only way to test this is to write and the re

Re: [zfs-discuss] ZFS on SAN?

2009-02-14 Thread Toby Thain
On 14-Feb-09, at 2:40 AM, Andras Spitzer wrote: Damon, Yes, we can provide simple concat inside the array (even though today we provide RAID5 or RAID1 as our standard, and using Veritas with concat), the question is more of if it's worth it to switch the redundancy from the array to the

Re: [zfs-discuss] ZFS on SAN?

2009-02-17 Thread Toby Thain
On 17-Feb-09, at 3:01 PM, Scott Lawson wrote: Hi All, ... I have seen other people discussing power availability on other threads recently. If you want it, you can have it. You just need the business case for it. I don't buy the comments on UPS unreliability. Hi, I remarked on it. FWIW, m

Re: [zfs-discuss] qmail on zfs

2009-02-17 Thread Toby Thain
On 17-Feb-09, at 8:28 PM, Asif Iqbal wrote: On Tue, Feb 17, 2009 at 5:52 PM, Robert Milkowski wrote: Hello Asif, Tuesday, February 17, 2009, 7:43:41 PM, you wrote: AI> Hi All AI> Does anyone have any experience on running qmail on solaris 10 with ZFS only? AI> I would appreciate if yo

Re: [zfs-discuss] ZFS on SAN?

2009-02-17 Thread Toby Thain
On 17-Feb-09, at 9:35 PM, Scott Lawson wrote: Toby Thain wrote: On 17-Feb-09, at 3:01 PM, Scott Lawson wrote: Hi All, ... I have seen other people discussing power availability on other threads recently. If you want it, you can have it. You just need the business case for it. I don&#

Re: [zfs-discuss] zfs streams & data corruption

2009-02-24 Thread Toby Thain
On 24-Feb-09, at 1:37 PM, Mattias Pantzare wrote: On Tue, Feb 24, 2009 at 19:18, Nicolas Williams wrote: On Mon, Feb 23, 2009 at 10:05:31AM -0800, Christopher Mera wrote: I recently read up on Scott Dickson's blog with his solution for jumpstart/flashless cloning of ZFS root filesystem boxes

Re: [zfs-discuss] zfs streams & data corruption

2009-02-25 Thread Toby Thain
On 25-Feb-09, at 9:53 AM, Moore, Joe wrote: Miles Nordin wrote: that SQLite2 should be equally as tolerant of snapshot backups as it is of cord-yanking. The special backup features of databases including ``performing a checkpoint'' or whatever, are for systems incapable of snapshots, wh

Re: [zfs-discuss] zfs streams & data corruption

2009-02-25 Thread Toby Thain
On 25-Feb-09, at 1:08 PM, Miles Nordin wrote: "jm" == Moore, Joe writes: jm> This is correct. The general term for these sorts of jm> point-in-time backups is "crash consistant". phew, thanks, glad I wasn't talking out my ass again. jm> In-flight transactions (ones that have n

Re: [zfs-discuss] Comstar production-ready?

2009-03-04 Thread Toby Thain
On 4-Mar-09, at 2:07 AM, Stephen Nelson-Smith wrote: Hi, I recommended a ZFS-based archive solution to a client needing to have a network-based archive of 15TB of data in a remote datacentre. I based this on an X2200 + J4400, Solaris 10 + rsync. This was enthusiastically received, to the ext

Re: [zfs-discuss] zfs related google summer of code ideas - your vote

2009-03-04 Thread Toby Thain
On 4-Mar-09, at 1:28 PM, Bob Friesenhahn wrote: I don't know if anyone has noticed that the topic is "google summer of code". There is only so much that a starving college student can accomplish from a dead-start in 1-1/2 months. The ZFS equivalent of eliminating world hunger is not amon

Re: [zfs-discuss] zfs related google summer of code ideas - your vote

2009-03-04 Thread Toby Thain
On 4-Mar-09, at 7:35 PM, Gary Mills wrote: On Wed, Mar 04, 2009 at 01:20:42PM -0500, Miles Nordin wrote: "gm" == Gary Mills writes: gm> I suppose my RFE for two-level ZFS should be included, Not that my opinion counts for much, but I wasn't deaf to it---I did respond. I appreciate th

Re: [zfs-discuss] zfs related google summer of code ideas - your vote

2009-03-05 Thread Toby Thain
On 5-Mar-09, at 2:03 PM, Miles Nordin wrote: "gm" == Gary Mills writes: gm> There are many different components that could contribute to gm> such errors. yes of course. gm> Since only the lower ZFS has data redundancy, only it can gm> correct the error. um, no? ... For wri

Re: [zfs-discuss] ZFS GSoC ideas page rough draft

2009-03-14 Thread Toby Thain
On 14-Mar-09, at 12:09 PM, Blake wrote: I just thought of an enhancement to zfs that would be very helpful in disaster recovery situations - having zfs cache device serial/model numbers - the information we see in cfgadm -v. +1 I haven't needed this but it sounds very sensible. I can imagine

Re: [zfs-discuss] How do I "mirror" zfs rpool, x4500?

2009-03-17 Thread Toby Thain
On 17-Mar-09, at 3:32 PM, cindy.swearin...@sun.com wrote: Neal, You'll need to use the text-based initial install option. The steps for configuring a ZFS root pool during an initial install are covered here: http://opensolaris.org/os/community/zfs/docs/ Page 114: Example 4–1 Initial Install

Re: [zfs-discuss] Data size grew.. with compression on

2009-04-10 Thread Toby Thain
On 10-Apr-09, at 2:03 PM, Harry Putnam wrote: David Magda writes: On Apr 7, 2009, at 16:43, OpenSolaris Forums wrote: if you have a snapshot of your files and rsync the same files again, you need to use "--inplace" rsync option , otherwise completely new blocks will be allocated for the ne

Re: [zfs-discuss] ZIL SSD performance testing... -IOzone works great, others not so great

2009-04-10 Thread Toby Thain
On 10-Apr-09, at 5:05 PM, Mark J Musante wrote: On Fri, 10 Apr 2009, Patrick Skerrett wrote: degradation) when these write bursts come in, and if I could buffer them even for 60 seconds, it would make everything much smoother. ZFS already batches up writes into a transaction group, which

Re: [zfs-discuss] Errors on mirrored drive

2009-04-15 Thread Toby Thain
On 15-Apr-09, at 8:31 PM, Frank Middleton wrote: On 04/15/09 14:30, Bob Friesenhahn wrote: On Wed, 15 Apr 2009, Frank Middleton wrote: zpool status shows errors after a pkg image-update followed by a scrub. If a corruption occured in the main memory, the backplane, or the disk controller

Re: [zfs-discuss] How recoverable is an 'unrecoverable error'?

2009-04-16 Thread Toby Thain
On 16-Apr-09, at 5:27 PM, Florian Ermisch wrote: Uwe Dippel schrieb: Bob Friesenhahn wrote: Since it was not reported that user data was impacted, it seems likely that there was a read failure (or bad checksum) for ZFS metadata which is redundantly stored. (Maybe I am too much of a lingu

Re: [zfs-discuss] Errors on mirrored drive

2009-04-17 Thread Toby Thain
On 17-Apr-09, at 11:49 AM, Frank Middleton wrote: ... One might argue that a machine this flaky should be retired, but it is actually working quite well, If it has bad memory, you won't get much useful work done on it until the memory is replaced - unless you want to risk your data with r

Re: [zfs-discuss] [on-discuss] Reliability at power failure?

2009-04-19 Thread Toby Thain
On 19-Apr-09, at 10:38 AM, Uwe Dippel wrote: casper@sun.com wrote: We are back at square one; or, at the subject line. I did a zpool status -v, everything was hunky dory. Next, a power failure, 2 hours later, and this is what zpool status -v thinks: zpool status -v pool: rpool state:

Re: [zfs-discuss] Errors on mirrored drive

2009-05-22 Thread Toby Thain
On 22-May-09, at 5:24 PM, Frank Middleton wrote: There have been a number of threads here on the reliability of ZFS in the face of flaky hardware. ZFS certainly runs well on decent (e.g., SPARC) hardware, but isn't it reasonable to expect it to run well on something less well engineered?

Re: [zfs-discuss] Errors on mirrored drive

2009-05-26 Thread Toby Thain
On 26-May-09, at 10:21 AM, Frank Middleton wrote: On 05/26/09 03:23, casper@sun.com wrote: And where exactly do you get the second good copy of the data? From the first. And if it is already bad, as noted previously, this is no worse than the UFS/ext3 case. If you want total freedom fro

Re: [zfs-discuss] Errors on mirrored drive

2009-05-26 Thread Toby Thain
On 25-May-09, at 11:16 PM, Frank Middleton wrote: On 05/22/09 21:08, Toby Thain wrote: Yes, the important thing is to *detect* them, no system can run reliably with bad memory, and that includes any system with ZFS. Doing nutty things like calculating the checksum twice does not buy

Re: [zfs-discuss] Apple Removes Nearly All Reference To ZFS

2009-06-10 Thread Toby Thain
On 10-Jun-09, at 7:25 PM, Alex Lam S.L. wrote: On Thu, Jun 11, 2009 at 2:08 AM, Aaron Blew wrote: That's quite a blanket statement. MANY companies (including Oracle) purchased Xserve RAID arrays for important applications because of their price point and capabilities. You easily could buy

Re: [zfs-discuss] zfs on 32 bit?

2009-06-16 Thread Toby Thain
On 16-Jun-09, at 6:22 PM, Ray Van Dolson wrote: On Tue, Jun 16, 2009 at 03:16:09PM -0700, milosz wrote: yeah i pretty much agree with you on this. the fact that no one has brought this up before is a pretty good indication of the demand. there are about 1000 things i'd rather see fixed/improv

Re: [zfs-discuss] APPLE: ZFS need bug corrections instead of new func! Or?

2009-06-17 Thread Toby Thain
On 17-Jun-09, at 7:37 AM, Orvar Korvar wrote: Ok, so you mean the comments are mostly FUD and bull shit? Because there are no bug reports from the whiners? Could this be the case? It is mostly FUD? Hmmm...? Having read the thread, I would say "without a doubt". Slashdot was never the pl

Re: [zfs-discuss] APPLE: ZFS need bug corrections instead of new func! Or?

2009-06-17 Thread Toby Thain
On 17-Jun-09, at 5:42 PM, Miles Nordin wrote: "bmm" == Bogdan M Maryniuk writes: "tt" == Toby Thain writes: "ok" == Orvar Korvar writes: tt> Slashdot was never the place to go for accurate information tt> about ZFS. again, the posts in t

Re: [zfs-discuss] APPLE: ZFS need bug corrections instead of new func! Or?

2009-06-18 Thread Toby Thain
On 18-Jun-09, at 12:14 PM, Miles Nordin wrote: "bmm" == Bogdan M Maryniuk writes: "tt" == Toby Thain writes: ... tt> /. is no person... ... you and I both know it's plausible speculation that Apple delayed unleashing ZFS on their consumers because of

Re: [zfs-discuss] Speeding up resilver on x4500

2009-06-23 Thread Toby Thain
On 23-Jun-09, at 1:58 PM, Erik Trimble wrote: Richard Elling wrote: Erik Trimble wrote: All this discussion hasn't answered one thing for me: exactly _how_ does ZFS do resilvering? Both in the case of mirrors, and of RAIDZ[2] ? I've seen some mention that it goes in cronological order

Re: [zfs-discuss] De-duplication: possible to identify duplicate files?

2009-07-14 Thread Toby Thain
On 14-Jul-09, at 5:18 PM, Orvar Korvar wrote: With dedup, will it be possible somehow to identify files that are identical but has different names? Then I can find and remove all duplicates. I know that with dedup, removal is not really needed because the duplicate will just be a reference

Re: [zfs-discuss] Another user looses his pool (10TB) in this case and 40 days work

2009-07-19 Thread Toby Thain
On 19-Jul-09, at 7:12 AM, Russel wrote: Guys guys please chill... First thanks to the info about virtualbox option to bypass the cache (I don't suppose you can give me a reference for that info? (I'll search the VB site :-)) I posted about that insane default, six months ago. Obviously ZFS

Re: [zfs-discuss] Another user looses his pool (10TB) in this case and 40 days work

2009-07-20 Thread Toby Thain
On 20-Jul-09, at 6:26 AM, Russel wrote: Well I did have a UPS on the machine :-) but the machine hung and I had to power it off... (yep it was vertual, but that happens on direct HW too, As has been discussed here before, the failure modes are different as the layer stack from filesystem t

Re: [zfs-discuss] The importance of ECC RAM for ZFS

2009-07-24 Thread Toby Thain
On 24-Jul-09, at 6:41 PM, Frank Middleton wrote: On 07/24/09 04:35 PM, Bob Friesenhahn wrote: Regardless, it [VirtualBox] has committed a crime. But ZFS is a journalled file system! Any hardware can lose a flush; No, the problematic default in VirtualBox is flushes being *ignored*, whic

Re: [zfs-discuss] Another user looses his pool (10TB) in this case and 40 days work

2009-07-25 Thread Toby Thain
On 25-Jul-09, at 3:32 PM, Frank Middleton wrote: On 07/25/09 02:50 PM, David Magda wrote: Yes, it can be affected. If the snapshot's data structure / record is underneath the corrupted data in the tree then it won't be able to be reached. Can you comment on if/how mirroring or raidz mitigat

Re: [zfs-discuss] Another user looses his pool (10TB) in this case and 40 days work

2009-07-26 Thread Toby Thain
with metatdata other than to manage it. Now if you were too lazy to bother to follow the instructions properly, we could end up with bizarre things. This is what happens when storage lies and re-orders writes across boundaries. On 07/25/09 07:34 PM, Toby Thain wrote: The problem is assumed

Re: [zfs-discuss] Help with setting up ZFS

2009-07-27 Thread Toby Thain
On 27-Jul-09, at 5:46 AM, erik.ableson wrote: The zfs send command generates a differential file between the two selected snapshots so you can send that to anything you'd like. The catch of course is that then you have a collection of files on your Linux box that are pretty much useless s

Re: [zfs-discuss] Another user looses his pool (10TB) in this case and 40 days work

2009-07-27 Thread Toby Thain
On 27-Jul-09, at 3:44 PM, Frank Middleton wrote: On 07/27/09 01:27 PM, Eric D. Mudama wrote: Everyone on this list seems to blame lying hardware for ignoring commands, but disks are relatively mature and I can't believe that major OEMs would qualify disks or other hardware that willingly ig

Re: [zfs-discuss] Another user looses his pool (10TB) in this case and 40

2009-07-31 Thread Toby Thain
On 31-Jul-09, at 7:15 PM, Richard Elling wrote: wow, talk about a knee jerk reaction... On Jul 31, 2009, at 3:23 PM, Dave Stubbs wrote: I don't mean to be offensive Russel, but if you do ever return to ZFS, please promise me that you will never, ever, EVER run it virtualized on top of NTFS (

Re: [zfs-discuss] Another user looses his pool (10TB) in this case and 40 days work

2009-08-04 Thread Toby Thain
On 4-Aug-09, at 9:28 AM, Roch Bourbonnais wrote: Le 26 juil. 09 à 01:34, Toby Thain a écrit : On 25-Jul-09, at 3:32 PM, Frank Middleton wrote: On 07/25/09 02:50 PM, David Magda wrote: Yes, it can be affected. If the snapshot's data structure / record is underneath the corrupted

Re: [zfs-discuss] Books on File Systems and File System Programming

2009-08-14 Thread Toby Thain
On 14-Aug-09, at 11:14 AM, Peter Schow wrote: On Thu, Aug 13, 2009 at 05:02:46PM -0600, Louis-Fr?d?ric Feuillette wrote: I saw this question on another mailing list, and I too would like to know. And I have a couple questions of my own. == Paraphrased from other list == Does anyone have any

Re: [zfs-discuss] White box server for OpenSolaris

2009-09-25 Thread Toby Thain
On 25-Sep-09, at 2:58 PM, Frank Middleton wrote: On 09/25/09 11:08 AM, Travis Tabbal wrote: ... haven't heard if it's a known bug or if it will be fixed in the next version... Out of courtesy to our host, Sun makes some quite competitive X86 hardware. I have absolutely no idea how difficult

Re: [zfs-discuss] Which directories must be part of rpool?

2009-09-26 Thread Toby Thain
On 26-Sep-09, at 9:56 AM, Frank Middleton wrote: On 09/25/09 09:58 PM, David Magda wrote: ... Similar definition for [/tmp] Linux FWIW: Yes, but unless they fixed it recently (>=RHFC11), Linux doesn't actually nuke /tmp, which seems to be mapped to disk. One side effect is that (like M

Re: [zfs-discuss] X2100 not hotswap, was Re: External drive enclosures + Sun Server for massstorage

2007-01-23 Thread Toby Thain
On 23-Jan-07, at 4:51 PM, Bart Smaalders wrote: Frank Cusack wrote: yes I am an experienced Solaris admin and know all about devfsadm :-) and the older disks command. It doesn't help in this case. I think it's a BIOS thing. Linux and Windows can't see IDE drives that aren't there at boot tim

Re: [zfs-discuss] X2100 not hotswap, was Re: External drive enclosures + Sun Server for massstorage

2007-01-25 Thread Toby Thain
On 25-Jan-07, at 5:09 AM, Frank Cusack wrote: On January 23, 2007 8:11:24 PM -0200 Toby Thain <[EMAIL PROTECTED]> wrote: Still, would be nice for those of us who bought them. And judging by other posts on this thread it seems just about everyone assumes hotswap "just works&qu

Re: [zfs-discuss] Re: can I use zfs on just a partition?

2007-01-25 Thread Toby Thain
On 25-Jan-07, at 3:56 PM, Robert Milkowski wrote: Hello Tim, Thursday, January 25, 2007, 4:44:34 PM, you wrote: TC> I guess I should clarify what I'm doing. TC> Essentially I'd like to have the / and swap on the first 60GB of TC> the disk. Then use the remaining 100GB as a zfs partition to

Re: [zfs-discuss] Re: ZFS or UFS - what to do?

2007-01-26 Thread Toby Thain
On 26-Jan-07, at 7:29 PM, Selim Daoud wrote: it would be good to have real data and not only guess ot anecdots this story about wrong blocks being written by RAID controllers sounds like the anti-terrorism propaganda we are leaving in: exagerate the facts to catch everyone's attention .It's g

Re: [zfs-discuss] Re: Re: How much do we really want zpool remove?

2007-01-26 Thread Toby Thain
Oh - and the accounting folks love it when you tell them there's no ongoing cost of ownership - because Joe Screwdriver can swap out a failed Seagate 500Gb SATA drive after he picks up a replacement from Frys on his lunch break! Why do people think this will work? I never could figure it o

Re: [zfs-discuss] zfs rewrite?

2007-01-26 Thread Toby Thain
On 26-Jan-07, at 11:34 PM, Pawel Jakub Dawidek wrote: Hi. What do you guys think about implementing 'zfs/zpool rewrite' command? It'll read every block older than the date when the command was executed and write it again (using standard ZFS COW mechanism, simlar to how resilvering works, bu

Re: [zfs-discuss] zfs rewrite?

2007-01-27 Thread Toby Thain
On 27-Jan-07, at 4:57 AM, Frank Cusack wrote: On January 27, 2007 12:27:17 AM -0200 Toby Thain <[EMAIL PROTECTED]> wrote: On 26-Jan-07, at 11:34 PM, Pawel Jakub Dawidek wrote: 3. I created file system with huge amount of data, where most of the data is read-only. I change my serve

Re: [zfs-discuss] Re: Re: ZFS or UFS - what to do?

2007-01-27 Thread Toby Thain
On 27-Jan-07, at 10:15 PM, Anantha N. Srirama wrote: We had in flight data corruption that EMC faithfully wrote just like NetApp would in your case. Everybody is assuming that corruption or data loss occurs only on disks, it can happen everywhere. In a datacenter SAN you've so many more pa

Re: [zfs-discuss] Re: Re: ZFS or UFS - what to do?

2007-01-27 Thread Toby Thain
On 27-Jan-07, at 10:15 PM, Anantha N. Srirama wrote: ... ZFS will not stop alpha particle induced memory corruption after data has been received by server and verified to be correct. Sadly I've been hit with that as well. My brother points out that you can use a rad hardened CPU. ECC shou

Re: [zfs-discuss] Re: Re: ZFS or UFS - what to do?

2007-01-28 Thread Toby Thain
On 28-Jan-07, at 7:59 AM, [EMAIL PROTECTED] wrote: On 27-Jan-07, at 10:15 PM, Anantha N. Srirama wrote: ... ZFS will not stop alpha particle induced memory corruption after data has been received by server and verified to be correct. Sadly I've been hit with that as well. My brother poi

[zfs-discuss] hot spares - in standby?

2007-01-29 Thread Toby Thain
Hi, This is not exactly ZFS specific, but this still seems like a fruitful place to ask. It occurred to me today that hot spares could sit in standby (spun down) until needed (I know ATA can do this, I'm supposing SCSI does too, but I haven't looked at a spec recently). Does anybody do th

Re: [zfs-discuss] hot spares - in standby?

2007-01-29 Thread Toby Thain
On 29-Jan-07, at 9:04 PM, Al Hopper wrote: On Mon, 29 Jan 2007, Toby Thain wrote: Hi, This is not exactly ZFS specific, but this still seems like a fruitful place to ask. It occurred to me today that hot spares could sit in standby (spun down) until needed (I know ATA can do this, I&#

Re: [zfs-discuss] hot spares - in standby?

2007-01-29 Thread Toby Thain
ldn't happen to a spare drive that was spun up from time to time. In fact this problem would be (mitigated and/or) caught by the periodic health check I suggested. --T http://www.eweek.com/article2/0,1895,1941205,00.asp Would that apply here? Best Regards, Jason On 1/29/07, Toby Tha

Re: [zfs-discuss] Thumper Origins Q

2007-01-30 Thread Toby Thain
On 30-Jan-07, at 5:48 PM, Richard Elling wrote: ... One of the benefits of ZFS is that not only is head synchronization not needed, but also block offsets do not have to be the same. For example, in a traditional mirror, block 1 on device 1 is paired with block 1 on device 2. In ZFS, thi

Re: [zfs-discuss] Implementing fbarrier() on ZFS

2007-02-12 Thread Toby Thain
On 12-Feb-07, at 5:55 PM, Frank Hofmann wrote: On Mon, 12 Feb 2007, Peter Schuller wrote: Hello, Often fsync() is used not because one cares that some piece of data is on stable storage, but because one wants to ensure the subsequent I/O operations are performed after previous I/O operat

Re: [zfs-discuss] File System Filter Driver??

2007-02-26 Thread Toby Thain
On 26-Feb-07, at 11:32 PM, Richard Elling wrote: Rayson Ho wrote: NT kernel has the filter driver framework: http://www.microsoft.com/whdc/driver/filterdrv/default.mspx It seems to be useful for things like FS encrytion and compression... is there any plan to implement something similar in Sol

Re: [zfs-discuss] Re: Re: Efficiency when reading the same file blocks

2007-02-28 Thread Toby Thain
On 28-Feb-07, at 6:43 PM, Erblichs wrote: ZFS Group, My two cents.. Currently, in my experience, it is a waste of time to try to guarantee "exact" location of disk blocks with any FS. ? Sounds like you're confusing logical location with physical location, througho

Re: Re[2]: [zfs-discuss] writes lost with zfs !

2007-03-11 Thread Toby Thain
On 11-Mar-07, at 11:12 PM, Ayaz Anjum wrote: HI ! Well as per my actual post, i created a zfs file as part of Sun cluster HAStoragePlus, and then disconned the FC cable, since there was no active IO hence the failure of disk was not detected, then i touched a file in the zfs filesystem,

Re: Re[2]: [zfs-discuss] writes lost with zfs !

2007-03-11 Thread Toby Thain
On 11-Mar-07, at 11:22 PM, Stuart Low wrote: Heya, I believe Robert and Darren have offered sufficient explanations: You cannot be assured of committed data unless you've sync'd it. You are only risking data loss if your users and/or applications assume data is committed without seeing a comp

Re: [zfs-discuss] Re: Re: update on zfs boot support

2007-03-12 Thread Toby Thain
On 12-Mar-07, at 11:28 AM, Malachi de AElfweald wrote: ZFS supports swap to /dev/vzol, however, I do not have data related to performance. Also note that ZFS does not support dump yet, see RFE 5008936. I am getting ready to install a new server from scratch. While I had been hoping to do a

Re: [zfs-discuss] X2200-M2

2007-03-12 Thread Toby Thain
On 12-Mar-07, at 2:37 PM, Bart Smaalders wrote: Jason J. W. Williams wrote: Hi Brian, To my understanding the X2100 M2 and X2200 M2 are basically the same board OEM'd from Quanta...except the 2200 M2 has two sockets. As to ZFS and their weirdness, it would seem to me that fixing it would be mo

Re: [zfs-discuss] File level snapshots in ZFS?

2007-03-30 Thread Toby Thain
On 29-Mar-07, at 5:43 PM, Richard Elling wrote: Atul Vidwansa wrote: Hi Richard, I am not talking about source(ASCII) files. How about versioning production data? I talked about file level snapshots because snapshotting entire filesystem does not make sense when application is changing j

Re: [zfs-discuss] Contents of transaction group?

2007-04-09 Thread Toby Thain
On 9-Apr-07, at 8:15 AM, Atul Vidwansa wrote: Hi, I have few questions about the way a transaction group is created. 1. Is it possible to group transactions related to multiple operations in same group? For example, an "rmdir foo" followed by "mkdir bar", can these end up in same transactio

Re: [zfs-discuss] ZFS and Linux

2007-04-11 Thread Toby Thain
On 11-Apr-07, at 8:25 PM, Ignatich wrote: Rich Teer writes: On Wed, 11 Apr 2007, Rayson Ho wrote: Why does everyone need to be compatible with Linux?? Why not Linux changes its license and be compatible with *BSD and Solaris?? I agree with this sentiment, but the reality is that changing th

Re: [zfs-discuss] ZFS and Linux

2007-04-12 Thread Toby Thain
On 12-Apr-07, at 12:15 AM, Rayson Ho wrote: On 4/11/07, Toby Thain <[EMAIL PROTECTED]> wrote: I hope this isn't turning into a License flame war. But why do Linux contributors not deserve the right to retain their choice of license as equally as Sun, or any other copyright holder,

Re: [zfs-discuss] ZFS and Linux

2007-04-12 Thread Toby Thain
On 12-Apr-07, at 1:01 AM, Rich Teer wrote: On Wed, 11 Apr 2007, Toby Thain wrote: I hope this isn't turning into a License flame war. But why do Linux contributors not deserve the right to retain their choice of license as equally as Sun, or any other copyright holder, does? Read w

Re: [zfs-discuss] ZFS and Linux

2007-04-12 Thread Toby Thain
On 12-Apr-07, at 8:34 AM, Joerg Schilling wrote: Ignatich <[EMAIL PROTECTED]> wrote: Joerg Schilling writes: There is a lot of missunderstandings with the GPL. Porting ZFS to Linux wouldnotmake ZFS a "derived work" from Linux. I do not see why anyone could claim that there is a need to p

Re: [zfs-discuss] ZFS and Linux

2007-04-12 Thread Toby Thain
On 12-Apr-07, at 1:02 AM, Shawn Walker wrote: ... Which is funny considering how many GPL projects *love* the fact that BSD-licensed code is easily integrable with their project, yet don't want to give others the same benefit. That's a pointless remark. Why? BSD licensors choose that licens

Re: [zfs-discuss] quickly move files in different zfs in same zpool

2007-04-12 Thread Toby Thain
On 12-Apr-07, at 3:40 PM, Sean Liu wrote: In good'ol days if you are moving file/files in the same UFS, it's a snap as the moving is only a change in dir/inode level. Since zfs encourages creating more filesystems instead of dirs, moving can be an issue - data must be moved around instead

Re: [zfs-discuss] quickly move files in different zfs in same zpool

2007-04-12 Thread Toby Thain
On 12-Apr-07, at 7:42 PM, Frank Cusack wrote: On April 12, 2007 7:10:34 PM -0300 Toby Thain <[EMAIL PROTECTED]> wrote: On 12-Apr-07, at 3:40 PM, Sean Liu wrote: In good'ol days if you are moving file/files in the same UFS, it's a snap as the moving is only a change in

Re: [zfs-discuss] ZFS and Linux

2007-04-12 Thread Toby Thain
On 12-Apr-07, at 7:21 PM, Rich Teer wrote: On Thu, 12 Apr 2007, Toby Thain wrote: Individually, Linux contributors have every right to retain their choice of license for software they produce. But given the viral nature of the GPL, Is it worth reading the rest of your post, if it

Re: [zfs-discuss] ZFS and Linux

2007-04-12 Thread Toby Thain
On 12-Apr-07, at 8:49 PM, Nicolas Williams wrote: On Thu, Apr 12, 2007 at 03:51:06PM -0700, Frank Cusack wrote: On April 12, 2007 5:33:00 PM -0500 Nicolas Williams <[EMAIL PROTECTED]> wrote: The same applies to Linux, except that many people believe that the GPL would make such a port a deri

Re: [zfs-discuss] ZFS and Linux

2007-04-12 Thread Toby Thain
On 12-Apr-07, at 8:31 PM, Shawn Walker wrote: On 12/04/07, Toby Thain <[EMAIL PROTECTED]> wrote: On 12-Apr-07, at 1:02 AM, Shawn Walker wrote: > ... > > Which is funny considering how many GPL projects *love* the fact that > BSD-licensed code is easily integrable with

Re: [zfs-discuss] ZFS and Linux

2007-04-13 Thread Toby Thain
On 12-Apr-07, at 11:51 PM, Rich Teer wrote: On Thu, 12 Apr 2007, Toby Thain wrote: Those who promulgate the tag for whatever motive - often agencies of Microsoft - have all foundered on the simple fact that the GPL applies ONLY to MY code as licensor (*and modifications thereto*); it has

Re: [zfs-discuss] ZFS and Linux

2007-04-13 Thread Toby Thain
On 13-Apr-07, at 9:51 AM, Al Hopper wrote: On Fri, 13 Apr 2007, Toby Thain wrote: On 12-Apr-07, at 11:51 PM, Rich Teer wrote: On Thu, 12 Apr 2007, Toby Thain wrote: Those who promulgate the tag for whatever motive - often agencies of Microsoft - have all foundered on the simple fact

Re: [zfs-discuss] ZFS and Linux

2007-04-13 Thread Toby Thain
On 13-Apr-07, at 4:22 AM, Dick Davies wrote: On 13/04/07, Toby Thain <[EMAIL PROTECTED]> wrote: Those who promulgate the tag for whatever motive - often agencies of Microsoft - have all foundered on the simple fact that the GPL applies ONLY to MY code as licensor (*and modifications t

Re: [zfs-discuss] ZFS and Linux

2007-04-13 Thread Toby Thain
On 13-Apr-07, at 11:39 AM, Rich Teer wrote: On Fri, 13 Apr 2007, Toby Thain wrote: IMHO, this is a faulty conclusion. And I disagree. So we'll have to agree to disagree. The interesting use case of "contributing", and I think the one that spurred the creation of the GPL,

Re: [zfs-discuss] ZFS and Linux

2007-04-13 Thread Toby Thain
On 13-Apr-07, at 11:43 AM, Toby Thain wrote: On 13-Apr-07, at 4:22 AM, Dick Davies wrote: On 13/04/07, Toby Thain <[EMAIL PROTECTED]> wrote: Those who promulgate the tag for whatever motive - often agencies of Microsoft - have all foundered on the simple fact that the GPL applies O

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