[zfs-discuss] zfs send -i A B with B older than A

2007-06-18 Thread Marc Bevand
It occured to me that there are scenarios where it would be useful to be able to zfs send -i A B where B is a snapshot older than A. I am trying to design an encrypted disk-based off-site backup solution on top of ZFS, where budget is the primary constraint, and I wish zfs send/recv would allow me

Re: [zfs-discuss] ZFS zpool created with MPxIO devices question

2007-06-18 Thread Robert Milkowski
Hello James, Friday, June 15, 2007, 3:40:29 PM, you wrote: JL Customer asks: JL Will SunCluster 3.2 support ZFS zpool created with MPxIO devices instead JL of the corresponding DID devices? Works perfectly. btw: you don't have to use DID devices with ZFS. JL Will it cause any support issues?

[zfs-discuss] Re: ZFS Panics

2007-06-18 Thread Gino
Upgrade to SNV60 or better .. gino This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss

[zfs-discuss] Re: zfs compression - scale to multiple cpu ?

2007-06-18 Thread Jürgen Keil
i think i have read somewhere that zfs gzip compression doesn`t scale well since the in-kernel compression isn`t done multi-threaded. is this true - and if so - will this be fixed ? If you're writing lots of data, zfs gzip compression might not be a good idea for a desktop machine, because

Re: [zfs-discuss] Re: Re: Re: ZFS Apple WWDC Keynote Absence

2007-06-18 Thread Mario Goebbels
2. ZFS doesn't make much sense for high-performance laptops. Laptop drives are slow enough without artificially increasing the number of seeks on writes. Apple makes a LOT of money from laptops. It's also unclear how well ZFS would play with other latency- and CPU-sensitive applications

Re: [zfs-discuss] Re: Mac OS X 10.5 read-only support for ZFS

2007-06-18 Thread Mario Goebbels
Here's one possible reason that a read-only ZFS would be useful: DVD-ROM distribution. built-in compression works for DVDs, too. Sector errors on DVD are not uncommon. Writing a DVD in ZFS format with duplicated data blocks would help protect against that problem, at the cost of

Re: [zfs-discuss] Re: Mac OS X 10.5 read-only support for ZFS

2007-06-18 Thread Tomas Ögren
On 18 June, 2007 - Mario Goebbels sent me these 3,2K bytes: Also, where does this single disk RAID notion come from? This sounds actually interesting. Is this a project actually in progress or to be considered? Sure, it doesn't prevent data loss on disk failure, however may improve the safety

[zfs-discuss] Re: Re: Karma Re: Re: Best use of 4 drives?

2007-06-18 Thread Tom Kimes
I am currently using 6 drives and a 550W power supply, so I'm not pushing the hardware at this point. I do understand your point. However, if you are willing to mod the case, there is room for a second power supply above where the primary p/s mounts. The case modification should be fairly

Re: [zfs-discuss] Re: zpool mirror faulted

2007-06-18 Thread Victor Latushkin
Michael Hase wrote: Hi Victor, the kernel panic in bug 6424466 resulted from overwriting some areas of the disks, in this case I would expect at least strange things - ok, not exactly a panic. In my case there was no messsing around with the underlying disks. The fix only seems to avoid the

[zfs-discuss] Re: Re: LZO compression?

2007-06-18 Thread roland
Those are interesting results. yes, indeed Does this mean you've already written lzo support into ZFS? no, i`m not a real coder, but there exists an lzo patch for zfs-fuse which has also been discussed here, afaik. not sure if this has already been included in zfs-fuse tree - just wanted to

Re: [zfs-discuss] Re: 6 disk raidz2 or 3 stripe 2 way mirror

2007-06-18 Thread Darren Dunham
The configuration of any vdev that you create does not constrain you with any vdevs you want to add to the pool in the future. You can start with any of your three choices above and then add any of the other three to the same pool. 'zpool add' will complain if the number of disks

Re: [zfs-discuss] Re: 6 disk raidz2 or 3 stripe 2 way mirror

2007-06-18 Thread Brian Hechinger
On Mon, Jun 18, 2007 at 08:57:29AM -0700, Darren Dunham wrote: I think it's mainly to keep you from doing something silly without meaning to. That's certainly a good reason. :) If you have the same type and columns, then you have the same availability expectations. If instead you take a 5

Re: [zfs-discuss] Re: Mac OS X 10.5 read-only support for ZFS

2007-06-18 Thread Adam Leventhal
On Sun, Jun 17, 2007 at 09:38:51PM -0700, Anton B. Rang wrote: Sector errors on DVD are not uncommon. Writing a DVD in ZFS format with duplicated data blocks would help protect against that problem, at the cost of 50% or so disk space. That sounds like a lot, but with BluRay etc. coming along,

[zfs-discuss] ZFS forks (Was: LZO compression?)

2007-06-18 Thread Mario Goebbels
This LZO issue is something that might crop up again and again in different shapes. If ZFS is being adopted on different operating systems, people might start cooking their own soups. What are the plans to keep this under control? What if Unix Variant/Clone X suddenly decides their ZFS code needs

Re: [zfs-discuss] ZFS forks (Was: LZO compression?)

2007-06-18 Thread Will Murnane
On 6/18/07, Mario Goebbels [EMAIL PROTECTED] wrote: Now lets consider a worse case, what if Unix Variant Y thinks it figured out some nice performance tweaks, but requires changes to the on-disk layout? Perhaps a variant on Knuth's TeX license could be used? You can do what you like with it,

Re: [zfs-discuss] ZFS forks (Was: LZO compression?)

2007-06-18 Thread Matthew Ahrens
Mario Goebbels wrote: This LZO issue is something that might crop up again and again in different shapes. If ZFS is being adopted on different operating systems, people might start cooking their own soups. I don't know about any legal restrictions that might or might not be in place to

[zfs-discuss] ZFS: How to increase the size of one of the mount points

2007-06-18 Thread Kenneth . Boyd
I have a cu that would like to increase a mount point with his zpoolCu explains below. I need to increase the size of one of the mount points, i.e. /d01. I need the procedure to do this while on line. attached is the information I have on my server as you will see I have the command

Re: [zfs-discuss] Re: 6 disk raidz2 or 3 stripe 2 way mirror

2007-06-18 Thread Darren Dunham
If you have the same type and columns, then you have the same availability expectations. If instead you take a 5 disk raidz and add a 2 disk stripe, you're dramatically changing the availability expectations. So the force is required. Certainly, but adding a mirror doesn't degrade the

Re: Karma Re: [zfs-discuss] Re: Best use of 4 drives?

2007-06-18 Thread Will Murnane
On 6/15/07, Will Murnane [EMAIL PROTECTED] wrote: Interesting in this regard is the yy-0221: http://www.directron.com/yy0221bk.html with 10 3.5 bays (well-cooled, too - fans mounted in front of 8 of them) and 6 5.25 bays. This doesn't leave much room for a power supply, unfortunately - the

Re: Karma Re: [zfs-discuss] Re: Best use of 4 drives?

2007-06-18 Thread Frank Cusack
On June 16, 2007 7:37:31 PM -0400 Will Murnane [EMAIL PROTECTED] wrote: I wish someone would make a card with a pci-express to pci-x bridge chip and two of those controllers on it. Hmm, I just realized I'm describing the highpoint 2340: http://www.highpoint-tech.com/USA/rr2340.htm eh, sorry

[zfs-discuss] Re: 6 disk raidz2 or 3 stripe 2 way mirror

2007-06-18 Thread Joe S
Thanks for all the comments. Very helpful. I have another question. The six disk raidz2 pool works, but I noticed in Richard Elling's blog that a raidz/raidz2 pool has the read performance of a single drive (unless I misread something). What if I create 2x three disk raidz vdevs and put them in

Re: [zfs-discuss] Re: 6 disk raidz2 or 3 stripe 2 way mirror

2007-06-18 Thread Ian Collins
Joe S wrote: Thanks for all the comments. Very helpful. I have another question. The six disk raidz2 pool works, but I noticed in Richard Elling's blog that a raidz/raidz2 pool has the read performance of a single drive (unless I misread something). What if I create 2x three disk raidz vdevs

Re: [zfs-discuss] Re: 6 disk raidz2 or 3 stripe 2 way mirror

2007-06-18 Thread Will Murnane
On 6/19/07, Joe S [EMAIL PROTECTED] wrote: Thanks for all the comments. Very helpful. I have another question. The six disk raidz2 pool works, but I noticed in Richard Elling's blog that a raidz/raidz2 pool has the read performance of a single drive (unless I misread something). What if I

Re: [zfs-discuss] zfs send -i A B with B older than A

2007-06-18 Thread Matthew Ahrens
Marc Bevand wrote: o In order to restore the latest snapshot T-0, all the zfs streams, T-2, T-1 and T-0, have to be decrypted, then zfs receive'd. It is slow and inconvenient. True, but presumably restoring the snapshots is a rare event. o My example only backs up the last 3