Re: [9fans] (no subject)
> > if a coraid appliance were pcie-attached rather than ethernet attached, > > would you still ask this question? do you think the block diagram of coraid > > hardware looks fundamentally different than the block diagram of a raid > > card? > > It's just curiosity. I know the appliance is Plan 9 based. If it > uses an off-the-shelf RAID chip I might buy a card with that chip > since it works in Plan 9. If it's fs(3) I know fs(3) is good enough > for my needs. If it's something else at least I know fs(3) is not > good enough and I might be tempted to write something myself. So yes, > I'd ask even if it was a PCIe card instead of network appliance. the motivation behind my question is that it's not clear to me that there is such a thing as pure hardware raid. if someone knows of something that implements the entire read/write path without a cpu, even with a degraded or rebuilding raid, i'd be very interested in that. but as far as i know, there's always a processor in there on the other side of the bus. in case of aoe, the bus is ethernet and for a "hardware raid" card, it's usually some form of pci. (see wiki's raid article.) - erik
Re: [9fans] (no subject)
On 2011-12-30, at 14:41 PM, Charles Forsyth wrote: > That's upgrading the stored formats, Yes. signature.asc Description: Message signed with OpenPGP using GPGMail
Re: [9fans] (no subject)
That's upgrading the stored formats, not the in-kernel(?) software support for a particular version? On 30 December 2011 21:56, Aram Hăvărneanu wrote: > > zpool/zfs upgrade? Yes. Don't recall if I had to reboot > > afterwards. > > You don't. > > -- > Aram Hăvărneanu > >
Re: [9fans] (no subject)
> zpool/zfs upgrade? Yes. Don't recall if I had to reboot > afterwards. You don't. -- Aram Hăvărneanu
Re: [9fans] (no subject)
On Fri, 30 Dec 2011 21:34:39 GMT Charles Forsyth wrote: > > Could you do the latter without taking the machine down? > > On 30 December 2011 21:28, Bakul Shah wrote: > > > Since then I have replaced disks with much bigger disks without taking the > > machine down, upgraded the os & zpool/zfs versions a couple of times zpool/zfs upgrade? Yes. Don't recall if I had to reboot afterwards. "Resilvering" to replace a disk takes a long time so not having to take the machine for hours is nice. A quick reboot is no big deal.
Re: [9fans] (no subject)
On 12/30/2011 3:05 PM, erik quanstrom wrote: Does the Coraid applience implement RAID in hardware or does it use fs(3) or another software solution? if a coraid appliance were pcie-attached rather than ethernet attached, would you still ask this question? do you think the block diagram of coraid hardware looks fundamentally different than the block diagram of a raid card? - erik I think he is trying to get you to divulge details on the software running on the coraid appliance itself. We all know it is plan 9 based (right?), so it would be interesting to know how this extra functionality of raid was added. I know these are trade secrets though so I've never asked. I would still ask that question if it were pcie attached. Curiosity will be my undoing though. -Jack
Re: [9fans] (no subject)
Charles Forsyth wrote: >> Since then I have replaced disks with much bigger disks without taking the >> machine down, upgraded the os & zpool/zfs versions a couple of times > > Could you do the latter without taking the machine down? Upgrade zpool/zfs version yes, os, no. -- Aram Hăvărneanu
Re: [9fans] (no subject)
Could you do the latter without taking the machine down? On 30 December 2011 21:28, Bakul Shah wrote: > Since then I have replaced disks with much bigger disks without taking the > machine down, upgraded the os & zpool/zfs versions a couple of times
Re: [9fans] (no subject)
> I don't have much use for AoE at home. At one point I used it to > network boot machines, but I only have laptops now, which have local > disks because I need to use them disconnected from the network > sometimes. > > I need a higher level protocol like 9p or venti, and I'd rather have a > single Plan 9 machine with direct attached disks serving everything > than a Plan 9 front end serving 9p and another machine providing AoE > to it. I have way, way to many machines. Yesterday I've thrown away > 5. I need less machines, not more :-). sure, but you haven't answered the question of how to do redundancy and recovery. aoe is a good way to isolate these functions into an appliance. > Does the Coraid applience implement RAID in hardware or does it use > fs(3) or another software solution? if a coraid appliance were pcie-attached rather than ethernet attached, would you still ask this question? do you think the block diagram of coraid hardware looks fundamentally different than the block diagram of a raid card? - erik
Re: [9fans] (no subject)
My fileserver is running freebsd zfs. Basically one machine for nfs, venti, cifs, timemachine + sundry other services. This has worked well since 2005. Initially I used h/w raid under zfs. This was a mistake, forcibly corrected when my machine died. Now I use raidz. Since then I have replaced disks with much bigger disks without taking the machine down, upgraded the os & zpool/zfs versions a couple of times (could've done without them but I prefer to run the latest stable release). Except for these events it has required hardly any maintenance (just checking vital signs like fan speed, any disk errors in weekly zpool scrub etc). One issue is FreeBSD install still doesn't install on zfs. But you can run a minimal root off a USB disk and manually setup zfs (which is pretty easy). I should probably run an AOE server on it as well! When I next replace this machine I will see if I can create a USB disk image. On Dec 30, 2011, at 12:35 PM, Aram Hăvărneanu wrote: >> aoe doesn't require solaris, or any other operating system. >> you can use it directly with a plan 9 file server, as i do. > > Of course AoE doesn't require much, my comment was in the context of > Coraid's hardware appliance. > > I don't have much use for AoE at home. At one point I used it to > network boot machines, but I only have laptops now, which have local > disks because I need to use them disconnected from the network > sometimes. > > I need a higher level protocol like 9p or venti, and I'd rather have a > single Plan 9 machine with direct attached disks serving everything > than a Plan 9 front end serving 9p and another machine providing AoE > to it. I have way, way to many machines. Yesterday I've thrown away > 5. I need less machines, not more :-). > > Does the Coraid applience implement RAID in hardware or does it use > fs(3) or another software solution? > > -- > Aram Hăvărneanu >
Re: [9fans] (no subject)
> aoe doesn't require solaris, or any other operating system. > you can use it directly with a plan 9 file server, as i do. Of course AoE doesn't require much, my comment was in the context of Coraid's hardware appliance. I don't have much use for AoE at home. At one point I used it to network boot machines, but I only have laptops now, which have local disks because I need to use them disconnected from the network sometimes. I need a higher level protocol like 9p or venti, and I'd rather have a single Plan 9 machine with direct attached disks serving everything than a Plan 9 front end serving 9p and another machine providing AoE to it. I have way, way to many machines. Yesterday I've thrown away 5. I need less machines, not more :-). Does the Coraid applience implement RAID in hardware or does it use fs(3) or another software solution? -- Aram Hăvărneanu
Re: [9fans] (no subject)
> I don't think he was implying that one needed the other. In any case I > figured I would ask -- are there any plans for a small scale AoE > appliance from coraid? Didn't there used to be a single drive AoE kit > long ago? there was once a single drive pata unit. > What is the list's personal/home usage of AoE like? Do you guys use > generic hardware and something like vblade (or those other ones people > have made for linux like ggblade or whatever it is called)? http://www.quanstro.net/plan9/fs.html i also use vblade(8) on plan 9 for testing. - erik
Re: [9fans] (no subject)
On 12/30/2011 12:08 PM, erik quanstrom wrote: It might be a bit much for home use, but if I had a little bit of a budget I'd use Coraid's AoE stuff as the basis for my storage. Yeah, it's pretty overkill. I've previously worked at a storage company as a file system guy and now I have at home a nice array with ZFS on top. It works great, but I want to scale down. I want less stuff, not more. And I want to use Plan9, not Solaris. aoe doesn't require solaris, or any other operating system. you can use it directly with a plan 9 file server, as i do. - erik I don't think he was implying that one needed the other. In any case I figured I would ask -- are there any plans for a small scale AoE appliance from coraid? Didn't there used to be a single drive AoE kit long ago? What is the list's personal/home usage of AoE like? Do you guys use generic hardware and something like vblade (or those other ones people have made for linux like ggblade or whatever it is called)? -Jack
[9fans] (no subject)
> > It might be a bit > > much for home use, but if I had a little bit of a budget I'd use Coraid's > > AoE > > stuff as the basis for my storage. > > Yeah, it's pretty overkill. I've previously worked at a storage > company as a file system guy and now I have at home a nice array with > ZFS on top. It works great, but I want to scale down. I want less > stuff, not more. And I want to use Plan9, not Solaris. aoe doesn't require solaris, or any other operating system. you can use it directly with a plan 9 file server, as i do. - erik
Re: [9fans] p9p vac/vacfs compatibility: uid/gid, ctime, 9P2000.L, 9pserve
> Who decided that .u is deprecated? I definitely didn't and I am using > it for all my file servers that are supposed to work on Unix. Sorry, I mean the plan9port support for 9p2000.u is deprecated. It was removed in december 2010. -- David du Colombier
Re: [9fans] p9p vac/vacfs compatibility: uid/gid, ctime, 9P2000.L, 9pserve
On Wed, Dec 28, 2011 at 4:48 PM, David du Colombier <0in...@gmail.com> wrote: > Forget about 9p2000.u, it's deprecated. Who decided that .u is deprecated? I definitely didn't and I am using it for all my file servers that are supposed to work on Unix. Thanks, Lucho
Re: [9fans] Intel X4500 Integrated Graphics support
sorry for the slow response. vacation. i'll try to look at this today. but my time is being consumed by a puppy, so my bandwidth might be poor. one thing i notice is that there are two different video devices. that's kind of wierd. - erik
Re: [9fans] "fake tty" or other trick?
/sys/src/ape/cmd/pdksh/tty.c just #ifdef's out the need for /dev/tty there once was a ptyfs in ape, but it seems to have vanished
