IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 16 May 2010 (all times are UTC)
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| 01:58 | <alkisg> Wow, btrfs looks sweet for ltsp chroots... online volume growth and shrinking, transparent compression, copy on write, snapshots, subvolumes... if all this is true, we might be able to stop using squashfs, nbd, ltsp-update-image, bind mounts, aufs, tmpfs, different images/nbd ports (we'd use subvolumes) etc...
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| 02:02 | <dba> btrfs doesn't compress nearly as good as squashfs, yet.
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| 02:05 | <alkisg> squashfs compression in ubuntu lucid was completely disabled in ltsp because it caused problems... so I'm sure it can outperform 0% compression :D
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| 02:06 | But the main point it that it'll be a live file system, like nfs, not a "snapshot" like the nbd/squashfs combination
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| 02:06 | ...and crfs on top of it to share it over the network: http://lwn.net/Articles/267896/
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| 02:07 | "The basic idea behind CRFS is to have clients cache as much of the filesystem data as they can while using cache coherency protocols to reduce the amount of network traffic that gets generated. " ==> that's just perfect for local networks
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| 02:11 | "Something on the order of a 3x speedup over asynchronous NFS mounts is the current performance of CRFS for a simple untar. Comparing to synchronous NFS mounts (where each write has to actually hit the remote disk) is not a sensible comparison; there is a roughly 10x speed difference between the two types of NFS mounts."
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| 02:23 | <dba> i'm not argueing against btrfs, i'm quite fond of it anyway
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| 02:24 | i'm just saying until it's a full replacement for the current aufs+squashfs stack,
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| 02:25 | will need some more time (in order of magnitude of many months).
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| 02:30 | <alkisg> Sure - I was thinking for the next lts ubuntu release in 2 years...
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| 06:00 | <langvann_> ok
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| 06:00 | so spotify works over ltsp
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| 06:00 | but how do I gain root?
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| 11:01 | <alkisg> !button_layout
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| 11:01 | <ltspbot> alkisg: "button_layout" :: To revert the Ubuntu button position and ordering to their old values, run: sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.mandatory --type string --set /apps/metacity/general/button_layout :minimize,maximize,close
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| 11:01 | <alkisg> !forget button_layout
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| 11:01 | <ltspbot> alkisg: The operation succeeded.
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| 11:02 | <alkisg> !learn button_layout as To revert the Ubuntu button position and ordering to their old values, run: sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.mandatory --type string --set /apps/metacity/general/button_layout menu:minimize,maximize,close
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| 11:02 | <ltspbot> alkisg: The operation succeeded.
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| 11:02 | <alkisg> !button_layout
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| 11:02 | <ltspbot> alkisg: "button_layout" :: To revert the Ubuntu button position and ordering to their old values, run: sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.mandatory --type string --set /apps/metacity/general/button_layout menu:minimize,maximize,close
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| 12:21 | <rhodan> can I use existing user homes on an active directory server for user homes on linux machines?
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| 13:03 | <johnny> hmm.. i need a cd that can boot usb live images
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| 13:04 | <stgraber> alkisg: we are syncing from unstable for maverick, syncing from testing is only for lts
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| 13:04 | <johnny> or anything ese really
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| 13:08 | <alkisg> stgraber: nice! Any idea when udhcp will be syncing from debian?
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| 13:08 | johnny: you want to boot a client from usb but its bios doesn't support it?
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| 13:10 | <johnny> yes
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| 13:10 | i've been carrying around a slightly chunky cd folder with various install cds and some 2 blank cdrs, 2 blank dvds, and a cdrw
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| 13:11 | i'd like to replace it with 3 cds
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| 13:11 | 1 cd that can boot anything from a usb key
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| 13:11 | 1 blank cdr, and 1 blank dvd
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| 13:12 | i wonder how long cdrw's last in all reality.. i think i should use that
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| 13:12 | <alkisg> If the bios doesn't "see" the usb port, then you need to boot a kernel to see the port
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| 13:12 | <johnny> hmm..
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| 13:12 | <alkisg> I.e. grub/syslinux can't boot from usb if the bios doesn't support it
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| 13:12 | <johnny> what computers are those?
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| 13:12 | oh.. see the port ? or see the port as bootable?
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| 13:13 | <alkisg> See the port
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| 13:13 | (as a storage device)
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| 13:13 | <johnny> hmm.. how old are we talkin about?
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| 13:13 | <alkisg> 2004 I think
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| 13:14 | Try it, put an ubuntu cd in it and write "chain32 hd0 1"
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| 13:14 | ...or the grub2 rescue cd..
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| 13:15 | <johnny> i don't have such a pc available
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| 13:16 | i do have a pc that boots only in usb floppy mode
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| 13:16 | which is lame
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| 13:16 | but the mobo got shot
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| 13:16 | i think the powersupply took it out
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| 13:16 | <alkisg> Yeah grub2 or syslinux will be able to boot that properly (in hard disk mode)
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| 13:16 | *would
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| 13:17 | <johnny> hmm.. it says that grub2 can boot usb from pcs that can't normally boot usb
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| 13:18 | "GRUB2 can boot a USB in a computer that can't normally boot a USB drive"
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| 13:18 | <alkisg> Well there are 3 cases
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| 13:18 | <Mava> hmm.. ?
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| 13:18 | johnny: where does that read? wanna take a look at it also
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| 13:18 | <alkisg> 1) The bios doesn't see it, grub doesn't see it, you need to load a kernel first to see the usb stick
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| 13:19 | 2) The bios sees it but doesn't boot from it. Yeah in that case grub can boot from it
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| 13:19 | 3) The bios supports booting from usb, so grub isn't needed
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| 13:19 | <johnny> so.. what's the age range between those 2?
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| 13:19 | <alkisg> I think about 2003-2005
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| 13:19 | or something like that
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| 13:20 | My daugter's laptop is like that, when its hard disk broke I had to write a kernel to a cd to boot it from an external disk
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| 13:20 | <johnny> http://members.iinet.net/~herman546/p20.html
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| 13:21 | hmm.. that sucks..
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| 13:21 | i'm really not sure i are perhaps tho
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| 13:21 | maybe i should just not carry around disks at all except the blanks then
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| 13:22 | <alkisg> A multiboot cd (grub2, syslinux, gpxe, live cd) is nice to have around
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| 13:26 | <Mava> pxe boot ?
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| 13:27 | <johnny> sure..
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| 13:27 | grub can pxe boot
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| 13:28 | alkisg, not sure how useful it will be .. might as well just hope that sysreccd or similiar gets grub2 then
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| 13:28 | sysreccd is a bit too disk focused tho. looking for something a little larger
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| 13:35 | <alkisg> johnny: grub2 doesn't have any advantage over syslinux for booting from usb...
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| 13:36 | <johnny> except that it can boot more things
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| 13:37 | <alkisg> Yup... I thought you were talking about usb, that's why I was referring to it - (09:03:20 μμ) johnny: hmm.. i need a cd that can boot usb live images
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| 13:38 | <johnny> sure, it just seems convenient to use grub
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| 13:38 | since you can more easily set the targets
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| 13:45 | <alkisg> Yeah I'm a grub2 fan too - I especially like grub-mkimage, it allows for creating triple boot images (floppy/usb/cd) and it also enables the user to add custom files to those images (e.g. gpxe)...
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| 13:46 | <johnny> has anybody done a "distro" of such a thing?
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| 13:53 | <johnny> i'd love to pack a usb key with a bunch of isos
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| 13:53 | and have it automatically update them
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