IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 28 January 2015   (all times are UTC)

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00:55
<map7>
muppis, Found the issue was the fact I use zsh and zsh doesn't exist in my chroot. Adding it now.
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06:02
<alkisg>
map7: file an upstream bug about that
06:02
!ltsp-bug
06:02
<ltsp`>
ltsp-bug: To file a bug report for upstream LTSP, go to https://bugs.launchpad.net/ltsp
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21:50
<championofcyrodi>
damn gnome keyring still dumping millions of temp keyrings in my user's .local keyring folder for chrome :(
21:52
https://bugzilla.gnome.org/show_bug.cgi?id=730587
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22:13
<map7>
work_alkisg, The bug has already been submitted. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=747178
22:14
<vagrantc>
oh, that bug.
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23:06
<championofcyrodi>
it's official. ramdisk hosted nbd image is much faster for reading from multiple clients
23:07
<vagrantc>
reading?
23:07
<championofcyrodi>
well it's read only for the root image
23:07
let me rephrase...
23:07* vagrantc is curious
23:07
<championofcyrodi>
on the server... copied the amd64.img to a ramdisk.
23:08
modded /etc/nbd-server/conf.d to point to the ramdisk
23:08
<vagrantc>
raw device?
23:08
<championofcyrodi>
tmpfs
23:08
<vagrantc>
just put /opt/ltsp/images on tmpfs :)
23:09
<championofcyrodi>
but then the image will be gone on reboot
23:09
and will have to be rebuilt
23:09
<vagrantc>
make a backup and restore from it on reboot
23:09
<championofcyrodi>
in /etc/fstab, i added an entry to create a 2GB fstab @ /mnt/ramdisk
23:10
then w/ nbd-server 'start', cp from images to ramdisk
23:10
similar
23:10
<vagrantc>
right
23:10
might be worth integrating something like that upstream...
23:10
<championofcyrodi>
getting ~ 96-100MB/sec for reads from /dev/nbd0 on the clients
23:10
on 1.0Gbps
23:11
which is the bottleneck (network)
23:11
the ram speed is around 6 GB/sec
23:11* vagrantc also experimented with loading the nbd device into tmpfs on the client-side
23:11
<championofcyrodi>
i'm thinking about doing some link aggregation on my NFS server to get ~3.0Gbps with 3 NICs...
23:11
then switch from SSHFS to NFS
23:12
<vagrantc>
how many clients you working with?
23:12
<championofcyrodi>
currently we have 19 workstations
23:12
we bought 20, but i keep 1 for testing
23:12
<vagrantc>
thin or fat clients?
23:12
<championofcyrodi>
fat
23:13
we have a lot of development on apps like this : http://aperturetiles.com/twitter-heatmap/
23:13
so we need very fast X rendering
23:14
<vagrantc>
and then NBD speed would also matter a fair amount
23:16
<championofcyrodi>
hdparm showed about 100MB/sec.. vs. my desktop which shows 120MB/sec
23:16
desktop is SATA II
23:16
i believe that if we were on 10Gbps, NBD would crush SATA
23:16
if the image was in ramdisk on server side
23:17
RAM -> 10Gbps Ether -> RAM
23:17
for the app development, we forward the IDE and development tools from baremetal servers.
23:17
to the fat client's X
23:18
so the huge maven jobs that parse 4GB of JAR files runs acceptable.
23:19
the fat client is literally just for jumping off into a development server. Or running chrome, thunderbird, pidgin, pithos/spotify.
23:19
most of the data is hosted on distributed 'cloud' servers. aka apache hadoop
23:20
the developers are learning more about networking then they ever wanted to. :)
23:21
gotta run. night!
23:23
<vagrantc>
championofcyrodi: thanks for sharing some info about your install!
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