UbuntuHelp:UbuntuLTSP/EnableNBDSWAP

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https://help.ubuntu.com/community/UbuntuLTSP/EnableNBDSWAP

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This wiki page is specific to Ubuntu Version(s): 8.04

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To enable NBD Swap (Network swap for thin-clients) we must ensure the proper facilities are active and configured correctly.

• Edit /var/lib/tftpboot/ltsp/i386/lts.conf :

NBD_SWAP = True

The next lts.conf options, if used, will give you more control over where NBD Swap takes place:

SWAP_SERVER = IP_ADDRESS_OF_NBDSWAPD_SERVER # default is IP of LTSP server
NBD_PORT    = PORT                          # default is 9572 (after following instructions in https://help.ubuntu.com/community/UbuntuLTSP/UpdatingChroot )

• Create a /etc/ltsp/nbdswapd.conf file with the size of desired swapfile for each client. Keep in mind swapfiles live in /tmp, so make sure you have enough space in /tmp to facilitate CLIENTS x SIZE:

SIZE=256

• Make sure /etc/hosts.allow has the following line in it (it isn't in Hardy - only nbdrootd is as of 2008/10/10, so add nbdswapd line below. See https://bugs.launchpad.net/bugs/281501 ):

nbdswapd: ALL: keepalive

Reboot your thin-clients to activate their NBD Swap. You can verify swapfiles are being created in /tmp with the following to give you the number 256M files in /tmp starting with tmp. (which should be roughly accurate):

ls -lh /tmp/tmp.*|grep 256M|wc -l

This should be all you need to get swapfiles going in Ubuntu LTSP.