Re: NBD swap

Hi Giacomo,

I'm not aware of any issues with swap on LTSP, especially with local 
swap, and I can't see why it would be different or more unstable than 
local swap in non-LTSP installations.

I guess you could hire a professional to troubleshoot this instability 
for you...

Best regards,
Alkis

Στις 29/1/19 4:03 μ.μ., ο Giacomo Trovato έγραψε:
> Hi Alkis,
> 
> any comment on this?
> 
> Thank you!
> 
> ---
> 
> Giacomo Trovato
> 
> Il 22/01/2019 15:41 Giacomo Trovato ha scritto:
> 
>> Hi All,
>>
>> any hints?
>> I'm more and more convinced that there are problems on the SWAP 
>> mechanism (NBD and local) of LTSP.
>>
>> ---
>> Giacomo Trovato
>>
>> Il 21/01/2019 23:25 Giacomo Trovato ha scritto:
>>
>>     ...I've also checked the fstab file on my fat clients and there is
>>     no partitions mounted!
>>
>>     Then I've tried to create a local swap partition on the disk and
>>     enabled the local swap on lts.conf, but I see zero swap space with
>>     top command.
>>
>>     ---
>>
>>     Giacomo Trovato
>>
>>     Il 21/01/2019 19:02 Giacomo Trovato ha scritto:
>>
>>         Hi Alkis,
>>
>>         I still think to have issues with NBD swap.
>>
>>         I noticed that my browsers hang only on fat clients with 2 GB
>>         ram that use swap.
>>
>>         I've some fat clients that do not use swap and they do not crash.
>>
>>         I confirm that I've no folders of the clients in my tmp/nbd-swap.
>>
>>         I use only one NIC on my server (proxy DHCP mode).
>>
>>         Thank you!
>>
>>         ---
>>
>>         Giacomo Trovato
>>
>>         Il 17/01/2019 23:14 Vagrant Cascadian ha scritto:
>>
>>             On 2019-01-17, Giacomo Trovato wrote:
>>
>>                 I've set this on my lts.conf:
>>
>>                 _USE_LOCAL_SWAP=False_
>>                 _NBD_SWAP=True_
>>
>>                 So, I assume (as per lts.conf manual) that my fat
>>                 clients have swap if
>>                 they have less of 800 MB of RAM (but on the manual
>>                  NBD_SWAP_THRESHOLD
>>                 is referred to thin client only!).
>>
>>                 But with top command I see swap o my fat clients that
>>                 have 2GB of RAM!
>>
>>
>>             By setting NBD_SWAP=True, you're configuring it to use NBD
>>             swap in all
>>             cases regardless of RAM capacity.
>>
>>
>>                 Then I've this on my syslog on the server:
>>
>>                 _Jan 17 08:29:26 ltspmartini nbd_server[8988]: connect
>>                 from
>>                 172.20.18.131, assigned file is
>>                 /tmp/nbd-swap/172.20.18.131_
>>                 _Jan 17 08:29:26 ltspmartini nbd_server[8988]: Can't
>>                 open authorization
>>                 file /etc/ltsp/nbd-server.allow (No such file or
>>                 directory)._
>>
>>                 In fact I don't have nbd-server.allow on my server and
>>                 there are no
>>                 folders inside tmp/nbd-swap.
>>
>>
>>             That is fine. nbd_server checks for the presence of the
>>             nbd-server.allow
>>             file by default, but should behave sanely if it's missing.
>>
>>
>>                 I assume that NBD swap doesn't work and perhaps this
>>                 is the reason why
>>                 Chromium and Firefox sometimes explode on my fat clients.
>>
>>
>>             From a fat client, use open a terminal and run "free -m".
>>             If it shows
>>             any swap at all, swap is working.
>>
>>
>>             live well,
>>               vagrant
>>
>>             _____________________________________________________________________
>>             Ltsp-discuss mailing list.   To un-subscribe, or change
>>             prefs, goto:
>>             https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
>>             For additional LTSP help,   try #ltsp channel on
>>             irc.freenode.net
>>
>>
>>         _____________________________________________________________________
>>         Ltsp-discuss mailing list.   To un-subscribe, or change prefs,
>>         goto:
>>         https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
>>         For additional LTSP help,   try #ltsp channel on irc.freenode.net
>>
> 
> 
> _____________________________________________________________________
> Ltsp-discuss mailing list.   To un-subscribe, or change prefs, goto:
>        https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
> For additional LTSP help,   try #ltsp channel on irc.freenode.net
> 



_____________________________________________________________________
Ltsp-discuss mailing list.   To un-subscribe, or change prefs, goto:
      https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
For additional LTSP help,   try #ltsp channel on irc.freenode.net