Re: Very slow guest login

On 2019-01-10 20:23, Alkis Georgopoulos wrote:
> As I mentioned previously, there is a very good way to do that, with
> an nbd-server copy-on-write export that will provide the /home/user/
> folder.
> This even speeds up things more, as the users access their /home over
> nbd instead of over sshfs, and it makes them more stable, as there are
> no sshfs file locking issues. And it saves RAM, as the disk "sectors"
> written are on the server instead of on a tmpfs. And there's no
> rsync/copy involved, since it's copy-on-write. The export is instant.
> 
> The bad news is that while I've successfully used this method in the
> past, I don't know of any documentation about it, and it would take a
> couple of hours to properly document it, so... you'd need to spend
> some time reading the ltsp source code and the nbd-server manpage to
> implement it. :/
> 
> 
> On 1/10/19 2:27 PM, Giacomo Trovato wrote:
>> Hi All,
>> 
>> on my school laboratory with LTSP-MATE (server on ESXI) I've 21 fat 
>> clients that login as guest.
>> 
>> I've the reset guest account script.
>> 
>> The login is very slow when all the students login at the same time 
>> (also more than 5 minutes).
>> 
>> I assume that's because the script copies at the same time all the 
>> home folders from the template.
>> 
>> Is there any way to speedup the process?
>> 
>> Perhaps executing the script at logout or with a chron job at night?
>> 
>> Thank you
> 
> 
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Perhaps this link is helpful. It explains the role of copy-on-write and 
seems clearly written.

http://www.microhowto.info/howto/export_a_block_device_using_nbd.html

Richard


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