IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 17 February 2023 (all times are UTC)
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| 04:13 | <alkisg> !tftp
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| 04:13 | <ltspbot> tftp: To test if your TFTP server is working, try this on the server (or from another PC): busybox tftp -g -r /ltsp/ltsp.ipxe -l /tmp/ltsp.ipxe localhost
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| 06:38 | <vsuojanen[m]> hi, do you remember if is there is any discussion or documentation how to make <100mbps clients nfs homedirectory connection faster? I have just two specific clients with same specs and speed, the clients have issues with nfs autologin when they boot, it seems autologin happens too fast when RELOGIN_TIMEOUT=5. sometimes even the home is not mounted. it works stable when RELOGIN_TIMEOUT=15
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| 06:46 | <vsuojanen[m]> i know the problems is the old slow cable that needs fix also but same desk works with other client hardware
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| 06:54 | <alkisg> vsuojanen: I'm not sure what you're asking, if a connection is <100 mbps due to a cabling problem, how would you make it faster using software?
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| 06:58 | <vsuojanen[m]> not quite that, I remember two or three years ago there was some discussion about nfsroot settings and if i run now /usr/lib/klibc/bin/nfsmount from the client when they mount homedir does it need something with slow connections
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| 06:59 | something extra
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| 07:02 | <quinox> you want to reduce the initial mount time, not throughput?
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| 07:02 | <vsuojanen[m]> yes
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| 07:04 | <quinox> I have no direct ideas, but you could do `man 5 nfs` and then try out any option that sounds useful
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| 07:05 | I would suggest fixing the cabling though if possible :)
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| 07:05 | (does the bad cables also cause packet loss?)
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| 07:05 | <vsuojanen[m]> i want to have the cable fixed of course sure
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| 07:08 | yes, some busy hours in the day. I don't know why but users say it's hanging nightly :)
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| 07:11 | <quinox> if the ping stays consistent but you got packet loss I would _reduce_ timeout values and _increase_ retry attempts. If the pick fluctuates and you got packet loss then ... ¯\_(ツ)_/¯
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| 07:11 | s/pick/ping/
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| 07:12 | I see something called "soft timeout" that causes increased responsiveness with an added risk of data corruption
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| 07:14 | I would be hesitant to even go this route: nothing as permanent as temporary workarounds. If people feel the pain of the bad cables right now this gives you more leverage to get it fixed, I'd say
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| 07:14 | <vsuojanen[m]> thanks so sum up if I really want there are some settings i could try with /usr/lib/klibc/bin/nfsmount options?
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| 07:15 | it has not been any better without ltsp clients so that's why i call it stable client with RELOGIN_TIMEOUT=15
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| 07:17 | <alkisg> vsuojanen: solving bad packet handling in all the related linux software may take 100 years. Solving the cabling issue may take 10 minutes. Choose where to spend your effort wisely :)
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| 07:17 | <alkisg> A couple of years ago I was investigating nfs speed issues. NOT bad packet handling for NFS.
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| 07:17 | It's a completely different topic
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| 07:18 | The speed issues were related to buffering and caching
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| 07:18 | <vsuojanen[m]> thanks. I'm only thinking possible shortcuts so not too bad yet
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| 13:03 | <vsuojanen[m]> quinox: alkisg Have a nice weekend
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| 13:50 | <quinox> you too!
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| 15:01 | <alkisg> You too :)
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