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Grex > Helpers > #142: Grex System Problems - Summer 2005 | |
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| Author |
Message |
| 25 new of 281 responses total. |
gelinas
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response 150 of 281:
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Aug 3 02:36 UTC 2005 |
Most of the old modems didn't work reliably. I think they were recycled.
Or just trashed. I kept one or two.
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keesan
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response 151 of 281:
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Aug 4 01:54 UTC 2005 |
Dan G bought a bunch of 28.8K modems at Property Disposition. Bill L would
like to get them going. He is experienced with modems and grex is his only
net connection so he has lots of incentive. Do you know who has them?
They came without the required software or instructions.
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scott
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response 152 of 281:
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Aug 4 02:06 UTC 2005 |
dang probably still has those modems. I recall that there was a rather
interesting problem - they had some kind of nonstandard firmware, and he
couldn't find documentation or figure it out.
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keesan
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response 153 of 281:
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Aug 4 02:16 UTC 2005 |
That is what Bill hopes to figure out. He has a setup for testing phones and
modems offline, and a reason for spending time on this. I will write dang.
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davel
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response 154 of 281:
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Aug 4 14:50 UTC 2005 |
Connecting with ssh, my first try got a message "server refused to allocate
pty". Tried again & got in.
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mynxcat
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response 155 of 281:
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Aug 4 15:33 UTC 2005 |
Through telnet, my first try gave me all ports are busy. Worked on the second
try.
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mcnally
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response 156 of 281:
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Aug 4 16:07 UTC 2005 |
It appears the idle zapper has died again.. I'll restart it.
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keesan
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response 157 of 281:
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Aug 4 16:55 UTC 2005 |
I connected with dang, who will deliver the modem bank to me or Bill soon.
Thanks, Scott.
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keesan
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response 158 of 281:
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Aug 4 18:20 UTC 2005 |
SOmeone please kill the triludaa account, which is using up a lot of cpu time.
A couple minutes ago load average was 4.5, now it is 5.5.
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mcnally
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response 159 of 281:
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Aug 4 18:24 UTC 2005 |
> Someone please kill the triludaa account, which is using up a lot of cpu
Using a lot of CPU is not (by itself) justification for killing an account.
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keesan
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response 160 of 281:
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Aug 4 20:52 UTC 2005 |
When 25% of all cpu time is being used by users, and 23.5% of this is one
user, is this justification? It looks like vandalism to me.
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mcnally
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response 161 of 281:
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Aug 4 21:07 UTC 2005 |
You haven't given close to enough information to make that decision.
The user could have been running a compiler. Or a program that performs
repeated numerical calculations. Or any number of other things..
OR they could have been vandalizing the system.. Without more information
than you have given, however, there's no reason to conclude that the last
of those options MUST have been their motivation.
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keesan
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response 162 of 281:
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Aug 4 21:39 UTC 2005 |
This particular user has vandalized the system before. It was running bash,
and shortly before this 'user www' was tying up just as much cpu time.
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keesan
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response 163 of 281:
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Aug 4 21:48 UTC 2005 |
Load average just under 6, Triludaa still running bash, about 28% of cpu time.
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kentn
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response 164 of 281:
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Aug 5 02:29 UTC 2005 |
Probably sending out the e-mails I've been getting the last couple days from
multiple users on grex, including triludaa. Looks like they are using
the passwd file for information. "Hello <user full name>,<location> take
care".
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keesan
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response 165 of 281:
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Aug 5 03:40 UTC 2005 |
I got three of those things today. Perhaps we could set a limit on the number
of mails sent per day per user?
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mynxcat
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response 166 of 281:
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Aug 5 04:50 UTC 2005 |
i got the same emails
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jadecat
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response 167 of 281:
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Aug 5 12:09 UTC 2005 |
Me too.
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nharmon
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response 168 of 281:
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Aug 5 12:38 UTC 2005 |
The e-mails you got were generated by a script that some user had in his/her
homedir. The permissions were set to execute only (no read). Once we found
out what it was doing, we stopped the process and reported it to Remmers, who
locked the account, and locked the script.
Anyway, triludaa has been working on some programming projects. Unless he is
interfering with other people's use of Grex, why should he be locked?
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naftee
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response 169 of 281:
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Aug 5 12:40 UTC 2005 |
poor triludaa ;(
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remmers
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response 170 of 281:
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Aug 5 13:53 UTC 2005 |
Re #168, last paragraph: Indeed. The test for whether one is abusing
resources on a shared system like this is whether others are prevented
from doing what they want to do, or are slowed down unreasonably in
doing what they want to do. I've noticed neither. The system's always
been quick and responsive whenever I've been on it recently.
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keesan
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response 171 of 281:
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Aug 5 15:16 UTC 2005 |
I found the system to be extremely sluggish when the load average was 5.
I would type a sentence and wait 30 - 60 sec for it to appear.
Perhaps this was due to my ISP being slow?
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jadecat
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response 172 of 281:
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Aug 5 15:29 UTC 2005 |
I was just saying that I got the mail- nothing else intended.
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mcnally
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response 173 of 281:
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Aug 5 16:10 UTC 2005 |
I was logged on during much of the period that Sindi was complaining
about (as shown by my responses interleaved with her complaints) and
found the system responsiveness to be pretty normal during that time.
I did have a talk with triludaa about the CPU usage. He said he was
running a program he'd written and was unaware that it was taking up
so much CPU time. When I made him aware of the issue he killed the
program and agreed that he should redesign it. Only future behavior
can truly demonstrate whether he was sincere or not but I believed
that he was not intentionally harming the system (it's easy enough to
do that, frankly, if that's really your intention) and I don't think
it's wise to automatically assume malice from a user just because they
don't fit into the usual pattern of picospan/party/email use.
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keesan
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response 174 of 281:
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Aug 5 17:49 UTC 2005 |
When I was trying to compile something at grex I would be careful to run the
compiler when few other people were online, such as Sunday mornings or the
middle of the night.
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