[NBLUG/talk] thought I'd ask here also - Anyone have any experience with LTSP?

gandalf at sonic.net gandalf at sonic.net
Fri Jan 23 17:35:10 PST 2015


Haven't really looked hard at these yet, but here's what I get on 
ifconfig and ethtool:


root at ltsp:~# ifconfig
bond0     Link encap:Ethernet  HWaddr 40:f2:e9:0a:59:74
           inet addr:10.17.17.17  Bcast:10.17.17.255  Mask:255.255.255.0
           inet6 addr: fe80::42f2:e9ff:fe0a:5974/64 Scope:Link
           UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
           RX packets:3268517354 errors:0 dropped:2380046 overruns:0 
frame:0
           TX packets:13657964403 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:592762781301 (592.7 GB)  TX bytes:18485630452486 
(18.4 TB)

eth0      Link encap:Ethernet  HWaddr 40:f2:e9:0a:59:74
           UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
           RX packets:3266137277 errors:0 dropped:0 overruns:0 frame:0
           TX packets:2973955224 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:592148079085 (592.1 GB)  TX bytes:3887567471905 (3.8 
TB)
           Memory:a9a60000-a9a80000

eth1      Link encap:Ethernet  HWaddr 40:f2:e9:0a:59:75
           UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
           RX packets:1190037 errors:0 dropped:1190019 overruns:0 frame:0
           TX packets:2712184181 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:307351015 (307.3 MB)  TX bytes:3501979619371 (3.5 TB)
           Memory:a9a40000-a9a60000

eth2      Link encap:Ethernet  HWaddr 40:f2:e9:0a:59:76
           UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
           RX packets:1190040 errors:0 dropped:1190022 overruns:0 frame:0
           TX packets:7971824998 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:307351201 (307.3 MB)  TX bytes:11096083361210 (11.0 
TB)
           Memory:a9a20000-a9a40000

lo        Link encap:Local Loopback
           inet addr:127.0.0.1  Mask:255.0.0.0
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING  MTU:16436  Metric:1
           RX packets:2487516947 errors:0 dropped:0 overruns:0 frame:0
           TX packets:2487516947 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:17392701015352 (17.3 TB)  TX bytes:17392701015352 
(17.3 TB)

usb0      Link encap:Ethernet  HWaddr 42:f2:e9:0a:59:73
           inet addr:169.254.95.120  Bcast:169.254.95.255  
Mask:255.255.255.0
           inet6 addr: fe80::40f2:e9ff:fe0a:5973/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:2314233 errors:0 dropped:0 overruns:0 frame:0
           TX packets:2498909 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:189279256 (189.2 MB)  TX bytes:282020660 (282.0 MB)



root at ltsp:~# ethtool eth0
Settings for eth0:
         Supported ports: [ TP ]
         Supported link modes:   10baseT/Half 10baseT/Full
                                 100baseT/Half 100baseT/Full
                                 1000baseT/Full
         Supported pause frame use: No
         Supports auto-negotiation: Yes
         Advertised link modes:  10baseT/Half 10baseT/Full
                                 100baseT/Half 100baseT/Full
                                 1000baseT/Full
         Advertised pause frame use: No
         Advertised auto-negotiation: Yes
         Speed: 1000Mb/s
         Duplex: Full
         Port: Twisted Pair
         PHYAD: 1
         Transceiver: internal
         Auto-negotiation: on
         MDI-X: Unknown
         Supports Wake-on: pumbg
         Wake-on: g
         Current message level: 0x00000003 (3)
                                drv probe
         Link detected: yes

root at ltsp:~# ethtool eth1
Settings for eth1:
         Supported ports: [ TP ]
         Supported link modes:   10baseT/Half 10baseT/Full
                                 100baseT/Half 100baseT/Full
                                 1000baseT/Full
         Supported pause frame use: No
         Supports auto-negotiation: Yes
         Advertised link modes:  10baseT/Half 10baseT/Full
                                 100baseT/Half 100baseT/Full
                                 1000baseT/Full
         Advertised pause frame use: No
         Advertised auto-negotiation: Yes
         Speed: 1000Mb/s
         Duplex: Full
         Port: Twisted Pair
         PHYAD: 1
         Transceiver: internal
         Auto-negotiation: on
         MDI-X: Unknown
         Supports Wake-on: pumbg
         Wake-on: g
         Current message level: 0x00000003 (3)
                                drv probe
         Link detected: yes

root at ltsp:~# ethtool eth2
Settings for eth2:
         Supported ports: [ TP ]
         Supported link modes:   10baseT/Half 10baseT/Full
                                 100baseT/Half 100baseT/Full
                                 1000baseT/Full
         Supported pause frame use: No
         Supports auto-negotiation: Yes
         Advertised link modes:  10baseT/Half 10baseT/Full
                                 100baseT/Half 100baseT/Full
                                 1000baseT/Full
         Advertised pause frame use: No
         Advertised auto-negotiation: Yes
         Speed: 1000Mb/s
         Duplex: Full
         Port: Twisted Pair
         PHYAD: 1
         Transceiver: internal
         Auto-negotiation: on
         MDI-X: Unknown
         Supports Wake-on: pumbg
         Wake-on: g
         Current message level: 0x00000003 (3)
                                drv probe
         Link detected: yes

root at ltsp:~# ethtool eth3
Settings for eth3:
         Supported ports: [ TP ]
         Supported link modes:   10baseT/Half 10baseT/Full
                                 100baseT/Half 100baseT/Full
                                 1000baseT/Full
         Supported pause frame use: No
         Supports auto-negotiation: Yes
         Advertised link modes:  10baseT/Half 10baseT/Full
                                 100baseT/Half 100baseT/Full
                                 1000baseT/Full
         Advertised pause frame use: No
         Advertised auto-negotiation: Yes
         Speed: Unknown!
         Duplex: Unknown! (255)
         Port: Twisted Pair
         PHYAD: 1
         Transceiver: internal
         Auto-negotiation: on
         MDI-X: Unknown
         Supports Wake-on: pumbg
         Wake-on: g
         Current message level: 0x00000003 (3)
                                drv probe
         Link detected: no



On 2015-01-23 16:11, Steve S. wrote:
> Just a sudden thought... might a NIC be mis-set to a slow speed,
> causing all sorts of funky backups, mis-queueing, context-switching,
> etc...?
> 
> On Fri, Jan 23, 2015 at 4:00 PM, Jordan Erickson
> <jerickson at logicalnetworking.net> wrote:
> 
>> Can you give us a bit more detail as to your network/server setup?
>> You
>> say you're running 24cpus and 128gigs. Might be a logical
>> explanation to
>> house NFS on its own server.. What's your network speed? Thin (or
>> fat)
>> client specs? Distro?
>> 
>> Cheers,
>> Jordan
>> 
>> On 01/23/2015 03:52 PM, gandalf at sonic.net wrote:
>>> It's actually a NFS to a separate server. I'm not sure why it was
>> done
>>> that way. To me this would probably further congest the network
>> while
>>> not being nearly as fast as a high performance direct disk
>> interface.
>>> 
>>> On 2015-01-23 15:00, Omar Eljumaily wrote:
>>>> Not speaking from experience with LTSP server, but my guess
>> would be
>>>> that it is a disk io bottleneck.
>>>> 
>>>> 
>> 
> http://stackoverflow.com/questions/21617500/understanding-load-average-vs-cpu-usage
>> [1]
>>>> 
>>>> 
>>>> I believe that web browsers cache on disk most of their content
>> and
>>>> media before rendering it.  That's a lot of users hitting a
>> single
>>>> disk drive or array.  Do you have a large RAID array?  SSD?
>>>> 
>>>> Omar
>>>> 
>>>> On 1/23/2015 2:19 PM, gandalf at sonic.net wrote:
>>>>> 
>>>>> I'm seeing very high load averages with low CPU usage. The two
>> main
>>>>> culprits are chrome and firefox. I've got about a hundred users
>>>>> sharing the LTSP server which has some rich resources (24cpus
>> and
>>>>> 128gigs).
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> _______________________________________________
>>>>> talk mailing list
>>>>> talk at nblug.org
>>>>> http://nblug.org/cgi-bin/mailman/listinfo/talk [2]
>>>> 
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> 
> --
> 
> "When I became a man I put away childish things, including the fear of
> childishness and the desire to be very grown up."      -CS Lewis
> 
> Links:
> ------
> [1]
> http://stackoverflow.com/questions/21617500/understanding-load-average-vs-cpu-usage
> [2] http://nblug.org/cgi-bin/mailman/listinfo/talk
> 
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