According to the Spiral (Mar 22 2012)


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Profile Michel448a
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Message 1210468 - Posted: 26 Mar 2012, 21:36:55 UTC

lol is ? or isn't ?

to be or not to be ?
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Message 1210470 - Posted: 26 Mar 2012, 21:38:53 UTC - in response to Message 1210468.
Last modified: 26 Mar 2012, 21:39:04 UTC

Seek and Ye shall find
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Message 1210471 - Posted: 26 Mar 2012, 21:40:51 UTC - in response to Message 1209027.

Good point, and agreed. We're also still using apache while it seems the world is moving toward nginx (I've been looking into switching at some point, if I can determine it's worth it). So yes there's some non-optimal situations in general here, and maybe others that arise sticking with Fedora... but we kind of need the bleeding edge for BOINC/SETI@home software development purposes, and don't have the management overhead to deal with multiple OS flavors. I know it sounds wimpy not wanted to deal with multiple linuxes but it actually is a real pain. Plus most of our problems with linux are kernel-related, not linux-flavor-related.

- Matt


Thanks for the update, but...

I sometimes wonder how big corporations manage to have such great uptime when we keep hitting fundamental flaws with linux getting locked up under heavy load. I think the answers are they (a) have massive redundancy (whereas we generally have very little mostly due to lack of physical space and available power), (b) have far more manpower (on 24 hour call) to kick machines immediately when they lock up, and (c) are under-utilizing servers (whereas we generally tend to push everything to their limits until they break).

(d) For their production servers they don't choose Fedora, which is meant for desktops, really. (Too bleeding edge software, also many experimental bells and whistles turned on in their compiled kernel!).


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Message 1210558 - Posted: 27 Mar 2012, 1:54:22 UTC

CERN is using Scientific Linux on their programs, which is Red Hat plus some scientific libraries. I am seeing them run in the BOINC_VM window at Test4Theory@home and it seems very stable, also using very little RAM (256 MB), while my Solaris Virtual Machine needs 1.5 GB RAM just to run SETI@home.
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Message 1210613 - Posted: 27 Mar 2012, 7:39:53 UTC - in response to Message 1210470.

What HHG means is for GeorgeM to be mentioned in the Hosts list, which now only shows:

anakin: Intel Server (2 x 2.8GHz Xeon, 4 GB RAM)
bane: Intel Server (2 x quad-core 2.66GHz Xeon, 4 GB RAM)
bruno: Intel Server (2 x 2.66GHz Xeon, 8 GB RAM)
carolyn: Intel Server (2 x quad-core 2.4GHz Xeon, 96 GB RAM)
jocelyn: Sun V40z (4 x 2.2GHz Opteron, 28 GB RAM)
lando: Intel Server (4 x 3.20GHz Xeon, 4 GB RAM)
marvin: Intel Server (2 x 2.66GHz Xeon, 16 GB RAM)
maul: Intel Server (4 x 2.66GHz Xeon, 8 GB RAM)
oscar: Intel Server (2 x quad-core 2.4GHz Xeon, 96 GB RAM)
synergy: Intel Server (2 x hexa-core 2.53GHz Xeon, 96 GB RAM)
thinman: AMD Server (2 x 2.4GHz Opteron, 16 GB RAM)
thumper: Sun Fire X4500 (2 x dual-core 2.6GHz Opteron, 16 GB RAM)
vader: Intel Server (4 x dual-core 3GHz Xeon, 16 GB RAM)
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Message 1210628 - Posted: 27 Mar 2012, 8:29:40 UTC - in response to Message 1210613.

Just a FYI for those interested, the 5 replacement drives arrived at SETI today and all tested out okay.
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Message 1210637 - Posted: 27 Mar 2012, 10:18:14 UTC - in response to Message 1210558.

CERN is using Scientific Linux on their programs, which is Red Hat plus some scientific libraries. I am seeing them run in the BOINC_VM window at Test4Theory@home and it seems very stable, also using very little RAM (256 MB), while my Solaris Virtual Machine needs 1.5 GB RAM just to run SETI@home.
Tullio

...but Scientific Linux CERN is very conservatively out-of-date. Nearly all CERN machines are still running SLC5 which is kernel 2.6.18-274, so I have to run that on our user machines too. I have one machine running on SLC6 which is 2.6.32-220.
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Message 1210793 - Posted: 28 Mar 2012, 0:12:16 UTC

I love these details about the server upgrades. Keep us updated. :-)
Thanks!

(5 out of 24 drives is a LOT, I feel your pain there... I'd have expected 2 duds maximum out of that number, and maybe a third within 6 months)

-Dave

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Message 1210798 - Posted: 28 Mar 2012, 0:18:57 UTC - in response to Message 1209027.
Last modified: 28 Mar 2012, 0:33:36 UTC

Thanks for the update, but...

I sometimes wonder how big corporations manage to have such great uptime when we keep hitting fundamental flaws with linux getting locked up under heavy load. I think the answers are they (a) have massive redundancy (whereas we generally have very little mostly due to lack of physical space and available power), (b) have far more manpower (on 24 hour call) to kick machines immediately when they lock up, and (c) are under-utilizing servers (whereas we generally tend to push everything to their limits until they break).

(d) For their production servers they don't choose Fedora, which is meant for desktops, really. (Too bleeding edge software, also many experimental bells and whistles turned on in their compiled kernel!).


That's Ubuntu's main problem too. Debian itself is stable as stable can be, but it lacks the newest hardware support. So ubuntu uses s.i.d. and testing software which IMO pushes buggy stuff out to the end user. (For my servers) I like ubuntu (server), but I always start with a minimal install and add packages I need only when really needed.

As far as what distro they should use, I'm not qualified to put an opinion on that out there.

I am a debian, where as most businesses/organizations are redhats (or CENTOS)

-Dave

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Message boards : Technical News : According to the Spiral (Mar 22 2012)

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