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bio website codinghorror.com/blog
location El Cerrito, CA
age 43
visits member for 5 years, 2 months
seen Jul 8 at 6:19

Stack Overflow Valued Associate #00001

Wondering how our software development process works? Take a look!

Find me on twitter, or read my blog. Don't say I didn't warn you because I totally did.

However, I no longer work at Stack Exchange, Inc. I'll miss you all. Well, some of you, anyway. :)


Jul
8
comment What is the best nginx compression gzip level?
this jibes with results at weblogs.asp.net/owscott/iis-7-compression-good-bad-how-much which show big drop off in compression levels after level 5 and 6.
Jul
4
comment Is there anything bad about DKIM-signing mail without the key in DNS?
pretty good explanation of DMARC here support.google.com/a/answer/2466563?hl=en
Oct
26
comment Delete Files Older than (x) Days?
@Ген Best way is to look it up in the wayback machine at the Internet Archive
Dec
13
comment Windows Server unable to synchronize NTP time reliably
We were never able to get it to work reliably. I think you are right: reliable time sync in Windows Server is impossible without a domain controller. Which is totally lame.
Dec
12
comment Windows Server unable to synchronize NTP time reliably
yeah, we didn't want or need a domain controller, just a bunch of peer servers.
Dec
4
comment Should network hardware be set to “autonegotiate” speeds or fixed speeds?
just so that the final answer is here, somewhere, it was bad Broadcom drivers. We could not find any set that worked. Switching to Intel NICs fixed it 100%. blog.serverfault.com/2011/03/04/broadcom-die-mutha
Dec
4
comment Should network hardware be set to “autonegotiate” speeds or fixed speeds?
Just to make sure the final answer is here, somewhere: it was a driver problem with Broadcom. We could not resolve it with any known driver set. The only "fix" was to switch to Intel NICs.
Dec
4
comment Should network hardware be set to “autonegotiate” speeds or fixed speeds?
It was ultimately bad drivers, but the only fix we could find was to switch to Intel NICs. We now have a lifelong vendetta against Broadcom NICs.
Dec
2
comment Probability of Blade Chassis Failure
@tomtom but does the supermicro twin offer redundant psus? We just built one and I did not see that option anywhere. We bought a cold spare psu to have on hand just in case.
Oct
23
comment Configuring SuperMicro IPMI to use one of the LAN interfaces instead of the IPMI port?
note that the factory default is IPMI failover (at least on the 5 new SuperMicro based servers I just bought) which leads to a lot of.. confusion. This is dangerous!
Oct
23
comment How does IPMI sideband share the ethernet port with the host?
Make sure your IPMI firmware is up to date! If there is a large enough disconnect between the IPMI firmware version and the IPMIView software version you'll get generic, cryptic "error connecting" when trying to initiate a KVM session! Updating to latest IPMI firmware (this can be done from the IPMIView utility main menu under File) fixed it. :p
Oct
23
comment How does IPMI sideband share the ethernet port with the host?
one thing I just saw -- if there is a large enough disconnect between the IPMI firmware version and the IPMIView software version you'll get generic, cryptic "error connecting" when trying to initiate a KVM session! Updating to latest IPMI firmware fixed it. :p
Oct
23
comment Using Supermicro IPMI behind a Proxy?
VPN is working great for us as a conduit to multiple IPMI machines. Just set up a modern (128mb, fast CPU like the Asus RT-N16) router with Tomato and OpenVPN and it works a treat. OpenVPN could be easier to set up, yeah, but once set up it works!
Oct
22
comment Is it possible to reset the password on a SuperMicro IPMI interface?
this definitely works! We couldn't get subsequent commands to work because it reverts to DHCP, so we connected via DHCP and got the IP, then were able to reconfigure. I updated your answer to reflect turning DHCP off first.
Sep
25
comment Netgear smart switch: don't understand VLAN
your description helped me, at least -- and my configuration is even simpler, I just want two totally distinct networks with no crossover (so they will have only one VLAN membership per port, too)
Jul
31
comment Monitoring/controlling Intel Turbo Boost in Linux
one clarification, we did not find it necessary to disable all C-states (power saving modes) on the CPU to get Turbo Boost to work, as the linked post implies. However proper ACPI support in the BIOS and in the OS is absolutely critical.
Jul
31
comment Problem loading cpufreq module
we had trouble with Xen not allowing us to enable ACPI. When we switched away from the Xen kernel to plain Debian, it worked fine. So this ACPI issue can be specific to Xen or at least some versions of it.
Jul
20
comment Generally, how do technicians connect to the server machine for management?
answering off-topic questions implicitly encourages them.
Jun
16
comment Dynamically blocking excessive HTTP bandwidth use?
Thanks, I added that image
Jan
27
comment How does a CPU ever go Idle enough to enter deeper C states?
this is a good question, but I'm not so sure it's really a sysadmin question. It's really a question for kernel programmers with hardware experience..