504 reputation
38
bio website
location Ventura, CA
age 43
visits member for 3 years, 10 months
seen Sep 18 at 18:35

Aug
30
comment Are Anti Static Foam Cleaners OK for cleaning all parts of a PC?
You run the risk of doing mechanical damage by using any type of wipe on electronic components. Depending on the age of the hardware, you may also find your wipes contaminated by lead, requiring special disposal precautions. Compressed air is your friend...just don't let it overspeed any fans; they can be ruined by over-zealous air blowoff.
Aug
29
comment PDU management interface has low availability - product flaw or isolated issue
Killed the ping...no such luck fixing access via https. The PDUs are sometimes unavailable, and sometimes allow me to log in, then hang halfway through loading the home screen. I don't mind doing everything via telnet, but it just doesn't seem like things should be this unreliable. @ewwhite: Thanks for sharing your experience. I was really hopeful that reducing monitoring traffic would improve things.
Aug
29
comment PDU management interface has low availability - product flaw or isolated issue
Disabling http and https monitoring did not improve availability using the web UI (https), though several tests via telnet were 100% reliable (small sample size), which is an improvement. The only remaining monitoring is via ping and snmp. Perhaps it's time to disable ping at this point.
Aug
29
comment PDU management interface has low availability - product flaw or isolated issue
We also had http and https monitoring configured. I've disabled it and will retest soon.
Aug
29
comment PDU management interface has low availability - product flaw or isolated issue
I'm using availability in the loosest sense - basically my subjective of "can we remotely manage the PDU when we want to". We do have a monitoring solution (LogicMonitor) looking at several SNMP datapoints every 5 min and ping every 1 min. Strangely, the PDUs appear generally healthy from the monitoring system's perspective, yet when we want to log in and actually do something in them, they rarely work the first few attempts, and occasionally lock up to the point of requiring a hard restart (after which, monitoring confirms the unhappiness).
Aug
29
comment PDU management interface has low availability - product flaw or isolated issue
@Andrew: They're owned by our colo provider. With our move to cage space, we'll be purchasing our own with the express goal of avoiding buying lemons.
Aug
28
comment PDU management interface has low availability - product flaw or isolated issue
@HopelessN00b: I was trying to keep this away from requesting a specific product recommendation. I've had ops issues with a particular component and am trying to leverage the expertise in the community to avoid a repeat scenario. I've edited the title to better reflect my intent.
Jul
26
comment How does I/O performance on Intel E5 procs change with and without QPI
@pfo, so the E5-1410 has an on-die PCIe 3.0 controller, but it's disabled in favor of the DMI 2.0 bus?
Jul
26
comment How does I/O performance on Intel E5 procs change with and without QPI
@Chopper3, valid, but peripherals can't use QPI directly; they have to go through an IOH. While I agree with your answer, it seems to be comparing apples to oranges. (qdpma.com/SystemArchitecture/SystemArchitecture_QPI.html)
Jul
25
comment How does I/O performance on Intel E5 procs change with and without QPI
Agreed, but my question is targeted at structural/spec differences between the two processor families rather than "what will run my app the fastest?"
Jul
25
comment How does I/O performance on Intel E5 procs change with and without QPI
@TheCleaner: Thanks. That was the one post that I found that I didn't link to in my question. I cannot reconcile the claim that "QPI doesn't apply since it's only used between processors" with all of the other information that I've found regarding QPI with suggests that it is an IO fabric, albeit one that is optimized for multiprocessor systems.
Jan
26
comment How do I find which process is dropping my TCP ACKs on a dual-homed machine?
Somehow, rp_filter ended up turned on, despite being commented out in sysctl. I forced it off, but still no change.
Jan
26
comment How do I find which process is dropping my TCP ACKs on a dual-homed machine?
Route table added to the original post. rp_filter is not enabled. I am not using iproute2.