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Jun
11
comment Find out ESXi host from VM?
This is for monitoring. I'd like to tag every VM with its Current VM Host. So I want an option where this is updated at runtime and not hardcoded into the VMs config. It doesn't have to be instance, could be something refreshed every X minutes
Jun
7
comment Choosing the right AWG for Server Power Cables?
I don't like them myself, but I'm usually not the one working in the datacenters, so I leave it up those guys.
Jun
7
comment Choosing the right AWG for Server Power Cables?
We used 14s, combined with cable arms, that is a bad choice. They end up popping out of the servers even when you velcro them in nice and tight. We are redoing everything with 16 now (Which is thinner). So this is something to keep in mind.
Mar
18
comment Entropy Deprivation on Bind / Named Servers
@vonbrand: Ah thanks for the emphasis, I'll look into that
Mar
18
comment Entropy Deprivation on Bind / Named Servers
@vonbrand: Don't see a correlation between entropy and packets per second. Would like to understand the cause more before getting into way to generate more entropy.
Mar
18
comment Entropy Deprivation on Bind / Named Servers
@ShaneMadden: Just authoritative
Sep
19
comment Disk Capacity Planning for Whisper / Graphite
Okay, so with this retention settings. Roughly: ServerCount * MetricCount * 4.5MBytes
Sep
19
comment Disk Capacity Planning for Whisper / Graphite
Thanks for this. So with the filesize, is that what it will be after an hour of collecting data, or is that what the filesize will pretty much always be? So is 4415092 representative of 5 years worth of data this retention, or is that representative of one hour of 1 minute data? Also, is that bytes or bits?
Sep
19
comment Disk Capacity Planning for Whisper / Graphite
Any chance you have some sample numbers from that (paired with retention settings). Right now I'm thinking about different time series data stores in terms of disk usage - so getting graphite live for that is bit a of a todo.
Sep
17
comment Disk Capacity Planning for Whisper / Graphite
Ya, that math is straightforward, I'm really just looking more on how Graphite stores it data - can make major differences at scale. The only thing I have found is that according to the docs it is not very space efficient (Probably because it counts on fairly aggressive rollups).
Aug
1
comment How to edit TCP window size from iptables?
Have to admit, pretty curious as to why you would want to do this?
Mar
5
comment When using TCP load balancing with HAProxy, does all outbound traffic flow through the LB?
@TimvanElsloo: The network stack will the load balancers IPs, if you add option forwardfor HAProxy will add an HTTP header, X-Forwarded-For IIRC, with the original IP.
Feb
14
comment IOAT enabled but not being used with Linux?
@mdpc: CentOS 6.3, tried a much newer kernel to see if it would help, but it didn't. This was a secondary issue discovered when having high si% on ksoftirqd with ipsec traffic (not that I expect offloading on the ipsec traffic itself, but would seems there is no ioatdma at all.
Jan
23
comment SNMP Deprecated in Windows Server 2012
Currently trying to read up on CIM, wondering who else supports it, I do see the "SBLIM project"
Nov
30
comment Choosing the right AWG for Server Power Cables?
Doesn't voltage matter as well?
Nov
30
comment Choosing the right AWG for Server Power Cables?
@MDMarra: So as not to be confused with the floor units. From wikipedia, "The term (PDU) may refer to two major classes of hardware power devices; the first and typically the general unqualified term refers to the category of relatively higher-cost floor-mounted power distribution devices which transform one or more larger capacity raw power feeds into any number of lower capacity distributed power feeds .... The second type of PDU is sometimes called a Smart-PDU, Rack-based PDU, Intelligent PDU or simply "Power Strip" by various IT professionals"
Nov
29
comment How do SAN Certs degrade performance?
I'm testing some self-signed SANs now, can't get a measurable difference with HAProxy as the server and CURL/WGET as the clients with 2.5k names. Tried 20k names but got (35) error:1408E098:SSL routines:SSL3_GET_MESSAGE:excessive message size
Nov
29
comment How do SAN Certs degrade performance?
On a call with Comodo they told us this was the case (starts to degrade over a hundred or so). I was guessing it was maybe "processing each entry", but I'm not sure of the processing flow there -- hence my question.
Nov
28
comment What does Active, Targetset, and Active targetset mean in the Output of dfsutil /pkiinfo?
@tonyroth: "OR" The client is in a different network (subnet) within the site than OR-UTIL01, but the client's subnet is properly assigned to the same site in AD Sites and Services.
Nov
28
comment What does Active, Targetset, and Active targetset mean in the Output of dfsutil /pkiinfo?
I did read "NOTE: PKTINFO indicates a successful connection to the referral returned by listing it as ACTIVE" So maybe NY-FS01 is blocked by the firewall (pretty sure it is from this client). Just Active means the connection is working, ACTIVE TARGETSET means it is Active and that connection is being used? But what would just TARGETSET mean?