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location Netherlands
age 40
visits member for 2 years, 10 months
seen 22 hours ago

Jun
30
answered Expire Files In A Folder: Delete Files After x Days
May
5
comment Why do we still use power supplies on datacenter servers?
As an engineer, the main question is why people run their AC at 50 Hz or 60 Hz. PSU's are so big because the frequency is so low. But in a DC environment behind UPS'es, you could pick any frequency. At 500 Hz, the PSU's would be smaller and more efficient. (Basically, your caps can be 10x smaller because each period now lasts 2 ms instead of 20 ms)
Apr
18
comment Bash: mv directory one at a time
Not if you do it across a network connection. Then all files are downloaded and uploaded again.
Mar
24
comment How does Windows handle program dependencies?
@FilipeYaBaPolido: Your hate is particularly misplaced since the VC++2008 runtime is for C++ applications, not .Net applications. Obviously .Net applications need the .Net framework and C++ applications need the C++ framework(runtime), quite simple really. Now a particular software package may contain both C++ and .Net parts so the two are not exclusive.
Mar
10
comment alternative directory for files if not exists
@JennyD: That's a valid answer, not a reason to close as duplicate. You may of course refer in your answer to the existing answer for implementation details, but please also include the reason why mod_rewrite is the correct solution.
Mar
10
comment alternative directory for files if not exists
Not a duplicate, that already presumes mod_rewrite is a given, and the question is about its use.
Nov
5
comment What are the advantages of tape drives?
That's another historical thing. It used to be that you couldn't efficiently move HDDs (kilograms per megabyte limitation) and using a network to offsite backup was even more impossible. Today of course neither limitation is relevant. A 10 Gbps umbilical between your datacentres is feasible, and disk capacities are measured in terabytes per kilo.
Nov
5
comment What are the advantages of tape drives?
The reason you don't need an autoloader for HDD media is because it's entirely possible to "load" all of them at the same time. To get data from a disk, it just needs power and a data connection, which requires not a lot more than a few wires. That scales easily. To get data of a tape, you need an entire drive, and it's not feasible to have an entire drive per tape.
May
3
comment How to make google chrome only for internal use?
Sounds like another braindead corporate policy. Pain without a gain.
Mar
29
comment Why does a hardware router perform better than a Linux router with better specs (RAM & CPU)?
It works both ways, too. The hardware doesn't need to deal with rare, complex cases either. It just throws those to software. Routing loops? Don't try to figure out in hardware how to deal with those.
Jan
18
comment Is there any DNS system or Service that is HTTPS aware?
This would also require all DNS clients to cooperate; standard DNS clients do not include the application. Hence, there is no way that the DNS server could respond differently, even if you could modify the DNS server.
Sep
24
comment How it was detected if last ACK lost in TCP connection termination procedure?
@sonali: It's a fundamental issue known as the "Two Generals problem". You cannot detect the loss of the last message, because that would require another "past-the last" message.
Sep
21
answered How it was detected if last ACK lost in TCP connection termination procedure?
Sep
21
comment Utility to LOGICALLY compare two xml files?
XML InfoSet can actually specify order constraints, so the idea that XML is unordered is debatable. And you're certainly not allowed to merge the attributes of two elements just because the elements have the same tag. That would only be valid in specific XML applications, but a generic tool will not assume that.
May
28
awarded  Commentator
May
28
comment Convert a Smart Array RAID5 array to a RAID6 (ADG) variant
@SmallClanger: RAID6 can survive any 2 disk failures; RAID1+0 has a 33% chance of data loss when two disks fail.
May
25
awarded  Teacher
May
25
answered Is carpet, or another floor covering, appropriate for a server room?
Feb
13
comment Blade servers in small office server room (90db)?
"Long periods of repeated exposure to workplace noise levels between 75 dB(A) and 80 dB(A) present a small risk of developing a hearing disability". 90dB is twice as loud, and therefore simply unacceptable. Manageable doesn't even enter into the picture.
Jan
23
comment Available EMP protection devices?
@TevoD: No, but if the UPS is close enough to the faraday cage (either inside or outside) then the conductors (antenna's) will be too short to effectively radiate.