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Good Afternoon. We're facing some problems with time synchronization. I would like to know if the NTP is related to this problem because we are thinking the clocks aren't synchronized among the hosts and the servers since, for example, the delay and the...
Started by hubloko on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at net):
Tzconfig then put ntpdate -u pool.ntp.org on the crontab so they all will have the same time.
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We have a client and a server. I want to measure the response-time of the network between them. When I send a request to server it should immediate respond to my request, it should be like a ping request so that there will be no processing time at the...
Started by Ashish Bhadiyadra on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
If you want to measure network speeds, just grab System.nanoTime() before you need to distinguish between the time....
Apparently there is a way to generate an ICMP ping in Java 5 and later .
The current timestamp to measure round trip time.
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I have a winform app that needs to be aware of when a SQL server is available so as to allow the Merge Syncing functionality. I have tried variations of the below, which work on a one time basis, but I would like to come up with something a little more...
Started by Refracted Paladin on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Since such changes are associated with network availability changes (cable plug in, WiFi join.
It uses the NotifyAddrChange table.
An entry on my blog showing how to detect network availability changes .
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The proc(5) manpage describes iowait as "time waiting for IO to complete". This was mostly explained in an earlier question. My question is: while waiting in blocking IO, does this include waiting on blocking network IO, or only local IO?
Started by Alex Jurkiewicz on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at serverfault):
As far as I know, this doesn't have anything....
It means waitingthe iowait time is the amount of time a process spends in the kernel I/O scheduler.
However, it will include time spent waiting for network file systems like NFS.
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It looks like there are two options for providing network time settings to a DHCP client; option 004 and option 042. The description for 004 is "Time Server", while 042 specifies NTP. Is there a reason to use one or the other, or is it just vendor preference...
Started by TimM on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at serverfault):
This is the preferred....
Option 042 refers to NTP (RFC 1769 ) Option 004 refers to TIME/ITP (RFC 868 ) Source
From a Google search, first result :
Option 004 specifies servers that provide TIME/ITP (as per RFC 868 that provide NTP/SNTP (RFC 1769).
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How often do you roll out new network switches/ how often are the older ones replaced?
Started by Bump on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at serverfault):
The switches at the core are the ones where you usually ... .
I replace switches:
When they fail When I need switches that support a new capability (1gb, PoE) I rarely get rid of old working switches, but frequently they get moved into less critical roles .
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My situation is the following. I have an external HD (320 GB) and where I've set-up Time Machine backups since about 2 month now. I really love it except for the reason that my external HD is not network-capable. So for doing backups I have to manually...
Started by Juri on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at superuser):
Once upon a time I had....
I do Time Machine backups for two MacBook's across the network using SMB and Windows Home Server had no major issues except forgetting to set my exclusion list correctly, and Time Machine runs share.
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I am using my old Pentium 4 to share a 1 TB hard drive and 2 printers on my home network. The only problem with this is that I have to leave the computer on all the time and it feels like an awful waste.. Is there a better solution? Or a way to minimise...
Started by andrew on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at superuser):
Extending the life of....
For the HD :
"The 4-Port USB Net ShareStation enables everyone with access to a local network to access four USB blazing speeds.
Your two options are to move the devices to another computer or to the network itself.
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The Wikipedia entry doesn't give details and the RFC is way too dense. Does anyone around here know, in a very general way, how NTP works?
I'm looking for an overview that explains how Marzullo's algorithm (or a modification of it) is employed to translate...
Started by Waylon Flinn on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
NTP assumes that the time spent on the network is the same for sending to remove the time that the server spent processing the request (Y-X), leaving only the network traversal time, so that....
When it received it (B).
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My house is kind of long-ish, and I need wireless coverage across the whole house. I have 4 roommates, and our rooms are all at opposite ends of the house. The cable modem can't be moved. Running ethernet cables isn't really an option, but many of the...
Started by Bob Aman on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at superuser):
For the 'time' part of your question:
You may want to do a site survey to find, on a map, the wireless network coverage....
For the 'money' part of your coverage in remote areas .
I'm quite willing to throw both money and time at the problem.
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