NTP server Log file - NTP

This is a discussion on NTP server Log file - NTP ; What will be the size of each log file created against each request, which will be stored in the NTP server, under standard configuration ? Does this play an important role in dimensioning the NTP server?? Also kindly let us ...

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  1. NTP server Log file

    What will be the size of each log file created against each request,
    which will be stored in the NTP server, under standard configuration ?

    Does this play an important role in dimensioning the NTP server??



    Also kindly let us know the parameters need to be considered for
    dimensioning the NTP server.



    Regards
    Manikandan

  2. Re: NTP server Log file

    On 2007-12-20, T Manikandan-Q3926C wrote:

    > What will be the size of each log file created against each request,
    > which will be stored in the NTP server, under standard configuration ?


    ntpd does not log polls from clients.

    The current Official NTP Reference Implementation Distribution Documentation
    discusses Monitoring Options at
    http://www.eecis.udel.edu/~mills/ntp/html/monopt.html

    --
    Steve Kostecke
    NTP Public Services Project - http://support.ntp.org/

  3. NTP server Dimensioning process

    Can anyone brief how will be the dimensioning process for the NTP server
    in the following scenario?

    NTP to be implemented on the Server running RHEL [Red hat Enterprise
    Linux]
    To handle at least 100000 clients in a network.

    How the RAM, CPU and the HDD need to be dimensioned?

    Regards
    Manikandan

  4. Re: NTP server Dimensioning process

    In article <66789B449BDE4F4588F70408F8908D74020D7BBB@ZMY16EXM6 7.ds.mot.com>,
    q3926c@motorola.com (T Manikandan-Q3926C) wrote:

    > NTP to be implemented on the Server running RHEL [Red hat Enterprise
    > Linux]
    > To handle at least 100000 clients in a network.


    I've not had any experience of actually running such a size of server,
    so you had maybe better wait to see if anyone challenges the following:

    > How the RAM, CPU and the HDD need to be dimensioned?


    RAM: significantly less than the minimum spec for RHEL and negligible
    compared with that on the minimum specification machine acceptable
    as a donation to a UK charity. Kernel buffer space for IP packets
    might be the main issue, which may depend on your network drivers.
    (ntpd locks down the whole of libc, so can appear large, but most
    of that locked down code is shared with other applications; if you
    are concerned about RAM, don't use RHEL, use an embedded environment
    with just what is needed in the libraries.)

    HDD: negligible compared with RHEL and the above charity spec;

    CPU: (this is more speculative) negligible compared with the charity
    specification and small compared with that needed to run RHEL in
    graphical mode. The main source of uncertainty is likely to be
    the network driver. You do need hardware floating point, but that
    has been satisfied by the charity requirements for almost ten years.

    Basically, I'd suggest that your decision to use RHEL indicates that you
    are not working anywhere near the limits.

    PS Never start a new thread by replying to an existing article. People
    ignoring the existing thread will not have seen your thread.

  5. Re: NTP server Dimensioning process

    T Manikandan-Q3926C wrote:
    > Can anyone brief how will be the dimensioning process for the NTP server
    > in the following scenario?
    >
    > NTP to be implemented on the Server running RHEL [Red hat Enterprise
    > Linux]
    > To handle at least 100000 clients in a network.
    >
    > How the RAM, CPU and the HDD need to be dimensioned?


    If the clients are running the reference implementation of ntpd then every
    single client will send maximum 1 request every 64 seconds, i.e. 100000
    client produce a mean load of 100000/64~1560 req/s.

    Even a AMD Geode CPU running at 500 MHz with 128 MB RAM here can handle more
    than 15000 req/sec, i.e. 10 times as much as you need. The relevant HDD
    space you need for ntpd depends only on the amount of log files you want to
    keep, e.g. the loopstats file and its history.

    Martin
    --
    Martin Burnicki

    Meinberg Funkuhren
    Bad Pyrmont
    Germany

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