[Answer ID: 9791]

How long does it take to transfer files when multiple replication destination is set to one replication source?

Created 02/15/2011 18:54  |   Updated 05/06/2011 15:45
When several replication targets are set to one replication source, several transfers start to the replication targets after files are updated, therefore, more transfers gives higher loads on products, and it makes transfer speed slower. Approximate file transfer time is shown below when several replication targets are set to one replication source.

  • Environment for measurement

    image

    PC for measurement

    Structure of transfer files

    Switching HUB

    Replication source

    Replication targets

    DELL Latitude D530
    Intell®Core™2 Duo T7250 @ 2.00GHz
    2GB Memory Windows XP SP2

    Size of one file: average 2MB?
    Numbers of files:366
    Total file size:702MB

    Buffalo LSW2-GT-16NSRR

    TS-X2.0TL/R5
    RAID5 1518B Frame size

    TS-X2.0TL/R5
    RAID5 1518B Frame size


  • Result of measurement
    Time in below chart is counted from the timing copy is started. The copy starts from the condition without any files waiting for replication transfer.

    Numbers of replication targets

    Required time for copy(sec.)

    Time to complete replication (sec.)

    0

    41.7

    -

    1

    94.3

    351.4

    2

    252.5

    640.2

    3

    549.0

    938.9

    4

    1206.4

    1210.1

    6

    1816.0

    1824.0

    8

    2340.4

    2350.0

    16

    4810(Presumed value)

    4830(Presumed value)

    32

    9610(Presumed value)

    9530(Presumed value)

    64

    19210(Presumed value)

    19230(Presumed value)



Details


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