Best effort

Hi all
I have difficulty with translating of term "best effort" what does it mean?
i know that it is QoS for synchronius interface...but why "best effort". How many efforts and which of them best?

Hi !
Mikhail
XI.QualityOfService=<QualityOfService>
Specifies how the Integration Engine should process a message. The following values are permitted:
&#9632; XI.qualityOfService=BE(Best Effort, means synchronous processing)
&#9632; XI.qualityOfService=EO(Exactly Once, means asynchronous processing with guaranteed execution exactly once)
&#9632; XI.qualityOfService=EOIO(Exactly Once in Order, means asynchronous processing using queues,
Best Effort --> Used for Synchronous Calls.
EO and EOIO --> Asynchronous Calls.
EOIO --> Asynchronous with Sequential Processing Guranteed.
Check this help:
http://help.sap.com/saphelp_nw04/helpdata/en/41/b714fe5ffc11d5b3ea0050da403d6a/frameset.htm
Thanks!
pls reward if useful

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    16.8 dBm / 12.6 dBm
    FEC Events (Down/Up):
    468069285 / 1845
    CRC Events (Down/Up):
    1578613 / 1771
    Loss of Framing (Local/Remote):
    0 / 0
    Loss of Signal (Local/Remote):
    0 / 0
    Loss of Power (Local/Remote):
    0 / 0
    Loss of Link (Remote):
    0
    HEC Errors (Down/Up):
    738099 / 1160
    Error Seconds (Local/Remote):
    0 / 0
    More Details
    Hide Details
    To reset back to the default BT Total Broadband username and password, click the 'Reset username' button.
    Reset username
    Applying...
     WAN StatusConnection information
    Line state:
    Disconnected
    Connection time:
    Not available
    Software version V100R001C01B031SP09_L_B | Time & date 13:51 08/04/2012
    Here's part of the BT speed test, still waiting................
    1. Best Effort Test: -provides background information.
    Download  Speed
    11 Kbps
    0 Kbps
    2 Mbps Max Achievable Speed
    Download speedachieved during the test was - 11 Kbps For your connection, the acceptable range of speeds is 800 Kbps-2 Mbps. IP Profile for your line is - 1.69 Mbps
    2. Upstream Test: -provides background information.
    Upload Speed
    370 Kbps
    0 Kbps
    448 Kbps Max Achievable Speed
    Upload speed achieved during the test was - 370Kbps Additional Information: Upstream Rate IP profile on your line is - 448 Kbps
    This test was not conclusive and further testing is required.This might be useful for your Broadband Service Provider to investigate the fault.
    If you wish to carry out further tests,please click on 'Continue' button.If not, please close the window using 'Exit' button and contact your ISP for further assistance with these results.
    The speed is extremely slow today, however this is nothing new as dips in and out constantly. I have left the BT Homehub 3 connected to the master socket, hopefully anyone able to assist??
    Thanks
    Mark

    Hi you are 4km from your exchange that is your line length as you have been connected 3days + and your noise margin is high i will suggest you contact the forum mods and request a noise margin reset to the default 6db this is a link to them
    http://bt.custhelp.com/app/contact_email/c/4951
    they normally reply by email or phone directly to you within 3 working days
    They are a UK based BT specialist team who have a good record at getting problems solved
    If you want to say thanks for a helpful answer,please click on the Ratings star on the left-hand side If the reply answers your question then please mark as ’Mark as Accepted Solution’

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