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Status Delivered
Workspace Storage Protect Family
Categories Product functionality
Created by Guest
Created on Dec 2, 2013

RELATED IDEAS

TCP Window size - update default to 0 on platforms with auto tuning

Both the TSM server and TSM client has an option named TCPWINDOWSIZE that tunes the TCP window size.<br /><br />Most of us would expect that the default would be 0, ie go with the operating system default settings. This is not the case, as the TCPWINDOWSIZE tunable defaults to a (low) value. While it was once introduced as a workaround for too low OS defaults, nowadays it is in itself limiting the client performance.
<br /><br />The problem is that the default once decided is today pathetically low, and since the implementation of TCP window auto tuning in the most common operating system it's even more detrimental to long-haul TSM performance.<br /><br />My suggestion is to change the default TCPWINDOWSIZE to 0 on both client and server, for all platforms. This would be the least surprising default, and would work out of the box for all OS:es with TCP auto tuning or with decent tuning/defaults.<br /><br />At the very least, it should be changed to 0 on all operating systems that employs auto tuning (Linux, Windows, MacOS, probably more).

Idea priority High
  • Guest
    Reply
    |     Nov 18, 2020

    This is available in Spectrum Protect 8.1.11.

  • Guest
    Reply
    |     Nov 11, 2020

    Hi,

    I am working as a Customer Success Manager for this customer and I would like to hear why this case still OPEN since 2013 and but the customer has not received any feedback yet.

    Oguz Mehli
    Customer Success Manager - Nordics
    oguz.mehli@ibm.com

  • Guest
    Reply
    |     Jun 12, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Storage
    Product - Tivoli Storage Manager (TSM) Family

    For recording keeping, the previous attributes were:
    Brand - Tivoli
    Product family - Storage
    Product - Tivoli Storage Manager (TSM) Family

  • Guest
    Reply
    |     Jul 2, 2014

    Thank you for submitting this request. This is consistent with our current product direction and is being targeted for a release. This is not a statement of commitment as intent and plans are subject to change. We will provide an update to the request should plans change or the enhancement is delivered. We sincerely appreciate your commitment to IBM Tivoli Storage Manager and support in moving the product forward.

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