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Status Planned for future release
Workspace Storage Protect Family
Categories Spectrum Protect (Server)
Created by Guest
Created on Apr 2, 2013

RELATED IDEAS

Improve TSM Replication over high latency WAN links

I would like a TSM server option that would allow TSM to use as many parallel TCP connections as possible in order to maximize throughput along a Long Fat Pipe (WAN link w/ >60ms latency between TSM servers). Alternatively, I would like the TSM servers to utilize an alternate protocol rather than TCP that will improve throughput speeds during replication.

Idea priority Urgent
  • Guest
    Reply
    |     Sep 10, 2018

    At SP 8.1.5, on AIX, we use large tcp buffers at the OS side, and large numbers of replication sessions.

    We use TCPWIN 0 on the servers, 1 meg for tcp_sendspace and tcp_recvspace at the OS side (maximum no value), and 4 megs on the adapters (going larger caused slower, and erratic transfer rates).

    On a 3000 mile link, 168ms round trip, 10gbit link, we are able to get 95MB/sec/session, or 650MB/sec aggregate at the OS.

    The limit of one session per filespace is still in SP, but when we use REPL NOD VM* MAXSESS=99 and a second REPL NODE * MAXSESS=99, we get over 160 sessions. We're able to get in the 470MB/sec range.

  • 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
    |     May 30, 2013

    Thank you for submitting the request. There are multiple improvement items we are evaluating to improve the performance of TSM node replication and parallel TCP connections is one of the options for implementation.

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