CommVault Forums

Solving Forward - Solving Together
Welcome to CommVault Forums Sign in | Join | Help
in

Number of data streams

Last post 03-07-2012, 3:49 PM by Vincenzo_Basolino. 5 replies.
Sort Posts: Previous Next
  • Number of data streams
    Posted: 03-07-2012, 11:22 AM

    How do you determine how many data streams you have availabe to you? I have 2 media servers both are fiber channel connected to my SAN with 4 Fiber ports each. My understanding is that each port is dual streamed (?) thus giving me 16 maximum data streams at any one time. I cannot find anything that would confirm or deny this and could really use some help trying to determine how many actual streams I have availabe.

  • Re: Number of data streams
    Posted: 03-07-2012, 2:44 PM

    Start with stream 2x the number of spindles in the mountpath(s)

  • Re: Number of data streams
    Posted: 03-07-2012, 3:04 PM

    From the sending side, or the receiving side?

    What do you mean by spindles? if from the receiving side, these are luns that are multiple disks used to create that lun.

  • Re: Number of data streams
    Posted: 03-07-2012, 3:12 PM

    So if the lun has 5 disks i would set the streams to 10 at first.  From there you can run some performance testing to see if going higher nets any different results.  You could also test 5 to see if any performance difference is experienced. 

  • Re: Number of data streams
    Posted: 03-07-2012, 3:43 PM

    I will test those settings and see if it improves it any. The issue I am having is I have 2 VSA (VM) sub-clients, a full backup on one takes 16-18 hours, the other over 24 hours to complete. I am looking at readers vs streams to see if I can improve this any.

    Thank you for your help so far.

  • Re: Number of data streams
    Posted: 03-07-2012, 3:49 PM

    each reader is a VM.  So if 10 readers are set and there are 10 streams, 10 VMs get backed up in parallel.

The content of the forums, threads and posts reflects the thoughts and opinions of each author, and does not represent the thoughts, opinions, plans or strategies of CommVault Systems, Inc. ("CommVault") and CommVault undertakes no obligation to update, correct or modify any statements made in this forum. Any and all third party links, statements, comments, or feedback posted to, or otherwise provided by this forum, thread or post are not affiliated with, nor endorsed by, CommVault.
CommVault, CommVault and logo, the “CV” logo, CommVault Systems, Solving Forward, SIM, Singular Information Management, Simpana, CommVault Galaxy, Unified Data Management, QiNetix, Quick Recovery, QR, CommNet, GridStor, Vault Tracker, InnerVault, QuickSnap, QSnap, Recovery Director, CommServe, CommCell, SnapProtect, ROMS, and CommValue, are trademarks or registered trademarks of CommVault Systems, Inc. All other third party brands, products, service names, trademarks, or registered service marks are the property of and used to identify the products or services of their respective owners. All specifications are subject to change without notice.
Close
Copyright © 2014 CommVault | All Rights Reserved. | Legal | Privacy Policy