Mountpath properties - Number of writers

Last post 11-12-2018, 1:29 AM by CharlesC. 4 replies.
Sort Posts: Previous Next
  • Mountpath properties - Number of writers
    Posted: 11-02-2018, 4:09 AM

    Hi All, 

    I am running CV V11 SP12 and have 4 media agents each hosting 8 x 10Tb mount paths. In the Mount Path properties the Mount Path Allocation Policy is set to "Allocate number of Writers = 10 rather than "Maximum Allowed Writers". Is this best practise? What factor(s) determine what this policy is set to?.

  • Re: Mountpath properties - Number of writers
    Posted: 11-06-2018, 9:41 AM

    Beste practice is to look at the amount of disks for a mount path, this amount equals the amount of writers for that mount path.


    Jos Meijer
    Senior Technical Consultant
  • Re: Mountpath properties - Number of writers
    Posted: 11-08-2018, 3:36 PM

    Hi CharlesC

    Adding to Josh's advice, Mount Path configuration and volume sizing is definitely important to determine the maximum amount of writers. 

    From an infrastructure point-of-view, it is also important depending on the following:

    • SAN Based Storage (FC or ISCSI) -> 
      • if it is FC the bandwidth allocation over the Fabric might not be of concern as in most cases it won't be over saturated
      • if it is ISCSI, this will be utilizing network, so you will need to be mindful of the network bandwidth and ensure it doesnt impact other operations within th environemt
    • NAS (pure network) ->
      • same as ISCSI, this will be utilizitng network, so you will need to be mindful of the network bandwidth and ensure it doesnt impact other operations within th environemt
    • ScaleOut Node ->
      • Scaleout Storage, which distributes data at Node level could have potential Node level CPU utilization consideration, so running with maximum streams might not be appropriate. 
     
    The above are some high-level consideration that will depend on the environment setup and will be a key area, when managing Disk Library and utilization. 
     
    Hopefully that helps 
     
    Thank you 
     
    Winston 
  • Re: Mountpath properties - Number of writers
    Posted: 11-12-2018, 1:29 AM

    Thanks for the reply Winston & Jos. Storage is SAN based over FC and from the number of disks involved, 10mwriters per mount point does appear to be about right.

  • Re: Mountpath properties - Number of writers
    Posted: 11-12-2018, 1:29 AM

    Thanks for the reply Winston & Jos. Storage is SAN based over FC and from the number of disks involved, 10 writers per mount point does appear to be about right.

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 © 2019 Commvault | All Rights Reserved. | Legal | Privacy Policy