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Nx Server, failover and storage

Answered
Julien ROMANO

Hello Nx Lovers,

I don't get completely how failover on storage works

I've 2 servers, one is a failover.

If main server is offline, second take correctly cameras.

But about storage ? If main is offline, failover server is online but we don't get previous record.

Have we to create a common shared folder (on NAS) with realtime backup on both servers ? Can we do it directly between Nx server (with enough storage) ?

 

Regards

 

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Comments

2 comments

Date Votes
  • Anderson Chang
    • Network Optix team

    Hi Julien ROMANO,

    Currently, the Nx Server does not support cross-server storage backup.
    The video archive could only be stored and accessed by the Nx Server which mounts the backup storage volume.

    Let assume the two of your servers are named Server 1 and Server 2, and Volume 1 and Volume 2 are their storage volume accordingly.
    When Server 1 is offline and Server 2 takes over the camera, the new recording will be stored on Volume 2.
    Since Volume 1 is not mounted on Server 2, you are not able to get the video archive on Volume 1.

    If you want to access the video archive (previous recording) on the storage volume of the offline server, the best option is to get the server back online.
    For the situation that server could not get online in a short period, there are two additional options:
    A. Access the storage volume directly.
    Go to the storage volume, then go to the hi_quality or low_quality folder as you desired.
    The video archive is stored by the path as:

    <camera mac>/<year>/<month>/<date>/<hour>

    The archive file is named by the combination of the start and end time in the EPOCH.

    B. Mount the storage volume to the online server
    If possible, you could mount the storage volume to one of the online servers, set it as the backup volume, then do the backup reindex.
    After the reindex finishes, you should be able to view the archive on the Nx Client software.
    However, please note that the reindex may take some time, depending on the size and usage of the storage volume.
    Also, if there are backup storage is set on the online server, this will make the server perform the reindex on that volume as well, it may be an unnecessary task.

     

    Have we to create a common shared folder (on NAS) with realtime backup on both servers ?

    Mounting the same storage volume on multiple servers may cause other unexpected issues.
    One of the possible issues is though the bandwidth between the storage and servers may not be exceeded, the accessing requests from the servers may overwhelm the I/O limitation, making the storage become not able to respond in time.

     

    Thank you.

    1
  • Julien ROMANO

    Lovely !

    Thank you very much

     

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