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Thread: Speedup replication

  1. #1

    Default Speedup replication

    I'm using two Open-E NASR3 servers.
    Every night I replicate the data from NAS1 to NAS2, about 150GB data.
    This takes about 10 hours.

    I read something about the snapshot functionality, can I speedup replication by taking a snapshot every minute / 5 minutes and replicate that immediatly to NAS2?

    Thanks,
    Rudy

  2. #2

    Default

    Hey Rudy,

    Man 10 hrs is so long.. it should take less time!!! r u running other tasks in the same time?? did u enable the replicate files???

    And running snapshot every 5 minutes could kill your resources. schadual couple snapshots everyday and replicate them. Then run a full backup weekly. In this way you will not kill the system and your data will be safe...

  3. #3
    Join Date
    Mar 2008
    Location
    Germany
    Posts
    16

    Default

    Can you please provide more information about your HW configuration.

    Seems like any network card is bad, or you just you a too simple one. Try it with the Intel Pro network controller.

  4. #4

    Angry

    Sorry for the slow response..

    I'm using two of the following system:

    http://www.ahead-it.be/shop.asp?cat=storage&NR=STIS410

    Supermicro PDSMi+ ServerBoard
    - 2 x Intel PCI-e Gigabit LAN

    How did I setup replication:
    - one volume group 350GB with 64GB snaphot
    - create data replication backup method
    - source share 'data'
    - snapshot 'snap00000'
    - target share 'data'
    - Log replication errors: Yes
    - Replicate whole files: Yes

    My tasks list:
    2008-03-10 00:00:19
    nas1_to_nas2 Data replication OK Started

    2008-03-10 13:06:18
    snap00000 Snapshot OK Stopped

    2008-03-10 13:06:19
    nas1_to_nas2 Data replication OK Finished



    Files overal:
    8507781
    Files transfered:
    57280
    Preparing time:
    30715.97 sec
    Sent:
    6221.96 MB
    Transfer:
    0.13 MB/s


    No other tasks running, so I don't know what I'm doing wrong..

  5. #5

    Default

    Some more information:

    Replication is preformed on a separate nic.

    Load is also very low < 0.2

    Ram:
    Used memory (MB): 372.53
    System cache (MB): 1585.34
    Physical free memory (MB): 66.46

    Used swap size (MB): 44.10
    Free swap size (MB): 4051.89

    Network controllers
    Intel Corporation 82573E Gigabit Ethernet Controller (Copper) (rev 03)
    Intel Corporation 82573L Gigabit Ethernet Controller

    Network drivers:
    Ethernet Channel Bonding Driver, v3.1.1
    Intel(R) PRO/1000 Network Driver

  6. #6
    Join Date
    Mar 2008
    Location
    Germany
    Posts
    16

    Default

    Have you tried you iSCSI or NAS performance from one Host to the open-e System.

  7. #7

    Default

    I'm using this system in an production enviroment.
    Using open-e as a NAS doesn't give me any performance problems.

    Only the replication is taking a long time..

  8. #8
    Join Date
    Mar 2008
    Location
    Germany
    Posts
    16

    Default

    Hard to say whats the error here. What about your network envoriment. What switches u use between these 2 NAS. On the same switch?

  9. #9

    Default

    Quote Originally Posted by DSSpower
    Hard to say whats the error here. What about your network envoriment. What switches u use between these 2 NAS. On the same switch?
    I contacted support of open-e, they said I needed 'Volume replication', because I'm backing up a lot of small files. I need to update my NAS-R3 version first, but it's in a prodution enviroment, so I can't just update the version because of the downtime.. I'll try it soon..

    Thank you for your help.

  10. #10
    Join Date
    Mar 2008
    Location
    Germany
    Posts
    16

    Default

    Quote Originally Posted by rudy
    I contacted support of open-e, they said I needed 'Volume replication', because I'm backing up a lot of small files. I need to update my NAS-R3 version first, but it's in a prodution enviroment, so I can't just update the version because of the downtime.. I'll try it soon..

    Thank you for your help.
    Ok thanks for the info. I hope the performance get better with volume replication - cause if you have many small files FC will be the best choice. But thats right what support said - volume rep is much faster then nsync.

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