Re: Unnecessary healing in 3-node replication setup on reboot

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On Saturday 17 October 2015 04:15 AM, Lindsay Mathieson wrote:

On 17 October 2015 at 02:51, Vijay Bellur <vbellur@xxxxxxxxxx
<mailto:vbellur@xxxxxxxxxx>> wrote:

    You may also want to check sharding (currently in beta with 3.7)
    where large files are chunked to smaller fragments. With this
    scheme, self-healing (and rolling checksum computation thereby)
    happens only on those fragments that undergo changes when one of the
    nodes in a replicated set is offline. This has shown nice
    improvements in gluster's resource utilization during self-healing.



Does it effect read speed and random i/o? I guess that would depend on
the methodology used to calculate shard location for a given block.
Could be quite interesting on top of zfs, love to test.


Krutika has been working on several performance improvements for sharding and the results have been encouraging for virtual machine workloads.

Testing feedback would be very welcome!

Thanks,
Vijay



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