After Bluefin upgrade, iSCSI share speed drops after 2GB copied

sretalla

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I guess a point that has been raised a lot recently in a few other threads is that iX invested a lot of time writing code for the iSCSI service used in CORE, but have done no such optimization for SCALE, hence recommend that iSCSI workloads should be serviced by CORE at this time (and the near future).

The question would be, "why are you trying to get peak performance out of something that's not at all optimized for performance?".

You've already proven it's nothing to do with the hardware (although we have identified a lot of sub-optimal points about how you are/were set up).

It should be clear that all writes with iSCSI will be sync, unless you set the ZVOL to sync=disabled. (taking risks of corruption on unexpected disconnect)

SMB writes may be async (dpending on the client).

Why wouldn't you use CORE for your VM instead if iSCSI is the purpose?
 
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