Hi,
as it turns out to be pretty difficult (or expensive), to find high
performance dedicated ZIL devices, I had another thought:
If using a RAID controller with a large cache, eg. 4GB and battery
backup in JBOD mode and using on disk ZIL – wouldn't the controller
cache work as a great ZIL accelerator, requiring no dedicated ZIL?
If my understanding is correct, a battery backed RAID controller will
ignore cache flush commands and thus the controller cache would be a
very low latency intermediate cache wich is preserved over power failure.
Best Regards,
Felix Buenemann
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