Best cheap non-volatile ZIL options

gpw928

gpw928

Hi,

The collected wisdom of this thread seems to be that the ZFS Intent Log (ZIL) requires:
  • low latency;
  • modest capacity (~50% of main memory, so 16 GB); and
  • non-volatile storage (battery or capacitor backed).
I get the impression that it's probably best that it's not partitioned and used for other things (i.e. better if it's dedicated to just the ZIL).

What are the current recommendations for the most cost-effective way to achieve this?

Thanks,
 
xibo said:
The Intel 313 SSDs should do the work quite well, and they're quite inexpensive.
Click to expand...

Hi @xibo,

Thanks for that. I have spent an evening with Google, but am none the wiser.

I have a Samsung 840 Pro which is being used as a cache, but I have not been able to convince myself that it's non-volatile in the face of sudden power loss. So I have not used it for the ZIL.

Is the SLC NAND technology of the Intel 313 SSD immune to data loss if the power drops?

Cheers,
 
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