Cache and Log for synmirror?

[JBK]

I am building a server ONLY to sync smaller production server(s) to it (in datasets) nightly as a quick DR. It has 64gig ram.

Will adding Log/Cache vdevs make any difference in performance? Or is it just a waste of time and money?

 

[sretalla]

Log unlikely unless your backup client is asking for sync writes.

L2ARC in metadata only mode may be helpful if there's a higher number of files in the backups (although if the backups themselves are some kind of archive format, then maybe not so much).

Be sure to optimize your recordsize for the dataset that's taking the backups.

 

[JBK]

Very good info, thank you. Skipping the log as there are no sync writes, just trickle in data.