Hi, NFS on zfs can be quite a pain with large number of small files. After playing around it, I discovered this zfs_nocacheflush flag bringing me back to high performances on NFS. Questions: - How much unsafe is this? - How can I check zfs caching status, to understand really what is staying on the cache and for how long? - Are we talking about long term cache or fractions of second sync? - Is there a sync tool to force zfs cache flush? - Is there a way to set this flag on a per-pool basis, or on a per-dataset basis? (I may want to enable this only on NFS shares). Thanx for any help. Gabriele.
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