Difference between revisions of "ZFS on high latency devices"

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if SW dominates, get a SLOG or fix your workload
if SW dominates, get a SLOG or fix your workload


if AR dominates, consider decreasing AR threads or the total max threads, or rate limit zfs send
if AR dominates, consider decreasing AR max threads or the total max threads, or rate limit zfs send
 
if both AR and AW get choked back, increase vdev max
 
if AW gets choked back under peak IO, increase AW min threads.  just a bit.


if RMW during txg commit is too slow or aggressive, adjust zfs_sync_taskq_batch_pct
if RMW during txg commit is too slow or aggressive, adjust zfs_sync_taskq_batch_pct
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