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Add DWPD (Drive Writes Per Day) rate limiting to control L2ARC write speeds and protect SSD endurance. Write rate is constrained by the minimum of l2arc_write_max and DWPD-calculated budget. Devices accumulate unused write budget over 24-hour periods with automatic reset and carry-over. Writes occur in controlled bursts (max 50MB) with adaptive intervals to achieve target rates. Applies after initial device fill. Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ameer Hamza <ahamza@ixsystems.com> Closes #18093 |
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