[zfs-discuss] ZiL performance

Ali Hamid itsanstorage at gmail.com
Mon Apr 16 08:08:04 EDT 2018


Hi,

friends, i search in about how use slog in long term without decrease
performance, I find :
"
To ensure maximum ZIL performance on NAND flash SSD-based SLOG devices, you
should also overprovison spare area to increase IOPS[3]. You can do this
with a mix of a secure erase and a partition table trick, such as the
following:

    Run a secure erase on the NAND-flash SSD.
    Create a partition table on the NAND-flash SSD.
    Create a 4GB partition.
    Give the partition to ZFS to use as a log device.

If using the secure erase and partition table trick, do not use the
unpartitioned space for other things, even temporarily. That will reduce or
eliminate the overprovisioning by marking pages as dirty.
"

can you help me for "Run a secure erase on the NAND-flash SSD."?

very thanks
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