[zfs-discuss] ZiL performance

Gordan Bobic gordan.bobic at gmail.com
Mon Apr 16 08:11:45 EDT 2018


Google for "ata secure erase".

On Mon, Apr 16, 2018 at 1:08 PM, Ali Hamid via zfs-discuss <
zfs-discuss at list.zfsonlinux.org> wrote:

> 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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>
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