Adicionar Criar zpool com ZIL e CACHE

Criar-zpool-com-ZIL-e-CACHE.md

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+Add cache and log to an existing pool
+If you have a pool without cache and log you can still add both, or just one of them, at any time.
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+For example, let’s assume you got a good enterprise SSD with power-loss protection that you want to use for improving the overall performance of your pool.
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+As the maximum size of a log device should be about half the size of the installed physical memory, it means that the ZIL will most likely only take up a relatively small part of the SSD, the remaining space can be used as cache.
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+First you have to create two GPT partitions on the SSD with parted or gdisk.
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+Then you’re ready to add them to a pool:
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+Add both, a separate log device and a second-level cache, to an existing pool
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+` zpool add -f <pool> log <device-part1> cache <device-part2>`
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+Just replace , and with the pool name and the two /dev/disk/by-id/ paths to the partitions.
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+You can also add ZIL and cache separately.
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+Add a log device to an existing ZFS pool
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+`zpool add <pool> log <log-device>`