diff --git a/Criar-zpool-com-ZIL-e-CACHE.md b/Criar-zpool-com-ZIL-e-CACHE.md
new file mode 100644
index 0000000..afd1b9f
--- /dev/null
+++ b/Criar-zpool-com-ZIL-e-CACHE.md
@@ -0,0 +1,22 @@
+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.
+
+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.
+
+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.
+
+First you have to create two GPT partitions on the SSD with parted or gdisk.
+
+Then you’re ready to add them to a pool:
+
+Add both, a separate log device and a second-level cache, to an existing pool
+
+` zpool add -f <pool> log <device-part1> cache <device-part2>`
+
+Just replace , and with the pool name and the two /dev/disk/by-id/ paths to the partitions.
+
+You can also add ZIL and cache separately.
+
+Add a log device to an existing ZFS pool
+
+`zpool add <pool> log <log-device>`
\ No newline at end of file