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The `SAVE` commands performs a **synchronous** save of the dataset producing a
_point in time_ snapshot of all the data inside the Redis instance, in the form
of an RDB file.
You almost never want to call `SAVE` in production environments where it will
block all the other clients.
Instead usually `BGSAVE` is used.
However in case of issues preventing Redis to create the background saving child
(for instance errors in the fork(2) system call), the `SAVE` command can be a
good last resort to perform the dump of the latest dataset.
Please refer to the [persistence documentation][tp] for detailed information.
[tp]: /topics/persistence
@return
@simple-string-reply: The commands returns OK on success.
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