Adding upstream version 1.9.1.upstream/1.9.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/iredis/data/commands/msetnx.md b/iredis/data/commands/msetnx.md
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+Sets the given keys to their respective values. `MSETNX` will not perform any
+operation at all even if just a single key already exists.
+
+Because of this semantic `MSETNX` can be used in order to set different keys
+representing different fields of an unique logic object in a way that ensures
+that either all the fields or none at all are set.
+
+`MSETNX` is atomic, so all given keys are set at once. It is not possible for
+clients to see that some of the keys were updated while others are unchanged.
+
+@return
+
+@integer-reply, specifically:
+
+- `1` if the all the keys were set.
+- `0` if no key was set (at least one key already existed).
+
+@examples
+
+```cli
+MSETNX key1 "Hello" key2 "there"
+MSETNX key2 "new" key3 "world"
+MGET key1 key2 key3
+```