added support for hexists (#195)

Author: slice4e

redis_benchmarks_specification/test-suites/memtier_benchmark-1Mkeys-hash-hexists.yml

@@ -0,0 +1,33 @@
+version: 0.4
+name: memtier_benchmark-1Mkeys-lhash-hexists
+description: Runs memtier_benchmark, for a keyspace length of 1M keys loading HASHES with 5 fields each. Each field value has a data size of 100 Bytes. After loading test HEXISTS command. 
+dbconfig:
+  configuration-parameters:
+    save: '""'
+  check:
+    keyspacelen: 1000000
+  preload_tool:
+    run_image: redislabs/memtier_benchmark:edge
+    tool: memtier_benchmark
+    arguments: '"--data-size" "100" --command "HSET __key__ field1 __data__ field2 __data__ field3 __data__ field4 __data__ field5 __data__" --command-key-pattern="P" --key-minimum=1 --key-maximum 10000000 -n 5000 -c 50 -t 4 --hide-histogram'
+  resources:
+    requests:
+      memory: 1g
+tested-groups:
+- hash
+tested-commands:
+- hexists
+redis-topologies:
+- oss-standalone
+build-variants:
+- gcc:8.5.0-amd64-debian-buster-default
+clientconfig:
+  run_image: redislabs/memtier_benchmark:edge
+  tool: memtier_benchmark
+  arguments: --test-time 180 --command "HEXISTS __key__ field1" --command-key-pattern="R" --command "HEXISTS __key__ field3" --command-key-pattern="R"  --command "HEXISTS __key__ field_NO" --command-key-pattern="R" --key-minimum=1 --key-maximum 1000000 -c 4 -t 4 --hide-histogram
+  resources:
+    requests:
+      cpus: '4'
+      memory: 2g
+
+priority: 100