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| 1 | +--- |
| 2 | +title: Redis Baseline Testing on Google Axion C4A Arm Virtual Machine |
| 3 | +weight: 5 |
| 4 | + |
| 5 | +### FIXED, DO NOT MODIFY |
| 6 | +layout: learningpathall |
| 7 | +--- |
| 8 | + |
| 9 | +## Redis Baseline Testing on GCP SUSE VMs |
| 10 | +This section performs baseline testing for Redis running on a GCP SUSE Arm64 VM, focusing on data insertion, retrieval, and search performance. |
| 11 | + |
| 12 | +### Prerequisites |
| 13 | +This command launches the Redis server process in the background. It allows you to run subsequent commands in the same terminal session while Redis continues running. |
| 14 | +Start the Redis service in the background: |
| 15 | + |
| 16 | +```console |
| 17 | +redis-server & |
| 18 | +``` |
| 19 | + |
| 20 | +**Check if Redis is active and responding to commands:** |
| 21 | + |
| 22 | +The redis-cli ping command sends a simple health check request to the Redis server. A PONG response confirms that the server is running correctly and the client can communicate with it. |
| 23 | +```console |
| 24 | +redis-cli ping |
| 25 | +``` |
| 26 | + |
| 27 | +output: |
| 28 | + |
| 29 | +```output |
| 30 | +PONG |
| 31 | +``` |
| 32 | + |
| 33 | +### Insert Sample Data |
| 34 | +These steps populate the Redis database with a sample dataset to validate insertion performance and data persistence. You will create 10,000 key-value pairs using a simple shell loop and verify that the data has been successfully stored. |
| 35 | + |
| 36 | +Use `redis-cli` to insert **10,000 sample key-value pairs**: |
| 37 | +```console |
| 38 | +for i in $(seq 1 10000); do |
| 39 | + redis-cli SET key:$i "value-$i" > /dev/null |
| 40 | +done |
| 41 | +``` |
| 42 | +- This command iterates through numbers **1 to 10,000**, setting each as a Redis key in the format `key:<number>` with the corresponding value `"value-<number>"`. |
| 43 | +- The `> /dev/null` part suppresses command output to make the insertion process cleaner and faster. |
| 44 | + |
| 45 | +**Verify Data Storage Count:** |
| 46 | + |
| 47 | +The `DBSIZE` command returns the total number of keys currently stored in the Redis database. |
| 48 | + |
| 49 | +```console |
| 50 | +redis-cli DBSIZE |
| 51 | +``` |
| 52 | + |
| 53 | +```output |
| 54 | +(integer) 10000 |
| 55 | +``` |
| 56 | +Seeing `(integer) 10000` confirms that all key-value pairs were inserted successfully. |
| 57 | + |
| 58 | +**Verify Sample Data Retrieval** |
| 59 | + |
| 60 | +Fetch one of the inserted keys to confirm data correctness: |
| 61 | + |
| 62 | +```console |
| 63 | +redis-cli GET key:5000 |
| 64 | +``` |
| 65 | +- The `GET` command retrieves the value of a given key. |
| 66 | +- If Redis returns `"value-5000"`, it confirms that data insertion worked properly and the database is responding as expected. |
| 67 | + |
| 68 | +You should see an output similar to: |
| 69 | + |
| 70 | +```output |
| 71 | +"value-5000" |
| 72 | +``` |
| 73 | + |
| 74 | +### Perform Basic Data Search Tests |
| 75 | +This step verifies Redis’s ability to retrieve specific data efficiently using unique keys. The `GET` command fetches the value associated with a given key from Redis. |
| 76 | + |
| 77 | +You can test this by retrieving a known key-value pair: |
| 78 | + |
| 79 | +```console |
| 80 | +redis-cli GET key:1234 |
| 81 | +``` |
| 82 | + |
| 83 | +You should see an output similar to: |
| 84 | + |
| 85 | +```output |
| 86 | +"value-1234" |
| 87 | +``` |
| 88 | +This confirms that Redis is storing and retrieving data correctly from memory. |
| 89 | + |
| 90 | +### Search for Multiple Keys Using Pattern Matching |
| 91 | +This test demonstrates how Redis can locate multiple keys that match a pattern, useful for exploratory queries or debugging. |
| 92 | + |
| 93 | +Use the `KEYS` command to search for keys matching a pattern: |
| 94 | + |
| 95 | +```console |
| 96 | +redis-cli KEYS "key:1*" |
| 97 | +``` |
| 98 | +`KEYS` is fast but **blocks the server** when handling large datasets, so it’s not recommended in production. |
| 99 | + |
| 100 | +You should see an output similar to: |
| 101 | + |
| 102 | +```output |
| 103 | + 1) "key:1392" |
| 104 | + 2) "key:1076" |
| 105 | + 3) "key:1683" |
| 106 | + 4) "key:1490" |
| 107 | + 5) "key:117" |
| 108 | + 6) "key:1293" |
| 109 | + 7) "key:1791" |
| 110 | + 8) "key:1891" |
| 111 | + 9) "key:1543" |
| 112 | +.......... |
| 113 | +``` |
| 114 | + |
| 115 | +### Production-Safe Searching with SCAN |
| 116 | +This step introduces a production-friendly method for iterating through keys without blocking Redis operations. |
| 117 | + |
| 118 | +Use the `SCAN` command for larger datasets — it is non-blocking and iterates safely. |
| 119 | + |
| 120 | +```console |
| 121 | +redis-cli SCAN 0 MATCH "key:1*" COUNT 100 |
| 122 | +``` |
| 123 | + |
| 124 | +You should see an output similar to: |
| 125 | + |
| 126 | +```output |
| 127 | +1) "9792" |
| 128 | +2) 1) "key:151" |
| 129 | + 2) "key:1845" |
| 130 | + 3) "key:1397" |
| 131 | + 4) "key:1501" |
| 132 | + 5) "key:1994" |
| 133 | + 6) "key:1475" |
| 134 | + 7) "key:1522" |
| 135 | + 8) "key:1884" |
| 136 | +``` |
| 137 | +Redis will return a cursor value (for example, `9792`). |
| 138 | +Continue scanning by reusing the cursor until it returns `0`, meaning the iteration is complete. |
| 139 | + |
| 140 | +### Measure Data Retrieval Performance |
| 141 | +This step measures how quickly Redis can retrieve a single key from memory, helping to establish a baseline for data access latency on the Arm-based VM. |
| 142 | + |
| 143 | +**Time Single Key Lookup**: Redis operations are extremely fast since data is stored in-memory. To quantify this, the Unix `time` command is used to measure the latency of retrieving a single key using `redis-cli`. |
| 144 | + |
| 145 | +```console |
| 146 | +(time redis-cli GET key:9000) 2>&1 |
| 147 | +``` |
| 148 | + |
| 149 | +This command measures three time metrics: |
| 150 | + |
| 151 | +- **real** – Total elapsed time (wall-clock time) |
| 152 | +- **user** – Time spent in user mode |
| 153 | +- **sys** – Time spent in kernel mode |
| 154 | + |
| 155 | +You should see an output similar to: |
| 156 | + |
| 157 | +```output |
| 158 | +"value-9000" |
| 159 | +
|
| 160 | +real 0m0.002s |
| 161 | +user 0m0.002s |
| 162 | +sys 0m0.000s |
| 163 | +``` |
| 164 | +These results show that Redis retrieves data almost instantly (in milliseconds or microseconds), confirming that the instance is performing efficiently under baseline conditions. |
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