I am running some comparison tests (ignite vs cassandra) to check how to improve the performance of 'get' operation. The data is fairly straightforward. A simple Employee Object(10 odd fields), being stored as BinaryObject in the cache as
IgniteCache<String, BinaryObject> empCache; The cache is configured with, Write Sync Mode - FULL_SYNC, Atomicity - TRANSACTIONAL, Backup - 1 & Persistence - Enabled Cluster config, 3 server + 1 client node. Setup on 2 machine, server machine (Intel(R) Xeon(R) CPU X5675 @ 3.07GHz) & client machine (Intel(R) Xeon(R) CPU X5560 @ 2.80GHz). Client has multiple threads(configurable) making concurrent 'get' calls. Using 'get' on purpose due to use case requirements. For about 500k request, i am getting a throughput of about 1500/sec. Given all of the data is in off-heap with cache hits percentage = 100%. Interestingly with Cassandra i am getting a similar performance, with key Cache and limited row cache. I've tried running with 10/20/30 threads, the performance is more/less same. Letting the defaults for most of the Data configuration. For this test i turned the persistence off. Ideally for get's it shouldn't really matter. The performance is the same. ============================================ Data Regions Configured: [19:35:58] ^-- default [initSize=256.0 MiB, maxSize=14.1 GiB, persistence=false] Topology snapshot [ver=4, locNode=038f99b3, servers=3, clients=1, state=ACTIVE, CPUs=40, offheap=42.0GB, heap=63.0GB] ============================================ Additionally ran top on both the machines to check if they are hitting the resources, ------ Server PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 14159 root 20 0 29.7g 3.2g 15216 S 10.3 4.5 1:35.69 java 14565 root 20 0 29.4g 2.9g 15224 S 8.3 4.2 1:33.41 java 13770 root 20 0 30.0g 2.9g 15184 S 6.3 4.2 1:36.99 java ----- Client 3731 root 20 0 27.8g 1.1g 15304 S 136.5 1.5 2:39.16 java As you can see everything is well under. Frankly, i was expecting Ignite gets to be pretty fast, given all data is in cache. Atleast looking at this test https://www.gridgain.com/resources/blog/apacher-ignitetm-and-apacher-cassandratm-benchmarks-power-in-memory-computing <https://www.gridgain.com/resources/blog/apacher-ignitetm-and-apacher-cassandratm-benchmarks-power-in-memory-computing> Planning to run one more test tomorrow with no-persistence and setting near cache (on heap) to see if it helps. Let me know if you guys see any obvious configurations that should be set. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
