René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Failed to test with YCSB","articleBody":"Hi,\r\n\r\nI tried to test QuickCached with YCSB but failed.\r\n\r\n#### Testbed\r\nOS: Ubuntu 18.04\r\nJDK: 8 or 11\r\nYCSB: 0.17.0 RC1 (https://github.com/brianfrankcooper/YCSB/tree/0.17.0-RC1)\r\nQuickCached: the master branch\r\nMemcached: 1.4.24 (https://memcached.org/downloads)\r\n\r\n#### Commands\r\n1. Start QuickCached (in QuickCached directory)\r\n`java -server -Dappname=QC1 -Xms16g -Xmx16g -jar dist/QuickCached-Server.jar -l 127.0.0.1 -p 11211`\r\n2. Load workload (in YCSB directory)\r\n`./bin/ycsb load memcached -P workloads/workloada -p memcached.hosts=127.0.0.1:11211 -p recordcount=10000 -p operationcount=10000 -threads 8`\r\n3. Run workload\r\n`./bin/ycsb run memcached -P workloads/workloada -p memcached.hosts=127.0.0.1:11211 -p recordcount=10000 -p operationcount=10000 -threads 8 -s`\r\n\r\n#### Problems\r\n1. When using multiple threads to run the workload, e.g. 8 threads, there seems to be a high probability of failing to shut down all the memcached clients, thus YCSB will run forever even if `maxexecutiontime` is configured. (Similar to https://github.com/brianfrankcooper/YCSB/issues/618#issuecomment-187948523)\r\n2. If YCSB successes to shut down all the memcached clients, there will be many ERRORs in UPDATE.\r\n\r\nHere are two situations where there will be no problems:\r\n1. Use Memcached server.\r\n2. Use QuickCached and run YCSB with one thread.\r\n\r\nCould you please help me to solve these problems?\r\n\r\nThanks,\r\nJiawei","author":{"url":"https://github.com/jiaweixiao","@type":"Person","name":"jiaweixiao"},"datePublished":"2022-01-01T06:41:08.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/7/QuickCached/issues/7"}