Hello Developers, I originally posted this message to cassandra-u...@incubator.apache.org and want to find my tests are ok or not. I did this tests after seeing Jonathan's blog(http://spyced.blogspot.com/) and I used same stress.py to do tests.
H/W: Single node, Quad Core(8 cores), 8GB RAM: Two separate physical disks, one for the commit log and another for the data. cassandra version : 0.5 storage-conf.xml ================ <KeysCachedFraction>0.4</KeysCachedFraction> <CommitLogRotationThresholdInMB>256</CommitLogRotationThresholdInMB> <MemtableSizeInMB>128</MemtableSizeInMB> <MemtableObjectCountInMillions>0.2</MemtableObjectCountInMillions> <MemtableFlushAfterMinutes>1440</MemtableFlushAfterMinutes> <ConcurrentReads>16</ConcurrentReads> Data Model: <ColumnFamily CompareWith="BytesType" Name="Standard1"/> /home/sun>python stress.py -n 100000 -t 100 -c 600 -r -o insert -i 10 ........ 83779,297,0.334478345002,290 86736,295,0.335617337551,300 89621,288,0.337104303915,310 92578,295,0.343658989251,320 95567,298,0.331744175047,330 98515,294,0.291284884979,340 100000,148,0.166682253301,350 This test can be ignored, since nobody will insert 600 keys at a time. /home/sun>python stress.py -n 100000 -t 100 -c 25 -r -o read -i 10 WARNING: multiprocessing not present, threading will be used. Benchmark may not be accurate! total,interval_op_rate,avg_latency,elapsed_time 19828,1982,0.0514599678015,10 40797,2096,0.0473390288764,20 59350,1855,0.0532040532783,30 76317,1696,0.0598703045355,40 100000,2368,0.0332285839526,50 After this I tried with 1 million keys: Data size on disk : ~ 30G /home/sun>python stress.py -n 1000000 -t 100 -c 25 -r -o read -i 10 WARNING: multiprocessing not present, threading will be used. Benchmark may not be accurate! total,interval_op_rate,avg_latency,elapsed_time ....................... ....................... 87916,76,1.30730833113,1240 88665,74,1.33158908508,1250 89405,74,1.35333179654,1260 90086,68,1.45503252228,1270 90745,65,1.51978417774,1280 91476,73,1.38719448671,1290 92226,75,1.3288515962,1300 92976,75,1.33220300897,1310 93770,79,1.26187492288,1320 94557,78,1.26394684554,1330 thanks, -Aita