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Posted to commits@cassandra.apache.org by "J. Ryan Earl (JIRA)" <ji...@apache.org> on 2013/10/21 17:31:45 UTC
[jira] [Comment Edited] (CASSANDRA-6179) "Load" calculated in
"nodetool info" is strange/inaccurate in JBOD setups
[ https://issues.apache.org/jira/browse/CASSANDRA-6179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13800731#comment-13800731 ]
J. Ryan Earl edited comment on CASSANDRA-6179 at 10/21/13 3:31 PM:
-------------------------------------------------------------------
'nodetool cfstats' below:
{noformat}
[jre@cassandra5 ~]$ nodetool cfstats
Keyspace: system_traces
Read Count: 16
Read Latency: 1.5970625 ms.
Write Count: 5171
Write Latency: 0.06117172693869658 ms.
Pending Tasks: 0
Table: sessions
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 455
Memtable data size, bytes: 255170
Memtable switch count: 0
Read count: 8
Read latency, micros: 0.179 ms.
Write count: 158
Write latency, micros: 0.041 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: events
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 20000
Memtable data size, bytes: 1048576
Memtable switch count: 0
Read count: 8
Read latency, micros: 3.016 ms.
Write count: 5013
Write latency, micros: 0.062 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
----------------
Keyspace: VcellsPolishedData
Read Count: 0
Read Latency: NaN ms.
Write Count: 0
Write Latency: NaN ms.
Pending Tasks: 0
Table: vcells_polished_data
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
----------------
Keyspace: system
Read Count: 502538
Read Latency: 0.337618096541953 ms.
Write Count: 1063
Write Latency: 0.19078080903104422 ms.
Pending Tasks: 0
Table: NodeIdInfo
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: batchlog
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: hints
SSTable count: 1
Space used (live), bytes: 37070
Space used (total), bytes: 37766
SSTable Compression Ratio: 0.34898362817272827
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 1
Read count: 8
Read latency, micros: 0.199 ms.
Write count: 64
Write latency, micros: 0.064 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 336
Compacted partition minimum size, bytes: 88149
Compacted partition maximum size, bytes: 105778
Compacted partition mean size, bytes: 105778
Table: schema_columns
SSTable count: 2
Space used (live), bytes: 26224
Space used (total), bytes: 33885
SSTable Compression Ratio: 0.20573152682760049
Number of keys (estimate): 256
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 37
Read count: 221301
Read latency, micros: 0.347 ms.
Write count: 139
Write latency, micros: 0.288 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1320
Compacted partition minimum size, bytes: 1332
Compacted partition maximum size, bytes: 29521
Compacted partition mean size, bytes: 4895
Table: peer_events
SSTable count: 1
Space used (live), bytes: 5828
Space used (total), bytes: 5828
SSTable Compression Ratio: 0.3692434210526316
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 1
Read count: 0
Read latency, micros: NaN ms.
Write count: 37
Write latency, micros: 0.271 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 16
Compacted partition minimum size, bytes: 643
Compacted partition maximum size, bytes: 1109
Compacted partition mean size, bytes: 935
Table: paxos
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: schema_keyspaces
SSTable count: 2
Space used (live), bytes: 12311
Space used (total), bytes: 15857
SSTable Compression Ratio: 0.33088662790697676
Number of keys (estimate): 256
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 18
Read count: 2
Read latency, micros: 0.529 ms.
Write count: 91
Write latency, micros: 0.051 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1320
Compacted partition minimum size, bytes: 150
Compacted partition maximum size, bytes: 215
Compacted partition mean size, bytes: 213
Table: peers
SSTable count: 2
Space used (live), bytes: 36210
Space used (total), bytes: 37570
SSTable Compression Ratio: 0.39710715688810955
Number of keys (estimate): 256
Memtable cell count: 52
Memtable data size, bytes: 12737
Memtable switch count: 14
Read count: 6
Read latency, micros: 3.320 ms.
Write count: 269
Write latency, micros: 0.103 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1320
Compacted partition minimum size, bytes: 73
Compacted partition maximum size, bytes: 14237
Compacted partition mean size, bytes: 7161
Table: schema_triggers
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 1997
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 11
Read count: 130
Read latency, micros: 0.101 ms.
Write count: 36
Write latency, micros: 0.068 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: range_xfers
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: compactions_in_progress
SSTable count: 2
Space used (live), bytes: 10927
Space used (total), bytes: 44335
SSTable Compression Ratio: 0.9089015151515152
Number of keys (estimate): 256
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 220
Read count: 0
Read latency, micros: NaN ms.
Write count: 220
Write latency, micros: 0.262 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1312
Compacted partition minimum size, bytes: 30
Compacted partition maximum size, bytes: 310
Compacted partition mean size, bytes: 104
Table: local
SSTable count: 1
Space used (live), bytes: 11687
Space used (total), bytes: 14758
SSTable Compression Ratio: 0.46092184368737477
Number of keys (estimate): 128
Memtable cell count: 8
Memtable data size, bytes: 520
Memtable switch count: 28
Read count: 43
Read latency, micros: 5.012 ms.
Write count: 63
Write latency, micros: 0.300 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1296
Compacted partition minimum size, bytes: 11865
Compacted partition maximum size, bytes: 14237
Compacted partition mean size, bytes: 14237
Table: schema_columnfamilies
SSTable count: 1
Space used (live), bytes: 17411
Space used (total), bytes: 26387
SSTable Compression Ratio: 0.20519161754588222
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 42
Read count: 281047
Read latency, micros: 0.329 ms.
Write count: 144
Write latency, micros: 0.260 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1296
Compacted partition minimum size, bytes: 1598
Compacted partition maximum size, bytes: 24601
Compacted partition mean size, bytes: 6360
Table: IndexInfo
SSTable count: 1
Space used (live), bytes: 4732
Space used (total), bytes: 4732
SSTable Compression Ratio: 0.9322033898305084
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 1
Read latency, micros: 4.864 ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 16
Compacted partition minimum size, bytes: 51
Compacted partition maximum size, bytes: 60
Compacted partition mean size, bytes: 60
----------------
Keyspace: searchapi_dsp_approved_feed_vitalii
Read Count: 0
Read Latency: NaN ms.
Write Count: 573891
Write Latency: 0.033150019777274775 ms.
Pending Tasks: 0
Table: 20131009_203006_1381343406
SSTable count: 4
Space used (live), bytes: 1157275045
Space used (total), bytes: 1157416736
SSTable Compression Ratio: 0.35243424641349497
Number of keys (estimate): 574208
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 13
Read count: 0
Read latency, micros: NaN ms.
Write count: 573891
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 720328
Compacted partition minimum size, bytes: 1917
Compacted partition maximum size, bytes: 17084
Compacted partition mean size, bytes: 6085
----------------
Keyspace: searchapi_dsp_approved_feed_alpha
Read Count: 99067
Read Latency: 0.7340010699829409 ms.
Write Count: 3763071
Write Latency: 0.026836108858961205 ms.
Pending Tasks: 0
Table: 20131009_203006_1381343406
SSTable count: 22
SSTables in each level: [0, 0, 22, 0, 0, 0, 0, 0, 0]
Space used (live), bytes: 3623280554
Space used (total), bytes: 3624526506
SSTable Compression Ratio: 0.3556069099894895
Number of keys (estimate): 1794560
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 36
Read count: 81943
Read latency, micros: NaN ms.
Write count: 1793104
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 2349952
Compacted partition minimum size, bytes: 1917
Compacted partition maximum size, bytes: 17084
Compacted partition mean size, bytes: 6121
Table: 20130921_004042_1379716842
SSTable count: 5
Space used (live), bytes: 3892005641
Space used (total), bytes: 3892920405
SSTable Compression Ratio: 0.35255558750057353
Number of keys (estimate): 1970304
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 39
Read count: 17124
Read latency, micros: NaN ms.
Write count: 1969967
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 350
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 2465216
Compacted partition minimum size, bytes: 1917
Compacted partition maximum size, bytes: 17084
Compacted partition mean size, bytes: 6036
----------------
Keyspace: vastre
Read Count: 5535
Read Latency: 6.6911300813008125 ms.
Write Count: 2573884
Write Latency: 0.15226749806906606 ms.
Pending Tasks: 0
Table: inventory
SSTable count: 11
Space used (live), bytes: 6049990037
Space used (total), bytes: 6050134884
SSTable Compression Ratio: 0.35825903710088336
Number of keys (estimate): 5091584
Memtable cell count: 367999
Memtable data size, bytes: 20971520
Memtable switch count: 11
Read count: 5535
Read latency, micros: NaN ms.
Write count: 1286985
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 194
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 8590072
Compacted partition minimum size, bytes: 150
Compacted partition maximum size, bytes: 219342
Compacted partition mean size, bytes: 2453
Table (index): inventory.inventoryUID
SSTable count: 4
Space used (live), bytes: 325158555
Space used (total), bytes: 325542657
SSTable Compression Ratio: 0.5301921528572615
Number of keys (estimate): 2591488
Memtable cell count: 19653
Memtable data size, bytes: 1048576
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 1286899
Write latency, micros: 0.029 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 6365816
Compacted partition minimum size, bytes: 73
Compacted partition maximum size, bytes: 2816159
Compacted partition mean size, bytes: 139
----------------
Keyspace: TestVcellsPolishedData
Read Count: 168
Read Latency: 0.8543928571428571 ms.
Write Count: 753
Write Latency: 2.4579628154050464 ms.
Pending Tasks: 0
Table: test_vcells_polished_data
SSTable count: 4
Space used (live), bytes: 470222414
Space used (total), bytes: 470223694
SSTable Compression Ratio: 0.0
Number of keys (estimate): 53760
Memtable cell count: 30
Memtable data size, bytes: 110682
Memtable switch count: 9
Read count: 168
Read latency, micros: NaN ms.
Write count: 753
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 102088
Compacted partition minimum size, bytes: 3312
Compacted partition maximum size, bytes: 1629722
Compacted partition mean size, bytes: 16558
----------------
Keyspace: searchapi_dsp_approved_feed_test
Read Count: 154
Read Latency: 1.9904415584415585 ms.
Write Count: 644079
Write Latency: 0.025757469192443785 ms.
Pending Tasks: 0
Table: 20131011_182853_1381508933
SSTable count: 4
Space used (live), bytes: 1237696525
Space used (total), bytes: 1237836296
SSTable Compression Ratio: 0.35361982682795234
Number of keys (estimate): 613248
Memtable cell count: 31102
Memtable data size, bytes: 170821647
Memtable switch count: 13
Read count: 154
Read latency, micros: NaN ms.
Write count: 644079
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 769040
Compacted partition minimum size, bytes: 1917
Compacted partition maximum size, bytes: 17084
Compacted partition mean size, bytes: 6133
----------------
Keyspace: OpsCenter
Read Count: 1075487
Read Latency: 0.1405984033279807 ms.
Write Count: 14137149
Write Latency: 0.05747777009353159 ms.
Pending Tasks: 0
Table: settings
SSTable count: 1
Space used (live), bytes: 4732
Space used (total), bytes: 4732
SSTable Compression Ratio: 0.9629629629629629
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 16
Compacted partition minimum size, bytes: 51
Compacted partition maximum size, bytes: 60
Compacted partition mean size, bytes: 60
Table: rollups60
SSTable count: 2
Space used (live), bytes: 285712246
Space used (total), bytes: 285739623
SSTable Compression Ratio: 0.549293451388619
Number of keys (estimate): 1408
Memtable cell count: 3216865
Memtable data size, bytes: 26214400
Memtable switch count: 60
Read count: 887875
Read latency, micros: 0.150 ms.
Write count: 9892918
Write latency, micros: 0.038 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 6912
Compacted partition minimum size, bytes: 125
Compacted partition maximum size, bytes: 943127
Compacted partition mean size, bytes: 370808
Table: rollups7200
SSTable count: 1
Space used (live), bytes: 2796816
Space used (total), bytes: 2805285
SSTable Compression Ratio: 0.46836366183323996
Number of keys (estimate): 768
Memtable cell count: 26426
Memtable data size, bytes: 1048576
Memtable switch count: 10
Read count: 0
Read latency, micros: NaN ms.
Write count: 82660
Write latency, micros: 0.025 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 2096
Compacted partition minimum size, bytes: 311
Compacted partition maximum size, bytes: 11864
Compacted partition mean size, bytes: 8688
Table: rollups86400
SSTable count: 1
Space used (live), bytes: 295399
Space used (total), bytes: 299204
SSTable Compression Ratio: 0.4900703646819302
Number of keys (estimate): 768
Memtable cell count: 2328
Memtable data size, bytes: 1048576
Memtable switch count: 5
Read count: 0
Read latency, micros: NaN ms.
Write count: 6652
Write latency, micros: 0.018 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 2096
Compacted partition minimum size, bytes: 125
Compacted partition maximum size, bytes: 1109
Compacted partition mean size, bytes: 850
Table: pdps
SSTable count: 2
Space used (live), bytes: 29363
Space used (total), bytes: 31131
SSTable Compression Ratio: 0.2850374290599562
Number of keys (estimate): 256
Memtable cell count: 720944
Memtable data size, bytes: 58720256
Memtable switch count: 14
Read count: 0
Read latency, micros: NaN ms.
Write count: 2176704
Write latency, micros: 0.170 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1312
Compacted partition minimum size, bytes: 29522
Compacted partition maximum size, bytes: 35425
Compacted partition mean size, bytes: 35425
Table: events_timeline
SSTable count: 1
Space used (live), bytes: 6652
Space used (total), bytes: 6762
SSTable Compression Ratio: 0.6203007518796992
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 1
Read count: 0
Read latency, micros: NaN ms.
Write count: 1
Write latency, micros: 0.302 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1296
Compacted partition minimum size, bytes: 73
Compacted partition maximum size, bytes: 1109
Compacted partition mean size, bytes: 598
Table: rollups300
SSTable count: 4
Space used (live), bytes: 62838990
Space used (total), bytes: 62847005
SSTable Compression Ratio: 0.40016431824415366
Number of keys (estimate): 2304
Memtable cell count: 643177
Memtable data size, bytes: 10485760
Memtable switch count: 18
Read count: 177700
Read latency, micros: 0.060 ms.
Write count: 1978194
Write latency, micros: 0.032 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 8880
Compacted partition minimum size, bytes: 61
Compacted partition maximum size, bytes: 263210
Compacted partition mean size, bytes: 54206
Table: events
SSTable count: 4
Space used (live), bytes: 31275
Space used (total), bytes: 31391
SSTable Compression Ratio: 0.4495362218092923
Number of keys (estimate): 512
Memtable cell count: 6
Memtable data size, bytes: 1790
Memtable switch count: 4
Read count: 9912
Read latency, micros: 0.721 ms.
Write count: 20
Write latency, micros: 0.219 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 2632
Compacted partition minimum size, bytes: 180
Compacted partition maximum size, bytes: 446
Compacted partition mean size, bytes: 250
----------------
{noformat}
'nodetool info' taken within a few seconds:
{noformat}
[jre@cassandra5 ~]$ nodetool info
Token : (invoke with -T/--tokens to see all 256 tokens)
ID : 72680375-d5b8-49ae-a33b-b99fec3009d3
Gossip active : true
Thrift active : true
Native Transport active: true
Load : 15.63 GB
Generation No : 1381357639
Uptime (seconds) : 1011643
Heap Memory (MB) : 3723.10 / 11980.81
Data Center : Oakland
Rack : C7.10.11
Exceptions : 118
Key Cache : size 3380824 (bytes), capacity 536870912 (bytes), 2198265 hits, 2208066 requests, 0.981 recent hit rate, 7200 save period in seconds
Row Cache : size 17276702 (bytes), capacity 268435456 (bytes), 52996 hits, 55926 requests, NaN recent hit rate, 0 save period in seconds
{noformat}
was (Author: jre):
'nodetool cfstats' below:
{{noformat}}
[jre@cassandra5 ~]$ nodetool cfstats
Keyspace: system_traces
Read Count: 16
Read Latency: 1.5970625 ms.
Write Count: 5171
Write Latency: 0.06117172693869658 ms.
Pending Tasks: 0
Table: sessions
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 455
Memtable data size, bytes: 255170
Memtable switch count: 0
Read count: 8
Read latency, micros: 0.179 ms.
Write count: 158
Write latency, micros: 0.041 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: events
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 20000
Memtable data size, bytes: 1048576
Memtable switch count: 0
Read count: 8
Read latency, micros: 3.016 ms.
Write count: 5013
Write latency, micros: 0.062 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
----------------
Keyspace: VcellsPolishedData
Read Count: 0
Read Latency: NaN ms.
Write Count: 0
Write Latency: NaN ms.
Pending Tasks: 0
Table: vcells_polished_data
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
----------------
Keyspace: system
Read Count: 502538
Read Latency: 0.337618096541953 ms.
Write Count: 1063
Write Latency: 0.19078080903104422 ms.
Pending Tasks: 0
Table: NodeIdInfo
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: batchlog
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: hints
SSTable count: 1
Space used (live), bytes: 37070
Space used (total), bytes: 37766
SSTable Compression Ratio: 0.34898362817272827
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 1
Read count: 8
Read latency, micros: 0.199 ms.
Write count: 64
Write latency, micros: 0.064 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 336
Compacted partition minimum size, bytes: 88149
Compacted partition maximum size, bytes: 105778
Compacted partition mean size, bytes: 105778
Table: schema_columns
SSTable count: 2
Space used (live), bytes: 26224
Space used (total), bytes: 33885
SSTable Compression Ratio: 0.20573152682760049
Number of keys (estimate): 256
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 37
Read count: 221301
Read latency, micros: 0.347 ms.
Write count: 139
Write latency, micros: 0.288 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1320
Compacted partition minimum size, bytes: 1332
Compacted partition maximum size, bytes: 29521
Compacted partition mean size, bytes: 4895
Table: peer_events
SSTable count: 1
Space used (live), bytes: 5828
Space used (total), bytes: 5828
SSTable Compression Ratio: 0.3692434210526316
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 1
Read count: 0
Read latency, micros: NaN ms.
Write count: 37
Write latency, micros: 0.271 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 16
Compacted partition minimum size, bytes: 643
Compacted partition maximum size, bytes: 1109
Compacted partition mean size, bytes: 935
Table: paxos
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: schema_keyspaces
SSTable count: 2
Space used (live), bytes: 12311
Space used (total), bytes: 15857
SSTable Compression Ratio: 0.33088662790697676
Number of keys (estimate): 256
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 18
Read count: 2
Read latency, micros: 0.529 ms.
Write count: 91
Write latency, micros: 0.051 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1320
Compacted partition minimum size, bytes: 150
Compacted partition maximum size, bytes: 215
Compacted partition mean size, bytes: 213
Table: peers
SSTable count: 2
Space used (live), bytes: 36210
Space used (total), bytes: 37570
SSTable Compression Ratio: 0.39710715688810955
Number of keys (estimate): 256
Memtable cell count: 52
Memtable data size, bytes: 12737
Memtable switch count: 14
Read count: 6
Read latency, micros: 3.320 ms.
Write count: 269
Write latency, micros: 0.103 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1320
Compacted partition minimum size, bytes: 73
Compacted partition maximum size, bytes: 14237
Compacted partition mean size, bytes: 7161
Table: schema_triggers
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 1997
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 11
Read count: 130
Read latency, micros: 0.101 ms.
Write count: 36
Write latency, micros: 0.068 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: range_xfers
SSTable count: 0
Space used (live), bytes: 0
Space used (total), bytes: 0
SSTable Compression Ratio: 0.0
Number of keys (estimate): 0
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 0
Compacted partition minimum size, bytes: 0
Compacted partition maximum size, bytes: 0
Compacted partition mean size, bytes: 0
Table: compactions_in_progress
SSTable count: 2
Space used (live), bytes: 10927
Space used (total), bytes: 44335
SSTable Compression Ratio: 0.9089015151515152
Number of keys (estimate): 256
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 220
Read count: 0
Read latency, micros: NaN ms.
Write count: 220
Write latency, micros: 0.262 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1312
Compacted partition minimum size, bytes: 30
Compacted partition maximum size, bytes: 310
Compacted partition mean size, bytes: 104
Table: local
SSTable count: 1
Space used (live), bytes: 11687
Space used (total), bytes: 14758
SSTable Compression Ratio: 0.46092184368737477
Number of keys (estimate): 128
Memtable cell count: 8
Memtable data size, bytes: 520
Memtable switch count: 28
Read count: 43
Read latency, micros: 5.012 ms.
Write count: 63
Write latency, micros: 0.300 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1296
Compacted partition minimum size, bytes: 11865
Compacted partition maximum size, bytes: 14237
Compacted partition mean size, bytes: 14237
Table: schema_columnfamilies
SSTable count: 1
Space used (live), bytes: 17411
Space used (total), bytes: 26387
SSTable Compression Ratio: 0.20519161754588222
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 42
Read count: 281047
Read latency, micros: 0.329 ms.
Write count: 144
Write latency, micros: 0.260 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1296
Compacted partition minimum size, bytes: 1598
Compacted partition maximum size, bytes: 24601
Compacted partition mean size, bytes: 6360
Table: IndexInfo
SSTable count: 1
Space used (live), bytes: 4732
Space used (total), bytes: 4732
SSTable Compression Ratio: 0.9322033898305084
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 1
Read latency, micros: 4.864 ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 16
Compacted partition minimum size, bytes: 51
Compacted partition maximum size, bytes: 60
Compacted partition mean size, bytes: 60
----------------
Keyspace: searchapi_dsp_approved_feed_vitalii
Read Count: 0
Read Latency: NaN ms.
Write Count: 573891
Write Latency: 0.033150019777274775 ms.
Pending Tasks: 0
Table: 20131009_203006_1381343406
SSTable count: 4
Space used (live), bytes: 1157275045
Space used (total), bytes: 1157416736
SSTable Compression Ratio: 0.35243424641349497
Number of keys (estimate): 574208
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 13
Read count: 0
Read latency, micros: NaN ms.
Write count: 573891
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 720328
Compacted partition minimum size, bytes: 1917
Compacted partition maximum size, bytes: 17084
Compacted partition mean size, bytes: 6085
----------------
Keyspace: searchapi_dsp_approved_feed_alpha
Read Count: 99067
Read Latency: 0.7340010699829409 ms.
Write Count: 3763071
Write Latency: 0.026836108858961205 ms.
Pending Tasks: 0
Table: 20131009_203006_1381343406
SSTable count: 22
SSTables in each level: [0, 0, 22, 0, 0, 0, 0, 0, 0]
Space used (live), bytes: 3623280554
Space used (total), bytes: 3624526506
SSTable Compression Ratio: 0.3556069099894895
Number of keys (estimate): 1794560
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 36
Read count: 81943
Read latency, micros: NaN ms.
Write count: 1793104
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 2349952
Compacted partition minimum size, bytes: 1917
Compacted partition maximum size, bytes: 17084
Compacted partition mean size, bytes: 6121
Table: 20130921_004042_1379716842
SSTable count: 5
Space used (live), bytes: 3892005641
Space used (total), bytes: 3892920405
SSTable Compression Ratio: 0.35255558750057353
Number of keys (estimate): 1970304
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 39
Read count: 17124
Read latency, micros: NaN ms.
Write count: 1969967
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 350
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 2465216
Compacted partition minimum size, bytes: 1917
Compacted partition maximum size, bytes: 17084
Compacted partition mean size, bytes: 6036
----------------
Keyspace: vastre
Read Count: 5535
Read Latency: 6.6911300813008125 ms.
Write Count: 2573884
Write Latency: 0.15226749806906606 ms.
Pending Tasks: 0
Table: inventory
SSTable count: 11
Space used (live), bytes: 6049990037
Space used (total), bytes: 6050134884
SSTable Compression Ratio: 0.35825903710088336
Number of keys (estimate): 5091584
Memtable cell count: 367999
Memtable data size, bytes: 20971520
Memtable switch count: 11
Read count: 5535
Read latency, micros: NaN ms.
Write count: 1286985
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 194
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 8590072
Compacted partition minimum size, bytes: 150
Compacted partition maximum size, bytes: 219342
Compacted partition mean size, bytes: 2453
Table (index): inventory.inventoryUID
SSTable count: 4
Space used (live), bytes: 325158555
Space used (total), bytes: 325542657
SSTable Compression Ratio: 0.5301921528572615
Number of keys (estimate): 2591488
Memtable cell count: 19653
Memtable data size, bytes: 1048576
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 1286899
Write latency, micros: 0.029 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 6365816
Compacted partition minimum size, bytes: 73
Compacted partition maximum size, bytes: 2816159
Compacted partition mean size, bytes: 139
----------------
Keyspace: TestVcellsPolishedData
Read Count: 168
Read Latency: 0.8543928571428571 ms.
Write Count: 753
Write Latency: 2.4579628154050464 ms.
Pending Tasks: 0
Table: test_vcells_polished_data
SSTable count: 4
Space used (live), bytes: 470222414
Space used (total), bytes: 470223694
SSTable Compression Ratio: 0.0
Number of keys (estimate): 53760
Memtable cell count: 30
Memtable data size, bytes: 110682
Memtable switch count: 9
Read count: 168
Read latency, micros: NaN ms.
Write count: 753
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 102088
Compacted partition minimum size, bytes: 3312
Compacted partition maximum size, bytes: 1629722
Compacted partition mean size, bytes: 16558
----------------
Keyspace: searchapi_dsp_approved_feed_test
Read Count: 154
Read Latency: 1.9904415584415585 ms.
Write Count: 644079
Write Latency: 0.025757469192443785 ms.
Pending Tasks: 0
Table: 20131011_182853_1381508933
SSTable count: 4
Space used (live), bytes: 1237696525
Space used (total), bytes: 1237836296
SSTable Compression Ratio: 0.35361982682795234
Number of keys (estimate): 613248
Memtable cell count: 31102
Memtable data size, bytes: 170821647
Memtable switch count: 13
Read count: 154
Read latency, micros: NaN ms.
Write count: 644079
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 769040
Compacted partition minimum size, bytes: 1917
Compacted partition maximum size, bytes: 17084
Compacted partition mean size, bytes: 6133
----------------
Keyspace: OpsCenter
Read Count: 1075487
Read Latency: 0.1405984033279807 ms.
Write Count: 14137149
Write Latency: 0.05747777009353159 ms.
Pending Tasks: 0
Table: settings
SSTable count: 1
Space used (live), bytes: 4732
Space used (total), bytes: 4732
SSTable Compression Ratio: 0.9629629629629629
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 0
Read count: 0
Read latency, micros: NaN ms.
Write count: 0
Write latency, micros: NaN ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 16
Compacted partition minimum size, bytes: 51
Compacted partition maximum size, bytes: 60
Compacted partition mean size, bytes: 60
Table: rollups60
SSTable count: 2
Space used (live), bytes: 285712246
Space used (total), bytes: 285739623
SSTable Compression Ratio: 0.549293451388619
Number of keys (estimate): 1408
Memtable cell count: 3216865
Memtable data size, bytes: 26214400
Memtable switch count: 60
Read count: 887875
Read latency, micros: 0.150 ms.
Write count: 9892918
Write latency, micros: 0.038 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 6912
Compacted partition minimum size, bytes: 125
Compacted partition maximum size, bytes: 943127
Compacted partition mean size, bytes: 370808
Table: rollups7200
SSTable count: 1
Space used (live), bytes: 2796816
Space used (total), bytes: 2805285
SSTable Compression Ratio: 0.46836366183323996
Number of keys (estimate): 768
Memtable cell count: 26426
Memtable data size, bytes: 1048576
Memtable switch count: 10
Read count: 0
Read latency, micros: NaN ms.
Write count: 82660
Write latency, micros: 0.025 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 2096
Compacted partition minimum size, bytes: 311
Compacted partition maximum size, bytes: 11864
Compacted partition mean size, bytes: 8688
Table: rollups86400
SSTable count: 1
Space used (live), bytes: 295399
Space used (total), bytes: 299204
SSTable Compression Ratio: 0.4900703646819302
Number of keys (estimate): 768
Memtable cell count: 2328
Memtable data size, bytes: 1048576
Memtable switch count: 5
Read count: 0
Read latency, micros: NaN ms.
Write count: 6652
Write latency, micros: 0.018 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 2096
Compacted partition minimum size, bytes: 125
Compacted partition maximum size, bytes: 1109
Compacted partition mean size, bytes: 850
Table: pdps
SSTable count: 2
Space used (live), bytes: 29363
Space used (total), bytes: 31131
SSTable Compression Ratio: 0.2850374290599562
Number of keys (estimate): 256
Memtable cell count: 720944
Memtable data size, bytes: 58720256
Memtable switch count: 14
Read count: 0
Read latency, micros: NaN ms.
Write count: 2176704
Write latency, micros: 0.170 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1312
Compacted partition minimum size, bytes: 29522
Compacted partition maximum size, bytes: 35425
Compacted partition mean size, bytes: 35425
Table: events_timeline
SSTable count: 1
Space used (live), bytes: 6652
Space used (total), bytes: 6762
SSTable Compression Ratio: 0.6203007518796992
Number of keys (estimate): 128
Memtable cell count: 0
Memtable data size, bytes: 0
Memtable switch count: 1
Read count: 0
Read latency, micros: NaN ms.
Write count: 1
Write latency, micros: 0.302 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 1296
Compacted partition minimum size, bytes: 73
Compacted partition maximum size, bytes: 1109
Compacted partition mean size, bytes: 598
Table: rollups300
SSTable count: 4
Space used (live), bytes: 62838990
Space used (total), bytes: 62847005
SSTable Compression Ratio: 0.40016431824415366
Number of keys (estimate): 2304
Memtable cell count: 643177
Memtable data size, bytes: 10485760
Memtable switch count: 18
Read count: 177700
Read latency, micros: 0.060 ms.
Write count: 1978194
Write latency, micros: 0.032 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 8880
Compacted partition minimum size, bytes: 61
Compacted partition maximum size, bytes: 263210
Compacted partition mean size, bytes: 54206
Table: events
SSTable count: 4
Space used (live), bytes: 31275
Space used (total), bytes: 31391
SSTable Compression Ratio: 0.4495362218092923
Number of keys (estimate): 512
Memtable cell count: 6
Memtable data size, bytes: 1790
Memtable switch count: 4
Read count: 9912
Read latency, micros: 0.721 ms.
Write count: 20
Write latency, micros: 0.219 ms.
Pending tasks: 0
Bloom filter false positives: 0
Bloom filter false ratio: 0.00000
Bloom filter space used, bytes: 2632
Compacted partition minimum size, bytes: 180
Compacted partition maximum size, bytes: 446
Compacted partition mean size, bytes: 250
----------------
{noformat}
'nodetool info' taken within a few seconds:
{noformat}
[jre@cassandra5 ~]$ nodetool info
Token : (invoke with -T/--tokens to see all 256 tokens)
ID : 72680375-d5b8-49ae-a33b-b99fec3009d3
Gossip active : true
Thrift active : true
Native Transport active: true
Load : 15.63 GB
Generation No : 1381357639
Uptime (seconds) : 1011643
Heap Memory (MB) : 3723.10 / 11980.81
Data Center : Oakland
Rack : C7.10.11
Exceptions : 118
Key Cache : size 3380824 (bytes), capacity 536870912 (bytes), 2198265 hits, 2208066 requests, 0.981 recent hit rate, 7200 save period in seconds
Row Cache : size 17276702 (bytes), capacity 268435456 (bytes), 52996 hits, 55926 requests, NaN recent hit rate, 0 save period in seconds
{noformat}
> "Load" calculated in "nodetool info" is strange/inaccurate in JBOD setups
> -------------------------------------------------------------------------
>
> Key: CASSANDRA-6179
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6179
> Project: Cassandra
> Issue Type: Bug
> Environment: JBOD layouts
> Reporter: J. Ryan Earl
> Assignee: Mikhail Stepura
>
> We recently noticed that the storage capacity on Cassandra nodes using JBOD layout was returning what looks close to the average data volume size, instead of the sum of all JBOD data volumes. It's not exactly an average and I haven't had time to dig into the code to see what it's really doing, it's like some sort of sample of the JBOD volumes sizes.
> So looking at the JBOD volumes we see:
> {noformat}
> [jre@cassandra2 ~]$ df -h
> Filesystem Size Used Avail Use% Mounted on
> [...]
> /dev/sdc1 1.1T 9.4G 1.1T 1% /data/1
> /dev/sdd1 1.1T 9.2G 1.1T 1% /data/2
> /dev/sde1 1.1T 11G 1.1T 1% /data/3
> /dev/sdf1 1.1T 11G 1.1T 1% /data/4
> /dev/sdg1 1.1T 9.2G 1.1T 1% /data/5
> /dev/sdh1 1.1T 11G 1.1T 1% /data/6
> /dev/sdi1 1.1T 9.8G 1.1T 1% /data/7
> {noformat}
> Looking at 'nodetool info' we see:
> {noformat}
> [jre@cassandra2 ~]$ nodetool info
> Token : (invoke with -T/--tokens to see all 256 tokens)
> ID : 631f0be3-ce52-4eb9-b48b-069fbfdf0a97
> Gossip active : true
> Thrift active : true
> Native Transport active: true
> Load : 10.57 GB
> {noformat}
> So there are 7 disks in a JBOD configuration in this example, the sum should be closer to 70G for each node. Maybe we're misinterpreting what this value should be, but things like OpsCenter appear to use this "load" value as the size of data on the local node, which I expect to be the sum of JBOD volumes.
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