Reducing tombstones impact in queue access patterns through rolling shards?
2014-08-28 14:18:29 GMT
PoolTimeoutException while connecting to Cassandra
2014-08-28 08:04:30 GMT
How often are JMX Cassandra metrics reset?
2014-08-27 19:38:15 GMT
I’m using JMX to retrieve Cassandra metrics. I notice that Max and Count are cumulative and aren’t reset. How often are the stats for Mean, 99tthPercentile, etc reset back to zero?
For example, 99thPercentile shows as 1.5 mls. Over how many minutes?
LatencyUnit = MICROSECONDS
FiveMinuteRate = 1.12
FifteenMinuteRate = 1.11
RateUnit = SECONDS
MeanRate = 1.65
OneMinuteRate = 1.13
EventType = calls
Max = 237,373.37
Count = 961,312
50thPercentile = 383.2
Mean = 908.46
Min = 95.64
StdDev = 3,034.62
75thPercentile = 626.34
95thPercentile = 954.31
98thPercentile = 1,443.11
99thPercentile = 1,472.4
999thPercentile = 1,858.1
Donald A. Smith
| Senior Software Engineer
P: 425.201.3900 x 3866
C: (206) 819-5965
F: (646) 443-2333
donalds <at> AudienceScience.com
[RELEASE] Apache Cassandra 2.0.10 released
2014-08-27 15:29:06 GMT
Bulk load in cassandra
2014-08-27 12:13:21 GMT
I installed Cassandra on one node successfully using CLI I am able to add a table to the keyspace as well as retrieve the data from the table. My query is if I have text file on my local file system and I want to load on Cassandra cluster or you can say bulk load. How can I achieve that. Please help me out.
BIDW BU/ Big Data CoE
L&T Infotech Ltd, Hinjewadi,Pune
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Can't Add AWS Node due to /mnt/cassandra/data directory
2014-08-27 08:50:16 GMT
Node is still provisioning, not attempting to determine ip.
INFO [Initialization] 2014-08-27 08:40:57,848 Sleeping for 20s before trying to determine IP over JMX again
INFO [Initialization] 2014-08-27 08:41:17,849 Node is still provisioning, not attempting to determine ip.
INFO [Initialization] 2014-08-27 08:41:17,849 Sleeping for 20s before trying to determine IP over JMX again
INFO [Initialization] 2014-08-27 08:41:37,849 Node is still provisioning, not attempting to determine ip.
INFO [Initialization] 2014-08-27 08:41:37,850 Sleeping for 20s before trying to determine IP over JMX again
INFO [Initialization] 2014-08-27 08:41:57,850 Node is still provisioning, not attempting to determine ip.
are dynamic columns supported at all in CQL 3?
2014-08-26 19:12:15 GMT
Too many SSTables after rebalancing cluster (LCS)
2014-08-26 18:38:10 GMT
Node N+1 (old node): [1, 10, 87, 113, 1076, 0, 0, 0, 0] (total: 1287)
Any help would be very much appreciated.
Question about MemoryMeter liveRatio
2014-08-26 17:20:48 GMT
I’m trying to understand what is the liveRatio and if I have to care about it.
I found some reference on the web and if I understand them, the liveRatio represents the Memtable size divided by the amount of data serialized on the disk. Is it the truth?
When I see the following log, what can I deduce about it ?
INFO [MemoryMeter:1] 2014-08-26 19:02:41,047 Memtable.java (line 481) CFS(Keyspace='ufapi', ColumnFamily='users') liveRatio is 8.52308554793235 (just-counted was 8.514143642185562). calculation took 3613ms for 272646 cells
INFO [MemoryMeter:1] 2014-08-26 18:36:09,965 Memtable.java (line 481) CFS(Keyspace='system', ColumnFamily='compactions_in_progress') liveRatio is 40.1893491
1242604 (just-counted was 16.37869822485207). calculation took 0ms for 7 cells
According to my read, the liveRatio is set between 1 and 64. If My liveRatio is around 64, should I care about some things?
Does Cassandra use the liveRatio for some internal task or it is just a metric?
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CQL performance inserting multiple cluster keys under same partition key
2014-08-26 16:50:37 GMT