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From Rene Kochen <Rene.Koc...@emea.schange.com>
Subject Flushing behavior in Cassandra 0.8
Date Tue, 21 Jun 2011 10:12:40 GMT
I try to understand the flushing behavior in Cassandra 0.8

When I create rows, after a few seconds, I see the following line in the log:

INFO 11:18:46,470 flushing high-traffic column family ColumnFamilyStore(table='Traxis', columnFamily='Customers')
INFO 11:18:46,471 Enqueuing flush of Memtable-Customers@14306556(697958/50059836 serialized/live
bytes, 30346 ops)
INFO 11:18:46,472 Writing Memtable-Customers@14306556(697958/50059836 serialized/live bytes,
30346 ops)
INFO 11:18:47,415 Completed flushing C:\Cassandra\Storage\data\Traxis\Customers-g-1-Data.db
(4157370 bytes)

The super-column-family is configured as follows:

Memtable thresholds: 0.2953125/63/1440 (millions of ops/MB/minutes):

I don't think any of the three tresholds should trigger the flush?

Thanks,

Rene

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