Brandon Williams created CASSANDRA-11163:
--------------------------------------------
Summary: Summaries are needlessly rebuilt when the BF FP ratio is
changed
Key: CASSANDRA-11163
URL: https://issues.apache.org/jira/browse/CASSANDRA-11163
Project: Cassandra
Issue Type: Bug
Components: Core
Reporter: Brandon Williams
Fix For: 2.1.x, 2.2.x, 3.0.x
This is from trunk, but I also this happen on 2.0:
Before:
{noformat}
root@bw-1:/srv/cassandra# ls -ltr
/var/lib/cassandra/data/keyspace1/standard1-071efdc0d11811e590c3413ee28a6c90/
total 221460
drwxr-xr-x 2 root root 4096 Feb 11 23:34 backups
-rw-r--r-- 1 root root 80 Feb 11 23:50 ma-6-big-TOC.txt
-rw-r--r-- 1 root root 26518 Feb 11 23:50 ma-6-big-Summary.db
-rw-r--r-- 1 root root 10264 Feb 11 23:50 ma-6-big-Statistics.db
-rw-r--r-- 1 root root 2607705 Feb 11 23:50 ma-6-big-Index.db
-rw-r--r-- 1 root root 192440 Feb 11 23:50 ma-6-big-Filter.db
-rw-r--r-- 1 root root 10 Feb 11 23:50 ma-6-big-Digest.crc32
-rw-r--r-- 1 root root 35212125 Feb 11 23:50 ma-6-big-Data.db
-rw-r--r-- 1 root root 2156 Feb 11 23:50 ma-6-big-CRC.db
-rw-r--r-- 1 root root 80 Feb 11 23:50 ma-7-big-TOC.txt
-rw-r--r-- 1 root root 26518 Feb 11 23:50 ma-7-big-Summary.db
-rw-r--r-- 1 root root 10264 Feb 11 23:50 ma-7-big-Statistics.db
-rw-r--r-- 1 root root 2607614 Feb 11 23:50 ma-7-big-Index.db
-rw-r--r-- 1 root root 192432 Feb 11 23:50 ma-7-big-Filter.db
-rw-r--r-- 1 root root 9 Feb 11 23:50 ma-7-big-Digest.crc32
-rw-r--r-- 1 root root 35190400 Feb 11 23:50 ma-7-big-Data.db
-rw-r--r-- 1 root root 2152 Feb 11 23:50 ma-7-big-CRC.db
-rw-r--r-- 1 root root 80 Feb 11 23:50 ma-5-big-TOC.txt
-rw-r--r-- 1 root root 104178 Feb 11 23:50 ma-5-big-Summary.db
-rw-r--r-- 1 root root 10264 Feb 11 23:50 ma-5-big-Statistics.db
-rw-r--r-- 1 root root 10289077 Feb 11 23:50 ma-5-big-Index.db
-rw-r--r-- 1 root root 757384 Feb 11 23:50 ma-5-big-Filter.db
-rw-r--r-- 1 root root 9 Feb 11 23:50 ma-5-big-Digest.crc32
-rw-r--r-- 1 root root 139201355 Feb 11 23:50 ma-5-big-Data.db
-rw-r--r-- 1 root root 8508 Feb 11 23:50 ma-5-big-CRC.db
root@bw-1:/srv/cassandra# md5sum
/var/lib/cassandra/data/keyspace1/standard1-071efdc0d11811e590c3413ee28a6c90/ma-5-big-Summary.db
5fca154fc790f7cfa37e8ad6d1c7552c
{noformat}
BF ratio changed, node restarted:
{noformat}
root@bw-1:/srv/cassandra# ls -ltr
/var/lib/cassandra/data/keyspace1/standard1-071efdc0d11811e590c3413ee28a6c90/
total 242168
drwxr-xr-x 2 root root 4096 Feb 11 23:34 backups
-rw-r--r-- 1 root root 80 Feb 11 23:50 ma-6-big-TOC.txt
-rw-r--r-- 1 root root 10264 Feb 11 23:50 ma-6-big-Statistics.db
-rw-r--r-- 1 root root 2607705 Feb 11 23:50 ma-6-big-Index.db
-rw-r--r-- 1 root root 192440 Feb 11 23:50 ma-6-big-Filter.db
-rw-r--r-- 1 root root 10 Feb 11 23:50 ma-6-big-Digest.crc32
-rw-r--r-- 1 root root 35212125 Feb 11 23:50 ma-6-big-Data.db
-rw-r--r-- 1 root root 2156 Feb 11 23:50 ma-6-big-CRC.db
-rw-r--r-- 1 root root 80 Feb 11 23:50 ma-7-big-TOC.txt
-rw-r--r-- 1 root root 10264 Feb 11 23:50 ma-7-big-Statistics.db
-rw-r--r-- 1 root root 2607614 Feb 11 23:50 ma-7-big-Index.db
-rw-r--r-- 1 root root 192432 Feb 11 23:50 ma-7-big-Filter.db
-rw-r--r-- 1 root root 9 Feb 11 23:50 ma-7-big-Digest.crc32
-rw-r--r-- 1 root root 35190400 Feb 11 23:50 ma-7-big-Data.db
-rw-r--r-- 1 root root 2152 Feb 11 23:50 ma-7-big-CRC.db
-rw-r--r-- 1 root root 80 Feb 11 23:50 ma-5-big-TOC.txt
-rw-r--r-- 1 root root 10264 Feb 11 23:50 ma-5-big-Statistics.db
-rw-r--r-- 1 root root 10289077 Feb 11 23:50 ma-5-big-Index.db
-rw-r--r-- 1 root root 757384 Feb 11 23:50 ma-5-big-Filter.db
-rw-r--r-- 1 root root 9 Feb 11 23:50 ma-5-big-Digest.crc32
-rw-r--r-- 1 root root 139201355 Feb 11 23:50 ma-5-big-Data.db
-rw-r--r-- 1 root root 8508 Feb 11 23:50 ma-5-big-CRC.db
-rw-r--r-- 1 root root 80 Feb 12 00:03 ma-8-big-TOC.txt
-rw-r--r-- 1 root root 14902 Feb 12 00:03 ma-8-big-Summary.db
-rw-r--r-- 1 root root 10264 Feb 12 00:03 ma-8-big-Statistics.db
-rw-r--r-- 1 root root 1458631 Feb 12 00:03 ma-8-big-Index.db
-rw-r--r-- 1 root root 10808 Feb 12 00:03 ma-8-big-Filter.db
-rw-r--r-- 1 root root 10 Feb 12 00:03 ma-8-big-Digest.crc32
-rw-r--r-- 1 root root 19660275 Feb 12 00:03 ma-8-big-Data.db
-rw-r--r-- 1 root root 1204 Feb 12 00:03 ma-8-big-CRC.db
-rw-r--r-- 1 root root 26518 Feb 12 00:04 ma-7-big-Summary.db
-rw-r--r-- 1 root root 26518 Feb 12 00:04 ma-6-big-Summary.db
-rw-r--r-- 1 root root 104178 Feb 12 00:04 ma-5-big-Summary.db
root@bw-1:/srv/cassandra# md5sum
/var/lib/cassandra/data/keyspace1/standard1-071efdc0d11811e590c3413ee28a6c90/ma-5-big-Summary.db
5fca154fc790f7cfa37e8ad6d1c7552c
{noformat}
This hurts startup time and appears to do nothing useful whatsoever.
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