Wei Deng created CASSANDRA-12498:
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Summary: Shorten the sstable log message as it unnecessarily
contains the full path of a SSTable
Key: CASSANDRA-12498
URL: https://issues.apache.org/jira/browse/CASSANDRA-12498
Project: Cassandra
Issue Type: Improvement
Components: Observability
Reporter: Wei Deng
Priority: Minor
There are a lot of places in debug.log where we print out the name of a
SSTable. This is useful to look at the full path of a SSTable file when you're
investigating individual SSTable. However, during compaction, we often see 32
SSTables getting compacted at the same time, and the corresponding log line
becomes very repetitive and hard to read as most of them are repeating the same
first part of the file system path again and again, like the following:
{noformat}
DEBUG [CompactionExecutor:94] 2016-08-18 06:33:17,185 CompactionTask.java:146
- Compacting (a5ca2f10-650d-11e6-95ef-a561ab3c45e8)
[/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-200-big-Data.db:level=1,
/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-201-big-Data.db:level=1,
/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-16-big-Data.db:level=0,
/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-204-big-Data.db:level=1,
/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-205-big-Data.db:level=1,
/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-203-big-Data.db:level=1,
/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-202-big-Data.db:level=1,
/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-207-big-Data.db:level=1,
/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-206-big-Data.db:level=1,
/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-3-big-Data.db:level=0,
/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-208-big-Data.db:level=1,
/var/lib/cassandra/data/keyspace1/standard1-139cc441650d11e6a038bfe806276de2/mb-209-big-Data.db:level=1,
]
{noformat}
We should remove any text one level before ksName/cfName-UUID/ as it's very
easy to get them from cassandra.yaml. For JBOD configuration where you have
multiple data directories, keeping the one level before ksName/cfName-UUID
should be adequate.
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