default_time_to_live set to 604800 instead to 0

[Aleksandar Kocic]

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Installation details
Scylla version (or git commit hash): Scylla 5.4.3-0.20240211.cf42ca0c2a65
Cluster size: 3
OS (RHEL/CentOS/Ubuntu/AWS AMI): Ubuntu 22.04.3 LTS

I created a table using the command below and expected default_time_to_live = 0:

CREATE TABLE IF NOT EXISTS prod.telemetry (
    t timestamp,
    m text,
    b text,
    st timestamp,
    u text,
    v double,
    PRIMARY KEY ((b,m), t)
)
    WITH CLUSTERING ORDER BY (t DESC)
    AND COMPACTION = {'class': 'TimeWindowCompactionStrategy',
        'compaction_window_size': '1',
        'compaction_window_unit': 'DAYS'};

Instead, I got default_time_to_live = 604800:

CREATE TABLE prod.telemetry (
    b text,
    m text,
    t timestamp,
    st timestamp,
    u text,
    v double,
    PRIMARY KEY ((b, m), t)
) WITH CLUSTERING ORDER BY (t DESC)
    AND bloom_filter_fp_chance = 0.01
    AND caching = {'keys': 'ALL', 'rows_per_partition': 'ALL'}
    AND comment = ''
    AND compaction = {'base_time_seconds': '3600', 'class': 'TimeWindowCompactionStrategy', 'compaction_window_size': '1', 'compaction_window_unit': 'DAYS', 'max_sstable_age_days': '1'}
    AND compression = {'sstable_compression': 'org.apache.cassandra.io.compress.LZ4Compressor'}
    AND crc_check_chance = 1.0
    AND dclocal_read_repair_chance = 0.0
    AND default_time_to_live = 604800
    AND gc_grace_seconds = 864000
    AND max_index_interval = 2048
    AND memtable_flush_period_in_ms = 0
    AND min_index_interval = 128
    AND read_repair_chance = 0.0
    AND speculative_retry = '99.0PERCENTILE';

[Tzach Livyatan]

@raphaelsc ?

[Raphael "Raph" Carvalho]

I noticed IF NOT EXISTS clause. @kocic11 Any chance the table with that setting existed already?

this is what I get locally:

cqlsh> CREATE TABLE IF NOT EXISTS prod.telemetry (     t timestamp,     m text,     b text,     st timestamp,     u text,     v double,     PRIMARY KEY ((b,m), t) )     WITH CLUSTERING ORDER BY (t DESC)     AND COMPACTION = {'class': 'TimeWindowCompactionStrategy',         'compaction_window_size': '1',         'compaction_window_unit': 'DAYS'};
cqlsh> describe prod

CREATE KEYSPACE prod WITH replication = {'class': 'NetworkTopologyStrategy', 'datacenter1': '1'}  AND durable_writes = true;

CREATE TABLE prod.telemetry (
    b text,
    m text,
    t timestamp,
    st timestamp,
    u text,
    v double,
    PRIMARY KEY ((b, m), t)
) WITH CLUSTERING ORDER BY (t DESC)
    AND bloom_filter_fp_chance = 0.01
    AND caching = {'keys': 'ALL', 'rows_per_partition': 'ALL'}
    AND comment = ''
    AND compaction = {'class': 'TimeWindowCompactionStrategy', 'compaction_window_size': '1', 'compaction_window_unit': 'DAYS'}
    AND compression = {'sstable_compression': 'org.apache.cassandra.io.compress.LZ4Compressor'}
    AND crc_check_chance = 1.0
    AND default_time_to_live = 0
    AND gc_grace_seconds = 864000
    AND max_index_interval = 2048
    AND memtable_flush_period_in_ms = 0
    AND min_index_interval = 128
    AND speculative_retry = '99.0PERCENTILE';

[Raphael "Raph" Carvalho]

if you want to keep existing table, you can just do alter table prod.telemetry WITH default_time_to_live = 0;

[Aleksandar Kocic]

It is possible that the table already existed. I'll try the alter table command and monitor if the issue reappears.

[Raphael "Raph" Carvalho]

please close the issue once you validate it's not an issue on our end.

[Aleksandar Kocic]

I am closing the issue for now. Thanks.