Run compaction on cluster

Dear Team,

I have setup a cassandra cluster for 3 m/c.

[root@ip-172-31-21-222 ~]# nodetool status
Datacenter: datacenter1
=======================
Status=Up/Down

Note: Non-system keyspaces don't have the same replication settings, effective ownership information is meaningless
[root@ip-172-31-21-222 ~]#

 

Now i have deleted around 40-45 GB data but space seems is not vacant.

I'm using SizeTieredCompactionStrategy and below is my table defination.

 

CREATE TABLE test.att_103 (
md5 text PRIMARY KEY,
arcsize int,
att_str blob,
attsize int,
udate timestamp
) WITH bloom_filter_fp_chance = 0.01
AND caching = '{"keys":"ALL", "rows_per_partition":"NONE"}'
AND comment = ''
AND compaction = {'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy'}
AND compression = {'sstable_compression': 'org.apache.cassandra.io.compress.LZ4Compressor'}
AND dclocal_read_repair_chance = 0.1
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 read_repair_chance = 0.0
AND speculative_retry = '99.0PERCENTILE';

I have dumped data using sstable2json command to verify whether my column data is deleted or not.

e.g

{"key": "9b7937de43aa22fc3bf18ec72d86140b",  "cells": [["att_str",1533305633,1533305633552000,"d"],            ["udate","2018-08-03 14:13Z",1533305633552000]]}

 

Now can you help me here regarding how to run compaction manually instead of waiting for 10 days of grace period.

 

Thanks

Wasil.