When we deleted the indexes, the data were just marked by deleted.
We can list all indexes to show status.
sudo curl 'localhost:9200/_cat/indices?v'
It will show the health, index name, pri, rep, docs.count, docs.deleted, store.size, pri.store.size.
health index pri rep docs.count docs.deleted store.size pri.store.size
yellow kibana-int 5 1 5 0 66.7kb 66.7kb
yellow logstash-2015.02.13 5 1 402030 3366353 1.2gb 1.2gb
yellow logstash-2015.02.18 5 1 86843 3393979 1.1gb 1.1gb
yellow logstash-2015.02.15 5 1 218402 3063776 1.2gb 1.2gb
yellow logstash-2015.02.03 5 1 178621 2072000 756.3mb 756.3mb
yellow logstash-2015.02.06 5 1 466185 2479658 963.4mb 963.4mb
yellow logstash-2015.02.24 5 1 364473 0 166.5mb 166.5mb
yellow logstash-2015.02.02 5 1 313488 1838855 710.1mb 710.1mb
yellow logstash-2015.02.07 5 1 371602 3397300 1.2gb 1.2gb
yellow logstash-2015.02.21 5 1 3583288 0 1.2gb 1.2gb
yellow logstash-2015.02.22 5 1 3554707 0 1.1gb 1.1gb
yellow logstash-2015.02.23 5 1 3680625 0 1.2gb 1.2gb
If we want to clear the deleted indexes, we can optimize it.
sudo curl -XPOST 'http://localhost:9200/_optimize'
And it will reply this message.
{"_shards":{"total":310,"successful":155,"failed":0}}
Then when we list all indexes again, we will see the deleted indexes are gone.
cowman@roamingcacti:~$ sudo curl 'localhost:9200/_cat/indices?v'
health index pri rep docs.count docs.deleted store.size pri.store.size
yellow kibana-int 5 1 5 0 66.5kb 66.5kb
yellow logstash-2015.02.13 5 1 402030 1512300 611.7mb 611.7mb
yellow logstash-2015.02.18 5 1 86843 1374178 491.9mb 491.9mb
yellow logstash-2015.02.15 5 1 218402 1404862 536.7mb 536.7mb
yellow logstash-2015.02.03 5 1 178621 2072000 756.2mb 756.2mb
yellow logstash-2015.02.06 5 1 466185 2479658 963.4mb 963.4mb
yellow logstash-2015.02.24 5 1 378777 0 156.9mb 156.9mb
yellow logstash-2015.02.02 5 1 313488 1838855 710.1mb 710.1mb
yellow logstash-2015.02.07 5 1 371602 1394610 566.5mb 566.5mb
yellow logstash-2015.02.21 5 1 3583288 0 1.2gb 1.2gb
yellow logstash-2015.02.22 5 1 3554707 0 1.1gb 1.1gb
yellow logstash-2015.02.23 5 1 3680625 0 1.2gb 1.2gb