Elasticsearch Dumper

EXAMPLE:

elasticsearch-dumper -s http://source:9200 -d http://destination:9200 -i index1,index2

INSTALL:

1. go get github.com/hoffoo/elasticsearch-dump
2. or download a prebuilt binary here: https://github.com/hoffoo/elasticsearch-dump/releases/

Application Options:
  -s, --source=     source elasticsearch instance
  -d, --dest=       destination elasticsearch instance
  -c, --count=      number of documents at a time: ie "size" in the scroll request (100)
  -t, --time=       scroll time (1m)
  -f, --force       delete destination index before copying (false)
      --shards=     set a number of shards on newly created indexes
      --docs-only   load documents only, do not try to recreate indexes (false)
      --index-only  only create indexes, do not load documents (false)
      --replicate   enable replication while indexing into the new indexes (false)
  -i, --indexes=    list of indexes to copy, comma separated (_all)
  -a, --all         copy indexes starting with . and _ (false)
  -w, --workers=    concurrency (1)
      --settings    copy sharding settings from source (true)
      --green       wait for both hosts cluster status to be green before dump. otherwise yellow is okay (false)

NOTES:

1. Has been tested getting data from 0.9 onto a 1.4 box. For other scenaries YMMV. (look out for this bug: elastic/elasticsearch#5165)
2. Copies using the _source field in elasticsearch. If you have made modifications to it (excluding fields, etc) they will not be indexed on the destination host.
3. --force will delete indexes on the destination host. Otherwise an error will be returned if the index exists
4. --time is the scroll time passed to the source host, default is 1m. This is a string in es's format.
5. --count is the number of documents that will be request and bulk indexed at a time. Note that this depends on the number of shards (ie: size of 10 on 5 shards is 50 documents)
6. --indexes is a comma separated list of indexes to copy
7. --all indexes starting with . and _ are ignored by default, --all overrides this behavior
8. --workers concurrency when we post to the bulk api. Only one post happens at a time, but higher concurrency should give you more throughput when using larger scroll sizes.
9. Ports are required, otherwise 80 is the assumed port (what)

BUGS:

1. It will not do anything special when copying the _id (copies _id from source host). If _id is remapped it may not do what you want.
2. Should assume a default port of 9200