44 lines
1.5 KiB
Plaintext
44 lines
1.5 KiB
Plaintext
[[breaking-changes-2.0]]
|
|
== Breaking changes in 2.0
|
|
|
|
This section discusses the changes that you need to be aware of when migrating
|
|
your application to Elasticsearch 2.0.
|
|
|
|
=== Indices API
|
|
|
|
The <<alias-retrieving, get alias api>> will, by default produce an error response
|
|
if a requested index does not exist. This change brings the defaults for this API in
|
|
line with the other Indices APIs. The <<multi-index>> options can be used on a request
|
|
to change this behavior
|
|
|
|
=== Partial fields
|
|
|
|
Partial fields were deprecated since 1.0.0beta1 in favor of <<search-request-source-filtering,source filtering>>.
|
|
|
|
=== More Like This Field
|
|
|
|
The More Like This Field query has been removed in favor of the <<query-dsl-mlt-query, More Like This Query>>
|
|
restrained set to a specific `field`.
|
|
|
|
=== Routing
|
|
|
|
The default hash function that is used for routing has been changed from djb2 to
|
|
murmur3. This change should be transparent unless you relied on very specific
|
|
properties of djb2. This will help ensure a better balance of the document counts
|
|
between shards.
|
|
|
|
In addition, the following node settings related to routing have been deprecated:
|
|
|
|
[horizontal]
|
|
|
|
`cluster.routing.operation.hash.type`::
|
|
|
|
This was an undocumented setting that allowed to configure which hash function
|
|
to use for routing. `murmur3` is now enforced on new indices.
|
|
|
|
`cluster.routing.operation.use_type`::
|
|
|
|
This was an undocumented setting that allowed to take the `_type` of the
|
|
document into account when computing its shard (default: `false`). `false` is
|
|
now enforced on new indices.
|